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Design Values for Moduli of Rigidity and Elasticity Comparison Between Concentrated and Uniformly
according to equation allowable stress apparent moduli ASTM bending tests axis beam deﬂection beam tests compression test compression-parallel-grain tests computed concentrated and uniformly deﬁned deﬂection due Deﬂection in Timber DESIGN PROCEDURE design values Douglas ﬁr due to shear Eulerís equation ﬁrst ﬁxation ﬂexural members ﬂexure tests Forest Products Laboratory FPL Reports grain direction intermediate and long intermediate columns isotropic material loaded at mid-point long columns mid-point loading modulus of elasticity modulus of rigidity National Design Speciﬁcation observed data orthotropic materials percent Purdue University reduction factor rigidity to modulus select-structural Shear deﬂection accounts shear deﬂection component shear force shear stress signiﬁcant simple beams simply supported beams SLENDERNESS RATIO span span-depth ratios Speciﬁcation for Stress-Grade Strength of Materials Stress-Grade Lumber structural design tests were conducted Theory of Elasticity Timber Beams TIMBER COLUMNS total deﬂection true modulus two-point loading uniformly distributed loads values for modulus western hemlock Wood Columns