5604 W Highland St & #2 - 101119017-18 - Plan

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Page 6 should have a very low expansion potential and should be geotechnically observed/tested and accepted by the geotechnical consultant prior to using at the site. In general, grading at the site should be performed in accordance with the requirements of the City and under the geotechnical observation and testing of the project geotechnical consultant. The compaction criterion for fill and backfill materials is a minimum of 90% of the maximum density determined in accordance with ASTM Test Method D1557. 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. 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 “code” values (2019 CBC, Table 1806.2 Material Class 5) can 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 alternative load 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 5604 W Highland St & #2 - 101119017-1811/19/2024