FLOOD ZONE - 4610 W Melric Dr & 406 S Andres Pl - Plan

Home Browse Search

CITY OF SANTA ANA Planning and Building Agency Cattl am ant Approved FOR PERMIT ISSUANCE As previously mentioned, the subject site is a previously graded lot whereas exist..1: u es. The underlying soils were previously properly treated, as necessary, aubSreeviously evaluated to be suitable for structural support prior to approval for cons coon of the existing house. Distress to the existing house due to settlement (and)or y ottTeT geotechnical issues) was not observed / reported. Therefore, deep-seated settlement of the soils underlying the site is not considered to be a concern for the proposed new structures. In general, based on our experience, the conventional total settlement of 1/2 inch and a differential settlement of 1/4 inch over a horizontal distance of 30 feet are anticipated for the proposed new structure and would occur during the construction stage. New (Interior,) Building Slabs -on -Grade New (interior) building slabs -on -grade should be minimum 5 inches thick, reinforced with #4 re -bars at 12 inches on centers, or equivalent, placed at mid -height of the slab. New slabs should be underlain by a 2-inch thick layer of clean sand. For moisture sensitive floor areas, the new slabs should be underlain by a 10-mil polyethylene moisture barrier membrane (such as Visqueen). The moisture barrier membrane should be properly lapped and sealed at joints and around any breaks such as openings for utility conduits. Note: CAL Green Code, and/or other applicable codes/City's requirements should govern and be followed. The entire slab -on -grade system including the capillary break / vapor/moisture retarder should be properly designed by the project civil /structural design engineer of record (but not by the geotechnical engineer) and reviewed and approved by the City prior to construction. New Exterior Slabs -on -Grade To reduce the potential for excessive cracking, new exterior concrete slabs -on -grade, if any, should be minimum 4 inches thick, provided with construction or weakened plane joints at frequent intervals (e. g., every 6 feet or less). Provision of a 2-inch thick layer of crushed rock, gravel, or clean sand to be placed beneath the slabs and/or reinforcement, such as #3 re -bars at 24 inches on -centers, or equivalent, placed at the mid -height of the slab should be considered. The subgrade soils for the exterior slabs should be properly re - compacted. Slab Subgrade Pre -Saturation The conventional pre -saturation of subgrade soils to minimum 140% of the optimum moisture content to minimum 24 inches deep is not considered necessary for this project. However, spraying with water should be performed prior to concrete pour. Page 8