The aluminum column shown in Figure P16.70/71 has a rectangular cross section and supports a compressive axial load P. The base of the column is fixed. The support at the top allows rotation of the...

The aluminum column shown in Figure P16.70/71 has a rectangular cross section and supports a compressive axial load P. The base of the column is fixed. The support at the top allows rotation of the column in the x–y plane (i.e., bending about the strong axis), but prevents rotation in the x–z plane (i.e., bending about the weak axis). Determine the allowable axial load P_allow
that may be applied to the column for the following parameters: L = 1,800 mm, b = 30 mm, and h = 40 mm. Use the Aluminum Association column design formulas.