Chapter 21 — MASONRY

Section 2105 — QUALITY ASSURANCE

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

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2105.1 General.

2105.1 General. A quality assurance program shall be used to ensure that the constructed masonry is in compliance with the approved construction documents. The quality assurance program shall comply with the inspection and testing requirements of Chapter 17 and TMS 602.

2105.2 Compressive strength , f ′ m .

2105.2 Compressive strength , f ′ m . [OSHPD 1R, 2 & 5] Testing of masonry shall be provided in accordance with TMS 602, Article 1.4 B. Exception: Where values of f ′ m greater than 2,000 psi (13.79 MPa) are used in the design of reinforced grouted multi-wythe masonry and reinforced hollow unit masonry, they shall be based on prism test results in accordance with TMS 602, Article 1.4 B.3 submitted by the architect or engineer to the enforcement agency which demonstrate the ability of the proposed construction to meet prescribed performance criteria for strength exceed 3,000 psi (20.7 MPa).…

2105.3 Mortar and grout tests.

2105.3 Mortar and grout tests. [OSHPD 1R, 2 & 5] TMS 602, Article 1.4 B Compressive strength determination. Modify TMS 602, Arti- cle 1.4 B as follows by adding: 5. Additional testing requirements: a. At the beginning of all masonry work, at least one test sample of the mortar shall be taken on 3 successive working days and at 1-week intervals thereafter. Where mortar is based on a proportion specification, mortar shall be sampled and tested during construction in accordance with ASTM C780, including Annex 4, to verify the proportions specified in ASTM C270, Table 2. Where mortar is based on…

2105.4 Masonry core testing .

2105.4 Masonry core testing . [OSHPD 1R, 2 & 5] Two cores shall be taken from each building for each 5,000 square feet (465 m [2] ) of the masonry wall area or fraction thereof. The approved agency shall perform or observe the coring of the masonry walls and sample loca- tions shall be subject to approval of the registered design professional. Core samples shall comply with the following: 1. Cored no sooner than 7 days after grouting of the selected area; 2. Be a minimum of 3 [3] / 4 inch (95.25 mm) nominal diameter; and 3. Sampled in such a manner as to exclude any masonry unit webs, mortar…