Chapter 18A — SOILS AND FOUNDATIONS
Section 1807A — FOUNDATION WALLS, RETAINING WALLS AND EMBEDDED POSTS AND POLES
2025 California Building Code (Title 24, Part 2) · 2025 edition · ingested 2026-07-07 · California
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1807 A .1 Foundation walls. Foundation walls shall be designed and constructed in accordance with Sections 1807 A .1.1 through 1807 A .1.6. Foundation walls shall be supported by foundations designed in accordance with Section 1808 A . 1807 A .1.1 Design lateral soil loads. Foundation walls shall be designed for the lateral soil loads determined by a geotechnical investigation, in accordance with Section 1803A. 1807 A .1.2 Unbalanced backfill height. Unbalanced backfill height is the difference in height between the exterior finish ground level and the lower of the top of the concrete footing…