ABSTRACT
A problem often encountered while building scenery is the duplication of frames for identical units. Welding duplicate tube steel frames is doubly tricky because the distortion that occurs as the welds cool can easily pull a joint out of true. Single-purpose jigs like those typically nailed to a workbench do address the problem, of course; but they are not often intended to be reusable, and, once they’re installed, space on the workbench is frequently unavailable for other projects. The use of duplicating clamps like the one illustrated in Figure 1 offers a better solution. <sc>The</sc> <sc>Duplicating</sc> <sc>Clmp</sc> https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780080518565/add4c751-335b-4ee5-91d4-f532049b17e5/content/ch119_page240-01_B.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/>
