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2008-04-21_REVISION - M1977300 (2)
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2008-04-21_REVISION - M1977300 (2)
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Last modified
8/24/2016 3:28:21 PM
Creation date
5/16/2008 9:42:27 AM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
M1977300
IBM Index Class Name
REVISION
Doc Date
4/21/2008
Doc Name
Steve Level Adit Bulkheads/ As-Built Documentation Package
From
Cotter Corp.
To
DRMS
Type & Sequence
TR10
Email Name
DB2
Media Type
D
Archive
No
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Pierce Adit Bulkhead. As-Built <br />Project, Sta.2+84 By MEL/JFA Date 3/28/08 <br />12' Thick, 11'-7" Wide, 11'-8" High, Sheet 4 of 8 <br />#6 Rebar <br />Reinforced concrete deep-beam bending stress design for static fluid load on upstream face <br />C = ~r~f~b,,,a = 0.85(3000)12a = 30600a <br />C = T 30600a = 60000AS <br />Factored static fluid bending moment, <br />T = Asfy = 60000AS <br />a = (60000 AS)/30600 = 1.961 AS <br />Mn <br />~N~,y~,:= - Mu = 195582 ft-lb <br />~rc <br />Muin ~= 12•Mu Muin = 2346981 in-lb <br />Maximum concrete rebar cover, d := 12•L.t - me d = 140.500 in <br />M„ = Asf~(d-a/2) = 60000AS(116.5 - 1.961 AS/2) = 60000 ASd - 58830 Asz <br />• <br />58830 AS2 - 60000 Asd + Mu;n = 0 C1 := 58830 C2 :_ -60000•d C3 := Muin <br />-C2- C22-4'Ci•C3 <br />AS := AS = 0.279 in2 <br />2•C1 <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, ~:= 0.44 in2 <br />Check for adequacy, <br />Allowable factored bending moment, Au :_ -C1•1As2/ - C2•AS Au = 3697811 in-lb <br />Design factored bending moment, Mu;n = 2346981 in-lb <br />Au <br />Factor of safety, FS := FS = 1.576 <br />Muin <br />
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