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SITE STRUCTURES Project Everett Office Building sheet: 3 <br /> 10511 19th Ave SE, Suite C date: 2/7/08 <br /> Everett, WA, (425)-357-9600 prj. no. S-07-188 <br /> Vault Walls - Lateral Pressures Review <br /> Minimum soil cover depth to top of wall: 2 ft <br /> Maximum soil cover depth to top of wall: 2.75 ft <br /> Wall Height: 7.75 ft <br /> At-Rest soil pressure: 50 pcf EFD <br /> Uniform Addition to At-Rest soil pressure: 0 psf <br /> Soil Density: 125 pcf <br /> Load Combinations: <br /> 1.6 L (soil pressure) + 1:6 L(surcharge/wheel load) <br /> 1.6 L (soil pressure) + 1.0 L (seismic) <br /> Due to HS20 Truck Loading: (see appendix A5) <br /> 1.0 ft min cover over lid: 135 psf Uniform <br /> 1.8 ft max cover over lid: 105 psf Uniform <br /> Total Factored Lateral Force: <br /> 1.0 ft min cover over lid: 5317 plf <br /> 1.8 ft max cover over lid: 5410 plf <br /> Due to Uniform Surcharge Load: <br /> Uniform surcharge: 150 psf <br /> Equivalent lateral force: 60 psf Uniform <br /> Total Factored Lateral Force: <br /> 1.8 ft max cover over lid: 4852 plf <br /> Due to Seismic Activity: <br /> Uniform seismic addition: E = 8.5 H <br /> Seismic lateral force: 89 psf Uniform <br /> Total Factored Lateral Force: <br /> 1.8 ft max cover over lid: 4799 plf <br /> Combined Load Factor: 1.51 <br />