3. A sign is subjected to a wind loading that exerts horizontal forces of 300 lb on joints B and C of one of the side supporting trusses. Determine the force in each member of the truss and state if the members are in tension or compression. 300 lb- 080 13 ft 12 ft 300 lb- B 5 ft A 45° 12 ft 13 ft 4. Determine the force in members GF, FC, and CD of the cantilever truss. State if the members are in tension of compression. Assume all members are pin connected. 12 kN E 12 kN 12 kN A |B D -2 m 2 m 2 m -2 m 3 m 5. A double scissor truss is given below. Solve for the forces in members AC, CE, and CD. B C A L/3- E L/3. -L/3 P P L/3 D