A 9-m-long steel [E = 200 GPa] pipe column has an outside diameter of 220 mm and a wall thickness of 8 mm. The column is supported only at its ends and it may buckle in any direction. Calculate the critical load Per for the following end conditions: (a) pinned-pinned (b) fixed-free (c) fixed-pinned (d) fixed-fixed (e) determine the diameter of the circular solid steel rod column for the same critical load Match the answers and do not leave blanks. Hint: Calculate the cross section area and the moment of inertia of the cross section area. 162.5 1. pinned-pinned: Pcr = _ kN 2920 2. fixed-free: Pcr = ____ kN 2290 3. fixed-pinned: Pcr = _ kN 1491 4. fixed-fixed: Pcr = ___ kN 183 5. diameter of the circular solid steel column = ____ mm 157.2 6. Not an answer 731