The figure shows the free body diagram of the rigid bar A C B and the supporting rods. The free body diagram cuts through rods 1 and 2. The force along rods 1 and 2 are F subscript 1 and F subscript 2 directed vertically upwards. The force at the end point D of the support rod C D has a magnitude of 80 kilo newtons and is directed vertically downwards.

Begin by drawing a free-body diagram (FBD) that cuts through rods (1) and (2).