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Project No.: 2157-S <br />1433 Cypress Ave, Santa Ana <br />An allowable bearing value of 1,500 pounds per square foot is recommE <br />footings of at least 12 inches in width and isolated pad footings of at least 24 i <br />CITY OF SANTA ANA <br />Plangd arr�_Building Agency <br />Approved <br />FOR PERMIT ISSUANCE <br />Master ID: <br />d,4ar. continuous <br />at a depth of at least 24 inches below the existing grade, embedded into undisturbed natural soils. <br />The bearing values are for dead plus live loads and may be increased by one-third for momentary <br />wind or seismic loads. <br />8.3.2 Lateral Design <br />Resistance to lateral loading may be provided by passive earth pressure within the soils and by <br />friction acting at the base of foundations and slabs on grade. Passive earth pressure may be <br />computed as an equivalent fluid having a density of 100 pounds per cubic foot to a maximum of <br />2,000 pounds per square foot. <br />Friction between the base of the footings and/or floor slabs and the underlying soils may be <br />assumed to be 0.25 times the dead load. When combining passive pressure and friction for lateral <br />resistance, the passive component should be reduced by one-third. <br />8.3.3 Foundation Settlement <br />The seismic settlements are in addition to the static settlements and must be considered in the <br />structural design. The total static settlement of the foundations is estimated not to exceed three <br />quarters of an inch. Differential settlement between adjacent footings is expected not to exceed <br />half of the total static settlement over a distance of 30 feet. <br />8.4 Slabs on Grade <br />Concrete slabs constructed on grade should be a minimum thickness of 4 inches. The subgrade <br />below concrete slabs shall be pre -saturated to a depth of 18 inches prior to placing the concrete. <br />On -grade concrete slabs shall be placed on a 2-inch clean sand bed over a moisture barrier <br />membrane to mitigate expansion potential. <br />Subgrade soils disturbed due to installation of utility lines or from footing excavations should either <br />be completely removed or be properly compacted prior to concrete pour. <br />PACIFIC GEOTECH, INC. <br />