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1 | P a g e <br /> <br />ASCE 7 - 16 WIND CALCULATION FOR: Roof 1 <br />Project Address: 1429 S GARNSEY ST, SANTA ANA, CA 92707, USA <br /> <br />DESIGN CRITERIA <br />Ultimate Wind Speed: 95 mph <br />Exposure Category: B <br />a: 3 ft <br />Velocity Pressure Exposure Coefficient, Kz: 0.57 <br />Topographic Factor, Kzt: 1 <br />Wind Directionality Factor, Kd: 0.85 <br />Ground Elevation Factor, Ke: 1 <br />Solar Array Pressure Equalization Factor, Ξ³a: 0.72 / 0.7 <br />Array Edge Factor, Ξ³E: 1.5 <br />Solar Array Dead Load: 3.4 psf <br />Mean Roof Height: 12 ft <br />Roof Pitch: 5° <br />Roof Type: Flat / Low-Sloped <br />Module Name, Dimensions, Area: JA SOLAR: JAM54S31 <br />405/MR 405W, 44.6in X 67.8in, 3023.88 sqin <br />CALCULATION <br /> <br />Velocity Pressure Due to Wind: π‘žπ‘žβ„Ž = 0.00256(𝐾𝐾𝐾𝐾)(𝐾𝐾𝐾𝐾𝐾𝐾)(𝐾𝐾𝐾𝐾)(𝐼𝐼)(𝑉𝑉2) (πΆπΆβ„Ž 26.πΈπΈπ‘žπ‘ž 26.10 βˆ’1) <br />Actual Uplift Pressure: p = 0.6𝐷𝐷+0.6π‘Šπ‘Š (πΆπΆβ„Ž 2.4.1 𝐿𝐿𝐢𝐢 #7/π‘Žπ‘Ž) <br />Wind Uplift Pressure: 𝑝𝑝= π‘žπ‘žβ„Ž (𝐺𝐺𝐢𝐢𝑝𝑝)(𝑦𝑦𝐸𝐸 )(π‘¦π‘¦π‘Žπ‘Ž ) (πΆπΆβ„Ž 29.πΈπΈπ‘žπ‘ž 29.4 βˆ’7) <br />Landscape Panels <br />Roof Zone 1 1' 2 3 <br />Mount Spacing 48” 48” 48” 48” <br />External Pressure Coefficient (GCp) -1.7 -0.9 -2.3 -3.2 <br />Actual Uplift Pressure (p) -16 psf -16 psf -14.79 psf -21.37 psf <br />Tributary Area (AT) 7.43 sqft 7.43 sqft 7.43 sqft 7.43 sqft <br />Uplift Force (P) -118.93 lbs -118.93 lbs -109.93 lbs -158.86 lbs <br /> <br />Portrait Panels <br />Roof Zone 1 1' 2 3 <br />Mount Spacing 48” 48” 48” 48” <br />External Pressure Coefficient (GCp) -1.68 -0.9 -2.27 -3.14 <br />Actual Uplift Pressure (p) -16 psf -16 psf -14.19 psf -20.42 psf <br />Tributary Area (AT) 11.3 sqft 11.3 sqft 11.3 sqft 11.3 sqft <br />Uplift Force (P) -180.8 lbs -180.8 lbs -160.37 lbs -230.72 lbs <br /> <br />Uplift Capacity <br />Attachment Type = 4 60mm Lag Screw Lagged into Rafters <br />Hardware Pullout Capacity = 447 lbs <br />Embedment Depth = 2.5 in <br />Safety Factor = 1.5 <br />Duration Factor = 1.6 <br />Maximum Uplift Force = 158.862 lbs / 230.722 lbs <br />Allowable Pullout Capacity = 447 lbs <br />Allowable Pullout Capacity = 447 lbs > Uplift Force per Bolt = 158.86 lbs, Therefore OK. (Landscape) <br />Allowable Pullout Capacity = 447 lbs > Uplift Force per Bolt = 230.72 lbs, Therefore OK. (Portrait)