First of all, thank you. Since there is no flooring on the 2nd floor, the program says to create a rigid diaphragm and solve it or the structure without a diaphragm. ??"unver":qj7dra5p" said:Mr. Gulsah -if you define the foundation by considering both ends of the curtains, there will be no problem. -you don't have a floor on the second floor. Give the beams there as beams with a level difference, like the beam of the first floor, remove the second floor. EASY Unver ÖZCAN