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w 4. • <br /> Dead Load Determination: <br /> Roof: <br /> _ Item Value Unit Source <br /> Gypsum Board 2.75 <br /> psf ASCE 7-10, page 399,Table C3-1 <br /> (5/8-in thick) <br /> Composition 2 psf ASCE 7-10, page 332,Table C3-1(Doubled) <br /> Roofing <br /> Plywood (1/2-in 2.4 psf ASCE 7-10,page 399,Table C3-1 <br /> thick) <br /> Loose Insulation, 6 0 psf Design of Wood Structures 6th Edition,Appendix B, <br /> 12-in,thick p Insulation, Loose <br /> 2x12 Roof Rafters 2 9 psf Design of Wood Structures,6th Edition,Appendix A <br /> spaced at 16"o.c. <br /> Total 16.05 psf <br /> Total Rounded Up 17 psf <br /> Second through Fifth Floors: <br /> Item Value Unit Source <br /> Plywood (3/4-in 2.4 psf ASCE 7-10, page 332,Table C3-1 <br /> thick) <br /> Hardwood Flooring 4 psf ASCE 7-10, page 333,Table C3-1 <br /> Weight of 2x8 <br /> Nailed Laminated 2.44 psf G =0.50,assumed 2x8 joist to have actual dimensions <br /> Floor of 1.5"x7.5" <br /> Total 8.84 psf <br /> Total Rounded Up 12 psf <br />