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`d <br /> s <br /> t- Project No. 90161.e <br /> 7 June 1990 <br /> �^ Structural Recommendations <br /> i <br /> Foundations <br /> Ic 1. isolated or continuous shallow spread footings may be <br /> utilized for support of the proposed structures. All of the <br /> I , foundation materials will be competent after preparation in <br /> accordance-with the grading section of this report and are <br /> E :. <br /> considered low to moderately expansive in nature. The soils <br /> should be moisture conditioned. <br /> 2. Continuous foundations should be reinforced with a minimum of <br /> ru' two no. 4 reinforcing bars, one located near the bottom of the <br /> i <br /> footing and one near the top of the stem wall. Footings should <br /> be founded below an imaginary 2 1/2:1 plane projected up from the <br /> bottoms of adjacent parallel footings or open trenches. For a <br /> � } minimum of 18 inch deep footing, with 12 inches minimum width, an <br /> JA allowable dead plus live load bearing pressure of 2,000 p.s.f. <br /> may be utilized for design with a total anticipated settlement of <br /> less than 1/2 inch. <br /> For alternate footing configurations, the following formula m:y <br /> be utilized: <br /> q.allowable - 1300 + 250 D + 100 B <br /> q allowable = Allowable bearing pressure in pounds per <br /> square foot. <br /> D _ Minimum depth of footing in feet. <br /> B Minimum width of footing in feet. <br /> 10 <br />