1996 LRFD Supplements - unprotected PDF - American Wood Council

GUIDELINELRFDTOSTRUCTURALLRFD FOR STRUCTURALLUMBER SUPPLEMENTCOMPOSITE LUMBER1717Table 3.2Reference Strengths for Visually Graded Dimension LumberDesign values in kips per square inch (ksi) 1Tension Shear Compression Compression ModulusBending parallel parallel perpendicular parallel of GradingSpecies and Size to grain to grain to grain to grain Elasticity Rulescommercial grade Classification E 05 E AgencyF b F t F v F c β F c (5th pct) (mean)WESTERN CEDARSSelect Structural 2.54 1.62 0.22 0.88 2.40 670 1100No. 1 2"-4" thick 1.84 1.15 0.22 0.88 1.98 610 1000No. 2 1.78 1.15 0.22 0.88 1.56 610 1000No. 3 2" & wider 1.02 0.68 0.22 0.88 0.90 550 900 WCLIBStud 1.40 0.88 0.22 0.88 0.96 550 900 WWPAConstruction 2"-4" thick 2.03 1.28 0.22 0.88 2.04 550 900Standard 1.14 0.74 0.22 0.88 1.56 490 800Utility 2"-4" wide 0.57 0.34 0.22 0.88 1.02 490 800WESTERN WOODSSelect Structural 2.22 1.08 0.20 0.70 2.52 730 1200No. 1 2"-4" thick 1.65 0.81 0.20 0.70 2.22 670 1100No. 2 1.65 0.74 0.20 0.70 2.10 610 1000No. 3 2" & wider 0.95 0.47 0.20 0.70 1.20 550 900 WCLIBStud 1.27 0.61 0.20 0.70 1.32 550 900 WWPAConstruction 2"-4" thick 1.84 0.88 0.20 0.70 2.52 610 1000Standard 1.02 0.47 0.20 0.70 2.16 550 900Utility 2"-4" wide 0.51 0.20 0.20 0.70 1.44 490 800WHITE OAKSelect Structural 3.05 1.89 0.32 1.66 2.64 670 1100No. 1 2"-4" thick 2.22 1.35 0.32 1.66 2.16 610 1000No. 2 2.16 1.35 0.32 1.66 1.68 550 900No. 3 2" & wider 1.21 0.74 0.32 1.66 0.96 490 800 NELMAStud 1.65 1.01 0.32 1.66 1.08 490 800Construction 2"-4" thick 2.41 1.49 0.32 1.66 2.22 550 900Standard 1.33 0.88 0.32 1.66 1.74 490 800Utility 2"-4" wide 0.64 0.41 0.32 1.66 1.14 490 800YELLOW POPLARSelect Structural 2.54 1.55 0.22 0.87 2.16 910 1500No. 1 2"-4" thick 1.84 1.15 0.22 0.87 1.74 850 1400No. 2 1.78 1.08 0.22 0.87 1.38 790 1300No. 3 2" & wider 1.02 0.61 0.22 0.87 0.78 730 1200 NSLBStud 1.40 0.88 0.22 0.87 0.84 730 1200Construction 2"-4" thick 2.03 1.28 0.22 0.87 1.80 790 1300Standard 1.14 0.68 0.22 0.87 1.38 670 1100Utility 2"-4" wide 0.51 0.34 0.22 0.87 0.90 670 11003REFERENCE STRENGTHSNotes:1. Design values for all grades are based on a 12" nominal depth with the exception of Stud Grade (6" nominal depth), andConstruction, Standard and Utility Grades (4" nominal depth). See Section 4.2 of this Supplement.2. Size adjustment factors have already been incorporated in the tabulated design values for most thicknesses ofSouthern Pine and Mixed Southern Pine dimension lumber. See Section 4.2 of this Supplement.