Hello, In the project, one of the rib beams of the D11 and D4 slabs is not fully formed on the slab. If the initial tooth width of the slabs is changed, for example 25 cm and analysis is made, T1=1 sec. calculated around. Notes: -5. The boundaries of the D11 slab on the floor are formed incorrectly -Inclined slabs connected to each other by the slab edge cannot be resolved together in case of analysis according to the semi-rigid diaphragm option. (D1-D2, D11-D12,D6-d7 etc.) -K26-27,K29-30 etc. the elevations of the beams are not compatible with each other. Good work