a Determine the zeroforce members in the truss shown below b

a) Determine the zero-force members in the truss shown below.

b) Determine the zero-force members in the truss shown below.

c) The method is joints is to be used to determine the member forces in the truss shown below. Which joint would serve as a good starting joint.

d) Determine the vertical reaction at point A.

Free Body Diagram of the Truss.

CG and GI

3 kip 3 kip 2 kip 8 ft 1.5 kip 4 ft IB 10 ft 10 ft 10 ft 10 ft

Solution

a) option d is correct. FD and BI are zero force members.

b) option d is correct. DE and DC are zero force members.

c)Opyion B. joint A is correct to start.