The scissor-like tool illustrated here can be useful in plumbing and aligning stud walls during framing. With it, a worker can exert and maintain great pressure against a wall while another worker nails bracing to hold the wall in its correct position.
The scissor can be assembled quickly on the job site from a pair of 8-ft. 2x4s and a 3/8-in. by 4-in. machine bolt. The proportions shown in the illustration are only approximate; I usually trim off one end or the other until the tool feels right and gives the best leverage.
To use the scissor for plumbing a wall, tack a cleat to the subfloor about 6 ft. from the bottom plate and place the foot of the tool against it. Next, open the arms of the scissor until its raised end can be firmly wedged against the top plate of the stud wall. By pressing down on the tool’s handle, you will increase its span and force the top of the wall away from you. Fine adjustments can be made by altering the pressure on the handle.
Malcolm McDaniel, Berkeley, CA