This analysis reveals the physical properties, including specific gravity and modulus of rupture, of second-growth Douglas-fir timber, indicating its potential in comparison to old-growth timber.
Increasing use of second-growth Douglas-fir focuses interest on the physical properties of such wood in relation to those of old-growth timber. Test data are presented on specific gravity, modulus of rupture, and modulus of elasticity of wood samples sawn from various heights and radial zones from three sample second-growth trees grown on Sites II, III, and IV.
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Wangaard et al. (1949) studied this question.
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