Answer:
Unfortunately, the RF‑CONCRETE Surfaces add-on module for RFEM 5 is not developed for the design of sandwich elements. Therefore, the essential design checks for such structural components are missing there; for example, shear joint design (regardless of whether it is a wall or a slab).The bending design, and in particular the design of shear resistance, is considered for constant cross-sections.
You can model the sandwich elements as surfaces with a constant thickness and perform the design with RF‑CONCRETE Surfaces. If necessary, the additionally required designs would have to be performed manually.
