Aufsteller A1
A suspended ceiling, otherwise known as a dropped ceiling, usually takes the form of a matrix of metallic supports with rectangular or square tiles positioned in between, which is hung beneath the roof or floor above to give an area for ventilation, wires and cables and pipes, and to create an appealing look without obvious mess.
The suspended ceiling was developed in 1958 by an American named Donald Brown and it has evolved little since that time. Suspended ceilings are generally infrequently seen in domestic situations, but are usually encountered in business office and commercial facilities where building construction techniques differ and additional services including air-con, loudspeakers and fire detection are in use.