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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 /> + 514 SumV= 514 <br /> Moment Resisting Mr= -82 <br /> Moment Driving Md = 214 <br /> e= (SumMr+ SumMd)/(SumV) <br /> e = (133/513.75) a=0.258ft <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=15.00psf <br /> q = 118.80psf(soil weight above base of leveling pad) <br /> B' = B -2e + Ivlpad = 0.97ft <br /> Gamma=120pcf <br /> Calculate Ultimate Bearing, Quit Quit=15144psf <br /> Bearing Pressure = (SumVert/ B') + (LP width *gamma) sigma = 575.59psf <br /> Calculated Factors of Safety for Bearing Qult/sigma=26.31 <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 />