Raised floor

As a double floor is called a second tray above the actual floor of the room. It differs from the hollow ground in that each point in space remains accessible at all times below the raised floor. Thus it is particularly suitable for rooms with frequent changes in the installation and when the installation shall always be quickly accessible.

In construction is called a double bottom floor system design as suspended floor construction consisting of industrially manufactured modular elements, mainly plates and columns. The floor panels are usually made of wood ( high density flat pressed plates), fiber cement, anhydrite, gypsum ( fiber-reinforced gypsum board ), steel or aluminum. These plates are supported on the double bottom supports made from steel or aluminum. The supports can be connected at their heads by stringers together.

In the cavity thus created for all installations as communications, electricity, water can be integrated. In addition, the raised floor is mainly used in cleanrooms often used to carry through countless small holes and thus a very large flow cross- sectional area of the exhaust air from the room, so that a laminar flow of air from the ceiling (supply also on large cross-sections ) to the floor in the room sets. It turns the entire cavity quasi an air duct dar.

Especially for electric rooms or areas in which high demands are placed on lateral stability and load, using a so-called control room floor (or false floor control room ). This system consists of heavy-duty props on which continuous steel C profiles in one hand and adapters are bolted in the other direction. Within walking distance of raised floor panels are laid on this profile grid sub-structure; in the cabinets, however, are formed with higher C - profiles frame. To follow all the plates can be including in the development of enclosures decrease and subsequent installations can be performed easily.

The performance evidence for these floors done according to EN 12825 for raised floors. The standard applies in Germany as DIN standard DIN EN 12825th For ground systems, which comply with the standard and the application policy, so-called conformity certificates are issued.

Further use of the term

The term double bottom is also used in ship and boat building use.

For shipbuilding, see: double floor ( shipbuilding)
For boat building: it involves two superimposed floors that are laminated together. There is air between the two floors.
Also, a formation of the chart analysis is referred to as double floor, an interpretable as a trend reversal price patterns, which describes about the history of a W.