In this paper, we studied experimentally the strength of long steel channel columns with the plates that tied fl ange by testing axial compression. The results show that the tie plates are eff ective in preventing torsional-fl exural buckling. In addition, we propose that it is possible to gain effective slenderness ratio from elastic analysis and show that the relationship between this ratio and the experimental strength corresponded to the previous evaluation formula. Therefore, it is clear that the buckling strength of a lightweight steel channel column can be estimated from a simple elastic analysis.
