Sustainable applications of cold-formed steel structures: portal frames

James B.P. Lim, Andrzej M. Wrzesien, David A. Nethercot

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

5 Citations (Scopus)


This chapter considers the analysis and design of cold-formed steel portal frames. A literature review of tests on cold-formed steel joints is first presented. The requirement in beam idealization for cold-formed steel portal frames to take into account both the semirigidity and the finite connection length is shown through comparisons against full-scale test results. In the case of joints formed through the web, a reduced strength as a result of the bimoment in the section is demonstrated. For practical small-sized frames, however, serviceability design is more important, to avoid tearing of the cladding at the gable end frames caused by load returned to the gables as a result of stressed skin. The effect of stressed-skin action for portal frames with small spans is shown. For such frames, a three-dimensional stressed-skin frame analysis should be used for design purposes. Finally, performance in fire conditions is described, suggesting the potential advantages of fire protection to the side rails.

Original languageEnglish
Title of host publicationRecent Trends in Cold-Formed Steel Construction
EditorsCheng Yu
PublisherWoodhead Publishing Limited
ISBN (Print)978-0-08-100160-8
Publication statusPublished - 2016
Externally publishedYes


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