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Light Fixture <br />W =5.5 ft D =0.9 ft <br />H =0.4 ft <br />Eff. Wind Area =2.3 ft2 <br />p =qzGCf (lb/ft2)(ASCE 7-10, 29.5-1 / ASCE 7-16 & 22, 29.4-1) <br />where, G =0.85 <br />where, Cf =force coefficient (ASCE 7-10, Fig. 29.5-1 / ASCE 7-16 & 22, Fig. 29.4-1) <br />=1.72 <br />qz = 0.00256 Kz Kzt Kd V2 (lb/ft2) <br />Kz = 2.01 (z/zg)2/ <br />where z =18.00 ft <br />zg =900 ft <br /> =9.5 <br />Kz =0.88 <br />Kzt = (1+K1K2K3)2 <br />=1.0 <br />Kd =0.9 <br />Threfore, qz =18.3 psf <br />Threfore, p =26.9 psf <br />Wind Force W =62 lbs at 15 ft <br />11