HELLO, in my project, there is a level difference between the ground floor shops and apartments. (building with basement) apartments +80, shop +30 there is a 50 cm level difference between them. I defined the upper level for the beam and floor in the corresponding places. Is there a need to define the upper level for the columns and curtains? I throw the column in the basement floor, I entered 50 cm upper level, how can I interfere with the column on the ground floor for this? Thank you for your interest