Behavior of Cold-Formed Steel Built-Up I-Sections


An experimental investigation was conducted to study the behavior of built-up cold-formed steel studs and to assess the current design provisions of the North American Specification for the Design of Cold-Formed Steel Structural Members. Typical applications include framing for windows, doorways, shear walls, and multi-story cold-formed steel framed buildings in which the lower floor utilizes built-up studs to carry the load. the built-up studs in this study consisted of two C-sections oriented back-to-back forming an I-shaped cross-section. For each specimen, the studs were connected to each other with two self-drilling screws spaced at a set interval. a cold-formed steel track section was connected running perpendicular to each end of the built-up stud with a single self-drilling screw through each flange of the C-sections. the purpose of the track section was to keep the ends of the studs together and represents a common end attachment. as a result of the investigation, the current design requirements were found to be conservative in predicting the ultimate capacity of built-up studs.


Civil, Architectural and Environmental Engineering

Keywords and Phrases

Axial Compression; Built-Up Section; Cold-Formed Steel; Columns

Document Type

Article - Journal

Document Version


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