Hello, 1.) Consider earthquake effects in the flooring design in the analysis settings. 2.) Change the reinforcement arrangement of the slab calculation axles from "flat+pile" to "flat on top+flat on bottom". After applying this, inspect the additional reinforcements in the additional reinforcements tab in the slab reinforced concrete dialog. You can also examine the internal forces that occur in the slab for always vertical and always earthquake combinations in the 3D visualization. Examine the axial tensile/compressive forces that occur in the floor plane, especially at the vertical carrier element edges (F11, F22). By dividing the largest axial tensile/pressure value by the yield strength fyd of the reinforcement, you can approximately find the required reinforcement value corresponding to the axial tensile/pressure value. By comparing the bending reinforcement with this value, you can increase the floor reinforcements if necessary. 3.) Your building is in the 4th seismic zone and in TDY 2007 article 2.5.1.4, the condition "beamless slabs without walls will be considered as systems with normal ductility level" is specified. There are only 2 curtains in the x direction in your building. There are no curtains in the y direction either. You cannot solve this structure with a high ductility level. a. If you choose the structure with normal ductility level (R=4), you should provide alpha>=0.75 run in both directions. (TDY 2007 Article 2.5.3) b. You can get R=6 if you choose the ductility level mixed structure, but you must provide at least the alphas> 0.4 run. See item TDY 2007 2.5.4.1 for details. Assuming that you are asking for the TS500 minimum thickness control, you can determine the cork slab angle value by considering the largest span value between the two column axes. For console parts, you can determine the thickness control given in TS500 for consoles, based on the largest opening value from the column axis to the console end.