AISI Publishes Supplement No. 1 to S400-15, North American Standard for Seismic Design of Cold-Formed Steel Structural Systems

WASHINGTON, D.C., November 17, 2016 – The American Iron and Steel Institute (AISI) has published Supplement No. 1 to AISI S400-15, North American Standard for Seismic Design of Cold-Formed Steel Structural Systems, 2015 Edition. While the standard addresses the design and construction of cold-formed steel structural members and connections used in the seismic force-resisting systems in buildings and other structures, this particular supplement revises the expected strength factors for cold-formed steel light-frame shear walls sheathed with wood structural panels, steel sheet sheathing, gypsum board, and fiberboard panel sheathing.

The Supplement is available to download free of charge from It is available to download as: 1) a single document for users who are interested only in the specific changes, or as 2) part of the complete standard, designated as AISI S400-15 w/S1-16.

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, which oversees the industry’s investment in advancing the competitive use of steel by meeting the demands of the marketplace. For more information on SMDI’s Construction Market program, visit or Follow SMDI on Facebook or Twitter (@BuildUsingSteel).

AISI serves as the voice of the North American steel industry in the public policy arena and advances the case for steel in the marketplace as the preferred material of choice. AISI also plays a lead role in the development and application of new steels and steelmaking technology. AISI is comprised of 19 member companies, including integrated and electric furnace steelmakers, and approximately 125 associate members who are suppliers to or customers of the steel industry. For more news about steel and its applications, view AISI’s website at Follow AISI on Facebook or Twitter (@AISISteel).

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

Lisa Harrison
Senior Vice President, Communications
American Iron and Steel Institute
Tel: 202.452.7115