Wheel chocks are a simple but critical safety tool used to prevent vehicles and heavy equipment from moving unexpectedly when parked. Even with the parking brake engaged, factors such as […]
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Wheel chocks are a simple but critical safety tool used to prevent vehicles and heavy equipment from moving unexpectedly when parked. Even with the parking brake engaged, factors such as vehicle weight, brake condition, or uneven terrain can cause a vehicle to roll. For county employees working around fleet vehicles and equipment, proper wheel chock selection and use support jobsite safety and loss prevention.
Wheel chocks work by blocking a tire to keep a vehicle stationary. Their effectiveness depends on correct sizing, placement, and condition. Guidance generally recommends selecting a chock about one-quarter the height of the tire for most applications. For light-duty vehicles on minimal slopes, smaller chocks—about one-sixth the tire height—may be sufficient. Heavier vehicles or those parked on grades require larger chocks for stability. Tire size is typically proportional to vehicle weight, making it a reliable reference point when choosing chocks.
When working on, around, or under vehicles, including during inspection and maintenance tasks, proper wheel chock use is essential to prevent unintended movement and protect personnel.
Routine inspection is also important. Wheel chocks should be checked for cracks, wear, or damage and replaced when needed. Employees should avoid driving over chocks, as this can compromise their effectiveness. Wheel chocks should be used in conjunction with other controls, including setting the parking brake, lowering equipment attachments, and following the manufacturer's guidance for securing vehicles.
Counties operate a wide range of vehicles and heavy equipment across departments, including road and bridge, utilities, fleet maintenance, and public safety. Because employees frequently work around parked vehicles and equipment, consistent wheel chock practices help reduce the risk of unintended movement.
Internal procedures should be reviewed to confirm when wheel chocks are required, particularly when vehicles are parked on grades, during roadside work, or when employees are working outside the cab. Ensuring appropriately sized wheel chocks are available in vehicles and equipment is an important first step. Tire size and vehicle weight should guide chock selection, and larger or multiple chocks may be appropriate for heavy or multi-axle equipment.
Training and reinforcement are also important. Employees should understand proper placement, the importance of using chocks in pairs, and the need to inspect chocks for wear or damage. Incorporating wheel chock use into job hazard analyses, safety meetings, and equipment checklists can help reinforce consistent practices across departments.
Periodic checks of fleet vehicles and equipment can help confirm that wheel chocks are present, visible, and in good condition. Replacing worn or damaged chocks and maintaining adequate inventory support safe field operations.
Wheel chocks are a small but essential safeguard that support safe parking and maintenance practices across county operations. By confirming proper sizing, availability, and consistent use, counties can help reduce the likelihood of preventable vehicle movement incidents. Reinforcing procedures and including wheel chocks in routine safety checks support employee safety and help protect county resources. Contact our Loss Control team at (303) 861-0507 for assistance with training guidance, procedures, and related support.
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