I donated to the earthquake lifting pad can be a weight of 14 tons from the top. 
 Lifting cushion Lifting powerful, not afraid of rolling, flexible, suitable for all kinds of complicated situations of the heavy lifting, self-help vehicles, missiles, launch vehicles and car tune equality, especially in places inconvenient to use the jack, from weight lifting pad is a ideal tool. Lifting pad thickness is only 2cm, can use a very small gap between the heavy lifting cushion stuffing. When accidents, collapsed buildings or vehicles stalled, snow pits, it will be placed in the collapsed objects, lifting pads, wheels or the frame below, with the brake pump or air compressor, pump, high pressure gas cylinders to the air bag charge gas, air bag pressure is 0.6MPa, increased to 30cm, the effect of gravity to 13000kg. Balloon inflated to inflate the tire as easy as. 

 For larger lifting height can be used both air bags superposition