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1022 S. Hickory Street GE24033 <br />Santa Ana, CA May 21, 2024 <br /> <br />Page 12 of 14 <br />GEOMAX Engineering, Inc. <br /> <br /> <br />Slabs On-Grade and Concrete Pavements <br />Slabs on-grade and concrete pavements should consist of 4 inches of concrete <br />reinforced with # 4 re-bars spaced at 12 inches on center each way entirely supported <br />on native soil. Slabs on-grade and concrete pavements on cut/fill transition areas are <br />not allowed. <br /> Concrete slabs that are to be covered with flooring should be underlain by a <br />plastic vapor barrier (a vapor barrier is not required for slabs-on-grade for garages, <br />parking areas and/or concrete pavements). Per Section 4.505.2.1 of the 2022 California <br />Green Building Standards Code, a 4-inch thick base of ½-inch or larger clean aggregate <br />base materials shall be provided with a vapor barrier in direct contact with concrete and <br />a concrete mix design, which will address bleeding, shrinkage, and curling, shall be <br />used. This base materials layer will protect the plastic sheet while the concrete is being <br />placed. The sub-grade materials should be thoroughly- saturated prior to casting <br />concrete. <br /> <br />Drainage <br />Pad and roof drainage should be collected and conveyed to a Low Impact <br />Development System (LID) via non-erodible conduits. Drainage should not be allowed <br />to pond against the footings. <br /> <br /> <br /> <br />1022 S Hickory St <br />1/9/2025