A 6061-T6 aluminum-alloy wide-flange shape, having the cross-sectional dimensions shown in Figure P16.72b, is used as a column of length L = 4.2 m. The column is fixed at base A. Pinconnected lateral...

A 6061-T6 aluminum-alloy wide-flange shape, having the cross-sectional dimensions shown in Figure P16.72b, is used as a column of length L = 4.2 m. The column is fixed at base A. Pinconnected lateral bracing is present at B so that deflection in the x–z plane is restrained at the upper end of the column; however, the column is free to deflect in the x–y plane at B (Figure P16.72a). Use the Aluminum Association column design formulas to determine the allowable compressive load Pallow that the column can support. In your analysis, consider the possibility that buckling could occur about either the strong axis (i.e., the z axis) or the weak axis (i.e., the y axis) of the aluminum column.