Nope. Even if it was possible, the actors above it will not move with the floor, so that means if the floor moves, anything standing on it will eventually fall down.
The closest you could manage would be an object with a model that looks like a 3D floor. But you'd still have the problem Nash mentions. Perhaps it might be possible to use ACS to get the position of the thing and the player and move the player with the object if he is on the floor?
Good idea Enjay but nearly everybody knows that I haven't got doctorate in ACS and with this I mean I am seriously stupid in ACS work (not to mention models...)