Guidelines

These guidelines provide general procedures for the safe selection, placement, and maintenance of wheel chocks used in commercial, industrial, aviation, and service environments. Always follow your company’s safety program and site-specific requirements.

1. When Chocks Should Be Used

• During loading and unloading operations
• When a vehicle is parked on any grade
• During maintenance or inspection
• When a vehicle is being jacked or lifted
• Whenever unintended movement could create a hazard

2. Number of Chocks Required

• Minimum of one per wheel on level surfaces (per site procedure)
• Both sides of the wheel on slopes or when required by SOP
• Aircraft and GSE: fore and aft placement per ramp procedure

3. Placement Procedure

• Place in the direction of potential movement
• Ensure full ground contact
• Remove debris before placement
• Do not place against the sidewall

4. Size & Material Selection

• Select based on tire diameter and vehicle weight
• Use high-traction materials for smooth or wet surfaces
• Use larger chocks for heavy equipment and high-load conditions
• Ensure visibility in active traffic or ramp areas

5. Inspection Requirements

• Inspect before each use
• Remove from service if cracked, hardened, or excessively worn
• Verify rope or chain is secure and functional
• Check for contamination from oil, fuel, or chemicals

6. Removal Procedure

• Confirm the vehicle is secure and authorized to move
• Remove chocks from the safe side of the wheel
• Store in designated location after use
• Never leave chocks in traffic paths

7. Storage

• Store in a clean, dry area
• Keep out of prolonged direct sunlight when possible
• Do not stack in a way that causes deformation

8. Training

• Personnel should be trained in proper placement and removal
• Follow site-specific lockout or ramp procedures
• Use only approved chocks for the application