WASHINGTON, D.C. — The American Iron and Steel Institute and CSA Standards have announced that Supplement No. 2 to AISI S100 (CSA S136), the North American Specification for the Design of Cold-Formed Steel Structural Members, 2007 Edition (S100-07/S2-10), has been published and is available free of charge on AISI’s website at www.steel.org and through CSA Standards at www.shopcsa.ca.

The new supplement includes all updates provided in Supplement No. 1 to the North American Specification for the Design of Cold-Formed Steel Structural Members, 2007 Edition. It also includes the following changes and updates:
•New design provisions offered in Section B2.5, Uniformly Compressed Elements Restrained by Intermittent Connections.
•Unified provisions in Section C2, Tension Members, which was moved from country-specific Appendices A and B to the main body of the Specification.
•Revised Sections D1.1, D1.2, D3 and D3.2 to clarify certain terminologies.
•A complete Chapter E, Connections and Joints, which includes:

  • Revised flare groove weld provisions,
  • The addition of interaction check of combined shear and tension of arc spot welds, and
  • Unified shear rupture checks.

•The modification of Section F1.1, Load and Resistance Factor Design and Limit States Design, to differentiate the composite interior partition wall studs from direct load-bearing systems.
•An expansion of the geometric and material limitations of pre-qualified columns and beams for using the Direct Strength Method.

“Supplement No. 2 is an important revision of the North American Specification for the Design of Cold-Formed Steel Structural Members, 2007 Edition,” Jay Larson, P.E., F.ASCE, managing director, AISI Construction Technical Program, said. “The timely completion of this document will make it available for adoption by the 2012 editions of the International Building Code.”

AISI S100-07 (CSA S136) has been adopted in the U.S. by the American National Standards Institute (ANSI) as an American National Standard; in Canada, approved by the Standards Council of Canada (SCC) as a National Standard of Canada; and endorsed by Camara Nacional de la Industria del Hierro y del Acero (CANACERO) in Mexico.

“The technical changes in Supplement No. 2 will greatly help the industry in advancing cold formed steel in the Canadian marketplace,” said Michael Mortimer, P-Eng, program manager, Built Environment, CSA Standards. “The Supplement includes essential information for structural designers to assist them in the design of more efficient and economical cold formed steel structures. “

AISI’s codes and standards work is conducted under the Construction Market Council of the Steel Market Development Institute (SMDI), a business unit of AISI. The SMDI oversees the industry’s investment in advancing the case for steel in the marketplace as the preferred material of choice.
 

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