2001 ASD Supplements - unprotected PDF - American Wood Council

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L-54 SPAN TABLES7.2 Species Specific Span TablesThe tables in this Section provide joist and rafter spansfor design criteria listed at the top of each table. Thesespan tables are based on the most commonly availablesoftwood lumber species used in construction and include:• Douglas Fir-Larch• Hem-Fir• Southern Pine• Spruce-Pine-FirTables have been developed for the following applications:Applications Live Load (psf) Dead Load (psf) Deflection Limit Table No.Floor joists 40 10 & 20 Span/360 7.10Ceiling joists 20 10 Span/240 7.11Rafters 20 10 & 20 Span/240 7.12AMERICAN WOOD COUNCIL
<strong>ASD</strong> STRUCTURAL LUMBER SUPPLEMENTL-55Table 7.10Floor Joist Spans for Common Lumber Species(Residential Areas, Live Load = 40 psf, L/∆ = 360)∆Dead Load = 10 psfDead Load = 20 psf2x6 2x8 2x10 2x12 2x6 2x8 2x10 2x12Maximum Floor Joist SpansJoist Spacing Species and Grade (ft.-in.) (ft.-in.) (ft.-in.) (ft.-in.) (ft.-in.) (ft.-in.) (ft.-in.) (ft.-in.)12 in.16 in.19.2 in.24 in.Douglas Fir-Larch SS 11 - 4 15 - 0 19 - 1 23 - 3 11 - 4 15 - 0 19 - 1 23 - 3Douglas Fir-Larch #1 10 - 11 14 - 5 18 - 5 22 - 0 10 - 11 14 - 2 17 - 4 20 - 1Douglas Fir-Larch #2 10 - 9 14 - 2 18 - 0 20 - 11 10 - 8 13 - 6 16 - 5 19 - 1Douglas Fir-Larch #3 8 - 11 11 - 3 13 - 9 16 - 0 8 - 1 10 - 3 12 - 7 14 - 7Hem-Fir SS 10 - 9 14 - 2 18 - 0 21 - 11 10 - 9 14 - 2 18 - 0 21 - 11Hem-Fir #1 10 - 6 13 - 10 17 - 8 21 - 6 10 - 6 13 - 10 17 - 1 19 - 10Hem-Fir #2 10 - 0 13 - 2 16 - 10 20 - 4 10 - 0 13 - 1 16 - 0 18 - 6Hem-Fir #3 8 - 8 11 - 0 13 - 5 15 - 7 7 - 11 10 - 0 12 - 3 14 - 3Southern Pine SS 11 - 2 14 - 8 18 - 9 22 - 10 11 - 2 14 - 8 18 - 9 22 - 10Southern Pine #1 10 - 11 14 - 5 18 - 5 22 - 5 10 - 11 14 - 5 18 - 5 22 - 5Southern Pine #2 10 - 9 14 - 2 18 - 0 21 - 9 10 - 9 14 - 2 16 - 11 19 - 10Southern Pine #3 9 - 4 11 - 11 14 - 0 16 - 8 8 - 6 10 - 10 12 - 10 15 - 3Spruce-Pine Fir SS 10 - 6 13 - 10 17 - 8 21 - 6 10 - 6 13 - 10 17 - 8 21 - 6Spruce-Pine Fir #1 10 - 3 13 - 6 17 - 3 20 - 7 10 - 3 13 - 3 16 - 3 18 - 10Spruce-Pine Fir #2 10 - 3 13 - 6 17 - 3 20 - 7 10 - 3 13 - 3 16 - 3 18 - 10Spruce-Pine Fir #3 8 - 8 11 - 0 13 - 5 15 - 7 7 - 11 10 - 0 12 - 3 14 - 3Douglas Fir-Larch SS 10 - 4 13 - 7 17 - 4 21 - 1 10 - 4 13 - 7 17 - 4 21 - 1Douglas Fir-Larch #1 9 - 11 13 - 1 16 - 5 19 - 1 9 - 8 12 - 4 15 - 0 17 - 5Douglas Fir-Larch #2 9 - 9 12 - 9 15 - 7 18 - 1 9 - 3 11 - 8 14 - 3 16 - 6Douglas Fir-Larch #3 7 - 8 9 - 9 11 - 11 13 - 10 7 - 0 8 - 11 10 - 11 12 - 7Hem-Fir SS 9 - 9 12 - 10 16 - 5 19 - 11 9 - 9 12 - 10 16 - 5 19 - 11Hem-Fir #1 9 - 6 12 - 7 16 - 0 18 - 10 9 - 6 12 - 2 14 - 10 17 - 2Hem-Fir #2 9 - 1 12 - 0 15 - 2 17 - 7 8 - 11 11 - 4 13 - 10 16 - 1Hem-Fir #3 7 - 6 9 - 6 11 - 8 13 - 6 6 - 10 8 - 8 10 - 7 12 - 4Southern Pine SS 10 - 2 13 - 4 17 - 0 20 - 9 10 - 2 13 - 4 17 - 0 20 - 9Southern Pine #1 9 - 11 13 - 1 16 - 9 20 - 4 9 - 11 13 - 1 16 - 4 19 - 6Southern Pine #2 9 - 9 12 - 10 16 - 1 18 - 10 9 - 6 12 - 4 14 - 8 17 - 2Southern Pine #3 8 - 1 10 - 3 12 - 2 14 - 6 7 - 4 9 - 5 11 - 1 13 - 2Spruce-Pine Fir SS 9 - 6 12 - 7 16 - 0 19 - 6 9 - 6 12 - 7 16 - 0 19 - 6Spruce-Pine Fir #1 9 - 4 12 - 3 15 - 5 17 - 10 9 - 1 11 - 6 14 - 1 16 - 3Spruce-Pine Fir #2 9 - 4 12 - 3 15 - 5 17 - 10 9 - 1 11 - 6 14 - 1 16 - 3Spruce-Pine Fir #3 7 - 6 9 - 6 11 - 8 13 - 6 6 - 10 8 - 8 10 - 7 12 - 4Douglas Fir-Larch SS 9 - 8 12 - 10 16 - 4 19 - 10 9 - 8 12 - 10 16 - 4 19 - 6Douglas Fir-Larch #1 9 - 4 12 - 4 15 - 0 17 - 5 8 - 10 11 - 3 13 - 8 15 - 11Douglas Fir-Larch #2 9 - 2 11 - 8 14 - 3 16 - 6 8 - 5 10 - 8 13 - 0 15 - 1Douglas Fir-Larch #3 7 - 0 8 - 11 10 - 11 12 - 7 6 - 5 8 - 2 9 - 11 11 - 6Hem-Fir SS 9 - 2 12 - 1 15 - 5 18 - 9 9 - 2 12 - 1 15 - 5 18 - 9Hem-Fir #1 9 - 0 11 - 10 14 - 10 17 - 2 8 - 9 11 - 1 13 - 6 15 - 8Hem-Fir #2 8 - 7 11 - 3 13 - 10 16 - 1 8 - 2 10 - 4 12 - 8 14 - 8Hem-Fir #3 6 - 10 8 - 8 10 - 7 12 - 4 6 - 3 7 - 11 9 - 8 11 - 3Southern Pine SS 9 - 6 12 - 7 16 - 0 19 - 6 9 - 6 12 - 7 16 - 0 19 - 6Southern Pine #1 9 - 4 12 - 4 15 - 9 19 - 2 9 - 4 12 - 4 14 - 11 17 - 9Southern Pine #2 9 - 2 12 - 1 14 - 8 17 - 2 8 - 8 11 - 3 13 - 5 15 - 8Southern Pine #3 7 - 4 9 - 5 11 - 1 13 - 2 6 - 9 8 - 7 10 - 1 12 - 1Spruce-Pine Fir SS 9 - 0 11 - 10 15 - 1 18 - 4 9 - 0 11 - 10 15 - 1 17 - 9Spruce-Pine Fir #1 8 - 9 11 - 6 14 - 1 16 - 3 8 - 3 10 - 6 12 - 10 14 - 10Spruce-Pine Fir #2 8 - 9 11 - 6 14 - 1 16 - 3 8 - 3 10 - 6 12 - 10 14 - 10Spruce-Pine Fir #3 6 - 10 8 - 8 10 - 7 12 - 4 6 - 3 7 - 11 9 - 8 11 - 3Douglas Fir-Larch SS 9 - 0 11 - 11 15 - 2 18 - 5 9 - 0 11 - 11 15 - 0 17 - 5Douglas Fir-Larch #1 8 - 8 11 - 0 13 - 5 15 - 7 7 - 11 10 - 0 12 - 3 14 - 3Douglas Fir-Larch #2 8 - 3 10 - 5 12 - 9 14 - 9 7 - 6 9 - 6 11 - 8 13 - 6Douglas Fir-Larch #3 6 - 3 8 - 0 9 - 9 11 - 3 5 - 9 7 - 3 8 - 11 10 - 4Hem-Fir SS 8 - 6 11 - 3 14 - 4 17 - 5 8 - 6 11 - 3 14 - 4 16 - 10Hem-Fir #1 8 - 4 10 - 10 13 - 3 15 - 5 7 - 10 9 - 11 12 - 1 14 - 0Hem-Fir #2 7 - 11 10 - 2 12 - 5 14 - 4 7 - 4 9 - 3 11 - 4 13 - 1Hem-Fir #3 6 - 2 7 - 9 9 - 6 11 - 0 5 - 7 7 - 1 8 - 8 10 - 1Southern Pine SS 8 - 10 11 - 8 14 - 11 18 - 1 8 - 10 11 - 8 14 - 11 18 - 1Southern Pine #1 8 - 8 11 - 5 14 - 7 17 - 5 8 - 8 11 - 3 13 - 4 15 - 11Southern Pine #2 8 - 6 11 - 0 13 - 1 15 - 5 7 - 9 10 - 0 12 - 0 14 - 0Southern Pine #3 6 - 7 8 - 5 9 - 11 11 - 10 6 - 0 7 - 8 9 - 1 10 - 9Spruce-Pine Fir SS 8 - 4 11 - 0 14 - 0 17 - 0 8 - 4 11 - 0 13 - 8 15 - 11Spruce-Pine Fir #1 8 - 1 10 - 3 12 - 7 14 - 7 7 - 5 9 - 5 11 - 6 13 - 4Spruce-Pine Fir #2 8 - 1 10 - 3 12 - 7 14 - 7 7 - 5 9 - 5 11 - 6 13 - 4Spruce-Pine Fir #3 6 - 2 7 - 9 9 - 6 11 - 0 5 - 7 7 - 1 8 - 8 10 - 1Check sources for availability of lumber in lengths greater than 20 feet.7SPAN TABLESAMERICAN FOREST & PAPER ASSOCIATION
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SUPPLEMENTStructural LumberASDALLOW
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SUPPLEMENTStructural LumberASDALLOW
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ASD WOOD STRUCTURAL FRAME CONSTRUCT
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ASD STRUCTURAL LUMBER SUPPLEMENTL-1
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GL-56OTHER CONSIDERATIONS6.1 Genera
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GL-60OTHER CONSIDERATIONSAMERICAN W
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GL-62LOAD AND SPAN TABLES7.1 Genera
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GL-78DESIGN EXAMPLES8.1 GeneralGene
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SP-20DESIGN ADJUSTMENT FACTORS4.1 G
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