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1022 S. Hickory Street GE24033 <br />Santa Ana, CA May 21, 2024 <br /> <br />Page 8 of 14 <br />GEOMAX Engineering, Inc. <br /> <br /> <br />Lateral Design <br /> Resistance to lateral loads may be derived from the skin frictional forces acting <br />at the base of footings and by passive pressure. <br /> The friction coefficient for use with dead load forces is 0.25 for native soils. <br />The unit passive pressure for the first foot of depth using both internal frictional and <br />cohesive shear strength components for the first foot of depth is 300 psf for native soils. <br />This value maybe increased 50 percent for each additional foot of depth to a maximum <br />of 3,000 pcf for native soils. <br />Thee passive and skin frictional components are combined, the passive <br />components should be reduced by a factor of one-third. The passive pressure allowed <br />is for the total of dead and frequently applied live loads and may be increased by one- <br />third for short duration wind and seismic loading. <br /> <br />Settlement <br /> Settlement of the foundation is expected to occur immediately upon initial load <br />application. Maximum settlement is expected to be less than ½-inch and differential <br />settlement is expected to be less than ¼-inch provided all foundations are supported as <br />recommended. <br /> <br /> <br /> <br /> <br />1022 S Hickory St <br />1/9/2025