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Component Manufacturing dverti$ dverti $ er
Don’t Forget! You Saw it in the
Adverti$$er
March 2024 #16296 Page #35
What is the Best Way to Handle Defects Under the Plated Area? By Glenn Traylor
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veryone who uses lumber in trusses understands that defects in lumber can impact truss performance in different ways. Some defects are not important but others will affect truss performance and can even cause truss failure.
In the first photo, the result of using a heavily waned floor truss web has yielded a serious manufacturing non-conformance that most likely would have resulted in failure. This truss was designed as a girder truss and once installed would carry multiple trusses and very high concentrated loads. Fortunately, an inspection caught this truss before it was shipped. In the second photo, a roof truss was on the table getting ready to be pressed. Most of the area under the connector was wane. The result would have been a significant loss of tooth count. The decision to use a web or replace the lumber needs to be made quickly and often. Without specific guidance, several things could happen, including •
Trusses are built with non-conformances that can result in failure, create call backs, and even cost you customers.
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Truss builders decide to cull any lumber with defects, resulting in a significant loss of profit due to the high cost of goods.
When properly trained, truss builders will make good decisions regarding wane. They will understand when to cull lumber and when to upsize the connector, which will reduce risk, maximize profits, streamline operations, and eliminate additional work.
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