Homework Sourse73 PROBLEMS 217 Classify each of the structures as staticall
73 PROBLEMS 2-17. Classify each of the structures as statically determinate, statically indeterminate, or unstable. If indetermi Prob. 2-17 
Solution
1) It is unstable structure. Horizontal unstability.
Statically determinate.
D.O.I = 2-3 = -1
2) It is stable structure.
Statically determinate.
D.O.I = 3-3 = 0
3) It is stable structure.
Statically determinate.
D.O.I = 4-3-1 = 0
4) It is stable structure.
Statically determinate.
D.O.I = 3-3 = 0
