Chapter 22 Steel

2201.1 Scope.

The provisions of this chapter govern the quality, design, fabrication and erection of steel construction.

2201.2 Identification.

Identification of steel members shall be in accordance with the applicable referenced standards within this chapter. Other steel furnished for structural load-carrying purposes shall be identified for conformity to the ordered grade in accordance with the specified ASTM standard or other specification and the provisions of this chapter. Where the steel grade is not readily identifiable from marking and test records, the steel shall be tested to verify conformity to such standards.

2201.3 Protection.

The protection of steel members shall be in accordance with the applicable referenced standards within this chapter.

2201.4 Connections.

The design and installation of steel connections shall be in accordance with the applicable referenced standards within this chapter. For special inspection of welding or installation of high-strength bolts, see Section 1705.2.

2201.5 Anchor rods.

Anchor rods shall be set in accordance with the approved construction documents. The protrusion of the threaded ends through the connected material shall fully engage the threads of the nuts, but shall not be greater than the length of the threaded portion of the bolts.

2202.1 General.

The design, fabrication and erection of structural steel elementsand composite structural steel and concrete elements in buildings, structures and portions thereof shall be in accordance with AISC 360.

2202.2 Seismic design.

Where required, the seismic design, fabrication and erection of buildings, structures and portions thereof shall be in accordance with Section 2202.2.1 or 2202.2.2, as applicable.

2203.1 General.

The design, manufacture and erection of austenitic and duplex structural stainless steel shall be in accordance with AISC 370.

2204.1 General.

The design of cold-formed carbon and low-alloy steel structural members not covered in Sections 2206 through 2209 shall be in accordance with AISI S100. The design of cold-formed steel diaphragms shall be in accordance with additional provisions of AISI S310 as applicable. Where required, the seismic design of cold-formed steel structures shall be in accordance with the additional provisions of Section 2204.2.

2204.2 Seismic design.

The design and detailing of cold-formed steel seismic force-resisting systems shall be in accordance with Sections 2204.2.1 and 2204.2.2, as applicable.

2205.1 General.

The design of cold-formed stainless steel structural members shall be in accordance with ASCE 8.

2206.1 Structural framing.

For cold-formed steel light-frame construction, the design and installation of the following structural framing systems, including their members and connections, shall be in accordance with AISI S240, and Sections 2206.1.1 through 2206.1.3, as applicable:

1. 1.

   Floor and roof systems.

2. 2.

   Structural walls.

3. 3.

   Shear walls, strap-braced walls and diaphragms that resist in-plane lateral loads.

4. 4.

   Trusses.

2206.2 Nonstructural members.

For cold-formed steel light-frame construction, the design and installation of nonstructural members and connections shall be in accordance with AISI S220.

2206.3 Cutting and notching.

The cutting and notching of holes in cold-formed steel framing members shall be in accordance with AISI S240 for structural members and AISI S220 for nonstructural members.

2207.1 General.

The design, manufacture and use of open-web steel joists and joist girders shall be in accordance with either SJI 100 or SJI 200, as applicable.

2207.2 Design.

The registered design professional shall indicate on the construction documents the steel joist and steel joist girder designations from SJI 100 or SJI 200; and shall indicate the requirements for joist and joist girder design, layout, end supports, anchorage, bridging design that differs from SJI 100 or SJI 200, bridging termination connections and bearing connection design to resist uplift and lateral loads. These documents shall indicate special requirements as follows:

1. 1.

   Special loads including:

   1. 1.1.

      Concentrated loads.

   2. 1.2.

      Nonuniform loads.

   3. 1.3.

      Net uplift loads.

   4. 1.4.

      Axial loads.

   5. 1.5.

      End moments.

   6. 1.6.

      Connection forces.

2. 2.

   Special considerations including:

   1. 2.1.

      Profiles for joist and joist girder configurations that differ from those defined by SJI 100 or SJI 200.

   2. 2.2.

      Oversized or other nonstandard web openings.

   3. 2.3.

      Extended ends.

3. 3.

   Deflection criteria for joists and joist girder configurations that differ from those defined by SJI 100 or SJI 200.

