Answer:
The IFC interface is divided into several areas, called views. The export from RFEM/RSTAB is carried out in StructuralAnalysisView. In this case, it is possible to transfer a structural model with member elements, concentrated loads, line and member loads, supports and support conditions, load cases, and so on. Import of the IFC file generated from RFEM/RSTAB is only possible in third-party software if it also supports StructuralAnalysisView.