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CITY OF SANTA ANA <br />Plannft�@eand Building Agency <br />Project No.: 2157-S <br />1433 Cypress Ave, Santa Ana <br />It should be recognized that minor cracks normally occur in concrete slabs due <br />curing or redistribution of stresses and thus, some cracks should be anticipat( <br />not necessarily indicative of excessive vertical movements. It is cautioned the <br />receive ceramic the or other rigid, crack sensitive floor coverings be designed <br />reduce hairline cracking. Extra reinforcing and careful control of concrete <br />shrinkage are recommended. <br />8.4.1 Slab Reinforcement <br />f <br />"Approved <br />IVISSUANCE <br />Such cracks are <br />slabs in areas to <br />Master ID: <br />nd,,constructed to <br />Concrete slabs on grade should be reinforced with at least No. 4 bars spaced 16 inches on <br />centers, both ways. All slab reinforcement should be supported on concrete chairs or brick to <br />ensure the desired placement near mid -depth. <br />The above criteria are recommended to minimize potential distress to floor slabs related to the <br />effects of subgrade soil conditions. The Structural Engineer for the project may need to address <br />other factors that may require modification of the above recommendations. <br />8.4.2 Moisture Barrier <br />The floor slab shall be underlain by a 4-inch thick layer of granular material. A minimum 10-mil <br />synthetic sheet should be placed below the floor slab to serve as a vapor retarder where required <br />to protect moisture sensitive floor coverings and to minimize moisture passing through the floor <br />slab. <br />8.5 Site Grading <br />A preconstruction conference shall be held at the site prior to the beginning of grading operations <br />with the owner, contractor, civil engineer, and soil engineer in attendance. Special soil handling <br />requirements can be discussed at that time. Earthwork shall be observed, and compacted fill tested <br />by a representative of Pacific Geotech who shall also inspect and approve all excavations. Any <br />questionable material encountered during grading should be brought immediately to the attention <br />of Pacific Geotech. <br />PACIFIC GEOTECH, INC. <br />