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1807.2 Retaining Walls
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Retaining walls shall be designed to ensure stability against overturning, sliding, excessive foundation pressure and water uplift.
Retaining walls shall be designed for the lateral soil loads set forth in Section 1610. For structures assigned to Seismic Design Category D, E, or F, the design of retaining walls supporting more than 6 feet (1829 mm) of backfill height shall incorporate the additional seismic lateral earth pressure in accordance with the geotechnical investigation where required in Section 1803.2.
Retaining walls shall be designed to resist the lateral action of soil to produce sliding and overturning with a minimum safety factor of 1.5 in each case. The load combinations of Section 1605 shall not apply to this requirement. Instead, design shall be based on 0.7 times nominal earthquake loads, 1.0 times other nominal loads, and investigation with one or more of the variable loads set to zero. The safety factor against lateral sliding shall be taken as the available soil resistance at the base of the retaining wall foundation divided by the net lateral force applied to the retaining wall.
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Wood installed in retaining or crib walls shall be preservative treated in accordance with AWPA U1 for soil and fresh water use ...
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Wood installed in retaining or crib walls shall be preservative treated in accordance with AWPA U1 for soil and fresh water use ...
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