If step chocks are not available or not the correct size, how can vertical movement stabilization be achieved on an accident vehicle that ended up on its wheels?

If step chocks are not available or not the correct size, how can vertical movement stabilization be achieved on an accident vehicle that ended up on its wheels?

• A. One rescue lift airbag located on each side of the vehicle
• B. Box cribs of correct height
• C. Cribbing in front and back of wheels
• D. Two sets of wedges placed one upon the other

Answer: (B)

Stabilizing a vehicle on its wheels without step chocks relies on creating a solid, rigid base that won’t shift as rescue operations proceed. Box cribs of the correct height provide that kind of foundation: interlocking pieces form a stable, rectangular block under the vehicle or between load paths, distributing the weight and locking together so the vehicle can’t rise, drop, or tilt. This creates a dependable vertical support, giving rescuers a reliable platform to work from. Airbags can lift or push against the vehicle, but they are not as rigid or inherently stable for long-term vertical support and can shift or deflate under load. Wedges stacked on top of each other are prone to slipping or sudden movement and don’t offer the same solid, distributed support. Placing cribbing only in front and back of the wheels can help, but without a proper, interlocked base, vertical stabilization remains less secure than a well-built box crib system.

Stabilizing a vehicle on its wheels without step chocks relies on creating a solid, rigid base that won’t shift as rescue operations proceed. Box cribs of the correct height provide that kind of foundation: interlocking pieces form a stable, rectangular block under the vehicle or between load paths, distributing the weight and locking together so the vehicle can’t rise, drop, or tilt. This creates a dependable vertical support, giving rescuers a reliable platform to work from.

Airbags can lift or push against the vehicle, but they are not as rigid or inherently stable for long-term vertical support and can shift or deflate under load. Wedges stacked on top of each other are prone to slipping or sudden movement and don’t offer the same solid, distributed support. Placing cribbing only in front and back of the wheels can help, but without a proper, interlocked base, vertical stabilization remains less secure than a well-built box crib system.