Method of Sections: Frame vs. Trusses

[Krazer101]

Is it possible to use method of sections on a frame or only on trusses? I have a frame that opposes a horizontal load and to find the forces in each member, I used method of sections. Is this right or is the only way to solve the forces is by analysis of each member.

 

[Mech_Engineer]

When you say frame, do you mean the connection points between each member are fixed in both rotation and translation (e.g. they are moment connections)?

 

[Topher925]

Method of sections only works if your structure is entirely composed of two-force members. This also holds true for the method of joints. If your structure contains moments or the assumption of only two-force members is not valid, then neither method will work and you will need to look at more complex methods (finite element).