Trailer & Vehicle Restraint Repair in Salt Lake City, UT
For trailer restraint repair and vehicle restraint repair in Salt Lake City, UT, call (385) 325-7138 when a restraint will not engage, will not release, or the dock lights are not switching. Tell us the facility location, the bay number, and whether a trailer is held at the dock right now.
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.
Facts checked: September 17, 2026.
Is this the right page?
A vehicle restraint — also called a trailer restraint or a dock lock — is the device at the dock face that holds the trailer at the bay so it cannot creep away or pull off while a forklift is inside it. Some grab the rear impact guard under the back of the trailer. Some grab the rear wheels. Some are a barrier that swings up behind them.
- Something at the dock face that holds the trailer? You are in the right place.
- The hinged steel deck that bridges into the trailer → dock leveler repair
- Dock lights, seals, shelters, bumpers and chocks on their own → dock equipment repair
- The door above the bay → overhead or roll-up
What kind of restraint is it?
Optional. Say it if you know it.
| Restraint type | How you recognize it | What it grabs |
|---|---|---|
| Rotating-hook restraint | A hook rises out of the dock face and swings over a bar under the trailer | The rear impact guard, sometimes called the RIG or the ICC bar |
| Wheel-based restraint | A unit that moves along the drive and stops against the rear wheels | The trailer's rear wheels |
| Barrier restraint | An arm or barrier that raises behind the trailer | Blocks the trailer rather than latching it |
| Manual chock with an interlock | A chock placed by hand, tied into a sensor and the light set | Depends on placement, so the sensor matters |
| Communication light set | Red and green lights inside the building and outside at the bay | Tells the driver and the dock who has control |
| Leveler or door interlock | Wiring that stops the leveler or the door from operating until the restraint is set | Ties several pieces of dock equipment into one system |
Names you may see on the unit include Rite-Hite, Kelley, Serco, Poweramp and Nordock. Identification only — not a claim that any brand is installed at your facility, that anyone is an authorized dealer, or that every brand is covered.
What is going wrong with it?
| What you are seeing | What a qualified provider may inspect | Why it matters | How to report it |
|---|---|---|---|
| Will not engage | Hook or wheel unit, drive, trailer interface, controls | The trailer cannot be secured, so the bay should not be worked | "Restraint won't grab on bay 9" |
| Engages but the lights do not change | Sensors, controls, light set, wiring | If the lights lie, nobody at the bay has good information | "It's hooked but the light stays red" |
| Will not release, trailer still at the bay | Unit, drive, controls, release path | The trailer is stuck. That is information for the call, not a problem to solve at the dock face | "Won't let go, driver's waiting" |
| Releases on its own | Unit condition, controls, sensors | A restraint that lets go by itself is the worst failure mode there is | "It dropped off while they were loading" |
| Damaged after a trailer pulled away | Unit, mounting, dock face, surrounding equipment | Pull-away damage usually runs into the mounting and the face | "Driver left with it still hooked" |
| Controls dead | Power, controls, interlocks, the system it belongs to | The fault may be upstream of the restraint | "Panel's dark, nothing responds" |
| Inside and outside lights disagree | Light set, controls, wiring | Two people are getting two different answers at the same bay | "Inside says red, outside says green" |
| Leveler will not operate because the interlock will not clear | The restraint, the interlock, the leveler controls | One fault is showing up on a different machine | "Leveler's dead but the restraint is the problem" |
This page does not tell you how to free a stuck restraint, override an interlock, or get a trailer out. Do not do any of those things. Keep people clear of the gap between the trailer and the dock. Take the bay out of use through your facility's normal process, tell the driver and the yard, and describe the fault on the phone. A qualified provider inspects the restraint, its controls and anything electrical.
When the restraint is why the leveler will not work
On a lot of docks, the restraint, the lights, the leveler and sometimes the door all talk to each other. That is on purpose: the leveler is not supposed to come up until the trailer is secured, and the door is not supposed to close on a raised deck.
The side effect is that one failure shows up somewhere else. A restraint sensor that will not confirm engagement can leave a perfectly healthy leveler dead. A leveler stuck out of position can hold the restraint in place.
So say what else on that bay is misbehaving, even if it seems unrelated. "The restraint won't hook and the leveler won't come up" gets a provider to the bay with the right assumption. "The leveler's broken" sends them after the wrong machine.
What we cover here — and what we don't
In scope: trailer and vehicle restraints, their drives, controls, sensors, communication light sets and the interlocks tying them to levelers and doors, at warehouses, distribution centers, manufacturing plants, cold storage, food and beverage facilities and other commercial docks.
Not in scope, and here is who to call instead:
- Structural concrete, pit and slab work, including the dock face the restraint is bolted to → a concrete or general contractor.
- Anything on the trailer itself, including its cargo door, brakes or landing gear → a trailer service shop.
