A method is described to determine the distribution of the bending stresses in a wood beam when some of these stresses exceed the proportional limit. This is used to calculate the position of the neutral axis and the bending strength of some Douglas-fir beams. The calculated values agreed with the...
Heartwood samples of Pacific Coastal Douglas-fir (Pseudotsuga
menziesii var. menziesii) and Rocky Mountain Douglas-fir
(Pseudotsuga menziesii var. glauca) were rated for relative liquid
permeability, and evaluated for kraft pulping characteristics.
Highly impermeable wood of the Rocky Mountain variety was termed
"refractory," while the pervious wood of the Pacific Coastal variety...