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an organizer. But if a special framing detail requires several sizes of screws as well as nails, the tool belt no longer has sufficient pouches, and the carpenter's efficiency drops off.

2. In an operation such as installing aluminum curtain wall mullions, the installer may need one or more wrenches, one or more screwdrivers, a rubber mallet, a tool for inserting rubber gasketing, a level, a tape measure, and a large variety of parts: mullion sections, connecting angles, shims, bolts, screws, and gasketing. The number of these different parts and tools should be kept to a minimum. It is especially important to avoid parts that differ so little from one another that they can be confused easilv, such j *

as 1" long and 1W long screws of the same diameter and head stvlc.

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