lrfd 021 - LRFD STRUCTURAL LUMBER SUPPLEMENT Table 3.5...

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Unformatted text preview: LRFD STRUCTURAL LUMBER SUPPLEMENT Table 3.5 Reference Strengths for Visually Graded Decking Design values in trips per square inch (ksi) 1 Compression Modulus Bending perpendicular of Grading I Species and Size Single Repetitive to grain Elasticity Rules 1 commercial grade Classification Member Member E Agency I Fb Cr Fb Ft; (mean) BALSAM FIR Select 2"—4" thick 4.19 1500 NELMA Commercial 4"-12" wide 3.56 1300 :D COAST SITKA SPRUCE % Select 2"—4" thick 3.18 3.55 0.95 1700 . NLGA g Commercial 6" 8: wider 2.67 3.07 0.95 1500 g COAST SPECIES 0 Commercial 6“ & wider 2.67 3.07 0.77 1400 -l DOUGLAS FIR-LARCH a Select Dex 2"-4" thick 4.45 5.11 1800 WCLIB 3 Commercial Dex 6“-8" wide 3.68 4.24 1,30 1700 ”'1 Commercial 4“—1 2" wide 3,68 4.24 1.30 1700 DOUGLAS FIR-LARCH (NORTH) I Select 2"-4" thick 4.45 5.11 NLGA i Commercial 5" a. wider 3.68 4.24 1.30 1700 ! DOUGLAS FIR-SOUTH Selected 2"—4" thick 4.45 5.11 1.08 1400 WWPA Commercial 4"-12" wide 3.56 4,09 1.08 . 1300 EASTERN HEMLOCK-TAMARACK Select 2"—4" thick -- 1300 NELMA Commercial 41-12" wide - 3.68 1100 Select Commercial EASTERN SPRUCE Select Commercial EASTERN WHITE PINE Select Commercial EASTERN WHITE PINE (NORTH) Select Commercial HEM-FIR . Select Dex Commercial Dex Selected Commercial HEM-FIR (NORTH) Select Commercial EASTERN HEMLOCK-TAMARACK (NORTH) 2"4" thick 4 3.81 4.38 1.15 1300 NLGA 6" 8: wider 3.18 3.65 1.15 1100 3.30 1500 2.79 1400 3.30 1200 2.79 1100 2.29 2.63 0.73 1200 NLGA 1.97 2.26 0.73 1100 3.56 4.09 0.84 1500 WCLIB 2.92 3.36 0.84 1400 2"-4" thick NELMA 4"—12" wide 2"—4" thick NELMA 4"—12" wide 2"-4" thick 5" 8: wider 2"-4" thick 8"-B" wide 2"—4" thick 3.55 4.09 0.84 1500 WWPA 4"-1 2" wide 2.92 3.36 0.84 1400 2"-4“ thick 3.43 6" & wider 2 79 3.94 0.77 1500 NLGA 3.21 0.77 1400 . ...
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