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ST 0 N IE TERRA <br /> WALL SYSTEM <br /> ECCENTRICITY AND BEARING <br /> Eccentricity is the calculation of the distance of the resultant away from the centroid of mass. In wall <br /> ReinDesign the eccentricity is used to calculate an effective footing width, or in rigid structure, it is used to calculate <br /> the pressure distribution below the base. <br /> Calculation of Eccentricity <br /> e= (Sum Mr+ M7 +SumMo)/SumV <br /> Mr=-159,583.62 <br /> Mo=411,113.98 <br /> e = (-159,583.62411,113.98) /101,412.07) e=-4.736 <br /> Because'e' is negative (leaning into the embankment), it is ignored to get the maximum bearing at the face <br /> of the wall. <br /> Calculation of Bearing Pressures <br /> Qult=c* Nc+q * Nq * RW1 + 0.5 *gamma* (B') * Ng * RW2 <br /> where: <br /> Nc=35.49 <br /> Nq =23.18 <br /> Ng =30.21 <br /> c=50.00 psf <br /> RW1 = 1.00 <br /> RW2 = 0.50 <br /> q =240.00 psf <br /> B' =28.00 ft <br /> Calculate Ultimate Bearing, Quit Qult=32,717.25 psf <br /> Applied Bearing Pressures= (SumVert/B' + (2B+ LP depth)/2 * LP depth *gamma) <br /> sigma=3,621.86 psf <br /> Calculated Factors of Safety for Bearing Quit/sigma=9.03 <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 /> UltraWall 5.0.19183 12 <br />