Web crippling capacity of fastened cold-formed steel channels with edge-stiffened web holes, un-stiffened web holes and plain webs under two-flange loading

Cold-formed steel (CFS) channels with edge-stiffened web holes are widely used as flooring joists and bearers in industrial buildings their flanges fastened most cases. This prevents the rotation of increases crippling capacity. In literature, no information is available on capacity such CFS holes. study presents results 36 new tests which were conducted under support subjected to two-flange loading. For comparison, specimens hole un-stiffened also tested. Finite element (FE) models then developed validated against experimental results. Using FE models, an extensive parametric involving 912 was conducted. study, thickness, size holes, length bearing plate edge-stiffener varied. Test indicated that have higher ultimate than those unfastened flanges. case flanges, increased by 71% 33% for end-two-flange (ETF) interior-two-flange (ITF) loading, respectively. Finally, test compared design strengths predicted proposed equations Uzzaman et al. (2020) current standards (American Iron Steel Institute (AISI) (2016), Australian New Zealand Standards (AS/NZS) (2018), European Standard (EC3) (2006)) plain channels. Upon it found reduction factor Uzzaman’s gave close predictions