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Novembez S, 2004 <br />3ob No. 264~.100 <br />page ~ <br /> <br />"9. <br /> <br />Finished permanent cut and fill side slopes less limn 10' high should not exceed an <br />inclination of 2H:lV. <br />Observations and soil density, tests should be carried out during grading to assist the <br />contractor in obtaining the required degree of compaction a_rld tile plOpeT IIIoisIEI'¢ <br />content, Where compaction is less than specified, additional compacQve effort <br />should be made with adjustment of the moisture content ~s necessary un'd] the <br />specified compaction and moisture content are obtained. <br />The soil engineer should be notified at least 48 hours prior to any grading operation. <br />The procedure and methods of grading may %hen be discussed between the contractor <br />and the soil engineer, <br /> <br />FOUNDATIONS <br />From a geotechnical engineering standpoint, the proposed house can be supported on either <br />conventional rcinfurced or post-tension concrete slab foundations, The slab foundations should <br />be designed by a structural engineer to accommodate l 'A-roches total soil movement and ½-tach <br />in 25 horizontal feet differential soil movement without structural disu'ess to the 'slab and <br />excessive ,deflections in the building framing and wall finishes. We recommend that the <br />fell'owing criteria be incorporated in ~e desi~ of the slab foundations: <br /> x. liowabIe Bearing Capacity (ms)' i'~cre~e by a for I <br /> ;eismic and wind load) <br /> Passive Equivalent Fluid Pressure (neglect the upper ) I 250 pcf <br /> foot if the ground surface is not confined by slabs or [ · <br /> )~vement) ' 03 <br /> B~e Friction Coefficient ~ 15 feet <br /> Minimum Interior Sp~n <br /> "-~inJmum perimet~;r Cantilever ~ 5 feet ~ <br /> Edge Moisture Variation Distance 5.5 feet <br /> Caner Lift 3.0 feet <br /> Edge Lif~ <br /> Differential Swell 3.2inches <br /> Center Lift 0A2 inches , <br /> Edge Lift 8 inches <br /> Minimum'Slab Thickness <br /> Prior to concrete plaoement the upper 12 inches of the clayey subgrade soils should be pre- <br /> saturated to at leas~ 5 percent above optimum moisture cement. The pre-saturated p~d should not <br /> be allowed to dry-out to less than the recommended moisture content prior to ooncrete <br /> placement. Moisture content of the subgr~de should be checked immediately prior zo the <br /> placement of capilluy moisture break or concrete placement. <br /> <br />.~=., n.R.E.C..E.I.V.E_D_T. IMEHi~OV, 8,2110: ~2AMI'ANTS <br /> <br /> <br />