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1111 pool POOL ENGINEERING INC. ' By: R. McPherson, <br />' d-11_111 engineering II Location: Santa Ana, CA,92701-5127 Date: 3/20/2014-- inc. / <br />- Job# 14-0457 <br />WIND UPLIFT ANCHOR DESIGN: <br />Simplified Procedure for Components and Cladding: (Sec. 30.5. ASCE 7-10) <br />V = 110 mph (basic wind speed) <br />Exp. Cat.= C exposure category (Section 26.7, ASCE 7-10) <br />A= 1.21 Adjustment Factor for Building Height (Figure 30.5-1, ASCE 7-10) <br />Kzt = 1 Topographic Factor (Section 26.8.2, ASCE 7-10) <br />Zone = 2 Roof 8 =22.7 deg Area =230 sq.ft. <br />Pret30 =31.9 p.s.f Net Wind Design Pressure, Eqn. 6-2, ASCE 7-10 <br />Pnet = Al<.P net30 =(1.21)(1)(31.9 p.s.f.) = 38.599 p.s.f. <br />(Pnetdesign -38.6 p.s.f. Design Wind Uplift Pressure on Components and Cladding (16 p.s.f. min. per Sec. 30.2.2, ASCE 7-10) <br />Connection to Existing Roof Framing: <br />FS= 1 (additional factor of saftey applied to withdrawal force) <br />Atrib =17.1 sq.ft.(panel area tributary to each lag screw) <br />D= 2.9 p.s.f.(panel dead load) <br />W=38.6 p.s.f.(design wind pressure) <br />Plag = FS*Atrib*(0·60-0.6W) = (1)(17.1 sq.ft.)[(0.6)(2.9 p.s.f.)-(0.6)(38.6p.s.f.)] <br />= 366.2lb. (withdrawal force applied to each lag screw) <br />DI Alag=5/16 in.(lag screw diameter) <br />Dpen = 2.50 in.(lig screw penetratioh into existing framing member) <br />W=266 lb./in.(lag screw reference withdrawal design value - NDS Table 11.2A, G=0.50) <br />CD =1.6 (load duration factor, 2012 NDS) <br />Ct =0.7 <br />W' = CD*C*W =(1.6)(0.7)(266 lb./in.) = 297.92 lb./in.(adjusted withdrawal value) <br />Pallow = Dpin* W' =(2.5 in.)(297.92 lb./in) = 744.8 lb. <br />Results:DEMAND = 366.2 lbs. < CAPACITY = 744.8 lbs. ==> OK <br />3/20/2014 2:47 PM <br />\\peanasv2\Pool\Projects Solar\2014\0457-14 Residential\14-0457 SOLAR PANEL CALCS.xlsx <br />Page 12 of 13 <br />©Pool Engineering, Inc. 2014 <br />.