Abstract: A floor plate which is adapted to accommodate a filler material includes a base plate and a frame; a plurality of ribs extending parallel to one another and projecting from the plane of the base plate. The frame extends integrally from the base plate along a perimeter thereof and in the same direction as the ribs. A plurality of reinforcing rails extends parallel to one another and perpendicularly to the ribs; each rail is fastened to several ribs. A channel is formed along a free circumferential edge of the frame; the channel is open in a direction toward the plane of the base plate.