Hello. My suggestions about modeling; --Fix errors in geometry check, --2. remove the curtains in the basement that are not connected with the building, --2. In the basement floor, you can connect the outer axles with 25/50 beams, --S04 and S17 columns are left alone VERY FAULT MODELING you can make a cassette like the one on the left and connect them exactly, --Check the elevator engine room tick, --Rx=7 Should be A15, Ry=8 A=11, - Check the beams and floor for deflection, - Support the stairs and solve them together, - Increase the thickness of the stair plate, - Lift the columns in front of the elevator curtain and make curtains, -Make the curtains as a group, --4. You can reduce the slab loads on the floor ceiling, remove the wall loads, so you can avoid the maximum floor stress error, --Enter linear wall load where there is a wall above the floor, --Enter if there is an elevator machine floor, --Calculate the finite element widths by 0.25 m. finish. Unver ÖZCAN