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11/13/2007 13:56 FAX <br />Z 005/018 <br />Project, Pierce Adit Bullche:ad, Sta. 3+04 By MT:L/JFA Date 10/30/07 <br />12' Thick, 12' Wide, 12' High, #6 Rebar <br />Shr:-et 4 of 8 <br />Reinforced concrete deep-beam beading stress design for static fluid load on upstream face <br />C = ? ,.fcba = 0.85(3000)12a = 30600a T = Ayfy = 60000AS <br />C=T 30600a = 60000A; a = (60000 A?,)/30600 = 1.961 AS <br />Factored static fluid bending moment, Mn Mu = 209664 ft-lb <br />rc <br />Muin 12-Mu Muin = 2515968 in-lb <br />Maximum concrete rebar cover, d := 12. Lt - m. d = 140.500 in <br />M„ = ASf jd-a/2) = 60000As(116.5 - 1.961 A,/2) = 60000 A,d - 58830 A`2 <br />58830 AS' - 60000 Asd + Mein = 0 C1 := 58830 C2 := ... 60000- d C3 := Muin <br />-C2 - JC22 - 4-C r C3 <br />a •- <br /> <br />s 2 C AS = 0.299 in2 <br />I <br />One cage of #6 bars (0.44 in2 per bar, 0.750-in nominal diameter, 1.502 lb/ft) on 12.00-in c-c <br />(11.250-in between bars) provides 0.44 in2/ft of Steel area. <br />Therefore, A$:= 0.44 in'- <br />Check for adequacy, <br />Allowable factored bending moment, Au := -C1 -(As 2) - C2As A, = 3697811 in-lb <br />Design factored bending moment, Muin = 2515968 in-lb <br />Factor of safety, FS := A" <br />FS = 1.470 <br />Muin