hello Mr. Hakan; As you said, I defined floors at low floor level and selected the columns and curtains that pass the floor (change /object edit /column /top as free columns. However, the clones I marked are still seen as short columns by the program. After marking the first It makes compaction at the top and bottom of the s101 (170 cm) column, but if I do not mark it, it does not compress. I think it is not normal for it to compress. Because there is no floor or beam that corresponds to the s101 column (on the ground floor). The vertical extensions of the same column on the 4th floor are different. I guess this is a different situation. What I want is that the beams connected to the low-level floors make compression at the points where they come into contact with the columns. I would appreciate if you could help. (floor height is 340 cm.)