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PROJECT NAME: HULTS RESIDENCE ADDITION <br /> JOB: X10-2854 <br /> Diaphragm 17.8 0.70 25.43 0.62 22.53 <br /> 20.0 0.70 25.43 0.62 22.53 <br /> Max Height 22.1 0.70 25.43 0.66 23.98 <br /> Gust effect factor G=0.85,assume Rigid Structure(ASCE 7-10 Section 26.9.1) <br /> Internal pressure coefficient(G Cp,)=±0.18(ASCE 7-10 Table 26.11-1) <br /> External wall.Cp from Figure 27.4-1 <br /> Windward wall,Cp=0.80 for all L/B ratios <br /> Side wall.Cp=-0.70 for all.L/B ratios <br /> Leeward wall pressure coefficient, Cp if a function of the LIB ratio <br /> For load direction 1,B=40.0 ft.and L=26.0 ft. <br /> L/B=26.0/40.0=0.65,Cp=-0.50 <br /> For load direction 2,B=26.0 ft.and L=40.0 ft. <br /> LIB'=40.0/26.0= 1.54,Cp=-0.39 <br /> Surface Wind direction L LB Cg <br /> Windward wall All All 0.80 <br /> Leeward wall Direction 1 0.65 -0.50 <br /> Leeward wall Direction 2 1.54 -0.39 <br /> Side wall All All -0.70 <br /> External roof Cp-Load direction 1,from Figure 27.4-1 <br /> Surface Angle=18.4 <br /> Windward roof -0.65 <br /> -0.12 <br /> Leeward roof -0.59 <br /> The above table reflects Cp values based on h IL of 19.9/26.0=0.77 <br /> Internal pressure coefficient(G Cpi)-Load direction 1 <br /> G Cp,=±0.18 acting at 19.9 ft. <br /> Velocity pressure at q,=qh=22.53 psf(Load case 2-Occurs at roof mid height) <br /> MWFRS Net pressures-Load direction 1 <br /> P -ghG Cp-q,(GCO) <br /> p =qh(0.85)Cp-22.5(±0.18),psf <br /> CUSTOM DESIGN & ENGINEERING, INC. <br /> March 3, 2022 Page 4 / 67 <br /> Copyright 0 2022 Custom Design&Engineering,Inc.All rights reserved. <br />