{ "name": "Trailer Securement Ledger", "version": "1.2.0", "verified_date": "2026-09-17", "data_edition": "Compiled September 2026; underlying source dates are retained in each row", "publisher": "Uptime Dock & Door", "editorial_byline": "Uptime Dock & Door Research", "canonical_url": "https://uptimedockanddoor.com/research/vehicle-restraints-vs-wheel-chocks/", "scope": "US commercial loading-dock comparison; selected manufacturer documents and scoped legal reference records, not a market census or facility compliance determination", "rights_note": "Original selection, short factual paraphrases, and editorial analysis; third-party rights remain with their owners. No new open license is assigned to third-party material.", "missing_values": "Empty CSV fields are JSON null. Read record_type, device_family, force_qualifier and scope_note to distinguish not stated from not applicable. Neither means zero.", "definitions": { "force_lb": "Manufacturer-stated pounds-force for restraint figures; preserve source wording/qualifier.", "vehicle_weight_lb": "Gross vehicle operating weight for named chock ratings, not pull-out force.", "payload": "Separate manufacturer-stated cargo capacity; not a conversion of gross vehicle weight.", "vertical_window_span_in": "Calculated difference between published guard-height endpoints, not a laboratory measurement or permitted legal height range." }, "federal_reference_geometry": { "source": "49 CFR 393.86(a)(2)-(a)(5)", "minimum_ground_clearance_in": null, "minimum_ground_clearance_note": "No minimum ground clearance specified in these clauses. Do not replace this null with zero or infer that every lower position is legal.", "scope_note": "Covered vehicles and explicit rounded/curved-end exceptions only; see authority rows A16-A18, current rule and inspection criteria. No fit verdict is computed." }, "tables": { "authority-ledger": [ { "id": "A01", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "29 CFR 1910.178(k)(1)", "subject": "Powered industrial trucks - highway trucks", "edition_or_date": "Current as read", "status_as_read": "In force", "who_it_applies_to": "General industry employers whose powered industrial trucks board highway trucks", "plain_english_requirement": "Set the truck's brakes and place wheel chocks under the rear wheels so the truck cannot roll while a powered industrial truck is on board.", "names_wheel_chocks": "Yes", "text_itself_allows_a_restraint": "No - the sentence names wheel chocks only", "source_url": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.178", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "29 CFR 1910.178(k)(1)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A02", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "29 CFR 1910.178(k)(2)", "subject": "Powered industrial trucks - railroad cars", "edition_or_date": "Current as read", "status_as_read": "In force", "who_it_applies_to": "Employers loading or unloading railroad cars", "plain_english_requirement": "Provide wheel stops or other recognized positive protection so rail cars cannot move during loading or unloading.", "names_wheel_chocks": "No - says wheel stops", "text_itself_allows_a_restraint": "Yes - 'or other recognized positive protection'", "source_url": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.178", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "29 CFR 1910.178(k)(2)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A03", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "29 CFR 1910.178(k)(3)", "subject": "Powered industrial trucks - uncoupled semitrailers", "edition_or_date": "Current as read", "status_as_read": "In force", "who_it_applies_to": "Employers loading semitrailers not coupled to a tractor", "plain_english_requirement": "Fixed jacks may be necessary to support the semitrailer and prevent it up-ending during loading or unloading.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable - a different hazard (up-ending, not rolling)", "source_url": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.178", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "29 CFR 1910.178(k)(3)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A04", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "29 CFR 1910.178(m)(7)", "subject": "Powered industrial trucks - truck operations", "edition_or_date": "Current as read", "status_as_read": "In force", "who_it_applies_to": "General industry employers loading or unloading trucks, trailers or rail cars", "plain_english_requirement": "Set brakes and put wheel blocks in place to prevent movement during loading or unloading; check the vehicle floor for breaks and weakness before driving onto it.", "names_wheel_chocks": "Yes - 'wheel blocks'", "text_itself_allows_a_restraint": "No - the sentence names wheel blocks only", "source_url": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.178", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "29 CFR 1910.178(m)(7)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A05", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "29 CFR 1910.26(d)", "subject": "Dockboards", "edition_or_date": "Created by the 2016 walking-working surfaces rule, 81 FR 82990", "status_as_read": "In force", "who_it_applies_to": "General industry employers using dockboards within 1910 Subpart D scope", "plain_english_requirement": "Use measures, such as wheel chocks or sand shoes, to prevent the transport vehicle under the dockboard from moving while employees are on the dockboard.", "names_wheel_chocks": "Yes - as an example", "text_itself_allows_a_restraint": "Yes - 'measures, such as' is open-ended", "source_url": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.26", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "1910.26(d); dockboard definition at 1910.21(b)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A06", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "29 CFR 1910.178(l)(3)(i)(A), (l)(3)(i)(M), (l)(3)(ii)(A)", "subject": "Powered industrial truck operator training", "edition_or_date": "Current as read", "status_as_read": "In force", "who_it_applies_to": "Employers training powered industrial truck operators", "plain_english_requirement": "Operators must be trained on operating instructions, warnings and precautions for the truck and for the vehicles they drive onto, and on surface conditions where they operate. OSHA's 2011 letter reads this as requiring operators to be trained not to drive onto a trailer at the dock unless it is secured or restricted from movement first.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "29 CFR 1910.178(l)(3)(i)(A), (l)(3)(i)(M), (l)(3)(ii)(A)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A07", "jurisdiction": "US federal", "instrument_type": "Enforcement directive", "citation": "OSHA STD 01-11-007 (formerly STD 1-11.7)", "subject": "Mechanical means to secure trucks or trailers to a loading dock", "edition_or_date": "5 August 1981", "status_as_read": "Issuer directive text verified; also linked by OSHA loading/unloading guidance and standards directive index. Direct-page archive-banner status not established.", "who_it_applies_to": "OSHA compliance officers", "plain_english_requirement": "Not using wheel chocks is treated as a de minimis violation and is not cited when a positive mechanical means secures the trailer to the dock, on three conditions: the system is installed and used so it effectively prevents movement during loading, unloading and boarding; all the equipment is installed, maintained and used as the manufacturer recommends; and any damaged equipment is removed from service immediately.", "names_wheel_chocks": "Yes", "text_itself_allows_a_restraint": "Yes - this is the document that allows it", "source_url": "https://www.osha.gov/enforcement/directives/std-01-11-007", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "STD 01-11-007, F.1-F.3", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": "https://www.osha.gov/powered-industrial-trucks/loading-unloading | https://www.osha.gov/laws-regs/standardinterpretations/2005-09-14 | https://webapps.dol.gov/elaws/elg/osha.htm" }, { "id": "A08", "jurisdiction": "US federal", "instrument_type": "Enforcement directive", "citation": "OSHA CPL 02-01-030 (formerly CPL 2-1.30)", "subject": "Chocking of tractor trailers under the powered industrial truck standard", "edition_or_date": "19 October 1999 per OSHA directive index; March 2011 letter says 1 October 1999", "status_as_read": "Named as available and circulated to State Plan officials in OSHA's 14 June 2011 letter", "who_it_applies_to": "OSHA and State Plan enforcement staff", "plain_english_requirement": "OSHA's directive index dates CPL 02-01-030 to 19 October 1999. OSHA's 2011 letters describe its rescission of STD 1-11.5 and its State Plan guidance; the preemption history must be read with the later 2005 and 2011 interpretations.", "names_wheel_chocks": "Yes", "text_itself_allows_a_restraint": "Not addressed directly", "source_url": "https://www.osha.gov/laws-regs/interlinking/standards/1910.178%28k%29%281%29/directives", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "CPL 02-01-030 index entry; June 2011 interpretation, response 2", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Date disagreement is retained; linked 2011 interpretations describe policy. The index does not establish the whole directive text.", "additional_source_urls": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07 | https://www.osha.gov/laws-regs/standardinterpretations/2011-06-14" }, { "id": "A09", "jurisdiction": "US federal", "instrument_type": "Letter of interpretation", "citation": "OSHA letter, 9 February 1996", "subject": "What 'rear wheels' means in 1910.178(k)(1)", "edition_or_date": "9 February 1996", "status_as_read": "Posted", "who_it_applies_to": "Employers chocking at docks", "plain_english_requirement": "The standard is met when enough chocks are placed under the rear trailer wheels to prevent unintended movement while the vehicle is boarded.", "names_wheel_chocks": "Yes", "text_itself_allows_a_restraint": "Letter also encloses STD 1-11.7; quantity answer does not create an unconditional substitution rule", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/1996-02-09", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "OSHA letter, 9 February 1996", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A10", "jurisdiction": "US federal", "instrument_type": "Letter of interpretation", "citation": "OSHA letter to Michael O. Foster, 14 September 2005", "subject": "Chocking of trailers at USPS facilities", "edition_or_date": "14 September 2005", "status_as_read": "Posted", "who_it_applies_to": "Employers using an alternative to chocks", "plain_english_requirement": "In light of changes in technology, OSHA will treat failure to use chocks as de minimis and will not cite it where alternative methods prevent truck movement. The letter names dock lock mechanisms, dock monitoring systems, and other systems that prevent unintended movement.", "names_wheel_chocks": "Yes", "text_itself_allows_a_restraint": "Yes", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2005-09-14", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "OSHA letter to Michael O. Foster, 14 September 2005", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A11", "jurisdiction": "US federal", "instrument_type": "Letter of interpretation", "citation": "OSHA letter to Robert M. Turner, 8 November 2005", "subject": "Chocking at docks with downward approaches", "edition_or_date": "8 November 2005", "status_as_read": "Posted; named as current guidance by the March 2011 letter", "who_it_applies_to": "Employers at docks with a downward approach", "plain_english_requirement": "FMCSA braking rules in 49 CFR 393 subpart C preempt OSHA's chocking requirements as applied to operators of commercial motor vehicles. If the trailer is not a CMV as defined at 49 U.S.C. 31132(1), OSHA enforces its chocking requirements regardless of the dock's downward approach.", "names_wheel_chocks": "Yes", "text_itself_allows_a_restraint": "Not addressed", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2005-11-08", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "OSHA letter to Robert M. Turner, 8 November 2005", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A12", "jurisdiction": "US federal", "instrument_type": "Letter of interpretation", "citation": "OSHA letter to Ron Cole, 7 March 2011", "subject": "OSHA and FMCSA authority over chocking at loading facilities", "edition_or_date": "7 March 2011", "status_as_read": "Posted; states it is current guidance together with the November 2005 letter", "who_it_applies_to": "Warehouses, manufacturers and other employers whose workers enter trailers", "plain_english_requirement": "FMCSA rules preempt OSHA chocking requirements for CMVs. Because FMCSA's parking brake rules do not reach vehicles that are not CMVs, and do not reach companies that do not own, operate or lease CMVs, OSHA is not preempted from requiring those companies to protect their own workers from trailer movement. The letter also withdraws a 4 March 1998 letter and a 1 April 1991 memorandum.", "names_wheel_chocks": "Yes", "text_itself_allows_a_restraint": "Not addressed directly", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "OSHA letter to Ron Cole, 7 March 2011", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A13", "jurisdiction": "US federal", "instrument_type": "Letter of interpretation", "citation": "OSHA letter to Margaret Irwin, 14 June 2011", "subject": "Enforcement of wheel chocking requirements in State Plan States", "edition_or_date": "14 June 2011", "status_as_read": "2011 interpretation verified; Washington discussion is historical, not a fresh state-law determination", "who_it_applies_to": "Employers operating in State Plan jurisdictions", "plain_english_requirement": "Written after a Washington State inspector cited a motor carrier at its own terminal yard for not chocking. OSHA states that its Section 4(b)(1) jurisdictional limits and the related case law are not directly applicable to the State Plans; that the 22 State Plans covering the private sector are not required to have an equivalent provision in their enabling legislation and may have different statutory language; that Washington did not have an equivalent provision in the case discussed; and that the matter must ultimately be resolved under State law.", "names_wheel_chocks": "Yes", "text_itself_allows_a_restraint": "Not addressed", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-06-14", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "OSHA letter to Margaret Irwin, 14 June 2011", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Historical Washington discussion is dated June 2011, not a current state-law determination. The current OSHA directory separately confirms 22 private-sector State Plans.", "additional_source_urls": null }, { "id": "A14", "jurisdiction": "US federal", "instrument_type": "Agency directory", "citation": "OSHA State Plans directory", "subject": "Approved State Plans and what they cover", "edition_or_date": "Current directory", "status_as_read": "Live", "who_it_applies_to": "Anyone checking which agency enforces at their site", "plain_english_requirement": "Lists the approved State Plans and their coverage. Use it to find the agency that actually enforces at a given facility.