588821 Prefabricated stable floor element comprising a supporting element (2) made of concrete as a grid, with a service face (6) situated at the top when in use and a bottom face (7) situated on the bottom side, whereby the service face (6) has one or several recesses or openings (5), characterised in that in at least one of these recesses or openings (5) has been provided an insert element (9) made of rubber or an elastic synthetic material, so that the insert element does not cover the supporting element service face, with both supporting element service faces and the top of the insert element forming a working surface.
