11/22/2013 1:08:00 AM
New Spec for Cold-Formed Steel Structural Design

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The American Iron and Steel Institute (AISI), in cooperation with CSA Group, published the new edition of the North American Specification for the Design of Cold-Formed Steel Structural Members. This latest edition provides updated information from recent advances in research on cold-formed steel design. 

The North American Specification harmonizes cold-formed steel design technology across the U.S., Canada and Mexico, allowing for faster introduction of new technologies. The Specification includes a main document—Chapters A through G and Appendices 1 and 2—that is intended for use by all three countries.

There are two country-specific appendices: Appendix A is for use in the United States and Mexico, and Appendix B is for use in Canada. The Specification provides an integrated treatment of Allowable Strength Design (ASD), Load and Resistance Factor Design (LRFD), and Limit States Design (LSD).

Reflecting ongoing research to develop new and improved information on the structural behavior of cold-formed steel members, the new edition includes the following additions and revisions:

New design provisions for power-actuated fasteners widely used in building construction.
Addition of material standard ASTM A1063.
Unification of country-specific provisions on tension member design, which have been moved to the main body of the Specification.
New provisions on combined shear and tension on arc spot welds and top arc seam sidelap welds.
Provisions for determining the web shear strength using the Direct Strength Method, which is an alternative approach for determining the strength and stiffness of cold-formed steel beams and members.

 

The North American Specification is the result of a cooperative effort by AISI’s Committee on Specifications for the Design of Cold-Formed Steel Structural Members and the CSA Group Technical Committee on Cold Formed Steel Structural Members.

The new edition is designated as AISI S100-12 in the U.S. and is available for purchase at steel.org. 

In Canada, this edition is designated as CSA S136-12 and is available for purchase at shop.csa.ca. 

It has been approved in the U.S. by the American National Standards Institute (ANSI) as the American National Standard, developed in Canada by CSA Group, and endorsed in Mexico by Camara Nacional de la Industria del Hierro y del Acero (CANACERO).