Chapter 22 — STEEL

(Matrix Adoption Tables are nonregulatory, intended only as an aid to the code user.

See Chapter 1 for state agency authority and building applications.)

Adopting agency	BSC	BSC- CG	SFM	HCD			DSA			OSHPD						BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
Adopting agency	BSC	BSC- CG	SFM	1	2	1/AC	AC	SS	SS/CC	1	1R	2	3	4	5	5	5	5	5	5	5	5	5
Adopt entire chapter	X			X	X								X
Adopt entire chapter as amended (amended sections listed below)									X		X	X			X
Adopt only those sections that are listed below
Chapter / Section
2201.1.1									X		X	X			X
2201.1.2									X		X	X			X
2201.1.3									X
2201.1.4									X		X	X			X
2204.1.1											X	X			X
2204.4											X	X			X
2205.1											X	X			X
2205.2.1.2											X	X			X
2205.3											X	X			X
2205.4											X	X			X
2206.2.1											X	X			X
2207.4											X	X			X
2207.6											X	X			X
2208.1											X	X			X
2210.1.1.2											X	X			X
2210.2											X	X			X
2211.1.1.2											X	X			X
2211.1.3											X	X			X
2211.2											X	X			X
2212									X
2213											X	X			X

The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.

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22-2 2022 CALIFORNIA BUILDING CODE

CHAPTER 22

STEEL

User notes:

About this chapter: Chapter 22 provides the minimum requirements for the design and construction of structural steel (including composite construction), cold-formed steel, steel joists, steel cable structures and steel storage racks. This chapter specifies appropriate design and construction standards for these types of structures. It also provides a road map of the applicable technical requirements for steel structures. Chapter 22 requires that the design and use of steel structures and components be in accordance with the applicable specifications and stan- dards of the American Institute of Steel Construction, the American Iron and Steel Institute, the Steel Joist Institute and the American Society of Civil Engineers.

Code development reminder: Code change proposals to this chapter will be considered by the IBC—Structural Code Development Commit- tee during the 2022 (Group B) Code Development Cycle.

2205A.4 Modifications to AISC 341. [OSHPD 1 and 4]¶

2205A.4.1 Glossary. Modify glossary by adding the fol- lowing:

Inelastic Rotation: The permanent or plastic portion of the rotation angle between a beam and the column, or between a link and the column of the test specimen, mea- sured in radians. The inelastic rotation shall be com- puted based upon an analysis of the test specimen deformations. Sources of inelastic rotation include yield- ing of members and connectors, yielding of connection elements and slip between members and connection ele- ments. For beam-to-column moment connections in spe- cial moment frames, the inelastic rotation is represented by the plastic chord rotation angle calculated as the plastic deflection of the beam or girder, at the center of its span divided by the distance between the center of the beam span and the centerline of the panel zone of the beam-column connection. For link-to-column connec- tions in eccentrically braced frames, inelastic rotation shall be computed based upon the assumption that inelastic action is concentrated at a single point located at the intersection of the centerline of the link with the face of the column.

2205A.4.2 Section A4. Replace Section A4.1 Item (c) as follows:

(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 con- struction, 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 construc- tion documents. [OSHPD 1 & 4] Primers or paints used to mark protected zones on steel surfaces, which are to receive sprayed fire-resistance material, shall comply with California Building Code Section 704.13.3.2. 2205A.4.3 Section I2. [OSHPD 1 & 4] Replace Section I2.1 Item (d) as follows:

(d) Decking attachments that penetrate the beam flange shall not be placed on beam flanges within the protected zone, except power-actuated fasteners up to 0.18 inch in diameter are permitted, provided that the penetration is less than 85 percent of beam flange thickness.

STEEL

2212A.2 Seismic requirements.¶

In addition to the other requirements of this code, the design, materials and work- manship of light modular steel moment frames shall comply with the requirements of this section. The response modifica- tion coefficient R shall be equal to 3 ¹ / 2 . Cd and Ω 0 shall be equal to 3.0.

2212A.2.1 Base materials. Beams, columns and connec- tion materials shall be limited to those materials permitted under the AISC Specification for Structural Members (ANSI/AISC 360) and the AISI North American Specifica- tion for the Design of Cold-Formed Steel Structural Mem- bers (AISI S100).

2212A.2.2 Beam-to-column strength ratio. At each moment-resisting connection the following shall apply:

SbiFybi

--------------------- - ≥ 1.4 ScjFycj

where:

(Equation 22A-1)