An I-shape SHORT column is subjected to an eccentric compressive load P of 50 kN as shown in Figure Q3a. Find the maximum compressive and tensile stresses in the section. (12 marks) Another steel LONG column with circular hollow section and uniform thickness is subjected to a concentric axial load P. The column has a fixed support at A and free end at B as shown in Figure Q3b. The height of column is 4 m. The outer diameter (D) is 200 mm and the inner diameter (d) is 170 mm. The elastic modulus (E) of steel is 205 kN/mm and the yield stress (o,) is 355 N/mm. Given the effective length factor K is 2.0. Determine the allowable load that the column can support if the factor of safety (n) is taken to be 2.5 under compression. (13 marks) Vv 20mm 160 mm 20 mm WV 4 m x y 70 mm 10 mm 0 mm 40 mm + P= 50 kN d=170 mm O Y-Y B x Figure Q3a D = 200 mm Figura (th