Section 2202A — STRUCTURAL STEEL AND COMPOSITE STRUCTURAL STEEL AND CONCRETE
2025 California Building Code (Title 24, Part 2) · 2025 edition · ingested 2026-07-07 · California
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2202 A .1 General. The design, fabrication and erection of structural steel elements and composite structural steel and concrete elements in buildings, structures and portions thereof shall be in accordance with AISC 360. Exceptions : [OSHPD 1 & 4] on Jul 18, 2025 11:14 AM (CDT) THEREUNDER. � � STEEL 1. For members designed based on tension, the slenderness ratio (L/r) shall not exceed 300, except for the design of hangers and bracing in accordance with NFPA 13 and for rod hangers in tension. 2. For members designed based on compression, the slenderness ratio (KL/r) shall not exceed 200,…
2202A.3 Modifications to AISC 341. [OSHPD 1 and 4] ¶
2202A.3 Modifications to AISC 341. [OSHPD 1 and 4] 2202A.3.1 Section A4. Modify Section A4.1 Item (c) by adding the following: (c) Locations and dimensions of protected zones. The fabricator shall permanently mark protected zones of structural elements in the seismic force-resisting system in the building that are designated on the construction documents. If these markings are obscured during construction, such as after the application of fire protection, the owner’s designated representative shall re-mark the protected zones as they are designated on the construction documents. [OSHPD 1 & 4]…
2202A.4 Modifications to AISC 358. [OSHPD 1 and 4] ¶
2202A.4 Modifications to AISC 358. [OSHPD 1 and 4] 2202A.4.1 Modifications to AISC 358 Chapter 10. [OSHPD 1 and 4] Steel and concrete ConXtech ConXL composite special moment frame connections shall be permitted, provided: 1. Beams are provided with reduced beam sections (RBS); 2. Web extension to beam web two-sided fillet welds are sized to develop expected strength of the beam web and shall not be less than a [1] / 4 inch fillet weld; and 3. The built-up box column wall thickness shall not be less than 1.25 inches and the HSS column wall thickness shall not be less than [1] / 2 inch.…
2202A.5 Modifications to AISC 341. [DSA-SS] ¶
2202A.5 Modifications to AISC 341. [DSA-SS] 2202A.5.1 Section B5. Modify exception of Section B5.2(a) as follows: Exception: The forces specified in this section need not be applied to truss diaphragms designed as a part of a three-dimensional system in which the seismic force-resisting system types consist of ordinary moment frames, ordinary concentrically braced frames, ordinary cantilever column systems, special cantilever column systems, or combinations thereof, and where each diagonal bracing member resists no more than 30 percent of the diaphragm shear at each line of resistance and…
2202A.6 Modifications to AISC 358. [DSA-SS] ¶
2202A.6 Modifications to AISC 358. [DSA-SS] 2202A.6.1 Modifications to AISC 358 Chapter 10. [DSA-SS] Steel and concrete ConXtech ConXL composite special moment frame connections shall be permitted, provided: 1. Beams are provided with reduced beam sections (RBS); 2. Web extension to beam web two-sided fillet welds are sized to develop expected strength of the beam web and shall not be less than a [1] / 4 inch fillet weld; and 3. The built-up box column wall thickness shall not be less than 1.25 inches and the HSS column wall thickness shall not be less than [1] / 2 inch.