In this study, straight-grain Douglas-fir 2-ply test strips tested in tension required an n of 1.5, angled veneers required an n of 1.2, birch veneers required an n of 1.05, and thick high-strength oriented strandboard and strand lumber composites tested for MOR (Figs. 14 and 15) required an n of 0.96 for the product made of 0.125-- inch-thick veneer strands and an n of 0.9 for the product made with 0.02-inch face and 0.04-inch core waferized aspen strands