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524 S Shawnee Dr. <br />Santa Ana CA 92704 <br />Settlement <br />When constructed in accordance with the specifications in this report, total settlement is estimated to <br />be 0.25 inch and differential settlement over a 20 foot span less than 0.25 inch. <br />Drainage <br />According to CBC 2022, Chapter 18, 1804.4, Site Grading, the ground immediately adjacent to the <br />foundation shall be sloped away from the building at a slope of not less than one unit vertical in 20 <br />units horizontal (5 percent slope) for a minimum distance of 10 feet measured perpendicular to the <br />face of the wall. If physical obstructions of lot lines prohibit 10 ft of horizontal distance, a 5 percent <br />slope shall be provided at an approved alternative method of diverting water away from the <br />foundation. Swales used for this purpose shall be sloped a minimum of 2 percent within 10 feet of the <br />building foundation. Impervious surfaces within 10 feet of the building foundation shall be sloped a <br />minimum of 2 percent away from the building. <br />Concrete Slab Construction <br />Footing Design <br />Exterior and interior footings for a single story structure should be found 16 inches below the lowest <br />adjacent grade with a minimum width of 12 inches. <br />Two story structures shall have footings 24 inches below the lowest adjacent grade with a minimum <br />width of 12 inches. Reinforcement should consist of four #4 reinforcing bars placed two at the top and <br />two at the bottom of the footing. These reinforcing bars shall be positioned with minimum cover of 2 <br />inches at the center of all continuous footings, properly lapped and tied. <br />Foundation <br />Over excavate all building areas three feet and three feet beyond foundation dimension, or to compe- <br />tent insitu soils as determined by field test during excavation, whichever is deeper. Scarify exposed <br />subgrade 8 inches and moisturize to optimum moisture content. Compact to minimum 90% density <br />and replace soil in 8 inch lifts, moisturize and compact to minimum 90% of maximum density. <br />Paved Areas- General <br />Paved areas consist of concrete patios, sidewalks and driveways. There are different requirements for <br />the preparation of each of these areas. <br />Concrete patios are generally adjacent to the building itself. Proper preparation of the area for con- <br />crete patios is extremely important. Improper compaction or preparation will permit cracks and settle- <br />ment of the paving that are not acceptable. It is required that all areas for concrete patios be excavated <br />12 inches and recompacted to the proper density as described above. <br />5 <br />524 S Shawnee Dr & <br />Unit# 22/7/2025