[Rick TYler]

There are lifting bags used by first responders that are rated for 125psi -- twice the allowable pressure used for FIRST devices. These are manufactured by companies who know that their products are used in life-or-death situations, and that someone might be underneath the structures held up by the bags. They may be against the rules, but it would not be fair to imply that they are in any way unsafe, especially at 60psi.