Hollow floors (hollow floors), also known as cavity floors, are regulated for use in interior construction in DIN EN 13213. They consist of a base course that is supported on a special substructure that forms a cavity between the base course and the raw ceiling that can be used for technical installations (e.g. heating, ventilation, electrical). Together with raised floors, they are part of the system floors. In contrast to raised floors, the base course of hollow floors is homogeneous (jointless). The cavity is only accessible via planned recesses, e.g. in the form of inspection openings or raised floor routes inserted in sections.
Image: "Hollow floor" system structure - baukobox
A. Hollow floor support plate
B. Column
C. Insulation
D. Raw floors
There are so-called wet hollow floors, with a flowing screed as the wear layer, and dry hollow floors made of drywall elements. Both types are also available as a special type with heating and/or cooling function. The supports of hollow floors are usually height-adjustable. If the approval provides for this, the supporting structure of hollow floors can/must in certain cases also be supplemented by load-bearing capacity increasing or horizontally stiffening components such as support elements, trusses or grid bars.
Source: bauwion
