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Page 7 <br /> <br />Geotechnical Parameters For Structural Design <br /> <br />For conservative purposes, the following “lowest” code values should be used for <br />structural design, as needed. <br /> <br />a. Allowable vertical bearing earth pressure: 1,500 psf. <br /> <br />An increase of one-third is permitted when using the alternative load <br />combinations that include wind or earthquake loads. <br /> <br />b. Lateral bearing passive earth pressure: 100 psf. per foot into competent materials <br />below the finished ground surface. <br /> <br />An increase of one third is permitted when using the alternative load <br />combinations that include wind or earthquake loads. <br /> <br />c. Lateral Sliding Resistance: cohesion = 130 psf. <br /> <br />The cohesion value is to be multiplied by the contact area. <br /> <br />In no case shall the lateral sliding resistance exceed one-half the dead load. <br /> <br />d. Soil unit weight: 120 pcf. <br /> <br />New Building Footings <br /> <br />In general, the foundation system for the proposed structure must be properly designed by <br />the civil/structural design engineer of record for this project and reviewed and approved <br />by the city prior to construction. <br /> <br />The adequacy for support of the proposed structure of the existing footings should be <br />evaluated by the civil/structural design engineer of record for this project. Underpinning <br />footings can be provided, if needed. <br /> <br />New building footings should be embedded minimum 24-inches below the adjacent <br />lowest finished grade. Minimum widths for isolated columns/pad footings, if any, should <br />be 24-inches, and for continuous wall footings should be 15-inches for one-story and 18- <br />inches for two story portions, if any. <br /> <br />Minimum reinforcement for new continuous footings should be two #5 re-bars at top and <br />two #5 re-bars at bottom. <br /> <br />Settlement <br /> <br />Distress to the existing house due to settlement of the underlying soils was not observed. <br />Therefore, deep-seated settlement of the soils underlying the site is not considered to be a <br />2010 W Alco Ave Unit <br />#24/22/2025