Chapters 22 and 22A Steel

California Amendments by DSA and OSHPD

Chapter 22 – Steel

Office of Statewide Hospital Planning and Development

2201.5.1 Shear transfer at column base plate [OSHPD 1R, 2 & 5]

Added a pointer to new shear lugs design provisions in ACI 318 Section 17.11 regarding anchor rods.

2202.2.2 Structural steel elements

Amended and added OSHPD banner to Item 2 to clarify that structural steel elements in seismic force resisting systems that are consistent with Seismic Design Category D, E or F in Section 2202.2.1.2 shall satisfy the requirements in AISC 341.

2202.4 [formerly 2205.4] [OSHPD 1R, 2 & 5]
2202.4.1 Modifications to AISC 358 Chapter 10

Modified the allowance to use steel and concrete ConXtech ConXL composite special moment frame. Repealed former Section 2205.4.1 2.1 Special and Intermediate Moment Frame Connection Types, Table 2-1 Prequalified Moment Connections modifications. All moment connections in AISC 358 are based on new tests since the Northridge earthquake. Welded and bolted moment connections are permitted with limited modifications.

2202.4.2 Modifications to AISC 358 Chapter 11 Welded Moment Connection,
2202.4.3 Modifications to AISC 358 Chapter 11 Bolted Moment Connection

Relocated and amended existing amendments to codify exceptions allowing the current practice of adjusting gap-to-side plate thickness ratio.

2202.4.4 Modifications to AISC 358 Chapter 12

Codified existing limitations for Simpson Strong-Tie (SST) Yield-Link Moment Connection in OSHPD Preapproved Prefabricated Components and Systems (PCS -0002). Reference to AISC 341 Table D1.1 is intended to provide ductility consistent with AISC 341 requirements for moment frame beams with significant axial load.

2202.4.5 Modifications to AISC 358 Chapter 15

Codified existing limitations for DuraFuse Frames (DFF) Moment Connection in OSHPD Preapproved Prefabricated Components and Systems (PCS -0004) Reference to AISC 341 Table D1.1 is intended to provide ductility consistent with AISC 341 requirements for moment frame beams with significant axial load.

Section 2203 Structural stainless steel (formerly Section 2203 Protection of steel for structural purposes)

Renamed model code section. No California amendments made to model code language.

2204.1 General

Repealed amendment regarding the modification requirements to AISI S100 Chapter J Connections and Joints, Section J7.2, as this section no longer exists in AISI S100.

2204.2 Seismic design (formerly Section 2210.2 Seismic requirements for cold-formed steel structures)

Relocated existing amendment from Section 2210.2 regarding cold-formed special bolted moment connection prohibited by Section 1617A.1.2 (referenced by Section 1601.15).

2204.2.1 CFS special bolted moment frames

Deleted model code section because Section 1617A.1.4 states that cold-formed steel bolted moment frames are prohibited, therefore the AISI standards do not apply.

2204.2.2 Cold-formed steel seismic force-resisting systems

Deleted model code section because California is assigned to Seismic Design Categories D, E, or F in accordance with 1613A.2, therefore requirements for systems in Seismic Design Categories A, B, or C do not apply.

Division of the State Architect

2215 Additional requirements for community colleges [DSA-SS/CC]
2215.1.1 (formerly 2212.1.1) Shear transfer at column

Added pointer to new shear lugs design provisions in ACI 318 Section 17.11 to promote code compliance.

Chapter 22A – Steel

Division of the State Architect

2201A.2 Identification

Added DSA-SS banner and amended to clarify that all material identification and testing shall be in accordance with Chapter 17A.

2202A.6 Modifications to AISC 358. [DSA-SS]
2202A.6.1 Modifications to AISC 358 Chapter 10

Added new section and DSA banner to incorporate modifications to AISC 358 regarding Steel and concrete ConXtech ConXL composite special moment frame connections.

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

2201A.5.1 (formerly 2204A.4) Shear transfer at column

Added pointer to new shear lugs design provisions in ACI 318 Section 17.11 to promote code compliance.

2202A.2.1 Structural steel seismic force-resisting systems and composite structural steel and concrete seismic force-resisting systems

Relocated existing exceptions from Section 2205A.1 to align with reorganized Chapter 22A.

2202A.2.2 Structural steel elements

Deleted reference to Seismic Design Categories B and C in accordance with Section 1613A.2. Aligned requirements with existing amendment in Section 2205A.2.1.2 requiring all lateral force resisting systems, including those listed in ASCE 7 Table 15.4-1, to be designed in accordance with AISC 341.

2202A.5.1 Section B5

Relocated existing amendment from 2205A.3.1. Reorganized code language and clarified as a modified exception to Section B5.2(a).

2203A Structural stainless steel (formerly Section 2203A Protection of steel for structural purposes)

Renamed model code section. No California amendments made to model code language.

Office of Statewide Hospital Planning and Development

2202A.3 (formerly 2205A.4) Modifications to AISC 341

Deleted existing Section 2205A.4.1. Deleted definition of inelastic rotation in the glossary section since it is no longer used in the code.

Deleted existing Sections 2205A.4.4, 2205A.4.5, 2205A.4.6, 2205A.4.7, 2205A.4.8, 2205A.4.9 and 2205A.4.10. Significant testing has been done to validate new ductility requirements in AISC 341, so these amendments are no longer necessary.

2202A.4 (formerly 2205A.5) Modifications to AISC 358

Deleted existing Section 2205A.5.1. Repealed prohibition on the use of bolted moment connections since many of these connections are already preapproved through our OSHPD Preapproved Prefabricated Components and Systems (PCS) program.

2202A.4.2 Modifications to AISC 358 Chapter 11 Welded Moment Connection,
2202A.4.3 Modifications to AISC 358 Chapter 11 Bolted Moment Connection

Relocated and amended existing amendments to codify exceptions allowing the current practice of adjusting gap-to-side plate thickness ratio.

2202A.4.4 Modifications to AISC 358 Chapter 12

Codified existing limitations for Simpson Strong-Tie (SST) Yield-Link Moment Connection in OSHPD Preapproved Prefabricated Components and Systems (PCS -0002). Reference to AISC 341 Table D1.1 is intended to provide ductility consistent with AISC 341 requirements for moment frame beams with significant axial load.

2202A.4.5 Modifications to AISC 358 Chapter 15

Codified existing limitations for DuraFuse Frames (DFF) Moment Connection in OSHPD Preapproved Prefabricated Components and Systems (PCS -0004). Reference to AISC 341 Table D1.1 is intended to provide ductility consistent with AISC 341 requirements for moment frame beams with significant axial load.

2204A (formerly 2210A) Cold Formed Steel
2204A.1 General

Repealed amendment regarding the modification requirements to AISI S100 Chapter J Connections and Joints, Section J7.2, as this section no longer exists in AISI S100.

2204A.2 Seismic design (formerly Section 2210A.2 Seismic requirements for cold-formed steel structures)

This section is not adopted because the two following subsections are not adopted.

2204A.2.1 CFS special bolted moment frames

Deleted model code section because Section 1617A.1.4 states that cold-formed steel bolted moment frames are prohibited, therefore the AISI standards do not apply.

2204A.2.2 Cold-formed steel seismic force-resisting systems

Deleted model code section because California is assigned to Seismic Design Categories D, E, or F in accordance with 1613A.2, therefore requirements for systems in Seismic Design Categories A, B, or C do not apply.