Chapter 21 — MASONRY

Section 2107 — ALLOWABLE STRESS DESIGN

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

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2107.1 General.

2107.1 General. The design of masonry structures using allowable stress design shall comply with Section 2106 and the requirements of Chapters 1 through 8 of TMS 402 except as modified by Sections 2107.2 through 2107.3 [OSHPD 1R, 2 & 5] through 2107.5.

2107.2 TMS 402, Section 6.1.7.1, lap splices.

2107.2 TMS 402, Section 6.1.7.1, lap splices. As an alternative to Section 6.1.7.1, it shall be permitted to design lap splices in accordance with Section 2107.2.1. 2107.2.1 Lap splices. The minimum length of lap splices for reinforcing bars in tension or compression, l d, shall be: Equation 21-1 l d = 0.002 d b f s For SI: l d = 0.29 d b f s but not less than 12 inches (305 mm). The length of the lapped splice shall be not less than 40 bar diameters. In regions of moment where the design tensile stresses in the reinforcement are greater than 80 percent of F s, the lap length of splices shall…

2107.3 TMS 402, Section 6.1.7, splices of reinforcement. Add to Section 6.1.7 as follows:

2107.3 TMS 402, Section 6.1.7, splices of reinforcement. Add to Section 6.1.7 as follows: 6.1.7 – Splices of reinforcement. Lap splices, welded splices or mechanical splices are permitted in accordance with the provisions of this section. Welding shall conform to AWS D1.4. Welded splices shall be of ASTM A706 steel reinforcement. Reinforcement larger than No. 9 (M 29) shall be spliced using mechanical connections in accordance with Section 6.1.7.2.

2107.4 Reserved.

2107.5 [OSHPD 1R, 2 & 5] TMS 402, Section 8.3.4.4 Walls.

2107.5 [OSHPD 1R, 2 & 5] TMS 402, Section 8.3.4.4 Walls. Modify TMS 402 by adding Section 8.3.4.4 as follows by adding: 8.3.4.4.1 The minimum thickness of walls is given in this section. Stresses shall be determined on the basis of the net thickness of the masonry, with consideration for reduction, such as raked joints. 8.3.4.4.2 The thickness of masonry walls shall be designed so that allowable maximum stresses specified in this chapter are not exceeded. Masonry walls shall not exceed the height or length-to-thickness ratio or the minimum thickness as specified in this chapter and as set…