Dock Seal, Shelter, Bumper & Dock Plate Repair in Ontario, CA
For dock seal, shelter, bumper and dock plate repair in Ontario, CA, call (385) 325-7138 about trailer impact damage at the bay — a torn seal, a shredded shelter curtain, crushed or missing bumpers, or a damaged portable dock plate. Tell us the facility location and the bay number.
This is the equipment around and across the opening. The leveler, the door and the restraint each have their own page.
Call to describe the problem—if the door is stuck open or the dock is down, say so first.
Independent service-request website. Calls may be shared with an independent commercial dock-and-door repair company. That provider confirms availability, scope, pricing, and service terms.
Safety rules and standards on this page checked 18 September 2026.
Which piece of dock equipment is this?
A trailer impact or a pull-away can damage several parts of the bay at once. Name the parts you already know, or describe what is torn, bent or missing. You do not need to inspect the bay before calling.
| What you're looking at | What it's called | Repaired, or replaced? | What to mention on the call |
|---|---|---|---|
| Fabric pads around the opening that the trailer presses into | Dock seal | Pads and wear strips are often replaceable in sections; the head pad and frame need assessment before choosing component or unit replacement | How far the tear runs, and whether it's pulled off its frame |
| Canopy the trailer backs under, with side curtains | Dock shelter | Curtains, stays and fabric often replaceable; frame damage changes the answer | Whether a trailer took the frame with it |
| Black rubber blocks bolted to the dock face | Dock bumper | Damaged pads or assemblies may need replacement; mounting also needs assessment | Whether trailers are now hitting bare concrete or the leveler lip |
| Portable bridging plate or board, sometimes with handles or lifting loops | Portable dock plate or dock board | See the hard rule below | That it's portable, and exactly what's bent or cracked |
| Lights on swing arms inside the bay | Dock light | Fixture and arm usually replaced; wiring may be a separate trade | Whether it's the fixture or the power |
| Rubber or steel blocks placed at trailer wheels | Wheel chocks | Replaced | Whether any are missing or damaged |
| Steel plate built into the floor that tilts into the trailer | Dock leveler — wrong page | — | Dock leveler repair |
| Hook or arm that grabs the trailer's rear bar | Trailer restraint — wrong page | — | Trailer restraint repair |
Dock seals and shelters
A dock seal is a set of foam pads in a tough fabric cover, mounted around the opening, that the back of the trailer compresses against. A dock shelter is a frame and curtain the trailer backs under, with side curtains that drape against it. Selection depends on trailer size range, opening geometry and required access; adjustable and inflatable designs have their own limits.
Either way, the job is the same: close the gap between the building and the trailer.
When it fails, it stops being cosmetic fast. Conditioned air leaves, weather and pests come in, and loose fabric hanging off the frame catches on the next trailer and tears further. In Ontario's food, beverage and cold-chain buildings, a torn seal at a temperature-controlled opening is part of the building envelope, and it moves up the priority list accordingly.
What a qualified provider looks at: pad condition and compression, fabric and wear strips, the head pad, the backer boards, the frame and its attachment to the wall, and whether the trailer mix has changed since the unit went in.
What is repairable versus replaced: individual covers, wear strips and pads can be replaceable, depending on the model. A torn head pad or bent frame needs assessment; it does not automatically require replacing the whole unit. Ask which components remain serviceable, whether replacements are compatible and why a complete replacement is being proposed.
Dock bumpers
Dock bumpers cushion contact between trailers and the dock. Rubber, laminated and steel-faced assemblies protect the dock face and help maintain the intended stand-off between trailer and building. They are not a substitute for sound mounting or a suitable dock arrangement.
When a bumper is crushed, delaminated, torn off or missing, a trailer can contact surfaces the bumper was meant to protect. Report any contact already observed with concrete, the wall or the leveler lip. Do not test a damaged bumper by backing a trailer against it.
Worn rubber elements are normally replaced. The provider should assess the complete bumper assembly, mounting and any replaceable wear components.
Questions worth asking when you replace them: what projection you need (how far the bumper stands off the wall), whether laminated, moulded or steel-faced suits your traffic, whether the mounting hardware and anchors are still sound, and whether your dock height and trailer mix have changed since the originals went in. If trailers have got taller or the dock has settled, the same bumper in the same place may not be doing the job.
Where this stops: if the concrete behind the bumper is cracked or spalled, that's a structural repair and a different trade. A provider can tell you it's there. Fixing it isn't in this scope.
