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<br />Elevation Sample Calculation Step 2: Compute Lateral Loads <br /> <br />Elevation Sample Calculation <br /> <br />Wind Parallel to Ridge <br /> <br />Walls: <br />Wmdward: <br />(inward) <br />Leeward: <br />(outward) <br /> <br />P = 19.5 psf(0.8) <br />P = 19.5 psf(O.5) <br /> <br />Roof: <br /> <br />P = 18.5 psf(0.7) <br />P = 19.5 psf(0.7) <br /> <br /> <br />Seismic <br /> <br />= 15.6 psf (25 ft) <br />= 9.8 psf (25 ft) <br /> <br />= 13.0 psf (20 ft) <br />= 13.7 psf (25 ft) <br /> <br /> <br />Since the house is being elevated, thepoten1ia1 for seismic loadingloverturning design loads will <br />be increased on the horne, Depending upon the amount of elevation, additional bracing of the <br />roof or walls may be necessary. <br /> <br />Reference: 1991 UnifonnBuildingCode <br /> <br />Seismic Zone 2B has been detennined for this home (Figure 23-2 in 1991 UBC and verification <br />with local building official), <br /> <br />14 of 44 <br /> <br />VI - E.59 <br /> <br />, Engineering Principles and Practices of Retrofitting Flood-Prone Residential Structures <br />January 1995 <br />