Chapter 21 — MASONRY

Section 2109 — EMPIRICAL DESIGN OF ADOBE MASONRY

2025 California Building Code (Title 24, Part 2) · 2025 edition · ingested 2026-07-07 · California

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[OSHPD 1R, 2 & 5] Not permitted by OSHPD .

2109.1 General.

2109.1 General. Empirically designed adobe masonry shall conform to the requirements of Appendix A of TMS 402—16, except where otherwise noted in this section. 2109.1.1 Limitations. The use of empirical design of adobe masonry shall be limited as noted in Section A.1.2 of TMS 402—16. In buildings that exceed one or more of the limitations of Section A.1.2 of TMS 402—16, masonry shall be designed in accordance with the engineered design provisions of Section 2101.2 or the foundation wall provisions of Section 1807.1.5. Section A.1.2.3 of TMS 402—16 shall be modified as follows: A.1.2.3 – Wind.…

2109.2 Adobe construction.

2109.2 Adobe construction. Adobe construction shall comply with this section and shall be subject to the requirements of this code for Type V construction, Appendix A of TMS 402—16, and this section. 2109.2.1 Unstabilized adobe. Unstabilized adobe shall comply with Sections 2109.2.1.1 through 2109.2.1.4. 2109.2.1.1 Compressive strength. Adobe units shall have an average compressive strength of 300 psi (2068 kPa) when tested in accordance with ASTM C67. Five samples shall be tested and individual units are not permitted to have a compressive strength of less than 250 psi (1724 kPa). 2109.2.1.2…