1927 & 1929 S Hickory St - Plan - Laserfiche WebLink

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Temporary Excavations In general, temporary excavations should be performed in accordance with OSHA requirements. In general, care should be taken during excavation near an existing structural object, if any to ensure no damage is done to the existing object. In general, based on our experience with many similar projects in the City of Santa Ana, temporary excavation next to existing building footings does not affect the existing footings. However, if needed, excavations in sections, about 10 to 15 ft. long can be performed. This will be determined by the geotechnical engineer of record based on the conditions to be exposed during excavation. The above temporary excavation recommendations can be changed by the geotechnical consultant based on conditions to be exposed in the field during excavations BUILDING FOUNDATION DESIGN GUIDELINES Geotechnical Parameters For Structural Design For conservative purposes, the following "lowest" code values should be used for structural design, as needed. A. Allowable vertical bearing earth pressure: 1,500 psf. An increase of one-third is permitted when using the combinations that include wind or earthquake loads. B. Lateral bearing passive earth pressure: 100 psf. per foot into competent materials below the finished ground surface. An increase of one third is permitted when using the alternative load combinations that include wind or earthquake loads. C. Lateral Sliding Resistance: cohesion = 130 psf. The cohesion value is to be multiplied by the contact area. In no case shall the lateral sliding resistance exceed one-half the dead load. D. Soil unit weight: 120 pcf. New Building Footings In general, the foundation system for the proposed structure must be properly designed by the civil/structural design engineer of record for this project and reviewed and approved by the city prior to construction. The adequacy for support of the proposed structure of the existing footings should be evaluated by the civil/structural design engineer of record for this project. Underpinning footings can be provided, if needed. 1927 & 1929 S Hickory St2/12/2025