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Spiess Rancho Subdivision <br /> Page No. 4 <br /> Grading recommendations <br /> In order to provide suitable building pads for the <br /> proposed houses, the building pad areas should be cleared and <br /> stripped as recommended in Appendix A, Engineered Fill <br /> Specifications. After the clearing operations, the subgrade <br /> thus exposed should be scarified for a depth of 8 inches, and <br /> _ recompacted as indicated in Appendix A. Fill, if required, <br /> that is placed on the building pads should be placed as <br /> engineered fill as recommended in Appendix A. Fill should <br /> extend a minimum of 5 feet beyond footing lines. On site non- <br /> clay soils are suitable for use as engineered fill. <br /> Foundation recommendations <br /> If grading is accomplished as specified foundations may <br /> consist of conventional spread footings. Minimum width of <br /> footings is 12 inches. Minimum depth of footings is 18 inches <br /> for either single or two story. If no clay soils are present, <br /> footings should be continuously reinforced with 1-#4 bars top <br /> and bottom (total of 2 bars) . if clay soils are present, <br /> footings should be continuously reinforced with 2 - #4 bars <br /> top and bottom (total of 4 bars) . Foundations constructed in <br /> this manner may be loaded to a bearing capacity of 2500 pounds <br /> per square foot total load. Bearing capacity may be increased <br /> by 1/3 for temporary wind and seismic loads. <br /> Four inches of clean gravel should be placed beneath the <br /> slab-on-grade. This gravel should be well graded between a <br /> maximum size of 1 inch and a minimum size of 1/4 inch with <br /> zero percent passing the No. 4 sieve. The gravel should be <br /> covered by a impervious vapor barrier such as 6 mil visqueen <br /> or equivalent. The visqueen should be covered by 1 to 2 <br /> inches of sand to protect it during construction and to aid in <br /> curing the concrete. If clay soils are present, it is <br /> recommended that the slab be a minimum of 4 inches thick and <br /> be reinforced with 6 x 6 x 2 . 1mm x 2. 1mm (6,6,#10,#10) wire <br /> mesh or #3 bars at 18 inch centers both ways. The slab should <br /> be tied to the footings with #4 dowels at 24 inch centers . <br /> Dowels should extend a minimum of 24 inches into the slab. <br /> Special Foundation Treatment (If clay soils are present) <br /> s <br /> � Z W <br /> Q ~ <br /> P <br /> 4550 G� <br />