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2 of 2 <br />JOHN A. MARTIN and ASSOCIATES, INC. □ STRUCTURAL ENGINEERS <br />Client: Sheet <br />Project: Job No 16041 <br />Date 6/12/2020 <br />Engineer KK/MF <br />Rogers Electric <br />CBC 2019 <br />CA6-204 <br />SANTA ANA, CALIFORNIA <br />Seismic (ASCE 7-16 Chapter 13) <br />Fp = 0.4apSdsIpWp(1+2z/h)/Rp ASCE Table 13.6-1: Light Fixture <br />Fp min = 0.3SdsIpWp ap = 1 <br />Sds = 1.029 Rp = 1.5 <br />Ip = 1 <br />z/h = 0 <br />Fp = 0.4apSdsIpWp(1+2z/h)/Rp = 0.27 /Wp <br />Fp min = 0.3SdsIpWp = 0.31 /Wp Control <br />centroid (ft) Wp (lbs) Fp (lbs) Mo (ft-lb) <br />Pole 15 183 56 847 <br />(G Type) OSQ-A-NM 30 55 17 509 <br />Sum = 238 73 1357 WIND GOVERNS <br />Foundation (CBC 2019 section 1807.3.2.1 Nonconstrained) <br />d^ = A/2(1+(1+4.36Heq/A)1/2) Bearing Pressure = WT/Ftg area <br />S1 = 1/3*(L)*(d^) WT = 238 lbs <br />2 ft Ftg Area = 3.14 ft2 <br />5.04 ft (TRIAL) Bearing Pressure = 76 psf <br />13.8 ft Bearing Pressure Allow = 1500 psf <br />364 lbs <br />200 lbs/sq/ft/ft <br />S1 = 336 <br />A = 1.27 <br />d^ = 5.04 ft (ACTUAL) <br />d^actual - d^trial = 0.00 OK <br />A = 2.34P/(S1b) <br />b = <br />d^ = <br />Heq = Distance from ground surface to point of application 'P" <br />P = Applied lateral force <br />S1 = <br />(L) = Allowable lateral soil-bearing pressure <br />USE Min Footing Depth = 6.00 ft <br />ftg depth (d^) = <br />ftg diameter (b) = <br />Diameter of round post or footing or diagonal dimension of square post <br />or footing <br />Depth of embedment in earth but not over 12 feet for purpose of <br />computing lateral pressure <br />Allowable lateral soil-bearing pressure based on a depth of one-third <br />the depth of embedment <br />Heq = <br />Pasd (P) = <br />Lateral Bearing# (L) <br /># Lateral Bearing may equal two times the value of Table 1806.2 per section 1806.3.4 CBC 2019 <br /> 950 SOUTH GRAND AVENUE, 4TH FLOOR LOS ANGELES, CA 90015 213.483.6490 <br />G:\Job16000\J16041 Light Pole Foundation\Engineering\Calcs\Santa Ana - CA6-204\1 cover page.xlsm <br />p-2 <br />2020-161485 <br />12/15/20