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Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing
In recent years, with the introduction of higher strength grades, cold-formed steel sections have become increasingly more slender. As a result, top-hat purlin sections have become an alternative to conventional zed purlins, particularly when smaller purlin spans (around 4 m) are required. Such top-hat sections are torsionally stiffer than zed purlins, and have greater resistance against lateral-torsional buckling. Furthermore, they do not require anti-sag rods. However, when determining theirdoi:10.4203/ccp.102.15 fatcat:ihnwy7u2xvgz3nmkyfg7ox4eze