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ECCENTRICITYAND BEARING <br /> Eccentricity is the calculation of the distance of the resultant away from the centroid of mass. in wall design <br /> the eccentricity is used to calculate an effective footing width. <br /> Calculation of Eccentricity <br /> SumV= +W1 <br /> + 454 SumV= 454 <br /> Moment Resisting Mr=-63 <br /> Moment Driving Md = 152 <br /> e = (SumMr+ SumMd)/(SumV) <br /> e = (89/453.75) e=0.197ft <br /> Calculation of Bearing Pressures <br /> Quit= c* Nc+ q * Nq + 0.5 *y*(B') * Ng <br /> where: <br /> Nc=75.31 <br /> Nq =64.20 <br /> Ng =109.41 <br /> c=10.00psf <br /> q = 118.80psf(soil weight above base of leveling pad) <br /> B' = B -2e + Ivlpad = 1.10ft <br /> Gamma=120pcf <br /> Calculate Ultimate Bearing, Quit Quit=15577psf <br /> Bearing Pressure = (SumVert/ B') + (LP width *gamma) sigma=463.31psf <br /> Calculated Factors of Safety for Bearing Qultisigma=33.62 <br /> Note: Calculations and quantities are for PRELIMINARY ANALYTICAL USE ONLY and MUST NOT be used for final <br /> n or construction without the independent review, verification, and approval by a qualified professional engineer. <br /> Cornerstone Analysis and Design 5.1.21009.30 9 <br />