Hello!, Well, basically my recomendations are to mesh with 1-D CBAR/CBEAM elements the structural members and mesh with Shell 2-D CQUAD4 the to plate. Alternativelly you can mesh the full model with shell elements.
The geometric requirements are the following: 1.- for the beam elements you must create center lines of cross sections for structural members, you will use them to mesh with 1-D CBEAM/CBAR elements. You must use CBEAM elements to mesh the open cross sections, and optionaly CBAR for the symmetric closed cross sections. 2.- You can use the end surfaces of the cross sections of the structural members to compute automatically the cross section properties. 3.- You must create in the idealized file both the center lines and the midsurface of the top plate. 4.- And finally use rigid elements RBE2 to define the joints between CBEAM & CQUAD4 elements. Or optionally to define OFFSETS in BEAMs.
Basically these are the steps to follow, but if you are new in this job, better ask a training course from an expert, there are many tricks involved to arrive to a successfull analysis solution.
Thanks a lot of your reply. Actually I am not new in CAE, but for sure not more than an intermediate user. I have only solve projects for plastic parts, using 3D mesh.
Regarding my Beam Assy I will follow your instructions and let you know.