Trailer Wheel Chocks

Why Loading Docks Use Wheel Chocks

Wheel chocks supplement a trailer’s parking brake by helping limit movement while forklifts enter and exit the trailer. Properly selected and positioned chocks can help address trailer creep, premature departure, and separation between the trailer and loading dock.

Trailer creep, also called dock walk, is the gradual movement of a trailer away from the loading dock during repeated forklift travel. Premature departure occurs when a trailer moves away while loading or unloading is still underway.

Wheel Chock Materials

Different materials serve different environments and operating conditions.

Rubber Wheel Chocks

Rubber chocks are durable, economical options commonly used at enclosed loading docks and indoor warehouse facilities. Multiple sizes are available to accommodate different trailer tires and dock conditions.

Urethane Wheel Chocks

Urethane chocks are lightweight and suited to outdoor or weather-exposed applications. The analyzed products are positioned for environments where resistance to moisture, impact, and corrosive materials is important.

Aluminum Wheel Chocks

Aluminum chocks are lightweight and non-sparking. They may be appropriate where spark resistance is required, although facilities should verify the selected product and site requirements before use in a hazardous environment.

Laminated Wheel Chocks

Poweramp laminated wheel chocks use fiber-reinforced rubber pads assembled on steel bolts and compressed between steel plates. This heavy-duty construction is designed to provide holding power on hard loading-dock surfaces.

Pyramid vs. Wedge Wheel Chocks

Pyramid-style chocks are symmetrical and reversible, allowing either side to be positioned against the tire. Wedge-style chocks have a curved or concave surface that follows the tire profile more closely. Both styles can be effective when properly sized and placed.

How to Size a Trailer Wheel Chock

For a standard truck or trailer tire, use this general sizing rule:

The chock should also be wide enough to provide appropriate contact with the tire tread. Surface condition, parking-area grade, tire dimensions, and the chock manufacturer’s recommendations should all be considered before selection.

For oversized or nonstandard vehicles, use the applicable vehicle and chock manufacturer specifications rather than relying solely on the one-quarter rule.

Chains, Holders, and Safety Signs

Attachment chains make chocks easier to retrieve and help keep them associated with the correct dock position. A wall-mounted wheel-chock holder provides a consistent storage location when the chock is not in use, reducing the chance of the chock being misplaced or left on the floor.

Wheel-chock caution signs can reinforce dock procedures by reminding drivers and dock personnel that chocks must be placed or removed at the appropriate stage of the loading process.

Wheel Chocks and OSHA Requirements

OSHA 29 CFR 1910.178(k)(1) states that highway-truck brakes must be set and wheel chocks placed under the rear wheels to prevent trucks from rolling while boarded by powered industrial trucks. When a trailer is not coupled to a tractor, 29 CFR 1910.178(m)(7) addresses brakes and wheel blocks during loading and unloading.

OSHA Instruction STD 01-11-007 permits an equivalent positive mechanical system to secure a truck or trailer when that equipment effectively prevents movement and is installed, maintained, and used according to the manufacturer’s recommendations.

Product selection alone does not establish complete workplace compliance. Facilities must also consider correct placement, employee training, inspection, maintenance, trailer conditions, and operating procedures.

Wheel Chocks vs. Vehicle Restraints

Wheel chocks and vehicle restraints address the same general hazard in different ways.

Wheel Chocks

• Manually placed against trailer tires
• Depend on proper sizing and positioning
• Provide a simple and economical solution
• Require consistent employee procedures

Vehicle Restraints

• Mechanically secure the trailer at the dock
• Reduce dependence on manual chock placement
• May integrate with dock communication systems
• Can serve as an equivalent mechanical securing system under the conditions identified by OSHA

For high-volume loading docks or facilities where manual chock placement has been inconsistent, explore Dock and Truck Restraints and Barron Equipment’s existing Wheel Chocks vs. Vehicle Restraints guide.

Frequently Asked Questions

What are trailer wheel chocks?

Trailer wheel chocks are wedge-shaped blocks placed against trailer tires to help prevent movement during loading and unloading. They supplement the vehicle’s parking brake and must be properly sized and positioned for the application.

What OSHA requirement applies to wheel chocks?

OSHA 29 CFR 1910.178(k)(1) requires highway-truck brakes to be set and wheel chocks placed under the rear wheels while the truck is boarded by powered industrial trucks. OSHA guidance permits a positive mechanical securing system under specified conditions.

What is trailer creep?

Trailer creep is the gradual movement of a trailer away from the loading dock during repeated forklift travel. This movement can create separation between the trailer and the dock.

What is the difference between pyramid and wedge chocks?

Pyramid chocks are symmetrical and reversible. Wedge chocks use a curved or concave face designed to follow the tire profile.

How do I choose the right wheel-chock size?

A common guideline is to select a chock with a height equal to approximately one-quarter of the tire height. Tire width, surface condition, grade, vehicle type, and manufacturer recommendations must also be considered.

Which wheel-chock material should I choose?

Rubber suits many indoor docks, urethane supports weather-exposed applications, aluminum provides a lightweight non-sparking option, and laminated rubber provides reinforced construction for heavy-duty use.

Why use a wall-mounted chock holder?

A wall-mounted holder keeps the chock and chain in a consistent location, helps prevent loss, and reduces the chance of equipment being left on the dock floor.

What is the difference between wheel chocks and vehicle restraints?

Wheel chocks use friction and manual placement against the tires. Vehicle restraints create a positive mechanical connection between the trailer and loading dock.

Trailer Wheel Chock Selection

Barron Equipment helps warehouses, manufacturers, distribution centers, and commercial facilities compare wheel chocks based on tire size, trailer type, surface conditions, parking-area grade, material, and dock procedures.

Shop standard wheel chocks and accessories online or request a quote for product-selection assistance and heavy-duty applications.