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PV ASSEMBLY WEIGHT <br />PV System Weight PV Areas <br />PV Module Weight (psf)2.5 psf <br />Hardware Assembly Weight (psf) ,'0.5. psf' <br />PV System Weight (psf)3.0 psf <br />CALCULATION OF ROOF DEAD AND LIVE LOADING <br />Roof Dead Load Material Load <br />Roof Category Description MP1 <br />Roofing Ty,pe Comp Roof (1 L-ayers )2.5 w <br />Re-Roof to 1 Layer of Comp? No <br />Underlayment . Roofing Paper 0.5 osf <br />Plywood Sheathing Yes 1.5 psf <br />Board Sheathing 2.3 psfSolid-Sheathing <br />Rafter Size and Spacing 3.50" x 5.50" @ 32 in. O.C.2.0 psf <br />Vaulted Ceiling Yes 4.7 osf <br />Miscellaneous Miscellaneous Items 1.5 psf <br />Total Roof Dead Load 15 0sf (MPO 15.0 psf <br />Reduced Roof Live Load Non-PV Areasi Value ASCE 7-10 <br />Roof Live Load 4 20.0 W Table 4-1 <br />Member Tributary Area At 3 200 sf <br />Roof Slope 8/12 <br />Iributary Area Reduction Ri 1 Section 4.8 <br />Sloped Roof Reduction R 0.8 Section 4.8 <br />Reduced Roof Live Load Lr 4 = Lo (Ri) (RD Equation 4.8-1 <br />Reduced Roof Live Load Lr 16 Fsf (MPU 16.0 psf <br />4i