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Gold Prince Portal Bulkhead Calcs Page 5 August 19, 1996 <br /> Thickness of plain concrete bulkhead required to support earthquake produced bending <br /> moment (Mua)of 17,400 ft•lb: <br /> fc1 = 3 f� = 3 3000 = 164psi <br /> / Muac _ M„a 17400 _ 725 <br /> f c1 = 164 =a= I $ _ 144L2 —L2 <br /> 6 <br /> L 12 5 — 4.4 =2.10 ft Therefore, 2.5 ft long bulkhead needs no <br /> reinforcement to support maximum credible earthquake acceleration. <br /> Q__ Mua _ Mum = 17400 _ 17400 _ 116 Sl <br /> S 144L2 144(2.52) 150 P <br /> 6 <br /> 6 <br /> FS= f61 = 164 = 1.41 <br /> 116 <br /> John F. Abel, Jr. <br /> Colorado P.E. 5642 <br /> 5 <br />