Laserfiche WebLink
Wind Pressure Calculations <br /> Wind calculations per ASCE 7-16 Chapters 26,28.and 30 <br /> Roof Pitch: 4 /12 Design Wind Speed,V: 110 MPH <br /> Eave Height: 10 ft. Wind Exposure: B Risk Category: II <br /> Velocity pressures qh per equation 26.10-1 <br /> qh=0.00256xKhxKnxKdxKexV2 at mean roof height h <br /> Angle: 18.43 ° <br /> Kh: 0.70 Velocity pressure coefficient at roof ht.h from Table 26.10-1 <br /> 1.00 Topographic effect-assume no ridges or escarpments <br /> Ka: 0.85 Wind Directionality Factor,Table 26.6-1 <br /> Ke: 1.00 Ground Elevation Factor,Table 26.9-1 <br /> Velocity Pressures:qh= 18.43 psf <br /> Determine Velocity Pressure Coefficients&Wind Pressures per ASCE 7-16 Figure 28.3-1 for MWFRS <br /> MWFRS <br /> 1. Windward Eave Wall Pressure 2. Leeward Eave Wall: <br /> GCph,,,,,: 0.52 GCpfwr: -0.42 <br /> qww: 9.52 psf L qiw: -7.66 psf <br /> 3. Windward Eave Roof Pressure 4. Leeward Eave Roof: <br /> GCpfwr: -0.69 GCpfir: -0.47 <br /> qwr: -12.72 psf chi.: -8.64 psf <br /> 5. Windward Gable Wall: 6. Leeward Gable Wall: <br /> GCpfwp: 0.40 Cpfwp: -0.29 <br /> qiw: 7.37 psf r qiw: -5.34 psf <br /> Components&Cladding <br /> GCp,: 0.18 Internal pressure per Table 26.13-1 <br /> 7. Roof elements <br /> GCpr: -0.81 <br /> qer: 18.32 psf Roof elements per Figure 30.3-2A thru <br /> 8. Wall elements: <br /> GCpw: -0.94 <br /> qer: 20.66 psf (Wall elements per Figure 30.3-1 <br /> Page 3 of 13 <br />