FLOOD ZONE - 512 & 514 N Huylars Ln - Plan

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Drainage CITY OF SANTA ANA Planning and Building Agency 518 Huylars Ln Santa Ana CA 92703 Approved According to CBC 2022, Chapter 18, 1804.4, Site Grading, the ground immediat ly O R P E R o tl e S S U A N C E foundation shall be sloped away from the building at a slope of not less than one unit vertical in 20 units horizontal (5 percent slope) for a minimum distance of 10 feet measured pe albr to the face of the wall. If physical obstructions of lot lines prohibit 10 ft of horizontal isle, a 5 percent slope shall be provided at an approved alternative method of diverting water aw4 from the foundation. Swales used for this purpose shall be sloped a minimum of 2 percent within 10 feet of the building foundation. Impervious surfaces within 10 feet of the building foundation shall be sloped a minimum of 2 percent away from the building. Concrete Slab Construction Footing Design Exterior and interior footings for a single -story structure should be found 16 inches below the lowest adjacent grade with a minimum width of 12 inches. Two story structures shall have footings 24 inches below the lowest adjacent grade with a minimum width of 15 inches. Reinforcement should consist of four #4 reinforcing bars placed two at the top and two at the bottom of the footing. These reinforcing bars shall be positioned with minimum cover of 3 inches at the center of all continuous footings, properly lapped and tied. Foundation Over excavate all building areas three feet and three feet beyond foundation dimension, or to compe- tent insitu soils as determined by field test during excavation, whichever is deeper. Scarify exposed subgrade 8 inches and moisturize to optimum moisture content. Compact to minimum 90% density and replace soil in 8 inch lifts, moisturize and compact to minimum 90% of maximum density. Paved Areas- General Paved areas consist of concrete patios, sidewalks and driveways. There are different requirements for the preparation of each of these areas. Concrete patios are generally adjacent to the building itself. Proper preparation of the area for con- crete patios is extremely important. Improper compaction or preparation will permit cracks and settle- ment of the paving that are not acceptable. It is required that all areas for concrete patios be excavated 12 inches and recompacted to the proper density as described above. Floor Slabs The concrete slab design shall be in accordance with the provisions of Cal Green 2022. Floor slab requirements: Aggregate Base: A 4-inch-thick base of 1/2 inch or larger clean aggregate is required. Vapor Retarder: a vapor retarder must be in direct contact with the concrete. Concrete Mix Design: The concrete mix design needs to address issues like bleeding, shrinkage, and curling.