I don't think so, unless some major exoskeelton is built around the building to support the top floor-supported by new posts and beams. Those data centers are heavy. can't a\have that waving in the air.

Alshully, putting them in a basement is a better idea. But that is complicated in terms of land rights. Who owns the 'underground services' under the 'land'? Already the local authorities own the 'sewer' that lies underground. But what happens when it is an entire data centre?

Think 'horizontal drilling' wars in the oil-game.