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Component Manufacturing dverti$ dverti $ er
Don’t Forget! You Saw it in the
July 2022 #14276 Page #39
Adverti$$er
What are the Minimum Grade Requirements for Lumber When Manufacturing Components? By Glenn Traylor
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ith high lumber costs and volatile pricing, it is very reasonable to look for options to normal resources. Many fabricators and lumber manufacturers have been experimenting with using non-regular channels for lumber, including some choices that have created problems and issues with their finished products. These situations have resulted in a non-compliance relating to their quality assurance because they are not following Section 3.4 in ANSI/TPI 1–2014 that states, “Truss lumber shall be the size, species and grade specified on the truss design drawing.” Lumber may be substituted per Section 3.4.2, however, the substituted grade must meet 8 specific values. To determine if the substitution meets the requirements, values must be available explicitly for the substitution. One example of non-conformance is the use of non-graded lumber. The lumber in the photo has a stamp, but this is not a lumber grade stamp. It simply states that this lumber has been heattreated. The stamp lacks a grade with species/ species grouping.
The next photo is of several units of lumber purchased to be used as webbing in roof and floors. It indicates the lumber is “SPEC,” which according to the manufacture means “There is no grade.”
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