Determine the minimum critical Euler axial compression force, Pcr and the minimum critical Euler axial compression stress, cru, for the column below which is pinned at the top and bottom ends and braced as shown below. Use the following properties....
A = 12 in 2
l _{xx }= 300 in 4
I _{ri } = 50 in4
L = 20 ft
E = 29,000 ksi