Thin walled cold-formed steel sections are widely used in the construction industry as primary structural and nonstructural components because of their light weight and high strength properties. SupaCee sections are new sections with
strengthened cross section than the traditional lipped channel section. This study investigated the distortional buckling
behaviour of cold formed SupaCee beams provided with various shapes of web perforations and also with crimped flanges. Web
openings are provided in the beam sections to allow access for building services like electric wires and pipelines. Past researches
have shown that the introduction of holes causes reduction of both buckling capacity and strength of the member. In this study,
the effect of web hole shapes in the distortional buckling of cold-formed SupaCee beams were analysed and the best perforated
SupaCee model was compared with the model without web openings. Crimps were introduced into the flanges of best perforated
model obtained for the strengthening