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.osha.gov/stateplans", "verified_date": "2026-09-17", "evidence_type": "Source-reported - directory linked for the reader; individual state rules were not surveyed for this build", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "OSHA State Plans directory", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A15", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "49 CFR 393.41(a)-(b)", "subject": "Parking brake system", "edition_or_date": "Current as read", "status_as_read": "In force", "who_it_applies_to": "Motor carriers operating commercial motor vehicles", "plain_english_requirement": "Section 393.41 sets parking-brake requirements by vehicle/brake type and manufacture date. Its applicable performance clauses address loading conditions on a public road free of ice and snow. Paragraph (b) excludes specified air-braked trailer categories from its parking-brake requirement and requires agricultural commodity, heavy hauler and pulpwood trailers to carry enough chocking blocks to prevent movement when parked.", "names_wheel_chocks": "Yes - for three trailer types", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-C/section-393.41", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "393.41(a), (b), (c)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "The ice/snow language is a brake-performance condition, not a test that switches OSHA/FMCSA jurisdiction with the weather. The chocking-block requirement in (b) is a parking-brake provision, not an alternative mandated by the rear-guard exclusion.", "additional_source_urls": null }, { "id": "A16", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "49 CFR 393.86(a)(1)", "subject": "Rear impact guards - trailers built on or after 26 January 1998", "edition_or_date": "Last amended 91 FR 7877, 19 February 2026", "status_as_read": "In force", "who_it_applies_to": "Motor carriers", "plain_english_requirement": "A trailer or semitrailer with a GVWR of 4,536 kg (10,000 lb) or more built on or after 26 January 1998 must have a rear impact guard meeting FMVSS No. 223 as in effect when the vehicle was built, installed so the vehicle meets FMVSS No. 224. Pole trailers, pulpwood trailers, low chassis vehicles, special purpose vehicles, wheels back vehicles, road construction controlled horizontal discharge trailers and driveaway-towaway trailers are excluded.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable - this is the bar a hook restraint grabs", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "49 CFR 393.86(a)(1)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A17", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "49 CFR 393.86(a)(2)-(a)(5)", "subject": "Rear impact guard dimensions", "edition_or_date": "Last amended 91 FR 7877, 19 February 2026", "status_as_read": "In force", "who_it_applies_to": "Motor carriers", "plain_english_requirement": "For covered trailers: side reach within 100 mm (4 in), without projecting beyond the sides; bottom clearance no more than 560 mm (22 in); rear-surface position within 305 mm (12 in) of the vehicle rear at the specified reference; cross-sectional vertical height at least 100 mm (3.94 in). Paragraphs (a)(3) and (a)(4) allow specified rounded/curved-end departures within 255 mm (10 in) of the sides. These clauses specify no minimum ground clearance; that is not a legal zero-height limit or a complete fit determination.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "49 CFR 393.86(a)(2)-(a)(5)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A18", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "49 CFR 393.86(b)(1)-(b)(3)", "subject": "Rear end protection - vehicles built after 31 December 1952", "edition_or_date": "Last amended 91 FR 7877, 19 February 2026", "status_as_read": "In force", "who_it_applies_to": "Motor carriers", "plain_english_requirement": "Vehicles built after 31 December 1952 that are not post-1998 trailers, and whose rear bottom edge sits more than 76.2 cm (30 in) above the ground when empty, need a rear impact guard whose bottom is no more than 30 in above the ground, no more than 61 cm (24 in) forward of the rear, and within 45.7 cm (18 in) of each side. Low chassis, special purpose and wheels back vehicles may rely on their own body or chassis instead where it gives comparable protection.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "49 CFR 393.86(b)(1)-(b)(3)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Apply the exceptions in (b)(1) and the equivalent-protection provision in (b)(3); this is not every pre-1998 vehicle.", "additional_source_urls": null }, { "id": "A19", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "49 CFR 393.86(a)(6)", "subject": "Rear impact guard certification label", "edition_or_date": "Rescinded by 91 FR 7874, effective 23 March 2026", "status_as_read": "Rescinded - shown as [Reserved]", "who_it_applies_to": "Motor carriers", "plain_english_requirement": "The FMCSR requirement that the guard carry a permanent manufacturer certification label was rescinded effective 23 March 2026, along with a related guidance document. The labelling duty FMVSS No. 223 S5.3 places on guard manufacturers is unaffected.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.govinfo.gov/content/pkg/FR-2026-02-19/pdf/2026-03255.pdf", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "49 CFR 393.86(a)(6)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A20", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "49 CFR 571.223 S5.2.1", "subject": "FMVSS No. 223 guard strength", "edition_or_date": "Last amended 87 FR 42366, 15 July 2022", "status_as_read": "In force", "who_it_applies_to": "Rear impact guard manufacturers", "plain_english_requirement": "The guard must resist 50,000 N at test point P1, 50,000 N at P2, and a uniform distributed force of at least 350,000 N across the horizontal member, in each case without deflecting more than 125 mm and without eliminating any load path that existed before the test.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-V/part-571/subpart-B/section-571.223", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "49 CFR 571.223 S5.2.1", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": "https://www.govinfo.gov/content/pkg/FR-2022-07-15/html/2022-14330.htm" }, { "id": "A21", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "49 CFR 571.223 S5.2.2", "subject": "FMVSS No. 223 guard energy absorption", "edition_or_date": "Last amended 87 FR 42366, 15 July 2022", "status_as_read": "In force", "who_it_applies_to": "Rear impact guard manufacturers", "plain_english_requirement": "For guards other than hydraulic guards or guards installed on tanker trailers, S5.2.2(a) requires at least 20,000 J absorbed in the first 125 mm of distributed-load deflection without eliminating a load path, with ground clearance at each support no greater than 560 mm after the test. Under S5.2.2(b), resistance greater than 700,000 N can replace that energy-absorption requirement, but the specified post-test clearance remains.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-V/part-571/subpart-B/section-571.223", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "49 CFR 571.223 S5.2.2", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": "https://www.govinfo.gov/content/pkg/FR-2022-07-15/html/2022-14330.htm" }, { "id": "A22", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "49 CFR 571.223 S6.6(a)", "subject": "FMVSS No. 223 direction of the test force", "edition_or_date": "Last amended 87 FR 42366, 15 July 2022", "status_as_read": "In force", "who_it_applies_to": "Rear impact guard manufacturers and NHTSA compliance testing", "plain_english_requirement": "Force is applied to the guard in a forward direction - toward the front of the trailer, the direction a car strikes it in an underride crash.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-V/part-571/subpart-B/section-571.223", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "49 CFR 571.223 S6.6(a)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A23", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "Appendix A to 49 CFR Part 396, item 15.a", "subject": "Annual inspection - trailers built on or after 26 January 1998", "edition_or_date": "Added by 86 FR 62105, effective 9 December 2021", "status_as_read": "In force", "who_it_applies_to": "Trailers/semitrailers within item 15.a scope and exclusions; appendix prints 4,536 kg (10,001 lb), while 393.86(a)(1) prints the same kg as 10,000 lb.", "plain_english_requirement": "A post-1998 trailer fails if the guard is missing; is not securely attached (broken or missing fasteners, cracked welds or parent metal, other damage compromising attachment); does not reach within 100 mm (4 in) of each side extremity or reaches past it; sits more than 560 mm (22 in) above the ground; is more than 305 mm (12 in) forward of the rear extremity; or has a cross-sectional vertical height under 100 mm (4 in) across its whole width.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/appendix-Appendix%20A%20to%20Part%20396", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "Appendix A to 49 CFR Part 396, item 15.a", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Do not infer a one-pound exemption from differing parenthetical conversions. Item 15.a and 15.b cover different populations; neither is a relaxed damage allowance.", "additional_source_urls": null }, { "id": "A24", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "Appendix A to 49 CFR Part 396, item 15.b", "subject": "Annual inspection - other CMVs built after 31 December 1952", "edition_or_date": "Added by 86 FR 62105, effective 9 December 2021", "status_as_read": "In force", "who_it_applies_to": "Motor carriers performing the annual inspection", "plain_english_requirement": "Other covered CMVs fail if the guard is missing; is not securely attached by bolts, welding or comparable means; sits more than 762 mm (30 in) above the ground; does not reach within 457 mm (18 in) of each side extremity; or is more than 610 mm (24 in) forward of the rear extremity.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/appendix-Appendix%20A%20to%20Part%20396", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "Appendix A to 49 CFR Part 396, item 15.b", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A25", "jurisdiction": "US federal", "instrument_type": "Regulation", "citation": "49 CFR 396.3(a)(1) and 49 CFR 396.17", "subject": "Maintenance and annual inspection duty", "edition_or_date": "Current as read", "status_as_read": "In force", "who_it_applies_to": "Motor carriers", "plain_english_requirement": "Parts and accessories, rear impact guards included, must be in safe and proper operating condition at all times, and every CMV must be inspected at least once every 12 months.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/section-396.3", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "49 CFR 396.3(a)(1) and 49 CFR 396.17", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/section-396.17" }, { "id": "A26", "jurisdiction": "Voluntary standard", "instrument_type": "Industry standard", "citation": "ANSI MH30.3, Vehicle Restraining Devices: Performance and Testing", "subject": "Restraint design, testing and owner duties", "edition_or_date": "2015 public preview; 2022 edition listed by MHI and ANSI", "status_as_read": "Voluntary consensus standard; adoption or contracts can affect applicability", "who_it_applies_to": "Manufacturers, owners and users within the standard scope; legal applicability requires a separate check", "plain_english_requirement": "The public scope describes RIG-dependent and wheel-dependent devices intended to limit creep and prevent unscheduled departure; manual or powered actuation is a separate distinction. The preview contents list separate structural-test and owner/user topics. Those headings do not establish the text of the inaccessible clauses.", "names_wheel_chocks": "Scope includes wheel-dependent restraining devices; not every object called a chock has the same application", "text_itself_allows_a_restraint": "Yes - restraints are its subject", "source_url": "https://webstore.ansi.org/preview-pages/MHIA/preview_ANSI%2BMH30.3-2015.pdf", "verified_date": "2026-09-17", "evidence_type": "Source-reported - published preview only; the paid clause text was not read", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "2015 preview: foreword, scope 1.1-1.2 and contents; current edition: MHI/ANSI listing", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Full 2015 and 2022 standards were not reviewed. No certification, professional-engineer duty or paid-clause text is inferred from a contents heading.", "additional_source_urls": "https://og.mhi.org/lodem | https://webstore.ansi.org/standards/mhia/ansimh302022-2488394" }, { "id": "A27", "jurisdiction": "Voluntary standard", "instrument_type": "Industry standard", "citation": "SAE J348_202010, Wheel Chocks", "subject": "Chock design and manufacture", "edition_or_date": "J348_202010, stabilized 19 October 2020; revised 26 June 1990; issued 1 July 1968", "status_as_read": "Publisher lists stabilized recommended practice", "who_it_applies_to": "Chock makers who choose to follow it", "plain_english_requirement": "The publicly accessible scope concerns basic information for designing and manufacturing a wheel chock. The cited OSHA dock provisions do not name J348. The paid document was not reviewed, so its scope alone is not used to infer a test method or prove the absence of performance requirements.", "names_wheel_chocks": "Yes", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://saemobilus.sae.org/standards/j348_202010-wheel-chocks", "verified_date": "2026-09-17", "evidence_type": "Source-reported - scope statement from the publisher listing; full text not read", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "SAE J348_202010, Wheel Chocks", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Stabilized is not revised. No claim of full-text access or universal legal adoption.", "additional_source_urls": null }, { "id": "A28", "jurisdiction": "California", "instrument_type": "State regulation", "citation": "8 CCR 3650(t)(22)", "subject": "Industrial trucks - general operating rules", "edition_or_date": "Current as read", "status_as_read": "In force", "who_it_applies_to": "California employers", "plain_english_requirement": "Vehicles must not be driven in and out of highway trucks and trailers at loading docks until those trucks or trailers are securely blocked or restrained and the brakes are set.", "names_wheel_chocks": "No - says 'blocked'", "text_itself_allows_a_restraint": "Yes - the rule text itself says 'blocked or restrained'", "source_url": "https://www.dir.ca.gov/title8/3650.html", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "8 CCR 3650(t)(22)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A29", "jurisdiction": "California", "instrument_type": "State regulation", "citation": "8 CCR 3650(j)", "subject": "Industrial trucks - uncoupled trailers", "edition_or_date": "Current as read", "status_as_read": "In force", "who_it_applies_to": "California