Situation 5. A tied column 450 mm square is reinforced with 8-28 mm diameter equally distributed on its sides. The unsupported length of the column is 2.6 m and is prevented against sidesway by shear walls. Use 40 mm clear covering to the tie reinforcement with diameter 12 mm, f'c = 20.7 MPa, fy = 415 MPa, and E, = 200 GPa. Neglect the area of the concrete displaced by the steel. 11. a. b. a. b. Determine the nominal load of the column for a steel strain of 0.0045 1377.2 KN 523.90 KN C. d. 1543.6 kN 690.27 kN Determine the location of the plastic centroid of the section from the tension face of the column. 225 mm C. 153.6 mm d. 250 mm 296.4 mm