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Component Manufacturing dverti$ dverti $ er
Don’t Forget! You Saw it in the
July 2021 #13264 Page #43
Adverti$$er
Is One Cut the Same as Two? By Glenn Traylor
O
n a recent plant visit, we came across a situation that is hopefully rare. The truss builders had hand-cut floor truss webs at the table in several places because the webs provided with the cutting were mis-cut. The result: a truss that might “look” okay but would not be safe to use.
In this case, the webs (on the left in Figure 1) were cut too short for the set-up. Instead of following the cutting information, however, the builders at the table took a short cut, literally. Instead of double-cutting the floor truss web as per the design, they single-cut the web to fit. Their skill cutting the web to a very tight fit was impressive, but unfortunately their single-cut rather than the design double-cut created a totally different design. (See Figure 2 for diagram of cut type terminology.) To run this web single-cut, the truss should have been redesigned accordingly, so the connectors and loads could be calculated properly.
Figure 1. Photo of single-cut of web.
Figure 2. Terminology of cut types.
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