Dock plates and dock boards
A dock plate or dock board is a portable bridging device — not permanently fixed to the dock or to the trailer, and able to be moved by hand or by powered equipment. That's the distinction that matters, and it's not just vocabulary.
The consensus standards split portable from built-in. MHI / LODEM identifies ANSI MH30.2-2022 for portable dock leveling devices, MH30.1-2022 for installed levelers and MH30.3-2022 for vehicle restraints. These are consensus standards; whether a provision is binding depends on applicable regulations and other requirements, not merely on its publication.
Federal OSHA uses a broader definition. 1910.21(b) includes bridge plates, dock plates and levelers within “dockboard.” 1910.26 requires maximum-intended-load support; run-off protection for devices first put into service on or after 17 January 2017, subject to its no-hazard exception; and secured portable dockboards, subject to its infeasibility-and-sufficient-contact exception. Measures such as chocks or sand shoes must prevent transport-vehicle movement while employees are on the dockboard. Portable devices need handholds or other means for safe handling.
California has its own applicable state-plan rule. Most private California workplaces are under Cal/OSHA rather than federal OSHA (OSHA California State Plan). Title 8, section 3337, Dock Plates and Loading Ramps requires that every dock plate and loading ramp be constructed and maintained with strength sufficient to support the load carried on it; that it be secured in position when spanning the space between the dock and the vehicle, with securing devices that obtain rigid security over spans of different lengths; that when secured, its end edges be in substantial contact with the dock and with the vehicle bed so it can't rock or slide; and that adequate and safe means be provided for moving it. Checked 18 September 2026.
Portable does not mean forklift-rated. MHI describes dock plates as typically used for lighter-duty hand loading and dock boards as typically intended for heavier material-handling loads. The actual device's rating, condition, geometry and manufacturer instructions determine suitability. Your employer's safety team and enforcing agency determine the applicable workplace requirements.
The hard rule, plainly. Never assume a bent, cracked, deformed or delaminated portable device can be welded, straightened or returned to service. Keep damaged equipment out of use through the facility's process and obtain a manufacturer-supported repair or correctly rated replacement decision. A weld does not establish a load rating, and an undamaged plate is not automatically suitable for a forklift. Parts-only purchases go to a supplier; this page is a service-request path.
You know what this equipment is now.
Dock lights, chocks and other bay hardware
Dock lights are the fixtures on swing arms that light the inside of a trailer. The fixture, arm and switch are straightforward. The circuit behind them may be a separate trade — C-10 — Electrical covers electrical wiring and equipment; ask which classification covers the proposed circuit work. Say whether the fixture is damaged or nothing has power.
Wheel chocks can be missing, worn or damaged. They're replaced, not repaired. If your bays use a chock-and-interlock arrangement rather than a mechanical restraint, the interlock side is covered on the trailer restraint page.
Guard posts, corner guards and dock face hardware may need assessment after the same impact. Ask whether the provider can include them in the proposed visit and scope.
What we cover, and what we don't
Covered: dock seals, dock shelters, dock bumpers and mounting hardware, portable dock plates and boards, dock lights, wheel chocks and bay guard hardware at commercial and industrial facilities.
Not covered, and where to go instead:
- Structural concrete, pit, dock face and slab work — a concrete contractor.
- The installed leveler — dock leveler repair.
- Trailer restraints and communication lights — trailer restraint repair.
- Residential garages, boat docks and boat lifts, truck and trailer cargo doors, pedestrian storefront and walk-through doors with their locks and closers, parts-only orders — all outside our scope.
What happens when you call
- You call (385) 325-7138 and describe what's damaged. Facility location first, then the bay.
- Your call may be shared with an independent commercial dock-and-door repair company.
- That company confirms availability, scope, pricing, scheduling and its own contract, work and warranty terms.
Uptime Dock & Door is an independent commercial service-request website for loading-dock and commercial door repair. We don't repair equipment, price work or schedule visits.
Example of what that first sentence can sound like: "A trailer tore the seal off Bay 3 at our Ontario warehouse and the bumper's gone on one side." That is example wording, not a script and not a real job.
If you reach voicemail, leave the facility address, the door or dock number if known, what's wrong, and a callback number.
Useful on the call — and not required
Bay number. How many bays are affected. Rough opening size. Whether the bay is still usable. Whether the damage is fabric only or the frame took it too. Whether the leveler or door got hit in the same incident.
You do not need any of it. The address and "a trailer tore the seal off Bay 3" is a complete first call. Don't walk up to damaged equipment to give us better detail.
