Effect of Joints on Bending Strength and Stiffness of Composite Truss Lumber

Two types of flakeboard core materials, two veneer species, and five joint conditions were evaluated for their effects on modulus of elasticity (MOE) and modulus of rupture (NOR) of composite truss lumber. A butt joint in the flakeboard core reduced strength and stiffness more than a butt joint in the veneer or a scarf joint in the core. No statistically significant differences in strength or stiffness were found for type of flake-board core or veneer species.

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