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AOstructures Inc. <br />PO Box 413 <br />Carnelian Bay, CA 96140 <br />916.541.8586 <br />www.AOstructures.com <br />Per ASCE 7-16 Ꚃ 29.4.3 <br />Wind Speed 95 mph <br />Exposure Category B <br />Roof Shape Monoslope <br />Roof Slope 0 deg <br />Mean Roof Height 25 ft <br />Lp =7.40 ft >6.7, However, no better code reference, OK! <br />ω =10.0 deg < 35 degrees, OK <br />h1 =10 in < 24", OK <br />h2 =25 in < 48", OK <br />hpt =3.50 ft (mean parapet height) <br />An = 29.6 sft <br />Wind Pressure P = qh Kd (GCrn)(Eq. 29.4-5) <br />qh = 0.00256 * Kz * Kzt * Ke * V^2 (Eq. 26.10-1) <br />Kz (Exposure Coefficient) = 0.7 (Table 26.10-1) <br />Kzt (topographic factor) = 1 (26.8.2) <br />Ke (Ground Elevation Factor) = 1 (Table 26.9-1) <br />V (Design Wind Speed) = 95 mph (Fig. 26.5-1) <br />Kd (Wind Directionality Factor) = 0.85 (Table 26.6-1) <br />qh * Kd = 13.75 Ultimate Design Level <br />GCrn = (ɣp) (ɣc) (ɣE) (GCrn)nom (29.4-6) <br />(ɣp) = min(1.2, 0.9+hpt/h) 1.04 <br />(ɣc) = max(0.6 + 0.06Lp, 0.8) 1.04 <br />(ɣE) Array Edge Factor = 1.50 (for uplift loads) <br />1.00 (for downward loads) <br />qh * Kd * (ɣp) (ɣc) (ɣE) = 22.39 Uplift - Ultimate Design Level <br />0.6 * qh * Kd * (ɣp) (ɣc) (ɣE) = 13.43 Uplift - ASD Design Level <br />qh * Kd * (ɣp) (ɣc) (ɣE) = 14.93 Downward - Ultimate Design Level <br />0.6 * qh * Kd * (ɣp) (ɣc) (ɣE) = 8.96 Downward - ASD Design Level <br />Wind Calculations - Tilt-up solar specific racking system <br />Wind Speed Input Variables <br />Design Wind Pressure Calculations <br />Array Configuration Inputs <br />1661 - Westridge Labs, Santa Ana, CA.xlsx 3