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Earlier editions: 20222019

Appendix BK — COB CONSTRUCTION (MONOLITHIC ADOBE)

BK110 Referenced Standards — 2025 California Residential Code

California Residential Code (Title 24, Part 2.5) · 2025 edition · updated 2026-10-19 · California

CBSC: official editions, supplements and errata

Italicized text is a California amendment to the model code, as printed in the official publication.

Cite as: 2025 California Residential Code (Title 24, Part 2.5) § BK110 · Effective January 1, 2026 · Official source: Building Standards Commission

BK110.1 General.

See Table BK110.1 for standards that are referenced in various sections of this appendix. Standards are listed by the standard identification with the effective date, the standard title and the section or sections of this appendix that reference the standard.

TABLE BK110.1—REFERENCED STANDARDS

STANDARD
ACRONYM
STANDARD NAME SECTIONS
HEREIN REFERENCED
ASTM C5—10 Standard Specification for Quicklime for Structural Purposes BK104.4.6
ASTM C141/C141M—14 Standard Specification for Hydrated Hydraulic Lime for Structural Purposes BK104.4.6
ASTM C206—14 Standard Specification for Finishing Hydrated Lime BK104.4.6
ASTM C926—21 Specification for Appliance of Portland Cement-Based Plaster BK104.4.8
ASTM C1707—11 Standard Specification for Pozzolanic Hydraulic Lime for Structural Purposes BK104.4.6
ASTM E2392/E2392M—10(2016) Standard Guide for Design of Earthen Wall Building Systems BK104.4.3.2
ASTM BS1, ASTM BS EN 459—15 Building Lime—Part 1: Definitions, Specifications and Conformity Criteria;
Part 2: Test Methods
BK104.4.6

CALIFORNIA RESIDENTIAL CODE – MATRIX ADOPTION TABLE APPENDIX BL – HEMP-LIME (HEMPCRETE) CONSTRUCTION

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user. See Chapter 1 for state agency authority and building applications.)

Adopting agency BSC BSC-CG SFM HCD 1 HCD 2 HCD 1/AC DSA AC DSA SS DSA SS/CC OSHPD 1 OSHPD 1R OSHPD 2 OSHPD 3 OSHPD 4 OSHPD 5 BSCC DPH AGR DWR CEC CA SL SLC
Adopt entire chapter
Adopt entire chapter as amended (amended sections listed below) X
Adopt only those sections that are listed below
Chapter / Section
BL 105 X
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