Chapter 21 Masonry

California Amendments by CEC, DSA and OSHPD

Chapter 21 – Masonry

Office of Statewide Hospital Planning and Development

2101.2.2 [Design methods] Prohibition [OSHPD 1R, 2 & 5]

Added an amendment for structural systems with the prohibition for Items #9 and #10. Added #11 to clarify that limit design method is not permitted since it does not satisfy the ductility requirements of The Masonry Society (TMS) standard, TMS 402 Section 9.3.5.6, which is part of the basis for establishing seismic co-efficient for special reinforced masonry shear walls. Added #12 to clarify that Glass Fiber Reinforced Polymer (GFRP) reinforced masonry is not permitted since the associated seismic design requirements are not addressed in ASCE 7.

2103.6 [Masonry construction materials] Specified compressive strength of masonry and grout [OSHPD 1R, 2 & 5] and referenced TMS 402 Table 4.3.1 – Specified Compressive Strength Requirements

Added an amendment with a table. Existing strength limit in Sections 2105.2, 2107.7 and 2108.4 is consolidated into one section and the format is aligned with TMS 402 Table 4.3.1. Increased minimum specified design strength of concrete masonry from 1,500 psi to 2,000 psi for consistency with TMS 402 and ASTM C90.

2104.2 Reinforced grouted masonry [OSHPD 1R, 2 & 5]

Repealed amendment related to group pour heights to permit Self-Consolidating Grout (SCG) for construction of masonry since it is cheaper, requires less time for construction and provides better quality.

2107.4 Reserved (formerly TMS 402 Section 8.3.7 Maximum bar size)

Repealed limitation on maximum bar size as the clearance requirements in TMS are adequate to prevent larger bar diameters and made this amendment unnecessary.

2107.6 Repealed (formerly TMS 402 Section 8.3.4.4 Walls)

Repealed pointer for maximum tensile reinforcement ratio in walls as this requirement applies to both strength design and allowable stress.

2107.6 Masonry Compressive Strength

Deleted existing amendments since new model code language addresses the minimum specified design strength of concrete masonry. Masonry compressive strength requirements are moved to CBC Section 2103.6.

2108.4 TMS 402 Section 9.1.9.1.1.

Deleted existing amendments since new model code language addresses the minimum specified design strength of concrete masonry. Masonry compressive strength requirements are moved to CBC Section 2103.6.

California Energy Commission

2109.2.4.8.2 Vapor permeance

Added an amendment referring to Table 1202.3.1 to distinguish between climate zones identified in ICC model codes and climate zones that are identified in the California Energy Code.

Division of the State Architect

2115 Additional requirements for community colleges [DSA-SS/CC]

Reorganized section 2115 to align with Chapter 21A sections.

2115.1.1 Prohibitions

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

2115.2.3 Specified compressive strength of masonry and grout

Reformatted existing amendment to align with the current TMS 402 formatting.

2115.4.1 Mortar and grout tests. TMS 602, Article 1.4B Compressive Strength Determination

Added amendment to eliminate testing of preblended mortars with specified documentation.

2115.5.2 TMS 402, Section 7.3.2.5 (i)

Amended TMS triggers requiring horizontal reinforcement terminating in hooks.