Effect of Fabrication Variables on Critical Buckling Stress of Composite Lumber

Three fabrication variables–veneer species, veneer joints, and core joints–were tested for their effects on column critical buckling stress. Results indicated no significant difference (0.05 level) between yellow-poplar and southern pine veneers. Critical buckling stresses were significantly higher for veneer scarf joints compared with veneer butt joints, and for full-length cores compared with scarf-jointed cores. The Ylinen column formula was the best predictor of critical buckling stress.

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