AISI Publishes Supplement No.1 to AISI S100, The North American Specification

WASHINGTON, D.C., Jan. 27, 2010   – The American Iron and Steel Institute (AISI) announced today that Supplement No. 1 to AISI S100, the North American Specification for the Design of Cold-Formed Steel Structural Members, 2007 Edition has been published and is available free of charge on AISI’s Web site at  

The Supplement adds the provision for determining the safety and resistance factor for partition walls, and updates the reference to Supplement No. 1 of AISI S123, the North American Cold-Formed Steel Framing Standard-Lateral. The North American Specification harmonizes cold-formed steel design technology among the United States, Canada and Mexico, allowing faster introduction of new technologies and opening up the marketplace for a wide variety of derivative products such as design aids and educational materials.

The Supplement was developed by a joint effort of AISI’s Committee on Specifications, the Canadian Standards Association (CSA) Technical Committee on Cold-Formed Steel Structural Members, and Mexico’s Camara Nacional de la Industria del Hierro y del Acero (CANACERO).

“Supplement No. 1 provides a timely update to the North American Specification. It should be of special interest to those involved with cold-formed steel framing design,” said Jay Larson, P.E., F. ASCE, Managing Director, Construction Technical Program. He noted that the Committee on Specifications is currently developing Supplement No. 2, which is expected to be available in late 2010. Supplement No. 2 will be submitted for adoption in the building code.

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. AISI serves as the voice of the North American steel industry in the public policy arena and plays a lead role in the development and application of new steels and steelmaking technology. AISI is comprised of 24 member companies, including integrated and electric furnace steelmakers, and 138 associate and affiliate members who are suppliers to or customers of the steel industry. AISI’s member companies represent approximately 75 percent of both U.S. and North American steel capacity. For more information, visit

Debbie Bennett
Manager, Communications
Construction Market
Steel Market Development Institute
Tel: 202.452.7179