Abstract: In order to rapidly and automatically separate especially worn floor coverings (12) of raised floor panels (10), preferably three separating apparatuses (17) are incorporated with motor powered cutting blades (18) in a device (13) which beneath the separating apparatuses (17) has a carriage (29) with holders (31) for the raised floor panel (10) which is to be treated. The carriage (29) can be moved by motor back and forth transverse to the cutting blades (18) of the separating apparatuses (17) or parallel to the longitudinal axis of the device (13). The separating apparatuses (17) are in turn fixed pivotally around a horizontal axis (19) on a base plate (21). Base plates (21), while being provided with springs and thus shock-absorbing, are in turn fixed on a transverse, portal-like frame part (15) movable to a limited extend in the direction of the longitudinal axis of the device (13).

Abstract: It is known to lay out the floorboards of raised floors on grid girders, which are attached to the cover plates of legs of the raised floor. The grid girders are either inserted into suitable recesses in the cover plates where they may be made secure in these recesses by means of tongues which engage in boreholes in the cover plates, or else under more stringent specifications they are screwed into the reinforcement of the raised floor with the cover plates. Until this time, for the two variations of assembly, two different types of girders have also been produced. Both variations of assembly can be attained by use of the grid girder according to the present invention. For this purpose, the side walls of the grid girder are provided with beveled ends in such a manner that the grid girder, when viewed from the side, has the shape of a parallelogram. At the ends of both of the other walls of the grid girder are provided in turn tongues or oblong apertures for the passage of fastening screws.