AISI S240-15 - North American Standard for Cold-Formed Steel Structural Framing - 2015 Edition

Oct 24, 2026

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AISI S240-15 presents the North American standard for cold-formed steel structural framing, developed by the American Iron and Steel Institute committee for prescriptive and engineered design needs. It explains how the standard supports adoption in the United States, Canada, and Mexico, and integrates multiple earlier AISI framing standards into one document. The preface also details harmonization with seismic provisions in AISI S400 and notes revisions such as removal of seismic-specific factors and addition of Chapter F on testing.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages204

Reading Time8 h 34 min

AccessFree to download

Preface

Development purpose and scope

Integration of prior AISI standards

Alignment with AISI S400 seismic design

Additions and structural updates

AISI S240-15 AISI STA N DA R D North American Standard for Cold-Formed Steel Structural Framing 2015 Edition AISI S240-15 AISI STA N DA R D North American Standard for Cold-Formed Steel Structural Framing 2015 Edition DISCLAIMER The material contained herein has been developed by the American Iron and Steel Institute (AISI) Committee on Framing Standards. The Committee has made a diligent effort to present accurate, reliable, and useful information on cold-formed steel framing design and installation. The Committee acknowledges and is 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 Commentary. With anticipated improvements in understanding of the behavior of cold-formed steel framing and the continuing development of new technology, this material will become dated. It is anticipated that AISI will publish updates of this material as new information becomes available, but this cannot be guaranteed. The materials set forth herein are for general purposes only. They are not a substitute for competent professional advice. Application of this information to a specific project should be reviewed by a design professional. Indeed, in many jurisdictions, such review is required bylaw. Anyone making use of the information set forth herein does so at their own risk and assumes any and all liability arising therefrom. 1st Printing – December 2015 Copyright American Iron and Steel Institute 2015 This document is copyrighted by AISI. Any redistribution is prohibited. This first edition of AISI S240, North American Standard for Cold-Formed Steel Structural Framing, is dedicated to John P. Matsen, P.E. John was a widely respected structural engineer for over three decades and founder and principal of Matsen Ford Design Associates. Throughout his career, he helped pioneer and expand the use of cold-formed steel framing in structural and nonstructural applications. From the inception of the AISI Committee on Framing Standards in 1998, John was an active member. He served as chair of its High Wind Subcommittee from 1998 to 2001, enabling the AISI Standard for Cold-Formed Steel Framing—Prescriptive Method for One- and Two-Family Dwellings to be expanded in scope to address high wind areas. He actively engaged in the Committee’s numerous subcommittees and task groups, and was always an effective contributor. John was also an active member of the Cold-Formed Steel Engineers Institute, helping to author and review technical notes, providing webinars, serving as a member of the Executive Committee, and leading as Chair of the Institute from 2009 to 2010. John was always willing to offer his expertise to help advance the profession. The cold-formed steel industry gratefully acknowledges his many enduring contributions. This document is copyrighted by AISI. Any redistribution is prohibited. This Page is Intentionally Left Blank. This document is copyrighted by AISI. Any redistribution is prohibited. PREFACE The American Iron and Steel Institute (AISI) Committee on Framing Standards has developed AISI S240, North American Standard for Cold-Formed Steel Structural Framing, to address requirements for construction with cold-formed steel structural framing that are common to prescriptive and engineered design. This Standard is intended for adoption and use in the United States, Canada and Mexico. This Standard integrated the following AISI Standards into one document: 􀂃 AISI S200-12, North American Standard for Cold-Formed Steel Framing-General Provisions 􀂃 AISI S210-07 (2012), North American Standard for Cold-Formed Steel Framing–Floor and Roof System Design (Reaffirmed 2012) 􀂃 AISI S211-07(2012), North American Standard for Cold-Formed Steel Framing–Wall Stud Design (Reaffirmed 2012) 􀂃 AISI S212-07(2012), North American Standard for Cold-Formed Steel Framing–Header

FAQs

What is AISI S240-15 intended to cover?

AISI S240-15 addresses requirements for construction with cold-formed steel structural framing that are common to both prescriptive and engineered design approaches.

Which regions are targeted for adoption and use?

The standard is intended for adoption and use in the United States, Canada, and Mexico.

How does this edition relate to AISI S400 for seismic design?

In this edition, AISI S240 seismic applicability is limited to cases where specific seismic detailing is not required, and seismic-specific definitions, tables, and factors were removed while remaining requirements were generalized for wind, seismic, or other lateral loads.

Oct 24, 2026

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