Unified formulation for web crippling strength of cold-formed steel sheeting using stepwise regression

This study presents the availability of a stepwise regression (SR) method for the unified formulation of web crippling strength of cold-formed steel decks for various loading cases. Existing design codes offer different formulations for each loading case. However, the objective of this study is to provide an alternative unified (single) formulation to related design codes which can be used for all loading cases at the same time and should be more accurate than the separate formulations of existing design codes. The unified stepwise regression formulation is based on well established experimental results from the literature. The proposed unified SR formulation results are compared with experimental results and current design codes and found to be more accurate.