QUESTION 3 (20 Points) Evaluate safe h and reinforcement ratio for the following columns assuming reinforcement is only on two sides and bar diameter of 29mm. Given f = 28 MPa and fy = 420 MPa. Use interaction diagrams available in the lecture notes. Hint, maximum reinforcement ratio in column is 4%. Use Column width of 400mm. 1- C1 subjected to Ultimate Axial load of 1000 kN and Ultimate moment of 400 kN.m. Use column width=300 mm. (10 Points) 2- C2 subjected to Ultimate Axial load of 1000 kN and Ultimate moment of 800 kN.m. Use column width = 300 mm. (10 Points)

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