- Installed levelers → the leveler page. Standalone dock lights and chocks → the dock equipment page.
- Parts-only orders → a distributor.
- Residential, marine, storefront and gate work → those trades.
What to say when you call
Example wording for a first call. It is an example, not a script, and not a real job.
"The restraint on bay 9 won't release and the trailer can't leave our Salt Lake City dock — I can give you the address."
Three steps after you call
- You describe it. Facility location, which bay, whether a trailer is held right now.
- Your request may be shared. Calls may be shared with an independent commercial dock-and-door repair company.
- That company takes it from there. They confirm whether they can serve the address, what they can do, when, and what they charge — plus their own contract, work and warranty terms.
Useful, not required
Whether a trailer is at the bay. What the lights are showing inside and outside. Whether the leveler or the door is affected too. Whether the unit took a hit. Any access, badging or escort rules on site.
No checklist required. The facility address, the bay number, and "the restraint won't release" are enough.
If you reach voicemail, leave the facility address, the door or dock number if known, what's wrong, and a callback number.
What affects the price
We can't quote your exact restraint repair from a web page. The price depends on the unit, the fault, parts, and access. Here's what to ask before you authorize work.
Ask whether you are getting a call-out or diagnostic fee, a starting price, a scoped fixed price, an estimate or a final quote — and what is in it. On restraints the specific question worth asking is whether the controls, sensors and light set are inside the scope or quoted separately, because that is where the second invoice usually comes from.
| What drives it | Why it moves the number |
|---|---|
| Restraint type | Hook, wheel-based and barrier units are different machines |
| Mechanical, electrical or control fault | Three different scopes behind one symptom |
| Pull-away damage | Mounting and dock-face damage often come with it |
| Parts availability on older units | Discontinued models change lead time and sometimes the answer |
| Sensors, lights and interlocks | Their own wiring, their own trade |
| Trailer still in place | Working around a held trailer costs time and coordination |
| Access | Live dock, restricted hours, escort required |
Utah rules that affect this work
Electrical is the one to watch here. Restraints, their sensors and their light sets are powered, and electrical work sits under a separate Utah classification. A B100 General Building Contractor licence excludes electrical work; E200 is the electrical classification (Utah Admin. Code R156-55a-301). Even under the state's small-job licensing exemption, electrical work has to be done by a licensed electrical contractor where the project involves an electrical system (Utah Code § 58-55-305(1)(h)(ii)(A)). Ask who is doing the electrical part.
Who can do the work. Check the licence and classification in the DOPL lookup under "Verify a License." Utah contractor numbers end in -5501.
Permits come up on a replacement that touches the structure or the electrical supply. Ask the building official for your parcel: Salt Lake City Building Services, the Greater Salt Lake MSD, or the relevant city or Tooele County office. Checked September 17, 2026.
→ The full Salt Lake City licence and permit rundown
Where we take restraint calls
Facilities across Salt Lake and Tooele counties — Salt Lake City, Murray, West Valley City, South Salt Lake, West Jordan, Sandy, Taylorsville, Midvale, Draper, Magna, Kearns, Tooele, Grantsville and the surrounding communities. The independent provider confirms the facility address and whether it can take the job.
Local pages: West Valley City · Magna · West Jordan · South Salt Lake · Tooele · full service area
Questions about trailer restraints in Salt Lake City
The restraint will not release and the driver is waiting. What do we do?
Keep people clear of the gap between the trailer and the dock, take the bay out of use the way your facility normally does, and tell the driver and the yard. Then call and say a trailer is held. Do not try to free it, override the interlock, or work the trailer loose.
Can it be repaired without taking the bay out of service?
That is the provider's call once they see it, and it depends on the fault. Say whether the bay can be released and whether a trailer is in it — that shapes how they schedule it.
Our restraint works but the lights do not change. Is that the same repair?
Often it is the same visit, but it is a different fault. Sensors, controls and the light set are their own scope, and the electrical portion is its own trade. Say what the lights show inside and outside.
Do you work on the interlock between the restraint and the leveler?
Yes, that interlock is part of the restraint system conversation. Say which machines stopped working, because the fault is frequently not in the one that looks broken.
Get the trailer moving again
Tell us where the facility is, which bay, and whether a trailer is held.
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.
Salt Lake City dock and door repair · All Salt Lake City services · Service area · Call page · How Uptime works · About Uptime · Change service area · National loading dock repair overview
Sources
- Utah Admin. Code R156-55a-301 — contractor classifications, including the electrical exclusion. Checked September 17, 2026.
- Utah Code § 58-55-305 — exemptions from licensure and the electrical carve-out. Checked September 17, 2026.
- Utah Division of Professional Licensing. Checked September 17, 2026.
- Salt Lake City Building Services, Greater Salt Lake MSD, Tooele County building permits. Checked September 17, 2026.