Many carpenters, me included, prefer to install upper-cabinet units first. The problem is that you must either deal with cumbersome temporary supports or simultaneously juggle cabinet boxes, screws, levels and drills. It can be a circus. To simplify the situation, I use a 3-ft. squeeze clamp and the adjustable clamp extension shown in the drawings below and right.
To install an upper cabinet, I begin by hoisting the box to the ceiling or valance with both hands. Then I reach with one hand for the adjustable cabinet jack, which I have left within easy reach leaning against the wall. Still holding the cabinet against the wall, I put the jack under the cabinet, and with my free hand, work the squeeze clamp until the box reaches the desired height. Centered under the box, with its leg angled outward, this jack provides all the support necessary to hold the cabinet in place while I tweak it into alignment. The clamp adjusts quickly to boxes of different dimensions, and its homemade base allows gross adjustments for different jobs.
David Carter, Victoria, None
