What does a four-point crib provide support for?

A four-point crib provides support at specific points to stabilize a vehicle during extrication operations. By positioning cribbing under both the front and rear wheel wells—specifically aft of the front wheel well and forward of the rear wheel well—the cribbing creates a secure base that prevents the vehicle from shifting or rolling while rescuers are working around it. This setup effectively distributes the vehicle’s weight and minimizes the risk of collapse or movement, which is crucial for both the safety of the victims inside the vehicle and the rescuers performing the extrication.

The other options would not provide adequate support for the entire vehicle. Limiting support to only the rear or front of the vehicle does not account for the stability needed during rescue operations, and claiming support from only the right and left sides may not ensure structural integrity as effectively as the four-point cribbing configuration does. Therefore, the four-point crib supports the vehicle by ensuring stability around critical weight-bearing points.