Note: This is a printed publication only. If an electronic version of the standard is desired, a free download is available at http://www.aisistandards.org.
AISI S240-15, North American Standard for Cold-Formed Steel Structural Framing, 2015 Edition, applies to the design and installation of structural members and connections utilized in cold-formed steel light-frame construction applications, including floor and roof systems, structural walls, shear walls, strap braced walls and diaphragms to resist in-plane lateral loads, and trusses for load-carrying purposes. The standard is to be used in conjunction with AISI S100-12, North American Specification for the Design of Cold-Formed Steel Structural Members, 2012 Edition and is intended for adoption and use in the United States, Canada and Mexico.
AISI S240-15 integrates the following AISI standards into one document for easy reference, and thus supersedes all previous editions of these standards:
- AISI S200-12, North American Standard for Cold-Formed Steel Framing―General Provisions
- AISI S210-07 (2012), North American Standard for Cold-Formed Steel Framing―Floor and Roof System Design (Reaffirmed 2012)
- AISI S211-07 (2012), North American Standard for Cold-Formed Steel Framing―Wall Stud Design(Reaffirmed 2012)
- AISI S212-07 (2012), North American Standard for Cold-Formed Steel Framing―Header Design(Reaffirmed 2012)
- AISI S213-07 w/ S1-09 (2012), North American Standard for Cold-Formed Steel Framing―Lateral Design With Supplement 1(Reaffirmed 2012)
- AISI S214-12, North American Standard for Cold-Formed Steel Framing―Truss Design
Design provisions specific to seismic design are now included in AISI S400-15, North American Standard for Seismic Design of Cold-Formed Steel Structural Systems, 2015 Edition.
In this publication, modifications were made to align the provisions for AISI S240 with AISI S400, as follows:
- The applicability of AISI S240 for seismic design was limited to applications where specific seismic detailing is not required.
- Definitions no longer needed in AISI S240 were removed and remaining definitions were revised as needed for consistency with AISI S400.
- Seismic-specific tables for nominal shear strength (resistance) were deleted.
- Seismic-specific safety factors and resistance factors were deleted.
- Other seismic-specific requirements were removed (as appropriate) and remaining requirements were generalized for applicability to wind, seismic or other lateral loads.