Using the moment distribution method, evaluate the nodal moments at A, B, C and D of the propped portal frame of Fig. Q2. The relative values of the second moment of area are indicated on the diagram. Young's modulus is constant throughout. (ii) A horizontal prop force is applied at C to prevent sidesway. Evaluate the prop force (iii)Finally, evaluate and draw the BMD on the tension side of the members of the structure. A 3 m 10 I B Fig. Q2 12 kN/m 41 4 m 41 D 4 m