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5FA Design Group, LLC <br />STRUCTURAL i GEOTECHNICAL i SPECIAL INSPECTIONS <br />PROJECT NO. (SHEET NO. <br />aulsati I BY <br />Wind Design Criteria CAF <br />;Wind Analysis for Low-rise Building, Based on ASCE 7.16 1 <br />INPUT DATA <br />Exposure category (26.7.3) <br />B <br />Basic wind speed (26.5.1) <br />V = <br />98 mph <br />Topographic factor (26.8 a. Table 26.8-1) <br />Kn = <br />1.00 Flat <br />Building height to eave <br />he = <br />18 ft L <br />Building height to ridge <br />hr = <br />v <br />24 ft = <br />Building length <br />L = <br />56 ft <br />Building width <br />B = <br />24 ft <br />Ground Elevation Above Sea Level <br />E = <br />97 ft <br />Velocity pressure <br />qh = 0.00256 Kh Kzt Kd Ke VA2 = 14.63 psf <br />where: qh = velocity pressure at mean roof height, h. (Eq. 26.10-1 $ Eq. 30.3-1) <br />Kh = velocity pressure exposure coefficient evaluated at height, h, (Tab. 26.10-1) 0.700 <br />Kd = wind directionality factor. (Tab. 26.6-1, for building) = 0.85 <br />KQ = ground elevation factor. (Tab. 26.9-1) = 1.00 <br />h = mean roof height <br />21.00 ft <br />< 60 ft, Satisfactory (ASCE 7-10 26.2.1) <br />Design pressures for MWFRS <br />p = qh [(G C,, )-(G Ca )] prrpr, = 16 psf for wall area (28.3.4) <br />where: p = pressure in appropriate zone. (Eq. 28.3-1). prrdn = 8 psf for roof area (28.3.4) <br />G Cp f = product of gust effect factor and external pressure coefficient, see table below. (Fig. 28.3-1) <br />G Cp i = product of gust effect factor and internal pressure coefficient. (Tab. 26.13-1, Enclosed Building) <br />0.18 or -0.18 <br />a = width of edge strips, Fig 28.3-1, note 9, MAX( MIN(0.1 B, 0.1 L, 0.4h), MIN(0.04B, 0.04L), 3) = 2.40 ft <br />(Net Pressures (psf), Load Case A I <br />Roof an <br />3le 0 = 26.57 <br />G Cpr <br />Net Pressure with <br />Surface <br />(+GCpi) <br />(-GCpi) <br />1 <br />0.55 <br />10.67 <br />5.41 <br />2 <br />-0.10 <br />1.18 <br />-4.08 <br />3 <br />-0.45 <br />-3.91 <br />-9.17 <br />4 <br />-0.39 <br />-3.08 <br />-8.35 <br />1 E <br />0.73 <br />13.28 <br />8.01 <br />2E <br />-0.19 <br />-0.15 <br />-5.42 <br />3E <br />-0.55 <br />-5.42 <br />-10.69 <br />4E <br />-0.53 <br />-5.19 <br />-10.46 <br />Roof angle 0 = 26.57 <br />G CpF <br />Net Pressure with <br />Surface <br />(+GCpj) <br />(-GC,,) <br />1 <br />-0.45 <br />-3.95 <br />-9.22 <br />2 <br />-0.69 <br />-7.46 <br />-12.73 <br />3 <br />-0.37 <br />-2.78 <br />-8.05 <br />4 <br />-0.45 <br />-3.95 <br />-9.22 <br />5 <br />0.40 <br />8.48 <br />3.22 <br />6 <br />-0.29 <br />-1.61 <br />-6.88 <br />1 E <br />-0.48 <br />-4.39 <br />-9.66 <br />2E <br />-1.07 <br />-13.02 <br />-18.29 <br />3E <br />-0.53 <br />-5.12 <br />-10.39 <br />4E <br />-0.48 <br />-4.39 <br />-9.66 <br />5E <br />0.61 <br />11.56 <br />6.29 <br />6E <br />1 -0.43 <br />-3.66 <br />-8.92 <br />Load Case A (Transverse) Load Cose 8 (Longitudinal) <br />