employers", "plain_english_requirement": "Trailers disconnected from their tractor must be secured against up-ending during loading or unloading, which may require auxiliary jacks designed for that purpose.", "names_wheel_chocks": "No", "text_itself_allows_a_restraint": "Not applicable", "source_url": "https://www.dir.ca.gov/title8/3650.html", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "8 CCR 3650(j)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null }, { "id": "A30", "jurisdiction": "California", "instrument_type": "State regulation", "citation": "8 CCR 3650(t)(23)", "subject": "Industrial trucks - railroad cars", "edition_or_date": "Current as read", "status_as_read": "In force", "who_it_applies_to": "California employers", "plain_english_requirement": "For the rail-loading situation covered by 3650(t)(23), the rule addresses railcar brakes, wheel chocks or other recognized positive stops, and blue stop signals; retain the paragraph-specific conditions and exceptions.", "names_wheel_chocks": "Yes", "text_itself_allows_a_restraint": "Yes - 'or other recognized positive stops'", "source_url": "https://www.dir.ca.gov/title8/3650.html", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source required", "publish_status": "Publishable within stated scope", "source_locator": "8 CCR 3650(t)(23)", "verification_method": "Issuer text via live browsing; OSHA text sometimes via issuer search extract", "scope_note": "Read with the applicable employer, vehicle, operation and jurisdiction; this row is not a facility-specific compliance determination.", "additional_source_urls": null } ], "policy-timeline": [ { "seq": 1, "date": "1952-05-15", "document": "ICC Bureau of Motor Carriers rear-end protection rule (17 FR 4445)", "doc_type": "Regulation", "issuer": "Interstate Commerce Commission", "what_it_did": "First federal rear underride requirement: vehicles built after 31 December 1952 need a rear-end protection device no more than 30 in above the ground, no more than 24 in forward of the rear, reaching within 18 in of each side. This is where the phrase 'ICC bar' comes from.", "status_as_read": "Superseded in part by later rules", "source_url": "https://www.federalregister.gov/documents/2021/11/09/2021-23796/parts-and-accessories-necessary-for-safe-operation-rear-impact-guards-and-rear-impact-protection", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "ICC Bureau of Motor Carriers rear-end protection rule (17 FR 4445)", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 2, "date": "1971", "document": "29 CFR 1910.178(k)(1) and (m)(7)", "doc_type": "Regulation", "issuer": "OSHA", "what_it_did": "OSHA's powered industrial truck standard requires brakes set and wheel chocks or wheel blocks at the dock. The highway-truck sentence names chocks and nothing else; the railroad-car sentence in the same paragraph allows 'other recognized positive protection'.", "status_as_read": "In force", "source_url": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.178", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "29 CFR 1910.178(k)(1) and (m)(7)", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 3, "date": "1978", "document": "OSHA Instruction STD 1-11.5", "doc_type": "Enforcement directive", "issuer": "OSHA", "what_it_did": "After a Review Commission decision, OSHA instructed that 49 CFR 392.20, then in force, preempted its chocking standards for commercial motor vehicles.", "status_as_read": "Rescinded in 1999", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "OSHA Instruction STD 1-11.5", "scope_note": "OSHA March 2011 history says 30 October 1978; the 1981 directive reference names 31 January 1978. Conflicting dates are retained rather than resolved by assumption.", "additional_source_urls": "https://www.osha.gov/enforcement/directives/std-01-11-007" }, { "seq": 4, "date": "1981-08-05", "document": "OSHA Instruction STD 1-11.7, now STD 01-11-007", "doc_type": "Enforcement directive", "issuer": "OSHA", "what_it_did": "Allowed a positive mechanical means securing the trailer to the dock in place of chocks, treated as a de minimis violation, on three conditions.", "status_as_read": "Mechanical-restraint alternative; read with later OSHA interpretations and the relevant jurisdiction", "source_url": "https://www.osha.gov/enforcement/directives/std-01-11-007", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "F.1-F.3", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 5, "date": "1991-04-01", "document": "OSHA memorandum (Southwest Transportation)", "doc_type": "Internal memorandum", "issuer": "OSHA", "what_it_did": "Stated OSHA had authority over all actions associated with loading and unloading vehicles at destination points.", "status_as_read": "Withdrawn - OSHA's 2011 letter says it does not reflect current interpretations", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "OSHA memorandum (Southwest Transportation)", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 6, "date": "1996-01-24", "document": "FMVSS Nos. 223 and 224 created (61 FR 2004)", "doc_type": "Regulation", "issuer": "NHTSA", "what_it_did": "Created the modern rear impact guard standards, applying to most trailers and semitrailers of 4,536 kg (10,000 lb) GVWR or more built on or after 26 January 1998.", "status_as_read": "In force as amended", "source_url": "https://www.federalregister.gov/documents/2021/11/09/2021-23796/parts-and-accessories-necessary-for-safe-operation-rear-impact-guards-and-rear-impact-protection", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "FMVSS Nos. 223 and 224 created (61 FR 2004)", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 7, "date": "1996-02-09", "document": "OSHA letter of interpretation", "doc_type": "Letter of interpretation", "issuer": "OSHA", "what_it_did": "Clarified that 'rear wheels' in 1910.178(k)(1) is satisfied by enough chocks under the rear trailer wheels to prevent unintended movement.", "status_as_read": "Posted", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/1996-02-09", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "OSHA letter of interpretation", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 8, "date": "1998-03-04", "document": "OSHA letter to Peter Blumenthal", "doc_type": "Letter of interpretation", "issuer": "OSHA", "what_it_did": "Stated that CMV trailers must be chocked under 1910.178(k)(1) and (m)(7).", "status_as_read": "Withdrawn - OSHA's 2011 letter says it does not reflect current interpretations", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "OSHA letter to Peter Blumenthal", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 9, "date": "1998", "document": "Revocation of 49 CFR 392.20", "doc_type": "Regulation", "issuer": "Office of Motor Carrier Safety", "what_it_did": "Revoked the DOT rule OSHA's 1978 directive had relied on for preemption.", "status_as_read": "Revoked", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "Revocation of 49 CFR 392.20", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 10, "date": "1999-10-19", "document": "OSHA CPL 2-1.30, now CPL 02-01-030", "doc_type": "Enforcement directive", "issuer": "OSHA", "what_it_did": "Rescinded STD 1-11.5 and declared OSHA's chocking requirements no longer preempted for CMVs, apart from specific vehicle types still covered by DOT chocking rules. Its Federal Program Change section tells State Plans they are expected to have equivalent enforcement policies.", "status_as_read": "Superseded on the preemption question by the 2001 FMCSA position and the 2005 and 2011 letters", "source_url": "https://www.osha.gov/laws-regs/interlinking/standards/1910.178%28k%29%281%29/directives", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "OSHA CPL 2-1.30, now CPL 02-01-030", "scope_note": "OSHA directive index says 19 October; March 2011 narrative says 1 October. Date conflict retained. Policy history is described in the 2011 interpretations.", "additional_source_urls": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07 | https://www.osha.gov/laws-regs/standardinterpretations/2011-06-14" }, { "seq": 11, "date": "2001-03-30", "document": "FMCSA letter to OSHA", "doc_type": "Agency correspondence", "issuer": "FMCSA", "what_it_did": "Told OSHA that 49 CFR 393.41(a), which requires both the availability and the use of a parking brake system, preempts OSHA's chocking requirements for CMVs.", "status_as_read": "Described in OSHA's 2011 letter; the FMCSA letter itself was not read for this build", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "FMCSA letter to OSHA", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 12, "date": "2005-09-14", "document": "OSHA letter to Michael O. Foster", "doc_type": "Letter of interpretation", "issuer": "OSHA", "what_it_did": "Restated the de minimis policy and named dock lock mechanisms, dock monitoring systems and other systems that prevent unintended movement as acceptable alternatives to chocks.", "status_as_read": "Posted", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2005-09-14", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "OSHA letter to Michael O. Foster", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 13, "date": "2005-11-08", "document": "OSHA letter to Robert M. Turner", "doc_type": "Letter of interpretation", "issuer": "OSHA", "what_it_did": "Held that FMCSA braking rules preempt OSHA chocking enforcement as applied to operators of commercial motor vehicles; if the trailer is not a CMV, OSHA enforces chocking even at a dock with a downward approach.", "status_as_read": "Posted; named as current guidance in 2011", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2005-11-08", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "OSHA letter to Robert M. Turner", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 14, "date": "2011-03-07", "document": "OSHA letter to Ron Cole", "doc_type": "Letter of interpretation", "issuer": "OSHA", "what_it_did": "Set out the whole chain, withdrew the 1998 letter and the 1991 memorandum, and held that OSHA is not preempted for vehicles that are not CMVs or for companies that do not own, operate or lease CMVs.", "status_as_read": "Posted; states it is current guidance with the November 2005 letter", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "OSHA letter to Ron Cole", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 15, "date": "2011-06-14", "document": "OSHA letter to Margaret Irwin, American Trucking Associations", "doc_type": "Letter of interpretation", "issuer": "OSHA", "what_it_did": "Written after a Washington State inspector cited a motor carrier at its own terminal yard for not chocking. States that OSHA's Section 4(b)(1) jurisdictional limits are not directly applicable to the State Plans, that the 22 State Plans covering the private sector are not required to have an equivalent provision and may have different statutory language, that Washington did not have one in the case discussed, and that the matter must be resolved under State law.", "status_as_read": "Posted", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-06-14", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "OSHA letter to Margaret Irwin, American Trucking Associations", "scope_note": "Historical Washington discussion, not current Washington-law verification. Current federal directory separately confirms 22 private-sector State Plans.", "additional_source_urls": null }, { "seq": 16, "date": "2016-11-18", "document": "Walking-working surfaces final rule (81 FR 82990) creating 29 CFR 1910.26", "doc_type": "Regulation", "issuer": "OSHA", "what_it_did": "The 2016 walking-working-surfaces final rule supplies the present 1910.26 dockboard text, including paragraph (d): measures such as wheel chocks or sand shoes to prevent transport-vehicle movement while employees are on the dockboard.", "status_as_read": "In force", "source_url": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.26", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "Walking-working surfaces final rule (81 FR 82990) creating 29 CFR 1910.26", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 17, "date": "2021-11-09", "document": "FMCSA final rule 86 FR 62105, effective 9 December 2021", "doc_type": "Regulation", "issuer": "FMCSA", "what_it_did": "Added rear impact guards to the annual inspection list at Appendix A to Part 396 with pass/fail criteria, and excluded road construction controlled horizontal discharge trailers from the guard requirement.", "status_as_read": "In force", "source_url": "https://www.federalregister.gov/documents/2021/11/09/2021-23796/parts-and-accessories-necessary-for-safe-operation-rear-impact-guards-and-rear-impact-protection", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "FMCSA final rule 86 FR 62105, effective 9 December 2021", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null }, { "seq": 18, "date": "2022-07-15", "document": "NHTSA 15 July 2022 final rule; 87 FR 42339, amendatory text at 42366", "doc_type": "Regulation", "issuer": "NHTSA", "what_it_did": "Amended FMVSS 223 strength and energy-absorption provisions. Current S5.2.1 specifies 50,000 N at P1 and P2 and at least 350,000 N distributed loading; S5.2.2 specifies conditional 20,000 J absorption and an alternative greater-than-700,000 N route.", "status_as_read": "Effective 11 January 2023; compliance date 15 July 2024; optional early compliance permitted", "source_url": "https://www.govinfo.gov/content/pkg/FR-2022-07-15/html/2022-14330.htm", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "87 FR 42339 DATES; background at 42345; amendatory text at 42366; lead-time discussion", "scope_note": "The earlier P3 point load was 100,000 N; non-hydraulic guards had a 5,650 J energy requirement at P3. These are historical requirements described in the 2022 final-rule background, not universal current values. The applicable edition/transition must be checked for the actual guard and vehicle.", "additional_source_urls": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-V/part-571/subpart-B/section-571.223" }, { "seq": 19, "date": "2026-02-19", "document": "FMCSA final rule 91 FR 7874, effective 23 March 2026", "doc_type": "Regulation", "issuer": "FMCSA", "what_it_did": "Rescinded 49 CFR 393.86(a)(6), the requirement that a rear impact guard carry a permanent certification label, and rescinded the related guidance document. FMVSS No. 223 S5.3 labelling by guard manufacturers is unaffected.", "status_as_read": "In force", "source_url": "https://www.govinfo.gov/content/pkg/FR-2026-02-19/pdf/2026-03255.pdf", "verified_date": "2026-09-17", "claim_type": "Primary-source required", "evidence_type": "Source-reported", "publish_status": "Publishable as a scoped historical record", "source_locator": "FMCSA final rule 91 FR 7874, effective 23 March 2026", "scope_note": "Historical record; not every entry is current operating guidance.", "additional_source_urls": null } ], "restraint-specs": [ { "manufacturer": "Blue Giant", "model": "StrongArm RVR303", "device_family": "RIG restraint", "engagement_method": "Recessed rotating hook", "power_type": "Electric-hydraulic", "published_restraining_force_lb": 35000, "force_wording_as_published": "applies 35,000 lb (15,876 kg) of restraining force", "vertical_window_low_in": 8, "vertical_window_high_in": 30, "vertical_window_span_in": 