When stacking air bags of different sizes, which bag should be placed on top?

• A. Larger bag goes on top
• B. Smaller bag goes on top
• C. They must be the same size on top
• D. There is no rule about size on top

Answer: (A)

Placing a larger air bag on top helps with stability and how the lift force is distributed. The top bag acts as the lift plate against the load, so a bigger top bag provides a larger contact area. That larger footprint helps center the lift, distributes pressure more evenly across the top surface, and resists lateral movement if the load shifts slightly during inflation. With a bigger top bag, the tendency for the stack to tilt or for the top bag to slip is reduced, which makes the overall lift steadier.

If the top bag were smaller, any misalignment or surface irregularity could concentrate pressure on a smaller area and make the stack more prone to tipping or slipping. Using similarly sized bags or a smaller top bag undermines the stability gained by this arrangement.