Hello Nedim, I totally agree with what you said. We are writing what we see here to warn those who make projects. It happens sometimes when we get angry. But know that we are your best friend because we want you to make no mistakes. In addition to this project, there are errors in beams, stair bracings, floor slopes almost everywhere. My advice to my young friends who are just starting out on this subject. Starting five years before I was lazy on the forum, I recommend that they examine what problems exist in all projects and what has been proposed as a solution to the problem, and then make a project. (Spend less time on sleep until this review is over.) There is never any hopelessness. (I couldn't do a very simple project when I just started, I learned it by asking questions.) Keep working. Unver ÖZCAN