When placing an air bag on a box crib, the layer of cribbing in contact with the bag should be:

When placing an air bag on a box crib, it is essential that the layer of cribbing in contact with the bag is a solid layer of cribs. This configuration provides a stable and uniform surface for the air bag to rest upon, ensuring that the weight and pressure exerted by the load are distributed evenly across the entire surface area of the bag. A solid layer minimizes the risk of the air bag shifting or collapsing, which could lead to instability and compromise safety during operation.

Using a solid layer of cribbing also enhances the overall strength and support provided to the air bag. If the cribbing were to be insufficiently structured or spaced unevenly, it could result in point loads on the air bag, increasing the chance of the air bag failing to perform correctly in the rescue operation. Therefore, utilizing a solid layer directly under the air bag is crucial for maximizing safety and operational effectiveness in vehicle rescue scenarios.