Chapter 21A Masonry

California Amendments by DSA and OSHPD

Chapter 21A – Masonry

Division of the State Architect and
Office of Statewide Hospital Planning and Development

2101A.1.3 Prohibition

Edited structural amendments regarding prohibition of certain TMS 402/602 materials and methods.

2103A.6 [Masonry Construction Materials] Specified Compressive Strength of Masonry and Grout

Consolidated the existing strength limits in Sections 2105A.2, 2107A.6 and 2108A.4 into one section and aligned the format with added TMS 402, Table 4.3.1.

2104A.1.3.7 Reserved

Repealed existing amendment. Reference standard now incorporates specified language.

2105A.2 Compressive strength, f’m

Repealed amendment language related to strength of masonry that is now included in and addressed by CBC 2103A.6.

2105A.3 Mortar and grout tests. TMS 602, Article 1.4 B Compressive Strength Determination

Updated ASTM reference for preblended mortar. Clarified testing requirements for pre-packaged mortars may be eliminated with specified documentation.

2105A.4 Masonry core testing

Revised language to further clarify requirements for coring operations and reporting requirements of testing laboratories. Adds requirements from the design professional and the enforcement agency where additional coring will be performed.

2106A.1 Seismic design requirements for masonry
2106A.1.3 TMS 402, Section 7.3.2.5 (i)

Added a new section that amends the TMS trigger requirements for horizontal reinforcement terminating in hooks to provide a more ductile design.

2107A.6 Masonry Compressive Strength
2108A.4 TMS 402 Section 9.1.9.1.1

Consolidated previous existing amendments into new code section 2103A.6.

Office of Statewide Hospital Planning and Development

2103A.6 [Masonry Construction Materials] Specified Compressive Strength of Masonry and Grout TMS Table 4.3.1 Specified Compressive Strength Requirements

Increased minimum specified design strength of concrete masonry from 1,500 psi to 2,000 psi for consistency with TMS 402 and ASTM C90.

2107A.5 Allowable stress design TMS 402, Section 8.3.4.4

Repealed pointer for maximum tensile reinforcement ratio in walls as this requirement applies to both strength design and allowable stress.

Division of the State Architect

2104A.1.3.5 TMS 602, Article 3.5 C Grout pour height

Amended language related to grout pours and grout lifts. Added amended Table 7 from TMS specifying requirements for grout space and grout pour height limits. Added footnotes 4 and 5 to Table 7. Deleted requirement for grout admixture.