Fig. Q2 shows a simply supported primary steel beam 15- m long ABCD designed to support three-point loads P1, P2 and P3 imposed from secondary beams at B, C and E respectively. The steel beam is laterally restrained at A, B, C and D. Given the design shear force and bending moment diagrams as shown below, check the adequacy of 533x210x82 UB (Grade 275) against moment, shear capacity and lateral torsional buckling instability for the beam interior SPAN ABCD only. Ignore the small self-weight of steel beam in the calculations. (25 marks) +70 4 m B A B P P2 AD 5 m 4 m 2 m +35 +10 D -100 Design Shear Force Diagram (Unit - kN) P E 70 A B C E D 280 330 Design Bending Moment - kNm) Fig. 02