Logistics & Installation · SOP

Warehouse Receiving Dock Inspection And Trailer Chocking

Standard procedure for inspecting a receiving dock, verifying trailer stability, and properly applying wheel chocks before unloading operations. Reduces risk of dock accidents and ensures compliance with warehouse safety regulations.

Estimated Time
15 min
Difficulty
Intermediate
Regulation
CSA Z432 / OSHA 1910.178
Version
1.0
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Purpose

To establish a consistent, safe method for receiving dock inspection and trailer chocking that prevents accidental trailer separation during loading/unloading. This procedure minimizes injury risk, property damage, and cargo loss by ensuring every trailer is mechanically restrained and the dock leveler is properly engaged before personnel enter the trailer.

Scope

Applies to all warehouse receiving dock personnel including dock attendants, forklift operators, and supervisors at facilities with dock levelers. Covers standard box trucks, flatbeds, and semi-trailers with rear swing doors. Does not apply to rail car unloading or overhead crane operations.

Safety Precautions
  • LOTOPerform lockout/tagout on the dock leveler if maintenance is required. Never bypass safety interlocks.
  • PPEWear steel‑toed boots, high‑visibility vest, cut‑resistant gloves, and safety glasses. Hearing protection if noise level exceeds 85 dB.
  • TRAILERVerify trailer brakes are set and landing gear is fully down before approaching. Do not rely solely on wheel chocks — they are a secondary restraint.
  • SPACEKeep a minimum 3‑foot clearance behind the trailer during backing. No personnel between dock and trailer until chocks are placed.
Required Tools & Materials
  • Two heavy‑duty wheel chocks (rated for vehicle weight)
  • Dock leveler (push‑button or manual chain)
  • Trailer restraint system (if equipped – mechanical or magnetic)
  • High‑intensity flashlight (for dark trailers or night operations)
  • Dock inspection checklist (paper or digital)
  • Two‑way radio or hand signals communication device
  • Safety cones or barrier tape (if restricting access)

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Procedure: Step-by-Step
1 Pre‑arrival communication — Confirm ETA, load type, and any hazardous materials with dispatch. Assign a specific dock door and clear the area of personnel and obstructions.
2 Approach inspection — As the trailer backs into the dock, visually inspect the exterior for leaks, structural damage, and proper tire inflation. Verify the trailer parking brake is engaged and the landing gear is lowered and stable.
3 Position wheel chocks — Once the trailer is fully parked and brakes set, place a chock snugly against the rear side of both rear tires. Chocks must contact the tire tread and be seated firmly on the ground. Never chock the steer axle.
4 Engage dock leveler — Activate the dock leveler (push button or pull chain). Ensure the lip extends onto the trailer floor and the leveler is locked with a maximum incline of 10°. Do not override safety stops.
5 Open trailer doors safely — Stand clear of the swing path. Unlock and open doors slowly, securing them with door hooks or straps. Use a flashlight to inspect the load for shifting or damage.
6 Proceed with unloading — Operate pallet jack or forklift with caution. Keep dock leveler engaged and chocks in place until unloading is complete. Do not remove chocks while any equipment is inside the trailer.
7 Reverse procedure — After unloading, close and secure trailer doors. Retract dock leveler and visually confirm it has fully stowed. Remove chocks only after the driver signals readiness to depart. Store chocks in designated rack.

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