N.Y.C. Admin. Code § BC 2205: Section BC 2205: Structural Steel

2205.1 General.

The design, fabrication and erection of structural steel elements in buildings, including materials used for such elements, shall be in accordance with AISC 360.

2205.1.1 Structural steel.

Material for use as structural steel not listed in AISC 360 may be used in accordance with AISC 360 when approved by the commissioner for such use. Refer to Section 28-113.2.2 of the Administrative Code for provisions relating to approval of alternative materials.

2205.2 Seismic design and detailing.

Where required, a building's seismic design, detailing, material, fabrication and erection shall be in accordance with Section 2205.2.1 or 2205.2.2, as applicable.

2205.2.1 Structural steel seismic force-resisting systems.

The design, detailing, fabrication and erection of structural steel seismic force-resisting systems, and the material used for such systems, shall be in accordance with the provisions of Section 2205.2.1.1 or 2205.2.1.2, as applicable.

2205.2.1.1 Seismic Design Category B or C.

Structures assigned to Seismic Design Category B or C shall be of any construction permitted in Section 2205. Where a response modification coefficient, R, in accordance with Table 1613.5, is used for the design of structures assigned to Seismic Design Category B or C, the structures shall be designed and detailed in accordance with the requirements of AISC 341.

Exception: The response modification coefficient, R, designated for "Steel systems not specifically detailed for seismic resistance, excluding cantilever column systems" in Table 1613.5, shall be permitted for systems designed and detailed in accordance with AISC 360, and need not be designed and detailed in accordance with AISC 341.

2205.2.1.2 Seismic Design Category D.

Structures assigned to Seismic Design Category D shall be designed and detailed in accordance with AISC 341, except as specified in Table 1613.5.

2205.2.2 Structural steel elements.

The design, detailing, fabrication and erection of structural steel elements in seismic force-resisting systems other than those covered in Section 2205.2.1, including struts, collectors, chords and foundation elements, shall be in accordance with AISC 341 where either of the following applies:

1. The structure is assigned to Seismic Design Category D except as specified in Table 1613.5.

2. A response modification coefficient, R, greater than 3 in accordance with Table 1613.5, is used for the design of the structure assigned to Seismic Design Category B or C.

2205.3 Fabrication, erection and quality control.

In addition to the provisions for fabrication, erection and quality control in AISC 360, the following provisions shall be used.

2205.3.1 Shop drawings.

Shop drawings shall include the location of oversized, short slotted and long slotted holes, and shall comply with AISC 303.

2205.3.2 Field connections.

Field connections shall meet the requirements for corresponding types of shop connections described in AISC 360. No holes, copes or cuts of any type, or alterations to anchor rods, shall be made to facilitate erection unless specifically shown on the shop or erection drawings or authorized in writing by the registered design professional of record for the structural design.

2205.3.3 Structural steel erection.

The requirements of Section 3305.2 shall apply.