I define slope for slab, beams and columns for sloping roof, but incorrect sloping slab error appears. Can you help. If you add your project, we can write a more accurate answer.
Hi, there is no option to model cassette and rib flooring as inclined. Alternatively, you can define each of the rib/cassette beams as beams and insert slabs between them, and solve with the semi-rigid diaphragm option.