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Foundation Design: Distribution Switchboard <br />Design Data: <br />L <br />d <br />PX <br />PY <br />B <br />L <br />b <br />l <br />Cabinet Size (ft) <br />Equipment Load P1 (lbs)Width (b)Depth (l)Height - h <br />Distribution Switchboard 1,850 3.75 11.33 5.25 <br />Footing Width - ft <br />(B) <br />Length - ft <br />(L) <br />Thickness - ft <br />(T) <br />Area - sf <br />(A) <br />Foundation Size 4.75 12.33 1.0 58.6 <br />Sxx = 46.4 Section Modulus- Short direction <br />Syy = 120.4 Section Modulus- Long direction <br />f’c = 4000 psi Conc. Strength <br />fy = 60000 psi Steel Strength <br />ρ = 150 pcf Density of conc. w/ reinforcing steel <br />Qa = 1500 psf Allowable Soil Bearing Pressure (2022 CBC Sect. 1806) <br />SDS = 1.03 Seismic Design Spectral Accel. <br />Ie = 1.0 Importance Factor <br />μ = 0.25 Coefficient of Friction <br />Loads: <br />PF = 8,785 lbs Weight of Foundation <br />P = 10,635 lbs Total Foundation Dead Load <br />PL = 200 lbs Live Load <br />Wind Force: <br />Lateral Force Due to Wind FWIND = qz * G * Cf * As <br />(Tbl 29.4-1)(Tbl 26.8-1)(Tbl 26.6-1)(Tbl 26.9-1)(Wind Vel.) <br />Kz = 0.85 KZT = 1 Kd = 0.85 Ke = 1 Vw = 89 <br />qz = 0.00256 * Kz * K ZT * Kd * Ke * Vw <br />2 = 14.7  psf <br />Cf = 0.9    (ASCE 7-16 Fig. 29.4-1)G = 0.85 (ASCE 7-16 Sect. 26.11) <br />Project:Bristol EVCS By:MP Sheet No. <br />Location:2740 S Bristol St Date:05-18-2025 <br />Santa Ana, CA Chk'd:Job No. <br />Subject:EV Chargers Structural Calcs <br />Gasteiger Engineering, LLC <br />8549 Wilshire Blvd., Suite2029  <br />Beverly Hills, CA 90211 Date: <br />5