Note that at point C, the force at each member will be equal and opposite. There are 6 unknowns now. For each member, we have 3 equilibrium equations available. Thus, there are total six equations and we can find out six unknowns.
| Frames |
Note that at point C, the force at each member will be equal and opposite. There are 6 unknowns now. For each member, we have 3 equilibrium equations available. Thus, there are total six equations and we can find out six unknowns. |