Laserfiche WebLink
Design Wind Pressure(cont'd) hrf <br /> — =0.29 <br /> Roof(fig. 27.4-1) L <br /> o.8s <br /> GC Internal pressure coefficient(ref.table 26.11-1) <br /> p' 0.85 <br /> External pressure coefficients for roofs(ref.figure 27.4-1) <br /> hrf (-0.3" Windward&leeward coefficients <br /> —L =0.29 Cprf <br /> Veolcity pressure evaluated at mean roof height,h <br /> qh := qz =32.2•psf <br /> Design MWFRS wind pressure(ref.eq 27.4-1) <br /> 11 1 ( 19.2 ` <br /> prfl := gh•(Ge•min(Cprf) - GCpi) = .psf prf2 := gh•(Ge•max(Cprf) - GCpi) = •psf <br /> prf := max(Imin(prfl)I ' Imax(prf2) ) =43.83•psf Prf horiz:= prf•sin(0) = 13.9•psf <br /> pw_up:= 0.6DLrf + 0.6•(min(prf1,prf2)) Net uplift pressure(ASD) per,-up =-17.3•psf <br /> Roof Overhangs <br /> -0.8 External pressure coefficients for roof overhangs(ref.27.4.4) <br /> Cpoh <br /> Poh := gz.(Ce•Cpoh) + min(prfl'Prf2) Overhang pressure poh =-65.7•psf <br /> OHnet:= 0.6DLrf + 0.6•poh Net uplift pressure(ASD) OHnet=-30•psf <br /> 02_Lateral Analysis.xmcd 6 3) <br /> S5 <br />