American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

Alternative Title

AISI COS NASPEC_SUP04 Specification and Commentary


The material contained herein has been developed by a joint effort of the American Iron and Steel Institute Committee on Specifications, the Canadian Standards Association Technical Committee on Cold Formed Steel Structural Members (S136), and Camara Nacional de la Industria del Hierro y del Acero (CANACERO) in Mexico. The organizations and the Committees have made a diligent effort to present accurate, reliable, and useful information on cold-formed steel design. The Committees acknowledge and are grateful for the contributions of the numerous researchers, engineers, and others who have contributed to the body of knowledge on the subject. Specific references are included in the Supplement to the Commentary on the Specification.

With anticipated improvements in understanding of the behavior of cold-formed steel and the continuing development of new technology, this material may eventually become dated. It is anticipated that future editions of this specification will update this material as new information becomes available, but this cannot be guaranteed.

The materials set forth herein are for general information only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a registered professional engineer. Indeed, in most jurisdictions, such review is required by law. Anyone making use of the information set forth herein does so at their own risk and assumes any and all resulting liability arising therefrom.


Civil, Architectural and Environmental Engineering


American Iron and Steel Institute

Canadian Standards Association

Camara Nacional de la Industria del Hierro y del Acero (CANACERO)

Research Center/Lab(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures


American Iron and Steel Institute

Publication Date

01 Jan 2005

Document Version

Final Version


© 2005 American Iron and Steel Institute, All rights reserved.

Document Type

Technical Report

File Type