CCFSS Library (1939 - present)


INTRODUCTION General Background Cold-Formed Steel Construction constitutes today an industry of significant importance. Its products supplement the usual hot-rolled steel structural members and can be divided into two broad categories: a) structural sections whose main purpose is to carry loads, and b) panels and decks which in addition should provide useful surfaces or serve other functions. Cold-formed steel structural members are made of hot rolled or cold reduced sheet or strip steel by any of the cold-forming methods described below. Thicknesses range in general from No. 28 Gage (0.0149 in.) to No. 10 Gage (0.1345 in.) but some formed shapes are made of thicker materials. The process of cold-forming generally increases the yield and ultimate strengths of the material, especially at corners and bends where large plastic strains are produced. This resuIts in members which have non-uniform material properties throughout the cross-section and with an average yield strength larger than that of the original strip. Extensive research has been carried out on the behavior of such members and most of the findings have been used in the Light Gage Cold-Formed Steel Design Manual of the American Iron and Steel Institute (8). More recently, especial attention has been given to the effects of cold-forming on the properties of the material and the way in which they affect the behavior of structural members (References 1 to 6, 9 and 13), since quantitative information on these topics will permit a more rational and economical design. The investigation presented here is a continuation of the above studies and deals with aspects not covered by the earlier investigators.


Civil, Architectural and Environmental Engineering


American Iron and Steel Institute

Research Center/Lab(s)

Wei-Wen Yu Center for Cold-Formed Steel Structures

Publication Date

01 May 1969

Document Version

Final Version

Document Type

Technical Report

File Type




Technical Report Number

Report No. 333