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ENGEO <br /> INCORPORATED <br /> <br /> <br />5150.100.101 <br />May 2, 2008 Page 20 <br /> <br />7.4 REINFORCEMENT <br /> <br />The structural engineer should design footing reinforcement to support the intended structural <br />loads without excessive settlement. Reinforce all continuous footings with top and bottom steel <br />to provide structural continuity and to permit spanning of local irregularities. At a minimum, <br />design continuous footings to structurally span a clear distance of 5 feet. <br /> <br />7.5 FOUNDATION LATERAL RESISTANCE <br /> <br />Lateral loads may be resisted by friction along the base and by passive pressure along the sides <br />of foundations. The passive pressure is based on an equivalent fluid pressure in pounds per cubic <br />foot (pcf). We recommend the following allowable values for design: <br /> <br />Passive Lateral Pressure: 300 pcf <br /> <br />Coefficient of Friction: 0.3 <br /> <br />The above allowable values include a factor of safety of 1.5. Increase the above values by <br />one-third for the short-term effects of wind or seismic loading. <br /> <br />Passive lateral pressure should not be used for footings on or above slopes. <br /> <br />7.6 SETTLEMENT <br /> <br />Provided our report recommendations are followed, and given the proposed construction <br />(Section 1.3), we estimate total and differential foundation settlements will be less than <br />approximately ¾ and ½ inch, respectively. <br />