1996 LRFD Supplements - unprotected PDF - American Wood Council

GUIDELINELRFDTOSTRUCTURALLRFD FOR STRUCTURALLUMBER SUPPLEMENTCOMPOSITE LUMBER 7Table 3.1Reference Strengths for Mechanically Graded Dimension LumberDesign values in kips per square inch (ksi) 1Tension Compression ModulusBending parallel parallel of GradingSize to grain to grain Elasticity RulesGrade Classification E 05 E AgencyF b F t F c (5th pct) (mean)MACHINE STRESS RATED (MSR) LUMBER900f-1.0E 2.29 0.95 2.52 840 1000 WCLIB, WWPA1200f-1.2E 3.05 1.62 3.36 1010 1200 NLGA, SPIB, WCLIB, WWPA1350f-1.3E 3.43 2.03 3.84 1100 1300 NLGA, SPIB, WCLIB, WWPA1400f-1.2E 3.56 2.16 3.84 1010 1200 NLGA, SPIB1450f-1.3E 3.68 2.16 3.90 1100 1300 NLGA, WCLIB, WWPA1500f-1.3E 3.81 2.43 3.96 1100 1300 SPIB1500f-1.4E 3.81 2.43 3.96 1180 1400 NLGA, SPIB, WCLIB, WWPA1600f-1.4E 4.06 2.57 4.02 1180 1400 NLGA, SPIB1650f-1.3E 4.19 2.75 4.08 1100 1300 NLGA1650f-1.4E 4.19 2.75 4.08 1180 1400 SPIB1650f-1.5E 4.19 2.75 4.08 1270 1500 NLGA, SPIB, WCLIB, WWPA1800f-1.5E 4.57 3.51 4.20 1270 1500 NLGA, SPIB1800f-1.6E 4.57 3.17 4.20 1350 1600 NLGA, SPIB, WCLIB, WWPA1950f-1.5E 2" & less 4.95 3.71 4.32 1270 1500 SPIB1950f-1.7E 4.95 3.71 4.32 1430 1700 NLGA, SPIB, WWPA2000f-1.6E 5.08 3.51 4.38 1350 1600 NLGA, SPIB2100f-1.8E in thickness 5.33 4.25 4.50 1520 1800 NLGA, SPIB, WCLIB, WWPA2250f-1.6E 5.72 4.73 4.62 1350 1600 SPIB2250f-1.7E 5.72 4.73 4.62 1430 1700 NLGA, SPIB2250f-1.8E 5.72 4.73 4.62 1520 1800 NLGA2250f-1.9E 2" & wider 5.72 4.73 4.62 1600 1900 NLGA, SPIB, WWPA2400f-1.7E 6.10 5.20 4.74 1430 1700 SPIB2400f-1.8E 6.10 5.20 4.74 1520 1800 NLGA, SPIB2400f-2.0E 6.10 5.20 4.74 1690 2000 NLGA, SPIB, WCLIB, WWPA2550f-2.1E 6.48 5.54 4.86 1770 2100 NLGA, SPIB, WWPA2700f-2.2E 6.86 5.81 5.04 1860 2200 NLGA, SPIB, WCLIB, WWPA2850f-2.3E 7.24 6.21 5.16 1940 2300 NLGA, SPIB, WWPA3000f-2.4E 7.62 6.48 5.28 2020 2400 NLGA, SPIB3150f-2.5E 8.00 6.75 5.40 2110 2500 SPIB3300f-2.6E 8.38 7.16 5.58 2190 2600 SPIB3REFERENCE STRENGTHS900f-1.2E 2" & less 2.29 0.95 2.52 1010 2600 WCLIB1200f-1.5E in thickness 3.05 1.62 3.36 1270 2600 WCLIB1500f-1.8E 3.81 2.43 3.96 1520 2600 WCLIB1800f-2.1E 6" & wider 4.57 3.17 4.20 1770 2600 WCLIBNote 1. Design values for shear and for compression perpendicular to grain for mechanically graded lumber are species dependentand shall be obtained from Table 3.2 of this supplement, except:The compression perpendicular to grain design value for SPF MSR lumber with a grade E value of 2000 ksi and higheris 1.28 ksi.