What drives the price
We can't quote this from a web page. The price depends on the component, the damage, parts, and access. Here's what to ask before you authorize work.
| Cost driver | Why it moves the number |
|---|---|
| Diagnostic or service-call charge | Somebody has to look at the bay first |
| Travel to the site | Distance and access time |
| Number of bays affected | The number of devices, access and coordinated work affect the quote; no volume discount is assumed |
| Seal versus shelter | Different units, different money |
| Fabric only versus frame damage | Fabric is a part; a frame is a unit |
| Bumper size, projection and count | Projection, construction, mounting and size change the scope |
| Plate or board replacement rather than repair | Compare an approved repair with a correctly rated replacement; parts-only purchases go to a supplier |
| Access | Whether the bay can be emptied and the trailer moved |
| Parts lead time | Custom sizes and non-standard projections take longer |
Ask which kind of number you're being given — a diagnostic fee, a starting price, a scoped fixed price, an estimate, or a final quote — and ask whether removal and disposal of the old parts is in it.
You know what to ask now.
Planned dock equipment service
Seals, shelters, bumpers and lights can be affected by the same trailer movement, but they do not necessarily wear or fail together. Ask for a planned scope that assesses each selected device and its mounting, rather than assuming one condition describes the whole bay.
What to ask a provider to define in a planned scope: which bays and which devices are included, what gets inspected on each, whether the leveler and restraints are in the same visit, what documentation you receive, and how corrective work found during the visit is authorized separately.
For the door side, see commercial garage door maintenance. For levelers, see the planned service section on dock leveler repair.
Local rules that touch this equipment
OSHA 1910.26 and Cal/OSHA Title 8 section 3337 are regulations within their respective jurisdictions. ANSI MH30.2 is a consensus standard for portable devices. The applicable regulation, manufacturer documentation and project requirements matter; a catalog title alone does not settle compliance.
Mounting and electrical work. Ask Ontario Building whether the specific anchorage, replacement or new circuit needs a permit. For facilities in another city or unincorporated territory, use the service-area authority table. Do not treat the word “repair” as an exemption.
The licence. Check whoever quotes the work: CSLB licence lookup. In California, D-28 covers doors and D-21 is the classification whose scope names dock levelers — so a combined dock-and-door job can involve more than one classification question. More on that on the Ontario dock and door hub page.
We don't decide which rule applies to your dock. We give you the rule, where to check it, and the question to ask; the provider and the issuing office confirm it.
Where we take these calls
Ontario and the surrounding Inland Empire, across San Bernardino and Riverside Counties. The independent provider confirms the facility address and its own availability. Full service area →
Dock equipment questions
Can a torn dock seal be patched?
Sometimes. Wear strips, covers or individual pads can be replaceable when compatible parts are available. Ask the provider to assess the frame and attachments, identify the parts being replaced and explain whether repairing those components or replacing the unit better addresses the damage.
How do I know when a bumper needs replacing?
Crushing, splitting, delamination, missing material or loose mounting are reasons to report it. Have the provider assess wear against the manufacturer's limits and check the stand-off and mounting. Do not wait for contact with bare concrete—or use a trailer to test whether a damaged bumper still works.
Is a damaged dock plate repairable?
Do not use a damaged plate or assume a weld restores its rating. Ask for a manufacturer-supported assessment and compare any approved repair with a correctly rated replacement. Forklift suitability must be established for the actual device, not inferred from its appearance.
Can seals, bumpers and a leveler all be handled in one visit?
Ask—it is a reasonable request when several devices need attention. The provider confirms what it can cover in a single trip, and remember the leveler can be a separate licence classification question in California.
Get the bay back in shape
Tell us the facility location, the bay, and what's torn, crushed or missing.
Independent service-request website. Calls may be shared with an independent commercial dock-and-door repair company. That provider confirms availability, scope, pricing, and service terms.
Ontario dock and door repair · All Ontario services · Service area · Call details · National loading dock repair · How Uptime works · About Uptime
Sources
- City of Ontario — Building Department — checked 18 September 2026
- OSHA — 1910.21(b), dockboard definition — checked 18 September 2026
- OSHA — 29 CFR 1910.26 Dockboards — checked 18 September 2026
- Cal/OSHA — Title 8 section 3337, Dock Plates and Loading Ramps — checked 18 September 2026
- OSHA — California State Plan — checked 18 September 2026
- MHI / LODEM — loading dock equipment standards — checked 18 September 2026
- CSLB — licence lookup — checked 18 September 2026
- CSLB — D-21 Machinery and Pumps — checked 18 September 2026
- CSLB — C-10 Electrical — checked 18 September 2026