Double Support Jack is made of two small and large arms, to be fixed on the back of wall frame and their duty is to control balance of frames. A type of this jack acts as load bearing structure in one-side framing and is used for bearing lateral force of concrete.
These jacks are connected to soldier and floor by shafts in the beginning and end [terminal] parts. Double Support Jack is double-screw types and is made of pipes in mid part; and, left turn-right turn threaded flange at the end, which makes it possible to adjust the length of the two screws and control the balance and straightness with precision.