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PV Module Weight =2.50 psf <br />Hardware Assembly Weight =0.50 psf <br />PV-DL =3.00 psf <br />Existing Roofing Material Weight 1 Layer(s)=1.50 psf <br />Underlayment Weight =0.50 psf <br />Plywood/OSB Sheathing Weight =1.50 psf <br />Framing Weight =2.27 psf <br />Vaulted Ceiling Weight =3.00 psf <br />Miscellaneous =1.50 psf <br />Total Roof Dead Load R-DL =10.30 psf <br />Roof Live Load Lo =20.00 psf <br />Member Tributary Area At < 200 ft2 <br />ROOF AR-01 Pitch 7° or 2/12 <br />Tributary Area Reduction Factor R1 =1.00 <br />Roof Slope Reduction Factor R2 =1.00 <br />Reduced Roof Live Load, Lr = Lo (R1) (R2)Lr =20.00 psf <br />Ground Snow Load pg =0.00 psf <br />Effective Roof Slope 7° <br />Snow Importance Factor Is =1.00 <br />Snow Exposure Factor Ce =1.00 <br />Snow Thermal Factor Ct =1.10 <br />Minimum Flat Roof Snow Load pf-min =0.00 psf <br />Flat Roof Snow Load pf =0.00 psf <br />Roof Slope Factor Cs-roof =1.00 <br />Sloped Roof Snow Load on Roof ps-roof =0.00 psf <br />Roof Slope Factor Cs-pv =1.00 <br />Sloped Roof Snow Load on PV Panel ps-pv =0.00 psf <br />Total PV System Dead Load <br />2 x 8 @ 16 in. O.C. <br />Rolled Composite Roof <br />ROOF AR-01 <br />LOAD CALCULATION <br />MONICA WILLIAMS RESIDENCE, 1730 W RICHLAND AVE, SANTA ANA, CA, 92703 <br />PV SYSTEM DEAD LOAD (PV-DL) <br />ROOF DEAD LOAD (R-DL) <br />SLOPED ROOF SNOW LOAD ON PV PANEL (Unobstructed Slippery Surfaces) <br />REDUCED ROOF LIVE LOAD (Lr) <br />SNOW LOAD <br />SLOPED ROOF SNOW LOAD ON ROOF (Non-Slippery Surfaces) <br />Mighty Engineering Co | 1704 Roxborough Rd Charlotte, NC 28211 | (980) 689.9776 | info@mightyengineeringco.com pg 3 of 5 <br />1730 W Richland <br />Ave3/19/2025