1-My preference would be to lay a thick slab on the condition of being able to turn it with deep beams. However, if threaded flooring is to be made, my advice is to install the D15 and D12 floorings in the same direction as the continuation of the cantilevered floorings. Because we don't like discontinuous gear tiles defined on consoles. However, in this case, you will have an additional load on the inserted beams and this will force the beams into which these beams are inserted. At the same time, I do not prefer to use different flooring systems on the same floor unless it is necessary. Especially if a solution is to be made by accepting a rigid diaphragm. The choice is yours... 2-You have chosen a mixed system. Considering the column-wall densities, high ductile curtains in both directions seem to meet the alphas> 0.40 condition. In this case, the bulkheads undertake the task of carrying horizontal loads. What I mean by explaining this is that there are no frameworks in your system. If we take the system in general, I think that you should at least provide continuity in the axles where the curtains are in order for your curtains to be included in the system. Otherwise, D=15 cm slabs connected to the walls rather than beams will undertake the task of transmitting the earthquake load between vertical carriers. Serious effects may occur in the areas where the floors are supported on the curtains... I hope you accept a semi-rigid diaphragm... 3-You have studs close to the column, do the studs and studs with studs have the same dimensions? 4-probably because it is a wall, you used tape beams. However, since these beams are not supported on the column, I think they are unnecessary. As it stands, there is no benefit to the system. Even when they are supported on the remaining column, their benefits are discussed. Instead, I recommend thickening the tiles locally. In this way, you will benefit from the situation I mentioned in the 2nd article... If there are wrong ones among my preferences, please correct them.. Good work....