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Nd Calculate the ultimate moment strength(Mr) for the column given below (30 points) Mre ? kNm х As2 h fek[MPa) Concrete Characteristic Compressive Strength ty/MPa) Reinforcement Steel Characteristic Yield Strength yr Concrete Mean Safety Factor yms Reinforcing Steel Mean Safety Factor bw/mm) Width hmm) Height d'(mm) Cover Concrete Thickness Steel At Bottom Part of the Cross-section As 2 Steel At Upper Part of the Cross-section Nd Design Axial Loud As1 Asi bw fok[MPa) (MPa) 30 420 ym 15 yms 1.15 bw(mm) (mm) 275 550 d' (mm) 25 As1 3614 Nd As2 3614 350