Mechanical properties of Canadian coastal Douglas-fir and Hem-Fir

A testing program was conducted to investigate the modulus of etlasticity (MOE) and bending strength of Canadian coastal Douglas-fir and Hem-Fir timber. The two species were sampled in three sizes, i.e., 105 by 210 mm (4 by 8 inch), 105 by 305 mm (4 by 12 inch), and 305 by 305 mm (12 by 12 inch). MOE and bending strength were measured in a proof loading test. The proof load stress was intended to break approximately 15 percent of each sample. MOE and bending strength were adjusted to a standard moisture content of 15 percent during data analysis. The data developed in this study will be used to make technical submissions for review of the design properties currently assigned to coastal Douglas-fir and Hem-Fir.