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Device for producing a prefabricated cast concrete element having a plurality of central structural elements each comprising two parralel welded wire lattice mats, straight bridging wires welded at each end to the two wire lattice mats holding the wire lattice mats at a predetermined mutual separati

Device for producing a prefabricated cast concrete element having a plurality of central structural elements each comprising two parralel welded wire lattice mats, straight bridging wires welded at each end to the two wire lattice mats holding the wire lattice mats at a predetermined mutual separation and an insulating member penetrated by the bridging wires arranged with its cover surfaces parallel to the wire lattice mats and at a predetermined distance to the latter and having two concrete shells which each adjoin the insulating member and completely enclose the wire lattice mats of the structural elements, characterized in that a plurality of central structural elements are each arranged with their narrow sides abutting one another with selectable spacing between two shuttering walls and the spaces between the insulating members of the structural elements and the shuttering walls completely filled out with concrete.

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The invention claimed is: 1. A device for producing a prefabricated cast concrete element, comprising: a plurality of central structural elements, each of the plurality of central structural elements comprising two parallel welded wire lattice mats, straight bridging wires welded at each end to the

The invention claimed is: 1. A device for producing a prefabricated cast concrete element, comprising: a plurality of central structural elements, each of the plurality of central structural elements comprising two parallel welded wire lattice mats, straight bridging wires welded at each end to the two wire lattice mats holding the wire lattice mats at a predetermined mutual separation and an insulating member penetrated by the bridging wires arranged with its cover surfaces parallel to the wire lattice mats and at a predetermined distance to the wire lattice mats; shuttering walls arranged on opposing sides of said plurality of central structural elements, each of said shuttering walls comprising a plurality of sections connectable to one another; and a plurality of spacing members composed of rustproof materials arranged and dimensioned for defining a spacing between each of said plurality of structural elements and said shuttering walls for receiving concrete for forming concrete shells, wherein the wire lattice mats comprise longitudinal and transverse wires and said spacing members comprise spacing elements having cruciform slits arranged and dimensioned for receiving selected points of intersection of said longitudinal and transverse wires of said wire lattice mats and having ends opposing said cruciform slits braced against said shuttering walls. 2. The device of claim 1, wherein each of said spacing elements is composed of plastic and has feet tapering towards the end. 3. A device for producing a prefabricated cast concrete element, comprising: a plurality of central structural elements, each of the plurality of central structural elements comprising two parallel welded wire lattice mats, straight bridging wires welded at each end to the two wire lattice mats holding the wire lattice mats at a predetermined mutual separation and an insulating member penetrated by the bridging wires arranged with its cover surfaces parallel to the wire lattice mats and at a predetermined distance to the wire lattice mats; shuttering walls arranged on opposing sides of said plurality of central structural elements, each of said shuttering walls comprising a plurality of sections connectable to one another; a plurality of spacing members composed of rustproof materials arranged and dimensioned for defining a spacing between each of said plurality of structural elements and said shuttering walls for receiving concrete for forming concrete shells; and a base plate, wherein lower ones of said plurality of central structural elements are fixed firmly in position with reinforcing irons anchored in said base plate.