Answer:
For general cross-sections, including the SHAPE‑THIN cross-sections, you can only perform the elastic design in RF‑/STEEL EC3: The plastic interactions are only applicable to a few cross-section shapes.
For general cross-sections, including the SHAPE‑THIN cross-sections, you can only perform the elastic design in RF‑/STEEL EC3: The plastic interactions are only applicable to a few cross-section shapes.