22, "horizontal_reach_in": 14, "stated_min_contact_height_in": null, "nameplate_or_certification_note": "Illustrated nameplate: TEST LOAD 22,500 lb and ANSI CODE MH30.3-2005; not a test report or a new standard-wide minimum.", "source_document": "StrongArm RVR303 Owner's Manual 038-953E Rev.1.8", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "document_date": "13 March 2026", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R01", "force_qualifier": "manufacturer-stated capacity", "scope_note": "Manual cover: starts March 2016, serial 411892. The manual pairs 14 in reach with 381 mm; those units conflict (14 in is 355.6 mm). Inch figure retained as printed; confirm actual reach with manufacturer before design.", "source_locator": "p.4 capacity/geometry; p.20 section 9.0 example nameplate", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Blue Giant", "model": "StrongArm SVR303", "device_family": "RIG restraint", "engagement_method": "Rotating hook, low profile", "power_type": "Hydraulic", "published_restraining_force_lb": 35000, "force_wording_as_published": "uses 35,000 lb of restraining force", "vertical_window_low_in": 8, "vertical_window_high_in": 26, "vertical_window_span_in": 18, "horizontal_reach_in": 13, "stated_min_contact_height_in": 4, "nameplate_or_certification_note": null, "source_document": "StrongArm SVR303 product page", "source_url": "https://www.bluegiant.com/products/dock-equipment/vehicle-restraints/hydraulic/strongarm-svr303/", "document_date": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R02", "force_qualifier": "manufacturer-stated capacity", "scope_note": "Named model and cited document only; no independent cross-brand performance test.", "source_locator": "Technical specifications: capture range and minimum contact space", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Blue Giant", "model": "StrongArm TL85", "device_family": "RIG restraint", "engagement_method": "Swing-up barrier arm", "power_type": "Hydraulic", "published_restraining_force_lb": 32000, "force_wording_as_published": "a restraining force of 32,000 lb", "vertical_window_low_in": 12, "vertical_window_high_in": 26, "vertical_window_span_in": 14, "horizontal_reach_in": 12, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "StrongArm TL85 product page", "source_url": "https://www.bluegiant.com/products/dock-equipment/vehicle-restraints/hydraulic/strongarm-tl85/", "document_date": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R03", "force_qualifier": "manufacturer-stated capacity", "scope_note": "Named model and cited document only; no independent cross-brand performance test.", "source_locator": "Product specifications / features", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Blue Giant", "model": "StrongArm HVR303", "device_family": "RIG restraint", "engagement_method": "Electro-mechanical hook", "power_type": "Electric", "published_restraining_force_lb": 32000, "force_wording_as_published": "32,000 lb restraining capacity", "vertical_window_low_in": 9, "vertical_window_high_in": 26, "vertical_window_span_in": 17, "horizontal_reach_in": null, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "StrongArm HVR303 product page", "source_url": "https://www.bluegiant.com/en/products/dock-equipment/vehicle-restraints/electric/strongarm-hvr303/", "document_date": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R04", "force_qualifier": "manufacturer-stated capacity", "scope_note": "Current issuer page gives 9-26 in capture range and also describes 16 in float. The arithmetic endpoint span is not a correction to or substitute for travel; confirm the exact installed configuration.", "source_locator": "Product specifications / features", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Blue Giant", "model": "StrongArm ML10", "device_family": "RIG restraint", "engagement_method": "Manual barrier arm", "power_type": "Manual", "published_restraining_force_lb": 30000, "force_wording_as_published": "restraining power 30,000 lb", "vertical_window_low_in": 11, "vertical_window_high_in": 26, "vertical_window_span_in": 15, "horizontal_reach_in": 13, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "StrongArm ML10 product page", "source_url": "https://www.bluegiant.com/en/products/dock-equipment/vehicle-restraints/mechanical/strongarm-ml10/", "document_date": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R05", "force_qualifier": "manufacturer-stated capacity", "scope_note": "Named model and cited document only; no independent cross-brand performance test.", "source_locator": "Technical specifications: 30,000 lb; 11-26 in; 13 in", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Rite-Hite", "model": "Dok-Lok VBR-100", "device_family": "RIG restraint", "engagement_method": "Vertical barrier, wall mounted", "power_type": "Mechanical, manual activation", "published_restraining_force_lb": 32000, "force_wording_as_published": "32,000 lbs. of pull-out force", "vertical_window_low_in": 12, "vertical_window_high_in": 30, "vertical_window_span_in": 18, "horizontal_reach_in": null, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "VBR-100 product page", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/vertical-barrier-restraints/wall-mounted", "document_date": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R06", "force_qualifier": "manufacturer-stated pull-out figure", "scope_note": "Named model and cited document only; no independent cross-brand performance test.", "source_locator": "Pull-Out Force Benchmarks; specifications", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Rite-Hite", "model": "Dok-Lok SHR-5000", "device_family": "RIG restraint", "engagement_method": "Rotating shadow hook", "power_type": "Powered", "published_restraining_force_lb": null, "force_wording_as_published": "Not reported in the cited source", "vertical_window_low_in": 9, "vertical_window_high_in": 30, "vertical_window_span_in": 21, "horizontal_reach_in": null, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "Rite-Hite issuer news release for SHR-5000", "source_url": "https://www.ritehite.com/en/am/news/2015/news/ritehite-doklok-universal-restraint-meets-evolving-needs", "document_date": "2015; historical source", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R07", "force_qualifier": "not reported in the cited source", "scope_note": "Historical model included for documentation; this row does not claim current sale or availability.", "source_locator": "Published 9-30 in range", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Rite-Hite", "model": "Dok-Lok SHR-5100", "device_family": "RIG restraint", "engagement_method": "Third-generation rotating hook", "power_type": "Powered", "published_restraining_force_lb": 32000, "force_wording_as_published": "32,000 lbs. of pull-out force", "vertical_window_low_in": 9, "vertical_window_high_in": 30, "vertical_window_span_in": 21, "horizontal_reach_in": null, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "SHR-5100 product page", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/original-rotating-hook-restraints/shadow-hook-restraint", "document_date": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R08", "force_qualifier": "manufacturer-stated pull-out figure", "scope_note": "9 or 12 in low-profile carriage options are described. The 9 in option carries the cited dual-articulating nose; application/configuration still needs confirmation.", "source_locator": "9-30 in range; Pull-Out Force Benchmarks", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Rite-Hite", "model": "GWC-1000 Global Wheel Chock", "device_family": "Wheel dependent", "engagement_method": "Manually positioned chock against the tire", "power_type": "Manual placement, powered sensing", "published_restraining_force_lb": null, "force_wording_as_published": "Not reported in the cited source", "vertical_window_low_in": null, "vertical_window_high_in": null, "vertical_window_span_in": null, "horizontal_reach_in": null, "stated_min_contact_height_in": null, "nameplate_or_certification_note": "Manufacturer states it is certified to meet and exceed ANSI MH30.3 performance testing standards", "source_document": "GWC-1000 Global Wheel Chock product page", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/wheel-based-restraints/global-wheel-chock", "document_date": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R09", "force_qualifier": "not reported in the cited source", "scope_note": "Wheel-dependent, manually positioned, monitored device; RIG height window is not applicable. Manufacturer standard-conformity claim is not independently certified in this audit.", "source_locator": "Design, communication and application survey; manufacturer standard claim", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Pentalift", "model": "RVR32", "device_family": "RIG restraint", "engagement_method": "Raised rotating steel hook", "power_type": "Hydraulic", "published_restraining_force_lb": 32000, "force_wording_as_published": "32,000 lb restraining capacity", "vertical_window_low_in": 9, "vertical_window_high_in": 25, "vertical_window_span_in": 16, "horizontal_reach_in": null, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "RVR32 brochure, footer 0121D050", "source_url": "https://www.pentalift.com/wp-content/uploads/2021/04/RVR32-Brochure.pdf", "document_date": "Footer 0121D050; no publication date inferred from URL", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R10", "force_qualifier": "manufacturer-stated capacity", "scope_note": "Named model and cited document only; no independent cross-brand performance test.", "source_locator": "p.2 specifications", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Pentalift", "model": "MFRSA32", "device_family": "RIG restraint", "engagement_method": "Mechanical rotating arm", "power_type": "Manual T-handle", "published_restraining_force_lb": 32000, "force_wording_as_published": "32,000 lb restraining capacity", "vertical_window_low_in": 10.5, "vertical_window_high_in": 28.5, "vertical_window_span_in": 18, "horizontal_reach_in": null, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "MFRAL-Spec.pdf: sheet names model MFRSA32", "source_url": "https://www.pentalift.com/wp-content/uploads/2021/05/MFRAL-Spec.pdf", "document_date": "Undated specification", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R11", "force_qualifier": "manufacturer-stated capacity", "scope_note": "The source filename is not evidence that MFRSA32 and MFRAL32 are interchangeable models.", "source_locator": "p.2 Description and Dimensions", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Pentalift", "model": "UHR40", "device_family": "RIG restraint", "engagement_method": "Fully recessed hook", "power_type": "Electro-hydraulic", "published_restraining_force_lb": 40000, "force_wording_as_published": "40,000 lb restraining capacity", "vertical_window_low_in": 9, "vertical_window_high_in": 29, "vertical_window_span_in": 20, "horizontal_reach_in": null, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "UHR40 specification (UHRSpec.pdf)", "source_url": "https://www.pentalift.com/wp-content/uploads/2021/04/UHRSpec.pdf", "document_date": "Undated specification", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R12", "force_qualifier": "manufacturer-stated capacity", "scope_note": "Named model and cited document only; no independent cross-brand performance test.", "source_locator": "p.2 Description and Dimensions", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Poweramp", "model": "PowerHook", "device_family": "RIG restraint", "engagement_method": "Automatic hook", "power_type": "Hydraulic", "published_restraining_force_lb": 35000, "force_wording_as_published": "restraining force in excess of 35,000 lb", "vertical_window_low_in": 7, "vertical_window_high_in": 34, "vertical_window_span_in": 27, "horizontal_reach_in": 15, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "PowerHook manufacturer product page", "source_url": "https://www.poweramp.com/products/vehicle-restraints/powerhook-restraint", "document_date": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R13", "force_qualifier": "in excess of", "scope_note": "Named model and cited document only; no independent cross-brand performance test.", "source_locator": "Restraint force; service range 7-34 in; horizontal reach 0-15 in", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Poweramp", "model": "PowerStop (AAL)", "device_family": "RIG restraint", "engagement_method": "Low profile vertical arm", "power_type": "Hydraulic", "published_restraining_force_lb": 32000, "force_wording_as_published": "up to 32,000 lb of restraining force", "vertical_window_low_in": 12, "vertical_window_high_in": 29.5, "vertical_window_span_in": 17.5, "horizontal_reach_in": 10, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "PowerStop AAL manufacturer product page", "source_url": "https://www.poweramp.com/products/vehicle-restraints/powerstop-vehicle-restraint", "document_date": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R14", "force_qualifier": "up to", "scope_note": "Current issuer page uses up to, not in excess of. Qualifier retained; not averaged with lower-bound or unqualified figures.", "source_locator": "32,000 lb; service range 12-29.5 in and 0-10 in horizontally", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": null, "wheel_capture_high_in": null }, { "manufacturer": "Serco", "model": "SLSC SAFETY-CHOCK", "device_family": "Wheel dependent", "engagement_method": "Hydraulic surface-mounted wheel chocking arm", "power_type": "Hydraulic", "published_restraining_force_lb": null, "force_wording_as_published": "Not reported in the cited source", "vertical_window_low_in": null, "vertical_window_high_in": null, "vertical_window_span_in": null, "horizontal_reach_in": null, "stated_min_contact_height_in": null, "nameplate_or_certification_note": null, "source_document": "SAFETY-CHOCK Wheel Restraint Product Specifications", "source_url": "https://www.sercodockproducts.com/documents/products/trailer-restraints/wheel-chocking-systems/slsc-mounted-wheel-restraint/Serco%20Spec%20Sheet%20Safety-Chock%20Wheel%20Restraint.pdf", "document_date": "Form SPS-VWSM-0725", "verified_date": "2026-09-17", "evidence_type": "Source-reported inputs; calculated vertical_window_span_in", "id": "R15", "force_qualifier": "not reported in the cited source", "scope_note": "Issuer specifies rear-axle position 32 in to 14 ft from dock face, not a RIG engagement height or the hook horizontal-reach variable. High axle-position value 168 in is calculated as 14 x 12. No force value is reported in this sheet.", "source_locator": "p.2, sections 1, 3 and 5", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported", "wheel_capture_low_in": 32, "wheel_capture_high_in": 168 } ], "chock-ratings": [ { "brand": "Checkers", "model": "UCTS003", "material": "Polyurethane", "length_in": 10, "width_in": 8, "height_in": 6, "weight_lb": null, "published_rating_type": "Gross vehicle operating weight", "published_rating_value": "20,000 lb gross vehicle operating weight; slopes up to 11 percent", "max_tire_diameter_in": null, "published_grade_limit_pct": 11, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "Vehicle weight and selection conditions are not a measured pull-out force. Missing values mean not stated in this source, not unlimited capability.", "source_url": "https://checkers.justrite.com/utility-step-wheel-chock-ucts003", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C01", "record_type": "product", "document_edition": "Undated issuer product page, verified 2026-09-17", "source_locator": "Product description and specifications", "gross_vehicle_operating_weight_lb": 20000, "payload_capacity_as_reported": null, "guide_test_grade_pct": null, "quantity_condition": "Follow named-model instructions and application assessment", "scope_note": "Manufacturer rating for the named model and stated conditions; not an independently measured holding force.