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-. <br /> Sierra Construction Services, Inc. <br /> July 1 . 1992 JN 92276 <br /> Page 6 <br /> Paramet�� Design <br /> Vai �. <br /> Coefficient of Friction 0.40 <br /> Passive Earth Pressure 350 pcf <br /> � Where: <br /> (1 ) Pcf is pounds per cubic foot <br /> , (2) Passive earth pressure is computed <br /> using the equivalent fluid density. <br /> If the ground in front of the foundation is loose or sloping , <br /> the passive earth pressure given above will not be <br /> eppropriate. we recommend that a safety factor of et least 1 .5 <br /> be used for design of the foundation's resistance to laterel <br /> loading. <br /> SEISMIC CON ID RATIONS <br /> The site is located within Seismic 2one 3 es illustrated on <br /> Figure No. 2 of the 1988 Uniform euilding Code (UBC) . �� <br /> , accordance with Table 23-J of the 1988 uBC, the site soil <br /> so�ls�havesa lowtpotentsaltforbsePsmfc� liquefact?on, 7he site <br /> $IABS-ON-GRAD <br /> The building floors may be constructr_d as slebs-on-g rade atop <br /> et least 12 inches of compacted fi11 soils placed over <br /> competent native soils. This will require stripping of <br /> existing fi11 soils . The sub�rade soiis must be in a firm, <br /> . non-yielding condition at the time of slab construction. Any <br /> soft areas encountered should be excayated and replaced with <br /> select imported structural fill . <br /> All slabs-on-grade should be underlein by a cepillary break <br /> layer consisting of a minimum four (4) inch thickness of free- <br /> drainin� granular structurel fill with e gradation similar to <br /> that dtscussed leter it1 pEgbANENT FOUNDATION AND R TAiNiur <br /> wa � s . In areas where the passa�e of moisture through the <br /> membraneu�shouldbbe �placedpbeneath1etheucslab.e 6Additionallyc <br /> sand should be used in the fine grading process to reduce <br /> damage to the vapor barrier and to provide uniform support <br /> under the slab. <br /> GEOTECH CONSULTANTS , INC. <br />