Hello, I have an issue that has been on my mind lately. As you know, in most of the multi-storey buildings, a "U" shaped core curtain is designed around the elevator. It will be a better design in terms of static, as the regular distribution of the curtains around the structure will reduce the distance between the center of rigidity and the center of mass. Moreover, if the elevator curtain is not in the middle of the building, another curtain is placed in front of it to reduce the distance between RM-KM and this brings extra costs. My question is, what is the design that will provide the necessary conditions for the elevator installation and allow us to position the curtains around the structure? Is it more logical to put spaced columns instead of elevator bulkheads?