The paper presents fundamental information about realized experimental research of the local stability and load-carrying capacity of thin-walled compressed steel members with hybrid cross-sections. The load-carrying capacity of such members is influenced by the local web buckling subjected in the elastic-plastic region. The research joins on previous research of the first author. The aim of this research has been oriented on the elastic-plastic post-critical behavior of thin web and its interaction with compact flanges. Some experimental results and their comparisons are presented in the paper, too.
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