It depends on the building. A three story brick & concrete building may be able to handle a data center on the top floor. As you get into the 80 floor skyscrape

It depends on the building. A three story brick & concrete building may be able to handle a data center on the top floor. As you get into the 80 floor skyscrapers you're getting into buildings where you have to start worrying about exactly how they wave in the wind, something I don't tend to think about at all. Trying to stick a datacenter on the 75th floor there may be a noticeably bad idea. Scale isn't just an issue for programmers.