1. The problem statement, all variables and given/known data A small square truss shown is supported by a pin joint at I and a roller at A. Label all members of the truss by Z (for zero force member), C (for compression) or T (for tension). 2. Relevant equations 3. The attempt at a solution So this was an exam question on a past test and I have troubles understanding how to calculate this in a fast manner. I usually just use method of joints for each member and determine it that way. But I don't know how to determine tension/compression by looking at a truss. I've asked a couple people but I never understand what they mean... What is your guy's approach/thought process when solving this problem? My next exam is coming soon and I really hope to get a better understanding of this!! Thank you very much.