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Q4. The structure shown in Figure 4 is a three-pin frame. a. Determine the reactions at the supports A and B b. Sketch the bending moment diagram by calculating the

moments at the seven sections A, B,C, D, E, F and G(10 marks) c. Establish the location of the section that has the maximum bending moment and write down its value on the diagram(5 marks)

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5