Hello, In my attached project, I cannot reduce the raft foundation ground stresses, so the additional reinforcement areas are excessive. I have solved the basement flood curtains separately or B2 irregularity appears, is this a wrong thought? According to the architectural project, the part on the basement floor that I marked in red is intended to be built at +1.00 level. How can I define this part? If we can't define it, I guess I'll show it as a filling. Waiting for your comments, thank you.