An investigation is performed on constituent plate element interaction effects of cold-formed stainless steel square and rectangular hollow sections in bending.
The design provisions on Class 3 and Class 2 slenderness limits and effective width formulae are assessed.
New Class 3 and Class 2 slenderness limits and the section moment capacity design equations are proposed based on the whole cross-section response, which carefully take into account of the interaction effects of constituent plate elements.