What Is The Difference Between Grade 1 And Grade 2 Lumber
Species grade spacing and loads make a big difference when building with 2x8s or other dimensional lumber as does the use planned for the timber. Grade rules are intended to be the worst case allowable on a board - but NOT the entire order.
Waterproof Commercial Grade Rustic Wood Series Lightweight They Weigh Around One Lb Sq Ft Making It Easy For An Ind Wood Reclaimed Wood Stone Veneer Siding
Table R5075 of the 2018 IRC identifies beam spans for different joist lengths and Tables R6027 123 header spans.

What is the difference between grade 1 and grade 2 lumber. The result was 1 to 2 knots on every board and we had no recourse with a grade dispute. When interpreting grade rules this is where the integrity of the mill really comes into.
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