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "UC1400-6", "material": "Polyurethane", "length_in": 10, "width_in": 8.5, "height_in": 5, "weight_lb": null, "published_rating_type": "Gross vehicle operating weight", "published_rating_value": "60,000 lb gross vehicle operating weight", "max_tire_diameter_in": 32, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "Vehicle weight and selection conditions are not a measured pull-out force. Missing values mean not stated in this source, not unlimited capability.", "source_url": "https://checkers.justrite.com/uc1400-utility-wheel-chock-uc1400-6", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C02", "record_type": "product", "document_edition": "Undated issuer product page, verified 2026-09-17", "source_locator": "Product description and specifications", "gross_vehicle_operating_weight_lb": 60000, "payload_capacity_as_reported": null, "guide_test_grade_pct": null, "quantity_condition": null, "scope_note": "Manufacturer rating for the named model and stated conditions; not an independently measured holding force.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "UC1700", "material": "Polyurethane", "length_in": 8.5, "width_in": 7.5, "height_in": 6.25, "weight_lb": null, "published_rating_type": "Gross vehicle operating weight", "published_rating_value": "30,000 lb gross vehicle operating weight", "max_tire_diameter_in": 35, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "Vehicle weight and selection conditions are not a measured pull-out force. Missing values mean not stated in this source, not unlimited capability.", "source_url": "https://checkers.justrite.com/uc1700-utility-wheel-chock", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C03", "record_type": "product", "document_edition": "Undated issuer product page, verified 2026-09-17", "source_locator": "Product description and specifications", "gross_vehicle_operating_weight_lb": 30000, "payload_capacity_as_reported": null, "guide_test_grade_pct": null, "quantity_condition": null, "scope_note": "Manufacturer rating for the named model and stated conditions; not an independently measured holding force.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "MC3009", "material": "High-density polyethylene (HDPE)", "length_in": 14.5, "width_in": 14.5, "height_in": 11, "weight_lb": null, "published_rating_type": "Gross vehicle operating weight", "published_rating_value": "245,000 lb gross vehicle operating weight", "max_tire_diameter_in": 65, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "Vehicle weight and selection conditions are not a measured pull-out force. Missing values mean not stated in this source, not unlimited capability.", "source_url": "https://checkers.justrite.com/heavy-duty-wheel-chock-mc3009", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C04", "record_type": "product", "document_edition": "Undated issuer product page, verified 2026-09-17", "source_locator": "Product description and specifications", "gross_vehicle_operating_weight_lb": 245000, "payload_capacity_as_reported": "Up to 70 tons payload capacity; not a conversion of gross vehicle weight", "guide_test_grade_pct": null, "quantity_condition": null, "scope_note": "Manufacturer rating for the named model and stated conditions; not an independently measured holding force.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "MC3011", "material": "High-density polyethylene (HDPE)", "length_in": 24, "width_in": 14, "height_in": 15.25, "weight_lb": 32, "published_rating_type": "Gross vehicle operating weight", "published_rating_value": "1,600,000 lb gross vehicle operating weight", "max_tire_diameter_in": 165, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "Vehicle weight and selection conditions are not a measured pull-out force. Missing values mean not stated in this source, not unlimited capability.", "source_url": "https://checkers.justrite.com/heavy-duty-wheel-chock-mc3011", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C05", "record_type": "product", "document_edition": "Undated issuer product page, verified 2026-09-17", "source_locator": "Product description and specifications", "gross_vehicle_operating_weight_lb": 1600000, "payload_capacity_as_reported": "Up to 400 tons payload capacity; not a conversion of gross vehicle weight", "guide_test_grade_pct": null, "quantity_condition": "Manufacturer specifies a minimum of four chocks for gross vehicle operating weights from 855,000 to 1,600,000 lb", "scope_note": "Manufacturer rating for the named model and stated conditions; not an independently measured holding force.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "RC815", "material": "Rubber", "length_in": 10.5, "width_in": 7.5, "height_in": 5.5, "weight_lb": null, "published_rating_type": "No gross-vehicle-weight rating stated on the cited product page", "published_rating_value": null, "max_tire_diameter_in": null, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "Vehicle weight and selection conditions are not a measured pull-out force. Missing values mean not stated in this source, not unlimited capability.", "source_url": "https://checkers.justrite.com/general-purpose-rubber-wheel-chock-rc815", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C06", "record_type": "product", "document_edition": "Undated issuer product page, verified 2026-09-17", "source_locator": "Product description and specifications", "gross_vehicle_operating_weight_lb": null, "payload_capacity_as_reported": null, "guide_test_grade_pct": null, "quantity_condition": null, "scope_note": "Manufacturer rating for the named model and stated conditions; not an independently measured holding force.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "Selection guide band 1", "material": null, "length_in": null, "width_in": null, "height_in": null, "weight_lb": null, "published_rating_type": "Gross vehicle operating weight band", "published_rating_value": "Up to 30,000 lb gross vehicle operating weight", "max_tire_diameter_in": null, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "This band alone does not identify a suitable model. Use the complete manufacturer guide with tire diameter, conditions and the specified application validation.", "source_url": "https://checkers.justrite.com/mpattachments/file/viewonline/id/569/product_id/32604/", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C07", "record_type": "selected_guide_weight_band", "document_edition": "Checkers Wheel Chock Reference Guide CK407r1-guide(0325), copyright 2025", "source_locator": "Six selected weight-band headings; 8 percent grade test-basis note", "gross_vehicle_operating_weight_lb": 30000, "payload_capacity_as_reported": null, "guide_test_grade_pct": 8, "quantity_condition": null, "scope_note": "Selected guide band, not a product, not the complete chart, and not a stand-alone chock recommendation. The guide also uses tire diameter and directs application testing. Its test basis is an 8 percent grade.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "Selection guide band 2", "material": null, "length_in": null, "width_in": null, "height_in": null, "weight_lb": null, "published_rating_type": "Gross vehicle operating weight band", "published_rating_value": "Up to 40,000 lb gross vehicle operating weight", "max_tire_diameter_in": null, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "This band alone does not identify a suitable model. Use the complete manufacturer guide with tire diameter, conditions and the specified application validation.", "source_url": "https://checkers.justrite.com/mpattachments/file/viewonline/id/569/product_id/32604/", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C08", "record_type": "selected_guide_weight_band", "document_edition": "Checkers Wheel Chock Reference Guide CK407r1-guide(0325), copyright 2025", "source_locator": "Six selected weight-band headings; 8 percent grade test-basis note", "gross_vehicle_operating_weight_lb": 40000, "payload_capacity_as_reported": null, "guide_test_grade_pct": 8, "quantity_condition": null, "scope_note": "Selected guide band, not a product, not the complete chart, and not a stand-alone chock recommendation. The guide also uses tire diameter and directs application testing. Its test basis is an 8 percent grade.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "Selection guide band 3", "material": null, "length_in": null, "width_in": null, "height_in": null, "weight_lb": null, "published_rating_type": "Gross vehicle operating weight band", "published_rating_value": "Up to 50,000 lb gross vehicle operating weight", "max_tire_diameter_in": null, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "This band alone does not identify a suitable model. Use the complete manufacturer guide with tire diameter, conditions and the specified application validation.", "source_url": "https://checkers.justrite.com/mpattachments/file/viewonline/id/569/product_id/32604/", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C09", "record_type": "selected_guide_weight_band", "document_edition": "Checkers Wheel Chock Reference Guide CK407r1-guide(0325), copyright 2025", "source_locator": "Six selected weight-band headings; 8 percent grade test-basis note", "gross_vehicle_operating_weight_lb": 50000, "payload_capacity_as_reported": null, "guide_test_grade_pct": 8, "quantity_condition": null, "scope_note": "Selected guide band, not a product, not the complete chart, and not a stand-alone chock recommendation. The guide also uses tire diameter and directs application testing. Its test basis is an 8 percent grade.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "Selection guide band 4", "material": null, "length_in": null, "width_in": null, "height_in": null, "weight_lb": null, "published_rating_type": "Gross vehicle operating weight band", "published_rating_value": "Up to 60,000 lb gross vehicle operating weight", "max_tire_diameter_in": null, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "This band alone does not identify a suitable model. Use the complete manufacturer guide with tire diameter, conditions and the specified application validation.", "source_url": "https://checkers.justrite.com/mpattachments/file/viewonline/id/569/product_id/32604/", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C10", "record_type": "selected_guide_weight_band", "document_edition": "Checkers Wheel Chock Reference Guide CK407r1-guide(0325), copyright 2025", "source_locator": "Six selected weight-band headings; 8 percent grade test-basis note", "gross_vehicle_operating_weight_lb": 60000, "payload_capacity_as_reported": null, "guide_test_grade_pct": 8, "quantity_condition": null, "scope_note": "Selected guide band, not a product, not the complete chart, and not a stand-alone chock recommendation. The guide also uses tire diameter and directs application testing. Its test basis is an 8 percent grade.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "Selection guide band 5", "material": null, "length_in": null, "width_in": null, "height_in": null, "weight_lb": null, "published_rating_type": "Gross vehicle operating weight band", "published_rating_value": "Up to 70,000 lb gross vehicle operating weight", "max_tire_diameter_in": null, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "This band alone does not identify a suitable model. Use the complete manufacturer guide with tire diameter, conditions and the specified application validation.", "source_url": "https://checkers.justrite.com/mpattachments/file/viewonline/id/569/product_id/32604/", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C11", "record_type": "selected_guide_weight_band", "document_edition": "Checkers Wheel Chock Reference Guide CK407r1-guide(0325), copyright 2025", "source_locator": "Six selected weight-band headings; 8 percent grade test-basis note", "gross_vehicle_operating_weight_lb": 70000, "payload_capacity_as_reported": null, "guide_test_grade_pct": 8, "quantity_condition": null, "scope_note": "Selected guide band, not a product, not the complete chart, and not a stand-alone chock recommendation. The guide also uses tire diameter and directs application testing. Its test basis is an 8 percent grade.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" }, { "brand": "Checkers", "model": "Selection guide band 6", "material": null, "length_in": null, "width_in": null, "height_in": null, "weight_lb": null, "published_rating_type": "Gross vehicle operating weight band", "published_rating_value": "Up to 80,000 lb gross vehicle operating weight", "max_tire_diameter_in": null, "published_grade_limit_pct": null, "rating_is_a_holding_force": "No", "what_the_rating_does_not_tell_you": "This band alone does not identify a suitable model. Use the complete manufacturer guide with tire diameter, conditions and the specified application validation.", "source_url": "https://checkers.justrite.com/mpattachments/file/viewonline/id/569/product_id/32604/", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "id": "C12", "record_type": "selected_guide_weight_band", "document_edition": "Checkers Wheel Chock Reference Guide CK407r1-guide(0325), copyright 2025", "source_locator": "Six selected weight-band headings; 8 percent grade test-basis note", "gross_vehicle_operating_weight_lb": 80000, "payload_capacity_as_reported": null, "guide_test_grade_pct": 8, "quantity_condition": null, "scope_note": "Selected guide band, not a product, not the complete chart, and not a stand-alone chock recommendation. The guide also uses tire diameter and directs application testing. Its test basis is an 8 percent grade.", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable as manufacturer-reported" } ], "manufacturer-instructions": [ { "id": "M01", "manufacturer": "Blue Giant", "document": "StrongArm RVR303 Owner's Manual (part 038-953E)", "document_edition": "Rev.1.8, 13 March 2026", "section": "Section 6.1, Functional Description", "what_the_manufacturer_says": "Because ICC bars differ in strength and construction, review the need to use wheel chocks in conjunction with the vehicle restraint.", "why_it_matters_for_the_chock_question": "The restraint maker itself tells owners to assess whether chocks are still needed alongside the restraint.", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M02", "manufacturer": "Blue Giant", "document": "StrongArm RVR303 Owner's Manual", "document_edition": "Rev.1.8, 13 March 2026", "section": "Section 6.1", "what_the_manufacturer_says": "The restraint is designed for rear impact guards and rear impact protection that follow FMVSS Nos. 223 and 224.", "why_it_matters_for_the_chock_question": "The design assumption