7. The beam shown in the accompanying figure is a wide-flange W18 x 35, with a cross-sectional area of 10.3 in and a depth of 17.7 in.
The second moment of area is 510 in". The beam is sub- jected to a uniformly distributed load of 2000 lb/ft.
The modulus of elasticity of the beam is E = 29 x 10° Ib/in?. Using manual calculations, determine the vertical displacement at node 3 and the rotations at nodes 2 and 3.
Also, compute the reaction forces at nodes 1 and 2 and reaction moment at node 1.

2,000 lb/ft 1 14 ft - 7 ft