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Page 7 <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 />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 <br />observed/reported. Therefore, deep-seated settlement of the soils underlying the site is <br />not considered to be a concern for the proposed development. <br /> <br />In general, based on our experience, the conventional total settlement of ½ inch and a <br />differential settlement of ¼ inch over a horizontal distance of 30 feet are anticipated for <br />the proposed new structure and would occur during the construction stage. <br /> <br />New (Interior) Building Slabs-on-Grade <br /> <br />New (interior) building slabs-on-grade should be minimum 5 inches thick, reinforced <br />with #4 re-bars at 12 inches on centers, or equivalent, placed at mid-height of the slab. <br /> <br />New slabs should be underlain by a 2-inch thick layer of clean sand. For moisture <br />sensitive floor areas, the new slabs should be underlain by a 10-mil polyethylene <br />moisture barrier membrane (such as Visqueen). The moisture barrier membrane should <br />FLOOD ZONE - 4810 W Sixth <br />St Unit# 25/5/2025