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DESIGN MANUAL& KEYWALL OPERATING GUIDECRANKINE METHODOLOGY LEVEL SURCHARGE - 250 PSF9) Bearing Pressure (Note: Live load is added for “e” and Max Bearing Pressure)EccentricityEquation (3i)e = B/2 - (M r -M o )/R vM r = M r + W q x (W u + L/2)= 43613 + (1688 x (1.75' + 6.75'/2)) = 52001 ft-lbsR v = W f + W 1 + W q= (2100 + 8100 + 1688) = 11888 lbs/fte = 8.5'/2 - (52001-10825)/(11888)= 0.79'Applied Bearing PressureEquation (3j)σ v = R v /(L-2e)= (11888)/(8.5'-2x0.79')= 1718 lbs/sf10) Bearing CapacityNote:The external analysisabove is limited tosimple overturning,sliding, appliedbearing pressure andbearing capacity forthe reinforced massbased on a level toe. Noattempt has been madeto evaluate the morecomplicated geotechnicalconcerns of settlementand global stability.Geotechnical site andsoils evaluation is a sitespecific art and can notbe programmed.Equation (3k)Q ult = cN c +γDN q +0.5γ(B-2)Nγwhere:N c = 30.14, N q = 18.4, Nγ =22.40B = (B-2e) = (8.5'-2 x 0.79) = 6.92'D = 1.0' level embedmentc = 0Q ult = 0+(120)(1)(18.4)+(0.5)(120)(6.92)(22.40)= 11508 psfFS br = 11508/1716 = 6.71 > 2.0 OKC.5