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i <br /> I SHANNON F�WILSON.INC. <br /> ► Removal of unsuitable bearing soils and proper compaction of newly placed <br /> ' structural fili. <br /> ► Minimum footing embedment of 18 inchcs below the lowest adjacent ac0erior <br /> Igrade and 12 inches below the lowest adjacent interior gcade. <br /> ► Minimam width of 18 inches for continuous footings and 24 inches for column <br /> Ifootings. Minimum widths may govern the foodng design. <br /> ► If a foodng bears in compacted structural 811, extending Sll bcy�ond the edges of <br /> ithe toofing a distance equal to the thickness of fill below the footing. <br /> ► Evaluadon of each footing excavation by a geotechnical engineer w determine the <br /> � presence of wmpetent bearing soils. This should be done immediately prior to the <br /> placement of steel and concrete. Soils idendfied as soft, loose, or otherwise <br /> Iunsuitable should be removed. <br /> 7btal foodng settlements are es6mated to be on the order of 1/2 to 3/4 inch, prwided the <br /> abwe-listed recommendations are follorwed, Differendal settlements betwcen adjacent <br /> column footings and aver a 20-foot lengch of a continuous foodng are estimated W be about <br /> I3/4 of the abwe-mentioned settlements. The majority of setUemenis would occur almost <br /> instantaneously with load application. <br /> 8.6 i aerP�r 1 Resic�nrr and Seicmic Dzsi n <br /> , Resistance to lateral fonces will be pmvided by passive earth pmssure acting against the <br /> embedded portion of foundadons and by frictional resistance at the base of the foundations. <br /> � The followin <br /> g passive equivalent fluid pmssums (EFPs) should be used in the design: <br /> Ig�v the Subdrain �elow the Subd�ain <br /> I 3� P� 150 pcf <br /> 1'hese EFP values have been reduced by a factor of 1.5 to limit deflections and assume the <br /> follvwing: <br /> j ► The foundations bear at least 18 inches below the lowest adjacent exterior gcade. <br /> i <br /> ` W-6693-01 <br /> 24 <br />