Assemblies
Assemblies are way to define an entity that is formed from a collection of elements or members and can be thought of as a super-element. This is not an analysis entity but just a convenience for post-processing such as cut section forces. Typical uses of assemblies include cores, where the core is modelled with 2D finite elements, or trusses where the truss is modelled with top and bottom chords and bracing. In both these cases the assembly is identified by a list of included elements.