Equilibrium  
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The figure shows a beam B C supported by a rod A B. The beam is bolted to a pole at C and the rod is bolted to the pole at A. The supporting rod is labeled 1. A weight w is uniformly distributed on the beam. The length of the beam is 5 meters and point A is 3.5 meters below point C.

Begin by considering the equilibrium of beam BC.

Draw the free-body diagram for beam BC. Note that member (1) is a two-force member.