> The limiting factor for tall buildings is elevators: The taller the building, the greater a percentage of the floor space gets taken up by elevator shaft Tha

> The limiting factor for tall buildings is elevators: The taller the building, the greater a percentage of the floor space gets taken up by elevator shaft That’s only true if you plan for getting about everybody into and out of the building every day, at ground level. There are some ‘designs’ (rather: rough ideas, typically in science fiction, and often dystopian) that let go of that constraint (think flying cars landing on balconies or enormous buildings where people mostly live and work on a few floors of an enormous building)