is a guard built to the federal standards. A guard outside that envelope is outside the design assumption.", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M03", "manufacturer": "Blue Giant", "document": "StrongArm RVR303 Owner's Manual", "document_edition": "Rev.1.8, 13 March 2026", "section": "Section 6.8, override feature", "what_the_manufacturer_says": "The override lets the operator skip engaging the restraint when the ICC bar is absent or cannot be reliably engaged. The manual states wheel chocks are necessary if the restraint is bypassed, and that the vehicle must be manually chocked before loading and unloading begins.", "why_it_matters_for_the_chock_question": "This is the manufacturer's own answer to whether chocks can be retired: when the restraint cannot engage, chocks are the documented fallback.", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M04", "manufacturer": "Blue Giant", "document": "StrongArm RVR303 Owner's Manual", "document_edition": "Rev.1.8, 13 March 2026", "section": "Section 3.1, operational safety warnings, item 5", "what_the_manufacturer_says": "Do not remove the wheel chocks until loading or unloading is finished and the truck is cleared for departure, or the restraint has been released and the lights have changed to red inside and green outside.", "why_it_matters_for_the_chock_question": "The warning gives conditions for removing chocks when they are used; it does not establish that both systems are mandatory in every operation.", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M05", "manufacturer": "Blue Giant", "document": "StrongArm RVR303 Owner's Manual", "document_edition": "Rev.1.8, 13 March 2026", "section": "Section 2.4, owner's responsibility, item 8", "what_the_manufacturer_says": "The owner or a trained and authorized representative must verify that the carrier's brakes are applied and a vehicle restraint and/or wheel chocks are properly engaged before loading or unloading begins.", "why_it_matters_for_the_chock_question": "The manufacturer's wording is 'and/or', not 'instead of'.", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M06", "manufacturer": "Blue Giant", "document": "StrongArm RVR303 Owner's Manual", "document_edition": "Rev.1.8, 13 March 2026", "section": "Section 2.4, owner's responsibility, item 4", "what_the_manufacturer_says": "Dock equipment that is structurally damaged, showing performance irregularities, or potentially compromised - the manual gives sudden loss of support from a premature truck departure as the example - must be removed from service until a trained and authorized manufacturer's representative inspects it and makes any necessary repairs.", "why_it_matters_for_the_chock_question": "This is the manufacturer instruction that matches condition three of OSHA's 1981 directive.", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M07", "manufacturer": "Blue Giant", "document": "StrongArm RVR303 Owner's Manual", "document_edition": "Rev.1.8, 13 March 2026", "section": "Section 7.4, p.16 planned maintenance intervals", "what_the_manufacturer_says": "Arrange for a qualified technician to perform scheduled planned maintenance every three months for single-shift operations, or monthly for multi-shift operations.", "why_it_matters_for_the_chock_question": "Condition two of OSHA's directive is maintenance as the manufacturer recommends. This is what one manufacturer recommends.", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M08", "manufacturer": "Blue Giant", "document": "StrongArm RVR303 Owner's Manual", "document_edition": "Rev.1.8, 13 March 2026", "section": "Section 12, p.32 troubleshooting; hook loose while inside lights green", "what_the_manufacturer_says": "One listed fault is: restraint hook does not hold the ICC bar tightly, inside lights turn green.", "why_it_matters_for_the_chock_question": "A green light is a status indication from the control system, not proof of a tight hold. The manufacturer documents the exact failure in which the two disagree.", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M09", "manufacturer": "Blue Giant", "document": "StrongArm RVR303 Owner's Manual", "document_edition": "Rev.1.8, 13 March 2026", "section": "Section 6.1", "what_the_manufacturer_says": "Wherever possible it is the responsibility of the truck or vehicle owner and operator to exhaust the air from air-ride suspension systems before loading or unloading.", "why_it_matters_for_the_chock_question": "The cited manual assigns a suspension-related operating duty; use the vehicle and restraint instructions together rather than inferring a universal air-dump procedure.", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M10", "manufacturer": "Rite-Hite", "document": "GWC-1000 Global Wheel Chock product page", "document_edition": "Read on the verification date", "section": "Secure Diverse Trailers at the Dock", "what_the_manufacturer_says": "A manually positioned wheel chock sold within the manufacturer's vehicle restraint line, described as helping to secure liftgate, delivery and parcel trucks and trailers without rear impact guards that traditional restraints cannot engage.", "why_it_matters_for_the_chock_question": "A major restraint maker sells a wheel chock specifically for the vehicles its hook restraints cannot hold. Chock and restraint are not always opposite choices.", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/wheel-based-restraints/global-wheel-chock", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M11", "manufacturer": "Rite-Hite", "document": "GWC-1000 Global Wheel Chock product page", "document_edition": "Read on the verification date", "section": "Design and Communication", "what_the_manufacturer_says": "An integrated ultra-sonic sensor on a 10 ft coil cord detects tire presence and drives interior and exterior light communication; the product is described as certified to meet and exceed ANSI MH30.3 performance testing standards.", "why_it_matters_for_the_chock_question": "Monitoring, not the device type, is what tells the dock and the driver what is happening. A chock can carry it.", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/wheel-based-restraints/global-wheel-chock", "verified_date": "2026-09-17", "evidence_type": "Source-reported - manufacturer claim; the page names no independent certifying body", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M12", "manufacturer": "Rite-Hite", "document": "GWC-1000 Global Wheel Chock product page", "document_edition": "Read on the verification date", "section": "Design", "what_the_manufacturer_says": "A completed dock survey is required for each dock position, and the manufacturer states the surveys are reviewed by its applications team when a dock falls outside standard configuration.", "why_it_matters_for_the_chock_question": "Fit is assessed per dock position, not per product brochure.", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/wheel-based-restraints/global-wheel-chock", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M13", "manufacturer": "Rite-Hite", "document": "GWC-1000 Global Wheel Chock product page", "document_edition": "Read on the verification date", "section": "Safety", "what_the_manufacturer_says": "Employees positioning trailer chocks are exposed in the drive approach; the manufacturer sells a separate backing-detection product to address that exposure.", "why_it_matters_for_the_chock_question": "Manual placement puts a worker on the drive approach. The site must manage vehicle movement and access; this is not a quantified cost or incident rate.", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/wheel-based-restraints/global-wheel-chock", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" }, { "id": "M14", "manufacturer": "Rite-Hite", "document": "SHR-5100 manufacturer product page", "document_edition": "Undated issuer page verified 17 September 2026", "section": "Low-profile carriage / dual-articulating nose", "what_the_manufacturer_says": "The 9 in low-profile carriage uses a dual-articulating nose extension intended to protect the unit while servicing rear impact guards lower than 22 in.", "why_it_matters_for_the_chock_question": "Guard height and the exact carriage option matter. This feature does not establish how common particular guard heights are.", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/original-rotating-hook-restraints/shadow-hook-restraint", "verified_date": "2026-09-17", "evidence_type": "Source-reported", "claim_type": "Primary-source and current-verification required", "publish_status": "Publishable within named model/document scope", "editorial_column_type": "why_it_matters_for_the_chock_question is Uptime editorial interpretation, not a manufacturer quotation" } ], "exceptions": [ { "id": "E01", "condition": "Pole trailer", "category": "Excluded from the guard rule", "why_a_rig_restraint_may_not_engage": "Not required to carry a rear impact guard, so there may be no bar to hook.", "authority_or_source": "FMCSA", "citation_or_url": "49 CFR 393.86(a)(1)", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "additional_source_urls": null, "source_locator": "49 CFR 393.86(a)(1)", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E02", "condition": "Pulpwood trailer", "category": "Excluded from the guard rule", "why_a_rig_restraint_may_not_engage": "Pulpwood trailers are excluded from 393.86(a)(1). Separately, 393.41(b) requires specified air-braked pulpwood, agricultural commodity and heavy hauler trailers to carry sufficient chocking blocks when parked; that is not a substitute requirement triggered by the guard exclusion.", "authority_or_source": "FMCSA", "citation_or_url": "49 CFR 393.86(a)(1); 49 CFR 393.41(b)", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "additional_source_urls": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-C/section-393.41", "source_locator": "49 CFR 393.86(a)(1); 49 CFR 393.41(b)", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E03", "condition": "Low chassis vehicle", "category": "Excluded from the guard rule", "why_a_rig_restraint_may_not_engage": "Excluded; the body or chassis itself may serve as rear end protection.", "authority_or_source": "FMCSA", "citation_or_url": "49 CFR 393.86(a)(1), (b)(3)", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "additional_source_urls": null, "source_locator": "49 CFR 393.86(a)(1), (b)(3)", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E04", "condition": "Special purpose vehicle", "category": "Excluded from the guard rule", "why_a_rig_restraint_may_not_engage": "Excluded; body or chassis may serve instead.", "authority_or_source": "FMCSA", "citation_or_url": "49 CFR 393.86(a)(1), (b)(3)", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "additional_source_urls": null, "source_locator": "49 CFR 393.86(a)(1), (b)(3)", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E05", "condition": "Wheels back vehicle", "category": "Excluded from the guard rule", "why_a_rig_restraint_may_not_engage": "Excluded; the rear tires sit close enough to the rear that the vehicle itself provides the protection.", "authority_or_source": "FMCSA", "citation_or_url": "49 CFR 393.86(a)(1), (b)(3)", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "additional_source_urls": null, "source_locator": "49 CFR 393.86(a)(1), (b)(3)", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E06", "condition": "Road construction controlled horizontal discharge trailer", "category": "Excluded from the guard rule", "why_a_rig_restraint_may_not_engage": "Excluded since the 2021 rule, matching NHTSA's 2004 change; a guard would block the discharge conveyor.", "authority_or_source": "FMCSA", "citation_or_url": "49 CFR 393.86(a)(1); 86 FR 62105", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "additional_source_urls": null, "source_locator": "49 CFR 393.86(a)(1); 86 FR 62105", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E07", "condition": "Trailer towed in a driveaway-towaway operation", "category": "Excluded from the guard rule", "why_a_rig_restraint_may_not_engage": "Excluded.", "authority_or_source": "FMCSA", "citation_or_url": "49 CFR 393.86(a)(1)", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "additional_source_urls": null, "source_locator": "49 CFR 393.86(a)(1)", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E08", "condition": "Trailer under 4,536 kg (10,000 lb) GVWR", "category": "Outside the rule's scope", "why_a_rig_restraint_may_not_engage": "Below the 4,536 kg (10,000 lb as printed) threshold in 393.86(a)(1); that does not automatically remove every other rear-protection or workplace-securement requirement.", "authority_or_source": "FMCSA", "citation_or_url": "49 CFR 393.86(a)(1)", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "additional_source_urls": null, "source_locator": "49 CFR 393.86(a)(1)", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E09", "condition": "Vehicle subject to older 393.86(b) geometry", "category": "Older geometry applies", "why_a_rig_restraint_may_not_engage": "For covered vehicles meeting that scope, the maximum ground clearance is 30 in, which can exceed the upper endpoint of a selected restraint window. This is not every vehicle made before 1998.", "authority_or_source": "FMCSA", "citation_or_url": "49 CFR 393.86(b)(1)(i)", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "additional_source_urls": null, "source_locator": "49 CFR 393.86(b)(1)(i)", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E10", "condition": "Guard that has sagged, bent or been repaired", "category": "Condition, not exclusion", "why_a_rig_restraint_may_not_engage": "Damage or repair can change engagement. Being below the maximum clearance does not prove compliance: attachment, damage and safe-condition requirements still apply.", "authority_or_source": "FMCSA", "citation_or_url": "Item 15.a.2 and 15.b.2; 396.3(a)(1)", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/appendix-Appendix%20A%20to%20Part%20396", "additional_source_urls": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/section-396.3", "source_locator": "Item 15.a.2 and 15.b.2; 396.3(a)(1)", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E11", "condition": "Guard shape and available contact space", "category": "Condition", "why_a_rig_restraint_may_not_engage": "Federal cross-sectional height and a restraint minimum contact-space specification are different measurements. SVR303 lists 4 in minimum contact space; matching a rounded unit conversion alone cannot prove or disprove fit.", "authority_or_source": "FMCSA and Blue Giant", "citation_or_url": "SVR303 technical specifications; 393.86(a)(5); Appendix A item 15.a.6", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.bluegiant.com/products/dock-equipment/vehicle-restraints/hydraulic/strongarm-svr303/", "additional_source_urls": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86 | https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/appendix-Appendix%20A%20to%20Part%20396", "source_locator": "SVR303 technical specifications; 393.86(a)(5); Appendix A item 15.a.6", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E12", "condition": "Guard missing, damaged or insecurely attached on arrival", "category": "Condition", "why_a_rig_restraint_may_not_engage": "A required guard that is missing, or