Sure about that - floors are raised so cabling goes underneath. I think the counterpart you'll be looking for is suspended ceiling (or drop ceiling).

Careful placement of pathways, eg, within cavities in the suspended ceiling, raised
floor, or drywall, also guarantees a usually sufficient level of physical ...
www.bicsi.org/win200013.htm

Ejemplo:

System components for false floors

In the case of false floors, the cables are drawn in the space between the raw floor and the false floor panels to under-floor distributors from where mains power, telecommunication and data cables are led to sockets.

(http://www.ackermann.com/english/inst/ff.html)

Suerte!