This is a dumb question, I know. So for highrise buildings that have stairs that lead to the rooftops, could they also be considered a floor if you walk on them? If not, what word could also be used to describe the 'ground' of the rooftop? If you don't understand my question, here's an example. Say someone is on the rooftop, and that he wants to sit down. He sits down on... what? The floor? The ground? The rooftop? [spoiler]i probably sound retarded[/spoiler]