a guard whose attachment is compromised, can fail the applicable inspection. A RIG-dependent device cannot be assumed to secure it. Do not use an override as proof of a safe arrangement.", "authority_or_source": "FMCSA and manufacturer literature", "citation_or_url": "Item 15; RVR303 sections 2.4 and 6.8", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/appendix-Appendix%20A%20to%20Part%20396", "additional_source_urls": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "source_locator": "Item 15; RVR303 sections 2.4 and 6.8", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E13", "condition": "Hydraulic lift gate at the rear", "category": "Obstruction", "why_a_rig_restraint_may_not_engage": "The lift gate occupies the space the hook needs and can hide or replace the guard. One manufacturer markets a monitored wheel chock specifically for liftgate, delivery and parcel vehicles.", "authority_or_source": "Manufacturer literature", "citation_or_url": "Named non-RIG/liftgate application", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/wheel-based-restraints/global-wheel-chock", "additional_source_urls": null, "source_locator": "Named non-RIG/liftgate application", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E14", "condition": "Intermodal container chassis", "category": "Configuration", "why_a_rig_restraint_may_not_engage": "Intermodal rear geometry needs a model-specific application check. Some named RIG restraints are designed for these configurations; an intermodal chassis is not automatically incompatible.", "authority_or_source": "Manufacturer literature", "citation_or_url": "Intermodal and obstructed-guard application", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/original-rotating-hook-restraints/shadow-hook-restraint", "additional_source_urls": null, "source_locator": "Intermodal and obstructed-guard application", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E15", "condition": "Rear flaps, bumpers or other components across the guard", "category": "Obstruction", "why_a_rig_restraint_may_not_engage": "Components around a guard can interfere with engagement. The SHR-5100 is marketed for some obstructed configurations, so confirm the actual obstruction and model rather than ruling out all such vehicles.", "authority_or_source": "Manufacturer literature", "citation_or_url": "Obstructed-guard application", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/original-rotating-hook-restraints/shadow-hook-restraint", "additional_source_urls": null, "source_locator": "Obstructed-guard application", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E16", "condition": "Guard sitting below the restraint's window", "category": "Geometry", "why_a_rig_restraint_may_not_engage": "The reviewed RIG restraint windows begin between 7 and 12 in. A guard below a particular model lower endpoint may not engage. No minimum ground clearance is specified in the cited guard clauses, but that is not proof that every lower position is legal.", "authority_or_source": "This build's spec ledger", "citation_or_url": "393.86(a)(3); named model engagement endpoints", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "additional_source_urls": "https://www.poweramp.com/products/vehicle-restraints/powerhook-restraint | https://www.bluegiant.com/products/dock-equipment/vehicle-restraints/hydraulic/strongarm-tl85/", "source_locator": "393.86(a)(3); named model engagement endpoints", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E17", "condition": "Air-ride suspension not exhausted", "category": "Condition during loading", "why_a_rig_restraint_may_not_engage": "The manual tells the truck owner/operator to exhaust air-ride suspension wherever possible before loading/unloading. Follow the applicable vehicle and restraint procedures; the instruction does not prove every non-exhausted trailer is incompatible.", "authority_or_source": "Blue Giant", "citation_or_url": "Section 6.1, p.10", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "additional_source_urls": null, "source_locator": "Section 6.1, p.10", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." }, { "id": "E18", "condition": "Dock approach that will not support a RIG restraint", "category": "Site condition", "why_a_rig_restraint_may_not_engage": "Mounting and the actual approach/trailer geometry need an application survey. A drainage or surface problem is not by itself proof that a particular RIG restraint cannot engage.", "authority_or_source": "Manufacturer literature", "citation_or_url": "Completed dock survey per dock position", "verified_date": "2026-09-17", "evidence_type": "Source-grounded editorial synthesis", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/wheel-based-restraints/global-wheel-chock", "additional_source_urls": null, "source_locator": "Completed dock survey per dock position", "claim_type": "Primary-source required for rule/feature; editorial judgment for compatibility implication", "publish_status": "Publishable as a qualification question, not a declaration of legal status or permission to load", "scope_note": "A named vehicle category or condition does not prove the actual vehicle is exempt or incompatible. Check exact definitions, guard/dock geometry and manufacturer instructions." } ] }, "summary": { "record_count": 108, "table_row_counts": { "authority-ledger": 30, "policy-timeline": 19, "restraint-specs": 15, "chock-ratings": 12, "manufacturer-instructions": 14, "exceptions": 18 }, "restraint_model_count": 15, "manufacturer_count": 5, "models_with_a_published_force_figure": 12, "printed_force_numbers_lb": [ 30000, 32000, 35000, 40000 ], "force_summary_limitation": "Printed numbers retain up-to/in-excess-of qualifiers. No mean, equivalent-capacity range, or cross-brand performance ranking is calculated.", "models_with_complete_vertical_window": 13, "low_endpoint_range_in": [ 7, 12 ], "high_endpoint_range_in": [ 25, 34 ], "arithmetic_span_range_in": [ 14.0, 27.0 ], "arithmetic_span_sum_in": 244.5, "mean_arithmetic_span_in": 18.81, "count_windows_starting_at_or_below_9_in": 8, "count_windows_ending_below_30_in": 8, "chock_product_count": 6, "selected_guide_weight_band_count": 6, "nameplate_example_load_lbf": 22500, "N_per_lbf_used": 4.448222, "nameplate_example_load_kN_unrounded": 100.084995, "nameplate_example_load_kN_rounded": 100.1, "rvr303_14_in_converted_mm": 355.6, "serco_14_ft_converted_in": 168, "models_without_a_published_force_figure": 3, "windows_starting_above_9_in": 5, "chock_products_with_a_published_GVW": 5, "published_chock_GVW_range_lb": [ 20000, 1600000 ], "evidence_type": "Calculated from the source-reported inputs in the released CSVs" }, "formulas": { "vertical_window_span_in": "published high endpoint - published low endpoint; arithmetic span, not measured travel", "mean_vertical_window_span_in": "sum of 13 complete arithmetic spans / 13", "count_windows_starting_at_or_below_9_in": "count complete rows with low endpoint <= 9 in", "count_windows_ending_below_30_in": "count complete rows with high endpoint < 30 in; not a legal fit result", "nameplate_example_load_kN": "22500 lbf * 4.448222 N/lbf / 1000 N/kN", "R15_wheel_capture_high_in": "14 ft * 12 in/ft = 168 in; rear-axle position from dock face, not a RIG window", "R01_reach_conversion_check_mm": "14 in * 25.4 mm/in = 355.6 mm; manufacturer prints 381 mm beside 14 in; unresolved source unit inconsistency" }, "source_manifest": [ { "source_id": "S001", "source_url": "https://checkers.justrite.com/general-purpose-rubber-wheel-chock-rc815", "publisher_host": "checkers.justrite.com", "used_by": "chock-ratings:C06", "exact_locations": "Product description and specifications", "editions_or_periods": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S002", "source_url": "https://checkers.justrite.com/heavy-duty-wheel-chock-mc3009", "publisher_host": "checkers.justrite.com", "used_by": "chock-ratings:C04", "exact_locations": "Product description and specifications", "editions_or_periods": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S003", "source_url": "https://checkers.justrite.com/heavy-duty-wheel-chock-mc3011", "publisher_host": "checkers.justrite.com", "used_by": "chock-ratings:C05", "exact_locations": "Product description and specifications", "editions_or_periods": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S004", "source_url": "https://checkers.justrite.com/mpattachments/file/viewonline/id/569/product_id/32604/", "publisher_host": "checkers.justrite.com", "used_by": "chock-ratings:C07 | chock-ratings:C08 | chock-ratings:C09 | chock-ratings:C10 | chock-ratings:C11 | chock-ratings:C12", "exact_locations": "Six selected weight-band headings; 8 percent grade test-basis note", "editions_or_periods": "Checkers Wheel Chock Reference Guide CK407r1-guide(0325), copyright 2025", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S005", "source_url": "https://checkers.justrite.com/uc1400-utility-wheel-chock-uc1400-6", "publisher_host": "checkers.justrite.com", "used_by": "chock-ratings:C02", "exact_locations": "Product description and specifications", "editions_or_periods": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S006", "source_url": "https://checkers.justrite.com/uc1700-utility-wheel-chock", "publisher_host": "checkers.justrite.com", "used_by": "chock-ratings:C03", "exact_locations": "Product description and specifications", "editions_or_periods": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S007", "source_url": "https://checkers.justrite.com/utility-step-wheel-chock-ucts003", "publisher_host": "checkers.justrite.com", "used_by": "chock-ratings:C01", "exact_locations": "Product description and specifications", "editions_or_periods": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S008", "source_url": "https://checkers.justrite.com/wheel-chock-selector-tool", "publisher_host": "checkers.justrite.com", "used_by": "Article: definitions, provenance or derivation", "exact_locations": "Vehicle weight, tire diameter and traction inputs", "editions_or_periods": "Verified 2026-09-17; underlying edition shown on source", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S009", "source_url": "https://og.mhi.org/lodem", "publisher_host": "og.mhi.org", "used_by": "authority-ledger:A26", "exact_locations": "2015 preview: foreword, scope 1.1-1.2 and contents; current edition: MHI/ANSI listing", "editions_or_periods": "2015 public preview; 2022 edition listed by MHI and ANSI", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S010", "source_url": "https://saemobilus.sae.org/standards/j348_202010-wheel-chocks", "publisher_host": "saemobilus.sae.org", "used_by": "authority-ledger:A27", "exact_locations": "SAE J348_202010, Wheel Chocks", "editions_or_periods": "J348_202010, stabilized 19 October 2020; revised 26 June 1990; issued 1 July 1968", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S011", "source_url": "https://webapps.dol.gov/elaws/elg/osha.htm", "publisher_host": "webapps.dol.gov", "used_by": "Article: definitions, provenance or derivation | authority-ledger:A07", "exact_locations": "STD 01-11-007, F.1-F.3 | Types of violations: de minimis", "editions_or_periods": "5 August 1981 | Verified 2026-09-17; underlying edition shown on source", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S012", "source_url": "https://webstore.ansi.org/preview-pages/MHIA/preview_ANSI%2BMH30.3-2015.pdf", "publisher_host": "webstore.ansi.org", "used_by": "authority-ledger:A26", "exact_locations": "2015 preview: foreword, scope 1.1-1.2 and contents; current edition: MHI/ANSI listing", "editions_or_periods": "2015 public preview; 2022 edition listed by MHI and ANSI", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S013", "source_url": "https://webstore.ansi.org/standards/mhia/ansimh302022-2488394", "publisher_host": "webstore.ansi.org", "used_by": "Article: definitions, provenance or derivation | authority-ledger:A26", "exact_locations": "2015 preview: foreword, scope 1.1-1.2 and contents; current edition: MHI/ANSI listing | 2022 edition listing; paid text not reviewed", "editions_or_periods": "2015 public preview; 2022 edition listed by MHI and ANSI | Verified 2026-09-17; underlying edition shown on source", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S014", "source_url": "https://www.bluegiant.com/en/products/dock-equipment/vehicle-restraints/electric/strongarm-hvr303/", "publisher_host": "www.bluegiant.com", "used_by": "restraint-specs:R04", "exact_locations": "Product specifications / features", "editions_or_periods": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S015", "source_url": "https://www.bluegiant.com/en/products/dock-equipment/vehicle-restraints/mechanical/strongarm-ml10/", "publisher_host": "www.bluegiant.com", "used_by": "restraint-specs:R05", "exact_locations": "Technical specifications: 30,000 lb; 11-26 in; 13 in", "editions_or_periods": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S016", "source_url": "https://www.bluegiant.com/getattachment/ba828654-caf3-4570-9bcd-b2f8a9b8a575/038-953E_StrongArm_RVR303_Owner_Rev.1.8_13-Mar-2026.pdf?ext=.pdf&lang=en-us", "publisher_host": "www.bluegiant.com", "used_by": "exceptions:E12 | exceptions:E17 | manufacturer-instructions:M01 | manufacturer-instructions:M02 | manufacturer-instructions:M03 | manufacturer-instructions:M04 | manufacturer-instructions:M05 | manufacturer-instructions:M06 | manufacturer-instructions:M07 | manufacturer-instructions:M08 | manufacturer-instructions:M09 | restraint-specs:R01", "exact_locations": "Item 15; RVR303 sections 2.4 and 6.8 | Section 12, p.32 troubleshooting; hook loose while inside lights green | Section 2.4, owner's responsibility, item 4 | Section 2.4, owner's responsibility, item 8 | Section 3.1, operational safety warnings, item 5 | Section 6.1 | Section 6.1, Functional Description | Section 6.1, p.10 | Section 6.8, override feature | Section 7.4, p.16 planned maintenance intervals | p.4 capacity/geometry; p.20 section 9.0 example nameplate", "editions_or_periods": "13 March 2026 | Document-specific; see row | Rev.1.8, 13 March 2026", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S017", "source_url": "https://www.bluegiant.com/products/dock-equipment/vehicle-restraints/hydraulic/strongarm-svr303/", "publisher_host": "www.bluegiant.com", "used_by": "exceptions:E11 | restraint-specs:R02", "exact_locations": "SVR303 technical specifications; 393.86(a)(5); Appendix A item 15.a.6 | Technical specifications: capture range and minimum contact space", "editions_or_periods": "Document-specific; see row | Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S018", "source_url": "https://www.bluegiant.com/products/dock-equipment/vehicle-restraints/hydraulic/strongarm-tl85/", "publisher_host": "www.bluegiant.com", "used_by": "exceptions:E16 | restraint-specs:R03", "exact_locations": "393.86(a)(3); named model engagement endpoints | Product specifications / features", "editions_or_periods": "Document-specific; see row | Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S019", "source_url": "https://www.dir.ca.gov/title8/3650.html", "publisher_host": "www.dir.ca.gov", "used_by": "authority-ledger:A28 | authority-ledger:A29 | authority-ledger:A30", "exact_locations": "8 CCR 3650(j) | 8 CCR 3650(t)(22) | 8 CCR 3650(t)(23)", "editions_or_periods": "Current as read", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S020", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-C/section-393.41", "publisher_host": "www.ecfr.gov", "used_by": "authority-ledger:A15 | exceptions:E02", "exact_locations": "393.41(a), (b), (c) | 49 CFR 393.86(a)(1); 49 CFR 393.41(b)", "editions_or_periods": "Current as read | Document-specific; see row", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S021", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-393/subpart-G/section-393.86", "publisher_host": "www.ecfr.gov", "used_by": "authority-ledger:A16 | authority-ledger:A17 | authority-ledger:A18 | exceptions:E01 | exceptions:E02 | exceptions:E03 | exceptions:E04 | exceptions:E05 | exceptions:E06 | exceptions:E07 | exceptions:E08 | exceptions:E09 | exceptions:E11 | exceptions:E16", "exact_locations": "393.86(a)(3); named model engagement endpoints | 49 CFR 393.86(a)(1) | 49 CFR 393.86(a)(1), (b)(3) | 49 CFR 393.86(a)(1); 49 CFR 393.41(b) | 49 CFR 393.86(a)(1); 86 FR 62105 | 49 CFR 393.86(a)(2)-(a)(5) | 49 CFR 393.86(b)(1)(i) | 49 CFR 393.86(b)(1)-(b)(3) | SVR303 technical specifications; 393.86(a)(5); Appendix A item 15.a.6", "editions_or_periods": "Document-specific; see row | Last amended 91 FR 7877, 19 February 2026", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S022", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/appendix-Appendix%20A%20to%20Part%20396", "publisher_host": "www.ecfr.gov", "used_by": "authority-ledger:A23 | authority-ledger:A24 | exceptions:E10 | exceptions:E11 | exceptions:E12", "exact_locations": "Appendix A to 49 CFR Part 396, item 15.a | Appendix A to 49 CFR Part 396, item 15.b | Item 15.a.2 and 15.b.2; 396.3(a)(1) | Item 15; RVR303 sections 2.4 and 6.8 | SVR303 technical specifications; 393.86(a)(5); Appendix A item 15.a.6", "editions_or_periods": "Added by 86 FR 62105, effective 9 December 2021 | Document-specific; see row", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S023", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/section-396.17", "publisher_host": "www.ecfr.gov", "used_by": "authority-ledger:A25", "exact_locations": "49 CFR 396.3(a)(1) and 49 CFR 396.17", "editions_or_periods": "Current as read", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S024", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-III/subchapter-B/part-396/section-396.3", "publisher_host": "www.ecfr.gov", "used_by": "authority-ledger:A25 | exceptions:E10", "exact_locations": "49 CFR 396.3(a)(1) and 49 CFR 396.17 | Item 15.a.2 and 15.b.2; 396.3(a)(1)", "editions_or_periods": "Current as read | Document-specific; see row", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S025", "source_url": "https://www.ecfr.gov/current/title-49/subtitle-B/chapter-V/part-571/subpart-B/section-571.223", "publisher_host": "www.ecfr.gov", "used_by": "authority-ledger:A20 | authority-ledger:A21 | authority-ledger:A22 | policy-timeline:18", "exact_locations": "49 CFR 571.223 S5.2.1 | 49 CFR 571.223 S5.2.2 | 49 CFR 571.223 S6.6(a) | 87 FR 42339 DATES; background at 42345; amendatory text at 42366; lead-time discussion", "editions_or_periods": "2022-07-15 | Last amended 87 FR 42366, 15 July 2022", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S026", "source_url": "https://www.federalregister.gov/documents/2021/11/09/2021-23796/parts-and-accessories-necessary-for-safe-operation-rear-impact-guards-and-rear-impact-protection", "publisher_host": "www.federalregister.gov", "used_by": "policy-timeline:1 | policy-timeline:17 | policy-timeline:6", "exact_locations": "FMCSA final rule 86 FR 62105, effective 9 December 2021 | FMVSS Nos. 223 and 224 created (61 FR 2004) | ICC Bureau of Motor Carriers rear-end protection rule (17 FR 4445)", "editions_or_periods": "1952-05-15 | 1996-01-24 | 2021-11-09", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S027", "source_url": "https://www.govinfo.gov/content/pkg/FR-2022-07-15/html/2022-14330.htm", "publisher_host": "www.govinfo.gov", "used_by": "Article: definitions, provenance or derivation | authority-ledger:A20 | authority-ledger:A21 | policy-timeline:18", "exact_locations": "49 CFR 571.223 S5.2.1 | 49 CFR 571.223 S5.2.2 | 87 FR 42339 DATES; background at 42345; amendatory text at 42366; lead-time discussion | DATES; II.a background; amended standard and lead-time discussion", "editions_or_periods": "2022-07-15 | Last amended 87 FR 42366, 15 July 2022 | Verified 2026-09-17; underlying edition shown on source", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S028", "source_url": "https://www.govinfo.gov/content/pkg/FR-2026-02-19/pdf/2026-03255.pdf", "publisher_host": "www.govinfo.gov", "used_by": "authority-ledger:A19 | policy-timeline:19", "exact_locations": "49 CFR 393.86(a)(6) | FMCSA final rule 91 FR 7874, effective 23 March 2026", "editions_or_periods": "2026-02-19 | Rescinded by 91 FR 7874, effective 23 March 2026", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S029", "source_url": "https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b9", "publisher_host": "www.nist.gov", "used_by": "Article: definitions, provenance or derivation", "exact_locations": "SP 811 Appendix B.9 force conversion", "editions_or_periods": "Verified 2026-09-17; underlying edition shown on source", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S030", "source_url": "https://www.osha.gov/enforcement/directives/std-01-11-007", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A07 | policy-timeline:3 | policy-timeline:4", "exact_locations": "F.1-F.3 | OSHA Instruction STD 1-11.5 | STD 01-11-007, F.1-F.3", "editions_or_periods": "1978 | 1981-08-05 | 5 August 1981", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S031", "source_url": "https://www.osha.gov/laws-regs/interlinking/standards/1910.178%28k%29%281%29/directives", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A08 | policy-timeline:10", "exact_locations": "CPL 02-01-030 index entry; June 2011 interpretation, response 2 | OSHA CPL 2-1.30, now CPL 02-01-030", "editions_or_periods": "19 October 1999 per OSHA directive index; March 2011 letter says 1 October 1999 | 1999-10-19", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S032", "source_url": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.178", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A01 | authority-ledger:A02 | authority-ledger:A03 | authority-ledger:A04 | policy-timeline:2", "exact_locations": "29 CFR 1910.178(k)(1) | 29 CFR 1910.178(k)(1) and (m)(7) | 29 CFR 1910.178(k)(2) | 29 CFR 1910.178(k)(3) | 29 CFR 1910.178(m)(7)", "editions_or_periods": "1971 | Current as read", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S033", "source_url": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.21", "publisher_host": "www.osha.gov", "used_by": "Article: definitions, provenance or derivation", "exact_locations": "1910.21(b), dockboard", "editions_or_periods": "Verified 2026-09-17; underlying edition shown on source", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S034", "source_url": "https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.26", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A05 | policy-timeline:16", "exact_locations": "1910.26(d); dockboard definition at 1910.21(b) | Walking-working surfaces final rule (81 FR 82990) creating 29 CFR 1910.26", "editions_or_periods": "2016-11-18 | Created by the 2016 walking-working surfaces rule, 81 FR 82990", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S035", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/1996-02-09", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A09 | policy-timeline:7", "exact_locations": "OSHA letter of interpretation | OSHA letter, 9 February 1996", "editions_or_periods": "1996-02-09 | 9 February 1996", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S036", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2005-09-14", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A07 | authority-ledger:A10 | policy-timeline:12", "exact_locations": "OSHA letter to Michael O. Foster | OSHA letter to Michael O. Foster, 14 September 2005 | STD 01-11-007, F.1-F.3", "editions_or_periods": "14 September 2005 | 2005-09-14 | 5 August 1981", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S037", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2005-11-08", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A11 | policy-timeline:13", "exact_locations": "OSHA letter to Robert M. Turner | OSHA letter to Robert M. Turner, 8 November 2005", "editions_or_periods": "2005-11-08 | 8 November 2005", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S038", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-03-07", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A06 | authority-ledger:A08 | authority-ledger:A12 | policy-timeline:10 | policy-timeline:11 | policy-timeline:14 | policy-timeline:3 | policy-timeline:5 | policy-timeline:8 | policy-timeline:9", "exact_locations": "29 CFR 1910.178(l)(3)(i)(A), (l)(3)(i)(M), (l)(3)(ii)(A) | CPL 02-01-030 index entry; June 2011 interpretation, response 2 | FMCSA letter to OSHA | OSHA CPL 2-1.30, now CPL 02-01-030 | OSHA Instruction STD 1-11.5 | OSHA letter to Peter Blumenthal | OSHA letter to Ron Cole | OSHA letter to Ron Cole, 7 March 2011 | OSHA memorandum (Southwest Transportation) | Revocation of 49 CFR 392.20", "editions_or_periods": "19 October 1999 per OSHA directive index; March 2011 letter says 1 October 1999 | 1978 | 1991-04-01 | 1998 | 1998-03-04 | 1999-10-19 | 2001-03-30 | 2011-03-07 | 7 March 2011 | Current as read", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S039", "source_url": "https://www.osha.gov/laws-regs/standardinterpretations/2011-06-14", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A08 | authority-ledger:A13 | policy-timeline:10 | policy-timeline:15", "exact_locations": "CPL 02-01-030 index entry; June 2011 interpretation, response 2 | OSHA CPL 2-1.30, now CPL 02-01-030 | OSHA letter to Margaret Irwin, 14 June 2011 | OSHA letter to Margaret Irwin, American Trucking Associations", "editions_or_periods": "14 June 2011 | 19 October 1999 per OSHA directive index; March 2011 letter says 1 October 1999 | 1999-10-19 | 2011-06-14", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S040", "source_url": "https://www.osha.gov/node/57097", "publisher_host": "www.osha.gov", "used_by": "Article: definitions, provenance or derivation", "exact_locations": "OSHA does not approve/endorse products", "editions_or_periods": "Verified 2026-09-17; underlying edition shown on source", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S041", "source_url": "https://www.osha.gov/powered-industrial-trucks/loading-unloading", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A07", "exact_locations": "STD 01-11-007, F.1-F.3", "editions_or_periods": "5 August 1981", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S042", "source_url": "https://www.osha.gov/stateplans", "publisher_host": "www.osha.gov", "used_by": "authority-ledger:A14", "exact_locations": "OSHA State Plans directory", "editions_or_periods": "Current directory", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S043", "source_url": "https://www.pentalift.com/wp-content/uploads/2021/04/RVR32-Brochure.pdf", "publisher_host": "www.pentalift.com", "used_by": "restraint-specs:R10", "exact_locations": "p.2 specifications", "editions_or_periods": "Footer 0121D050; no publication date inferred from URL", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S044", "source_url": "https://www.pentalift.com/wp-content/uploads/2021/04/UHRSpec.pdf", "publisher_host": "www.pentalift.com", "used_by": "restraint-specs:R12", "exact_locations": "p.2 Description and Dimensions", "editions_or_periods": "Undated specification", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S045", "source_url": "https://www.pentalift.com/wp-content/uploads/2021/05/MFRAL-Spec.pdf", "publisher_host": "www.pentalift.com", "used_by": "restraint-specs:R11", "exact_locations": "p.2 Description and Dimensions", "editions_or_periods": "Undated specification", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S046", "source_url": "https://www.poweramp.com/products/vehicle-restraints/powerhook-restraint", "publisher_host": "www.poweramp.com", "used_by": "exceptions:E16 | restraint-specs:R13", "exact_locations": "393.86(a)(3); named model engagement endpoints | Restraint force; service range 7-34 in; horizontal reach 0-15 in", "editions_or_periods": "Document-specific; see row | Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S047", "source_url": "https://www.poweramp.com/products/vehicle-restraints/powerstop-vehicle-restraint", "publisher_host": "www.poweramp.com", "used_by": "restraint-specs:R14", "exact_locations": "32,000 lb; service range 12-29.5 in and 0-10 in horizontally", "editions_or_periods": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S048", "source_url": "https://www.ritehite.com/en/am/news/2015/news/ritehite-doklok-universal-restraint-meets-evolving-needs", "publisher_host": "www.ritehite.com", "used_by": "restraint-specs:R07", "exact_locations": "Published 9-30 in range", "editions_or_periods": "2015; historical source", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S049", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/original-rotating-hook-restraints/shadow-hook-restraint", "publisher_host": "www.ritehite.com", "used_by": "exceptions:E14 | exceptions:E15 | manufacturer-instructions:M14 | restraint-specs:R08", "exact_locations": "9-30 in range; Pull-Out Force Benchmarks | Intermodal and obstructed-guard application | Low-profile carriage / dual-articulating nose | Obstructed-guard application", "editions_or_periods": "Document-specific; see row | Undated issuer page verified 17 September 2026 | Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S050", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/vertical-barrier-restraints/wall-mounted", "publisher_host": "www.ritehite.com", "used_by": "restraint-specs:R06", "exact_locations": "Pull-Out Force Benchmarks; specifications", "editions_or_periods": "Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. Standard listings/previews are not the paid full text; manufacturer specifications are not independent testing.", "rights_note": "Source owners retain their rights. Links and short factual paraphrases; no assigned third-party license." }, { "source_id": "S051", "source_url": "https://www.ritehite.com/en/am/products/vehicle-restraints/wheel-based-restraints/global-wheel-chock", "publisher_host": "www.ritehite.com", "used_by": "exceptions:E13 | exceptions:E18 | manufacturer-instructions:M10 | manufacturer-instructions:M11 | manufacturer-instructions:M12 | manufacturer-instructions:M13 | restraint-specs:R09", "exact_locations": "Completed dock survey per dock position | Design | Design and Communication | Design, communication and application survey; manufacturer standard claim | Named non-RIG/liftgate application | Safety | Secure Diverse Trailers at the Dock", "editions_or_periods": "Document-specific; see row | Read on the verification date | Undated issuer product page, verified 2026-09-17", "verified_date": "2026-09-17", "verification_scope": "Issuer-published material; some earlier records verified through later issuer history. 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