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Project: <br />Location: <br />WIND LOADS (ROOF 1) <br />Wind loads on standoffs and their attachment to the underlying structure are determined as per the requirements for <br />rooftop solar panels parallel to the roof surface (ASCE 7-16, Section 29.4.4). <br />Risk Category =II <br />Basic Wind Speed, V (ULT) =110 mph <br />Wind Directionality Factor, K d = 0.85 Table 26.6-1 <br />Exposure Category =C <br />Topographic Factor, Kz t = 1.0 Table 26.8-1 <br />Ground Elevation Factor, K e = 1.0 Table 26.9-1 <br />Mean Roof Height, h =25 ft (Max) <br />Velocity Pressure Exposure Coefficient, K z = 0.95 Table 26.10-1 <br />Velocity Pressure, qh = 0.00256KzKztKdKeV 2 = 24.91 psf (ULT)Eq. 26.10-1 <br />qₕ_ASD = 0.6 x qₕ_ULT =14.94 psf <br />Roof Type =Gabled <br />Roof Slope =22 Degrees <br />Array Edge Factor, ɣ E = 1.0 29.4.4 <br />Effective Wind Area, A eff = See Table Below 26.2 <br />Design Wind Pressures (ASD), pUPLIFT (ASD) = qh (ASD) . (GCp). gE . ga ; pASD_MIN = 10 psf Eq. 29.4-7 <br />Standoff Net Uplift Forces, PUplift (ASD) (lbs) = pWIND ASD x Atrib - 0.6PDL (See Table Below) <br />DOWNWARD <br />ALL <br />ZONE 1 <br />(Interior) <br />ZONE 2 <br />(Edge) <br />ZONE 3 <br />(Corner) <br />ZONE 1 <br />(Interior) <br />ZONE 2 <br />(Edge) <br />ZONE 3 <br />(Corner)ALL ZONES <br />Pressure Equalization Factor, ɣ A 0.76 0.76 0.80 0.80 0.80 0.80 0.80 <br />-1.50 -2.40 -3.09 -1.50 -2.50 -3.51 0.58 <br />-17.1 -27.4 -36.9 -17.9 -29.9 -42.0 10.0 <br />48.00 48.00 32.00 48.00 48.00 32.00 48.00 <br />3.07 3.07 3.07 1.69 1.69 1.69 3.07 <br />12.28 12.28 8.19 6.77 6.77 4.51 12.28 <br />-188 -315 -288 -109 -190 -181 145 <br />ROOF ATTACHMENT CHECKS <br />Max Standoff Uplift (ASD) = =315 lbs <br />Mount Allowable Uplift = =450 lbs (Per Manuf.) <br />Standoff Demand/Capacity Ratio, DCR = =70% < 100%, Therefore O.K. <br />Fastener Size and Type = =5/16” <br />No. of Fasteners per Standoff, N = =1 <br />Min Fastener Embed Into Framing, T = =2.5 in <br />Fastener Allowable Pullout, W = =246 lb/in <br />Wind Load Duration Factor, LDF =1.6 <br />Additional Factor of Safety, F.S = =1.5 <br />=656 lbs <br />Fastener Demand/Capacity Ratio, DCR = =48% < 100%, Therefore O.K. <br />Lag Screw(s) <br />LANDSCAPE <br />UPLIFT <br />Standoff Net Uplift Forces, <br />PUplift (ASD) (lbs) <br />Trib. Area, ATrib (ft2) <br />PORTRAIT <br />ZONE <br />GC p <br />Design Wind Pressures (ASD), <br />pUPLIFT (ASD) (psf) <br />Standoff X-Spacing (in) <br />Trib. Width (ft) <br />PRESSURES <br />Fastener Group Allowable Pullout Capacity <br />Tran Residence <br />SANTA ANA, CA <br />30011 Ivy Glenn Dr, Ste 219, Laguna Niguel, CA 92677 <br />info@lagunaengineers.com <br />Panel Configuration <br />Page 4 <br />2043 N Ross St <br />07/28/23