Disposable mechanical jack, suitable for loading new building underpinnings and thereby preventing the inevitable structural settling

摘要

The jack comprises the screw with hexagonal head 3, a nut 4, a support tube 5 and a base 6, all made of steel. It is used between the old foundation of reinforced cement 1 and the new foundation of reinforced cement 2 by turning the nut 4 and holding the parts 3, 5, 6 stationary. IMAGE