Answer:
Basically, the question arises whether the consideration of a split-level slab in the structural model is relevant or not.
If the split-level slab is to be taken into account for the determination of internal forces, it can be modeled as a surface model (folded plate structure; see Image 01). There are two horizontal surfaces (ceilings) and one vertical surface (offset of height). The surfaces can then be designed in RF‑CONCRETE Surfaces.
Optionally, the internal forces in surfaces occurring in the split-level slab can also be integrated as member internal forces. For this, the "result beam" member type is recommended (see Image 02). The internal forces of result beams can then be used for the design in RF‑CONCRETE Members (see Image 03).
You can find more information about using result beams for the ceiling design in two technical articles of our Knowledge Base under Links below.
