Solutions-manual-for-Design-of-Wood-Structures-ASDLRFD-6th-Edition - Chapter 2 Solutions Page 1 of 19 Download Full Solutions manual for Design of Wood

# Solutions-manual-for-Design-of-Wood-Structures-ASDLRFD-6th-Edition

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Chapter 2 SolutionsPage 1 of 19 Download Full Solutions manual for Design of Wood Structures-ASD/LRFD 6th Edition, at Problem 2.1a) See Appendix A and Appendix B for weights of roofing, sheathing, framing, insulation, and gypsum wallboard.Asphalt shingles= 2.0psf3/8 in. plywood sheathing(3/8 in.) (3.0 psf/in)= 1.1psf2x6 @ 16 in. o.c.= 1.4psfFiberglass loose insulation(5.5 in.) (0.5 psf/in)= 2.75 psfGypsum wallboard(1/2 in.) (5.0 psf/in)= 2.5psfRoof Dead Load (D) along roof slope= 9.75 psfConvert D to load on a horizontal plane:Roof slope = 3:12Hypotenuse = (9 + 144)½= 12.37Don horizontal plane= (9.75 psf) (12.37/12) = 10.1 psf[NOTE that this doesnotinclude an allowance for weight of re-roofing over existing roof. Foreach additional layer of shingles add 2.0 psf along roof slope, or (2.0 psf)(12.37/12)=2.1 psf on horizontal plane.]b)Wall Dead Load:Stucco (7/8 in.)= 10.0psf2x4 @ 16 in. o.c.=0.9psfGypsum wallboard (½ in.)=2.5psfWall Dead Load (D)= 13.4 psfc)Wall Dead Load:wall height = 8 ftD = (13.4 psf) (8 ft) = 107.2 lb/ftd)R1= 1.0since not considering tributary areaR2= 1.0for slope less than 4:12Basic Roof Live Load: Lr= 20 R1R2= 20 psfe)R1= 1.0since not considering tributary areaR2= 1.0for slope of 4:12Basic Roof Live Load: Lr= 20 R1R2= 20 psf______________________________________________________________________
Chapter 2 SolutionsPage 2 of 19Problem 2.2a) See Appendix A and Appendix B for weights of concrete roof tiles, lumber sheathing, and framing.Concrete tile(950 lb / 100 ft2) =9.5psf15/32 in. structural panel (plywood) sheathing(15/32) (3.0 psf/in.) =1.4psf2x8 @ 16 in. o.c.=1.9psfRoof Dead Load (D) along roof slope= 12.8 psfConvert D to load on a horizontal plane:Roof slope = 6:12Hypotenuse = (36 + 144)½= 13.42Don horizontal plane= (12.8 psf) (13.42/12) = 14.3 psfb) See Appendix A and Appendix B for weights of framing, insulation, gypsum lath and plaster.Fiberglass loose insulation(10 in.) (0.5 psf/in)=5.0psf2x6 @ 16 in. o.c.=1.4psfGypsum wallboard(½ in.) (5 psf/in)=2.5psfCeiling Dead Load (D)=8.9psfc)roof slope = 6:12 (F= 6) R1= 1.0 since not considering tributary areaR2= 1.2 0.05F = 1.2 (0.05)(6) = 0.9 Basic Roof Live Load: Lr= 20 R1R2= 18 psf______________________________________________________________________
Chapter 2 SolutionsPage 3 of 19Problem 2.3a) See Appendix A and Appendix B for weights of roofing, sheathing, and suspended ceiling.Built-up roof (5 ply w/ gravel)=6.5psf½ in. plywood sheathing(½ in.) (3.0 psf/in)=1.5psfRoof trusses @ 24 in. o.c.(9 lb/ft)÷(2 ft)=4.5psfSuspended acoustic ceiling: Acoustical fiber tile=1.0psfSuspended acoustic ceiling: Channel-suspended system=1.0psfRoof Dead Load (D)= 14.5 psfb) See Appendix A and Appendix B for weights of framing, sheathing, and suspended ceiling.Concrete(150 lb/ft3) (0.125 ft)= 18.8psf2x10 @ 16 in. o.c.=2.4psf5/8 in. plywood sheathing(5/8 in.) (3.0 psf/in)=1.9psfAir duct=0.5psfSuspended acoustic ceiling: Acoustical fiber tile=1.0psfSuspended acoustic ceiling: Channel-suspended system=1.0psf2ndFloor Dead Load (D)= 25.6 psfc)roof slope = 0.25:12 R1= 1.0 since not considering tributary areaR2= 1.0 for roof slope less than 4 in 12 Basic Roof Live Load: Lr= 20 R1R2= 20 psf______________________________________________________________________
Chapter 2 SolutionsPage 4 of 19Problem 2.4a) See Appendix A and Appendix B for weights of roofing, sheathing, and subpurlins.

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