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Check attachment of Support to Existing Structure for Wind Uplift - Cont'd <br />Tributary Area to Each Solar Mount = 6 ft. x 3.2 ft. = 19.2 sq. ft. ( Max ) <br />Calculate Design Wind Pressure at each support (Wind Speed 130 mph Exposure C): <br />p = q h (GC p )(γ E )(γ a )Eq'n 29.4-7 ASCE 7-22 <br />q h = 0.00256 K z K zt K d K e V 2 Eq'n 26.10-1 ASCE 7-22 <br />Note: <br />K z =velocity pressure coefficient Section 29.10.1 ASCE 7-22 <br />K z =0.9 (Exposure C, Height = 20 ft or less) <br />K zt =Topographical Factor = 1.0 <br />K d =Wind Directionality Factor = 0.85 <br />K e =Ground Elevation Factor = 1.0 <br />V =130 mph ;VASB =101 mph <br />q h =0.00256 (0.9) (1.0) (0.85) (1.0) (101)² <br />q h =19.98 psf <br />GC p =-2.0 (Zone 2 ; Effective Area = 15 sq. ft. ) <br />γ E =Exposure Factor = 1.5 <br />γ a =Solar Array Pressure Equalization Factor = 0.7 Fig. 29.4-8 ASCE 7-22 <br />p = q h (GC p )(γ E )(γ a ) <br />p = 19.98 psf (-2.0) (1.5) (0.7) = 42 psf <br />Sht # 4 of 7 <br />2023-4093 Axis Solar Scott Bourdelais July 13, 2023 <br /> Loyd W. Martin Professional Engineer, Inc. <br />9924 Universal Boulevard #224-406 Orlando, FL 32819 Tel:1.310.464.1804 <br /> Email: loydwmartin@gmail.com www.loydwmartin.com <br />2060 N Tustin Ave - 101116106 & <br />20180500 <br />10/4/2023