Torsion and Computed Ultimate Loads of H-Columns

Ultimate moment capacities of H-columns with or without flexural end restraints have been computed by two methods–one including the effects of torsion and warping, the other ignoring them. Comparisons are made for both the ultimate moments and for deflections and failure modes. Some cases are indentified where torsional effects appear to have only a small influence on the moment capacity or failure mode. These include: the relatively short columns (weak axis slenderness ratio up to about 45) with no end restraints, and the longer columns (weak axis slenderness ratio up to about 75) with only minor axis flexural restraints. In some other cases, serious errors can result if torsional effects are ignored.