Mr. e.zrl I looked at your project. It looked like a project that needed to be solved easily. With a few adjustments, the result was achieved. Respectively: - Make a beam in front of the elevator. You should also make beams on the side of the stairs behind it. There will be walls. and therefore you may have to press the wall onto the stairs.On the other hand, the P3 curtain will be included in the system in the y direction, even with a stud beam. - Let's come to your floor in front of the elevator (D11); Since the Y direction of this floor coincides with the slab edge of the calculation axis, the program will be called cantilever slab in automatic definition. First of all, you can shift the reinforced concrete calculation axis (if you are not going to make beams) or you can convert the reinforced concrete calculation axis into flat + pillar shape with edit. - You have entered the floor load of 0.500 for all floors. I don't know if this value is suitable for use. Maybe it can be like this on lower floors (Bodrum, Ground, etc.). If this is not the case on other floors, check the loads.Also, check the thickness of the entire floor by 15 cm. you entered. Accordingly, the self-loads and the mass of the building will increase. This will cause you to achieve challenging results. (like earthquake effect, basically stapling etc.) - Again, if not necessary, you can lower the live loads on the attic and remove the wall loads on the beams. The ground tension value is already very low, I think there is no point in loading the building unnecessarily in such a case. -I'd like to make one final criticism. Most of the columns look in the same direction. If it were me, I'd be surprised. Especially the ones on the same axle. When you do it this way, you won't have any problems, including the foundation. In general, sending projects is not my preferred method, but I am sending you your project as an attachment. Good work. N. YILMAZ Note: I think your reason for entering the P1 object as a curtain, even though it is in column size, is reserved for you.