2207.3 Calculations.

The steel joist and joist girder manufacturer shall design the steel joists and steel joist girders in accordance with SJI 100 or SJI 200 to support the load requirements of Section 2207.2. The registered design professional shall be permitted to require submission of the steel joist and joist girder calculations as prepared by a registered design professional responsible for the product design. Where requested by the registered design professional, the steel joist manufacturer shall submit design calculations with a cover letter bearing the seal and signature of the joist manufacturer’s registered design professional. In addition to the design calculations submitted under seal and signature, the following shall be included:

1. 1.

   Bridging design that differs from SJI 100 or SJI 200, such as cantilevered conditions and net uplift.

2. 2.

   Connection design for:

   1. 2.1.

      Connections that differ from SJI 100 or SJI 200, such as flush-framed or framed connections.

   2. 2.2.

      Field splices.

   3. 2.3.

      Joist headers.

2207.4 Steel joist drawings.

Steel joist placement plans shall be provided to show the steel joist products as specified on the approved construction documents and are to be utilized for field installation in accordance with specific project requirements as stated in Section 2207.2. Steel joist placement plans shall include, at a minimum, the following:

1. 1.

   Listing of applicable loads as stated in Section 2207.2 and used in the design of the steel joists and joist girders as specified in the approved construction documents.

2. 2.

   Profiles for joist and joist girder configurations that differ from those defined by SJI 100 or SJI 200.

3. 3.

   Connection requirements for:

   1. 3.1.

      Joist supports.

   2. 3.2.

      Joist girder supports.

   3. 3.3.

      Field splices.

   4. 3.4.

      Bridging attachments.

4. 4.

   Deflection criteria for joists and joist girder configurations that differ from those defined by SJI 100 or SJI 200.

5. 5.

   Size, location and connections for bridging.

6. 6.

   Joist headers.

Steel joist placement plans do not require the seal and signature of the joist manufacturer’s registered design professional.

2207.5 Certification.

At completion of manufacture, the steel joist manufacturer shall submit a certificate of compliance to the owner or the owner’s authorized agent for submittal to the building official as specified in Section 1704.5 stating that work was performed in accordance with approved construction documents and with SJI 100 or SJI 200, as applicable.

2208.1 Steel decks.

The design and construction of cold-formed steel floor and roof decks and composite slabs of concrete and steel deck shall be in accordance with SDI SD. The design of cold-formed steel diaphragms shall be in accordance with additional provisions of AISI S310, as applicable.

2209.1 General.

The design, testing and utilization of steel storage racks made of cold-formed or hot-rolled steel structural members shall be in accordance with ANSI MH16.1. The design, testing and utilization of steel cantilevered storage racks made of cold-formed or hot-rolled steel structural members shall be in accordance with ANSI MH 16.3.

2209.2 Seismic design.

Where required by ASCE/SEI 7, the seismic design of steel storage racks and cantilevered steel storage racks shall be in accordance with Section 15.5.3 of ASCE/SEI 7.

2209.3 Certification.

For steel storage racks that are 8 feet (2438 mm) in height or greater to the top load level and assigned to Seismic Design Category D, E, or F at completion of the storage rack installation, a certificate of compliance shall be submitted to the owner or the owner’s authorized agent stating that the work was performed in accordance with approved construction documents.

2210.1 General.

The design, fabrication and erection of a metal building system shall be in accordance with the provisions of this section.

2211.1 General.

The design, testing and utilization of industrial boltless steel shelving shall be in accordance with MHI ANSI/MH 28.2. Where required by ASCE/SEI 7, the seismic design of industrial boltless steel shelving shall be in accordance with Chapter 15 of ASCE/SEI 7.

2212.1 General.

The design, testing and utilization of industrial steel work platforms shall be in accordance with MHI ANSI/MH 28.3. Where required by ASCE/SEI 7, the seismic design of industrial steel work platforms shall be in accordance with Chapter 15 of ASCE/SEI 7.

2213.1 General.

The design and installation of stairs, ladders and guarding serving steel storage racks and industrial steel work platforms used in material handling structures shall be in accordance with MHI ANSI/MH 32.1.

2214.1 General.

The design, fabrication and erection including related connections, and protective coatings of steel cables for buildings shall be in accordance with ASCE 19.