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ECCENTRICITY AND 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 +W2+ LL+ Pa_v+ Pq_v) <br /> e = U2 -(SumMr+ MLL-SumMo)/(SumV+ LL) <br /> e=4.92/2 -(12,381 /7,_286.86) e=0.759 ft <br /> Calculation of Bearing Pressures <br /> Qult= c* Nc+q *Nq + 0.5*y*(B)* Ng <br /> where: <br /> Nc=42.16 <br /> Nq =29.44 <br /> Ng =41.06 <br /> c=0.00 psf <br /> q =287.50 psf <br /> B' = B-2e+ IvIpad = 3.90 ft <br /> Gamma(LP)=130 pcf <br /> Calculate Ultimate Bearing, Qult Qult=18,469 psf <br /> Bearing Pressure= (SumVert/B')+ ((2B + LP depth)/2 * LP depth *gamma) sigma=1930.12 psf <br /> Calculated Factors of Safety for Bearing Quit/sigma=9.57 <br /> y4 <br /> /9/73 <br /> UltraWall 5.0.18138 Page" <br />