COMPLIANCE INFO_1997-2002 - Laserfiche WebLink

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Based upon the results' of the investigation, development of the 'subject property -is geotechnicaily feasible provided that the recommendations presented herein are implemented in the design and construction of the project. In order to provide uniform support for concrete -slabs -on -grade and pavement recompaction of the near -surface soils will be required in the parking area, building pad, and canopy pad as specified in Section 6.9. Shallow wall footings for the building and the square or round column footings for the canopy, as described in Section 2.0, are expected to provide adequate support for the proposed structures. To reduce the potential for detrimental settlement and to provide a uniform bearing capacity for the footings, the shallow foundations should be founded in compacted fill. Canopy footings should extend through the fill specified in Section 6.9 and into the underlying native soils. Footings located adjacent to the underground storage tanks should extend as necessary to provide a minimum embedment of at least 12 inches below a plane of projection up and out at 1:1 from the bottom edge of the tank. Continuous wall footings bearing entirely on engineered recompacted soils, an allowable bearing capacity of 1,500 psf may be incorporated in the design. The building wall footings should be at least at least 12 inches wide, with a minimum 18 -inch embedment depth. The continuous footings should be reinforced with at least four #4 reinforcing bars, two at the top and two at the bottom. It is understood that the column footings supporting the canopy will have a width/diameter of 4 feet with an embedment depth of at least 5 feet. Based on these assumptions, the foundations will be placed on homogeneous undisturbed native materials and an allowable bearing capacity of 1,500 psf may be used in the design. For resistance to transient lateral loads, such as earthquake and wind loads, the above indicated allowable bearing capacities may be increased by one-third. Foundation settlement for the above described foundations and bearing capacities should be less than one -inch total and less than one -half-inch differential between similarly loaded footings of the same size. At the time of concrete placement, the floor slab subgrade should be firm, relatively unyielding, and be at or slightly above (approximately 2 percent) of the optimum moisture content. JN 40007.095-01 ingUnsw497-06jmWjgVo.doo 6-1