A column 12 m long is built up consisting of a W310 x 107 with 2 plates 12 mm thick welded as shown in Figure ST – 108 to form a boxsection. The column has both ends hinged. 1. Compute the effective slenderness ratio with respect to the x - axis. 2. Compute the effective slenderness ratio with respect to the y – axis. 3. What is the axial load capacity of the column?

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