Dear İzmirlimühendis, frankly, I did not fully understand your question. Elevator towers are formed by raising the appropriate columns or panels coming from below. An object used for masonry bonded buildings on a wall. Do you need a column or curtain on the roof floor where you can sit the elevator tower? Beam on the wall is a constructive element and does not transfer any load to the bottom. My advice is to have the vertical elements of the existing structure and structures such as the elevator tower move. Otherwise, there is no point in modeling a non-load-bearing element on a reinforced concrete structure.