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With top and bottom plates measuring 1/2" x 9" x 9" for support, the Acme Screw is 2 and a 1/2" in diameter and greased for easy turning and capable of extending a full 6". For extra leverage, a 1" steel rod can also be used when turning the screw. The Bridge Jack while weighing 60 lbs can support loads up to 80, 000 lbs.
The top plate has been attached to swivel freely, allowing the screw to be turned with ease. For added support, gussets on the top and the bottom plate have been added with full length welds.
With this kind of hardware, it's no surprise that the Bridge Jack can support loads up to 80, 000 pounds. A favorite of contractors, they fit directly under concrete slabs or beams in tight spots, as well as with timbers for shoring projects. Just install the Bridge Jack at its closed height of 13" and use the 6" of adjustment to screw it into position.
Bridge Jack
