Abstract:
To test the effects of kiln-drying on strength properties of
Douglas fir and western hemlock, temperatures to 230 F, conditions
for equilibrium moisture contents of 6 percent and 12 percent, and
prolonged heating were investigated.
Prolonged heating and choice of conditions for 6 percent or 12
percent equilibrium moisture content had little effect on most strength
properties.
Temperature was important: the higher the temperature, the
greater the reduction in strength. Toughness was affected most, shear
almost as much, modulus of rupture and fiber stress at the proportional
limit somewhat less, and modulus of elasticity was affected least.
