Expert Answers

A) Explain briefly why this structure in Figure 2 can be modeled as a pin-jointed structure (PJS) for the purpose of determining the axial forces in the members

B) Show that the structure is statically determinate. 

C) Determine the reaction forces at supports A and B.

D) Using the method of joints determine the axial forces in members AC and AF.

            Isolating joint A gives the following free-body diagram:

E) Using the method of sections, determine the force in member GH.