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Wind Load Calculation for Antenna Supporting Structures <br /> (Reference:TIA-222-G,Section 2.6) <br /> Wind Velocity Pressure: <br /> Height,z(ft) = 100 (Ht above ground level at base of mount structure) <br /> Crest Height,H(ft) = 105 (Height of crest above surrounding terrain) <br /> Basic Wind Speed,Vas(mph) = 85 (ASCE 7-16 Online Hazards Tool) <br /> Exposure Category = C (Section 2.6.5) <br /> Topographic Category = 1 (Section 2.6.6.2) <br /> Risk Category = IV (Table 2-1) <br /> Importance Factor,I = 1.15 (Table 2-3) <br /> Velocity Pressure Exposure Coeff,K, = 1.27 (Section 2.6.5.2) <br /> Topographic Factor,K. = 1.00 (Section 2.6.6.4) <br /> Terrain Constant,Ke = 1.00 (Table 2-4) <br /> Wind Directionality Factor,Kd = 0.85 (Table 2-2) <br /> Nom ht of atmospheric boundary layer,zg(ft) = 900 (Table 2-4) <br /> Wind speed power law exponent,a' = 9.5 (Table 2-4) <br /> Min value for Kz,K„„i„ = 0.85 (Table 2-4) <br /> Topographic Constant,Kt = #N/A (Table 2-5) <br /> Height attenuation factor,f = #N/A (Table 2-5) <br /> Height reduction factor,Kh = UN/A (Section 2.6.6.4) <br /> Gust Effect Factor,Gh = 0.85 (Section 2.6.7) <br /> Velocity Pressure,qz(psf) = 0.00256K,K,1K,V21 (Section 2.6.9.6) <br /> q,= 22.88 psf(ASD) <br /> Design Wind Loads <br /> Wind Force on Mounting Frame(LRFD): FA= 31.1 psf x 1.64 x(EPA),,'x Ka` <br /> (Section 2.6.9.2.2) FA= 54.5 psf <br /> 1.Equivalent Ca factor for standard sector mounting frames=1.75 <br /> 2.Ka=1.0 for mounting frames <br /> 3.Pressure is applied as area load over all frame members,including mounting pipes <br /> 4.Wind pressures factored by 1.6 for LRFD load combination <br /> Wind Force on Appurtenances: FA= 31.1 psf x(EPA)A' <br /> (Section 2.6.9.2) <br /> 1.(EPA)Ais calculated for each individual appurtenanes. Refer to Wind Load Calculation for Antenna Supporting <br /> Structures summary. <br /> Descnpuon <br /> By Date <br /> CCC 2/7/2023 <br /> o Checked Date <br /> Wind Load for Antenna Supporting Structures <br /> ENGINEERING <br /> p=leot Scale SheetNo. <br /> Port Gardner N.T.S. <br /> Suite 200 lob No. <br /> Edmonds,WA 98020 23007.126 <br />