Cold-Formed Steel Classroom: Flexural Member Design

Earn 1 PDH / 1 LU|HSW

The session will focus on the following key areas:

Design for cold-formed steel framing considers the behavior of flexural members. But such design is complex and involves consideration of the following limit states: bending, shear, web crippling as well as the combinations of these limit states. Complicating the design is the influence of the web punchouts.

The AISI S100 design equations are mathematical models to enable estimation of a limit state. This presentation will review the limit states with a focus on understanding the behavior that is the underlying focus for the AISI S100, North American Specification for the Design of Cold-Formed Steel Structural Members and AISI S240, North American Standard for Cold-Formed Steel Structural Framing design equations.

Reinhold Schuster, Ph.D., P.Eng.
University of Waterloo

Dr. Schuster’s contributions as an educator, researcher and specification contributor are unparalleled.

As an educator, Reini created and taught a graduate cold-formed course at the University of Waterloo. But Reini’s lecturing transcends the university classroom. He co-developed the AISI one-day cold-formed steel course for practitioners. He and Roger LaBoube presented that course continuously in the United States from 1996 to 2013 under the auspices of AISI, LGSEA and ASCE. Reini also teamed with Dr. Steve Fox and offered the one-day course in Canada under the auspices of the CSSBI. In 2023 Reini and Roger co-developed for CFSEI the update to the AISI one-day course which will be offered as an on-demand course on the CFSEI website. Reini’s passion and commitment to education of the cold-formed steel community is unmatched.

Reini’s research and creative interests lie in the area of cold-formed steel structures. He supervised a research team that engaged in both experimental and analytical studies. These research efforts developed solutions that have been adopted by AISI and Canadian standards and used by structural engineers engaged in the design of cold-formed steel structures.

Since 1978 Reini has served as the chair of the CSA S136 committee. This is the committee that writes the Canadian cold-formed steel design standard. During this same time Reini has been extensively involved in the AISI Committee on Specifications. Because of Reini’s involvement in both committees, the two countries' design specifications remained in sync. In fact, his efforts led to the creation of the North American Specification. He served as the chair of the AISI North American Specification Subcommittee which was charged with harmonizing the design standards across the continent.

Roger LaBoube, Ph.D., P.E.
Cold-Formed Steel Engineers Institute

Dr. Roger A. LaBoube is Curator’s Distinguished Teaching Professor Emeritus of Civil, Architectural and Environmental Engineering and former director of the Wei-Wen Yu Center for Cold-Formed Steel Structures at the Missouri University of Science & Technology. Dr. LaBoube holds B.S., M.S., and Ph.D. degrees in Civil Engineering from the University of Missouri-Rolla. He has an extensive background in the design and behavior of cold-formed steel structures. His research and design activities have touched on many facets of cold-formed steel construction, including cold-formed steel beams, panels, trusses, headers, and wall studs as well as bolt, weld, and screw connections. Dr. LaBoube is active in several professional organizations and societies. He served as chairman of the American Iron and Steel Institute (AISI) Committee on Framing Standards and is an emeritus member of the AISI Committee on Specifications for the Design of Cold-Formed Steel Structural Members. He is a registered professional engineer in Missouri.

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