7.6 and 7.7 Use the virtual work method to determine the vertical deflection at joint C of the truss shown in Figs. P7.6 and P7.7. 15 ft (3 in.²) D (4 in.²) (3 in.²) (4 in.²) 20 ft- (3 in.²) E B 25 k E = 29,000 ksi (4 in.²) (4 in.²) 20 ft- C 25 k

In structural engineering, a beam is a component made of a variety of materials (including steel alloys, and wood) that can resist loads applied laterally to the beam axis. Members, elements, rafters, shafts, and purlins are all terms used to describe be…