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24-8009 Page 14 structures and anticipated traffic, including construction equipment, when loading is within a distance from the shoring equal to the depth of excavation. All excavations should conform to CAL-OSHA and local safety codes. The stability of temporary excavation is the responsibility of the contractor. However, as a minimum the lateral movement at the top of the shoring soldier piles should be monitored. Lateral deflection of 0.5 inches or more shall be brought to the attention of TGR with remedial measures. If lateral deflection exceeds 1.0-inch, work shall stop, and mitigation measures taken prior to continuing work. TGR should be present to observe the excavation to provide additional recommendations as considered necessary depending on the exposed condition. Soldier piles shall have a minimum diameter of eighteen (18) and shall be spaced at least two diameters on centers, a lateral passive resistance of 250 psf/ft of embedment depth into competent alluvium with a maximum lateral passive resistance of 2,500 psf should be used in design. The minimum recommended embedment is 10 feet into competent alluvium. The point of fixity may be taken as 2 feet below proposed excavation bottom. The shoring design engineer may utilize this passive pressure over one to two pile diameters at their discretion/design procedure. The shoring design engineer is however responsible for the performance of the shoring system. Soldier pile members placed in drilled holes should be properly backfilled with sand/cement slurry or lean concrete in order to develop the required passive resistance. The lagging between the soldier piles may be designed for a maximum nominal pressure of 400 psf, and should consist of wood members, or solid plywood or steel sheets. All excavations should conform to CAL-OSHA and local safety codes. Geotechnical Observation/Testing During Construction Per sections 1705.6 and table 1705.6 of the 2022 California Building Code, periodic special inspection shall be performed to: • Verify materials below shallow foundations are adequate to achieve the design bearing capacity; • Verify excavations are extended to the proper depth and have reached proper material; • Verify classification and test compacted materials; and • Prior to placement of compacted fill, inspect subgrade and verify that the site has been prepared properly Per sections 1705.6 and table 1705.6 of the 2022 California Building Code, continuous special inspection shall be performed to: • Verify use of proper materials, densities and lift thickness during placement and compaction of compacted fill. The geotechnical consultant should perform observation and/or testing at the following stages: • During any grading and fill placement; • Prior to pouring foundation or flatwork concrete; • During trench excavation; • Excavation bottom; • Placement of bedding material; 2039 N Victoria Drive #24/28/2025