Abstract: The invention concerns a half shell element (10) for the production of a hollow body with an identical further half shell element (10), with at least one guide (20 . . . 20??) for the further element (10), which is constructed in the region of a first half periphery (11) of its encircling edge (12), so that the further element (10) can be pushed onto the half shell element (10) from the second half periphery (11?) of the edge (12) lying opposite this first half periphery (11) and guided on the edge (12) and held in a final position. The hollow bodies which are thus produced can be both inserted into steel cages and also connected with each other via bars and built into concrete layers.

Abstract: The invention relates to a prestressed slab element (10), in particular a concrete slab element, manufactured according to the in-situ concrete method or prefabricated in a concrete precasting plant which in top view of its surface (11) comprises at least one hollow element region (20) with hollow elements (21) contained therein and at least one support region (30) for supporting or holding the slab element (10) without hollow elements (21), as well as stressing elements (40) for reinforcing the slab element (10), which each are installed through the slab element (10) and form a lattice-shaped structure (50), wherein individual fields (51) of this structure (50) establish a support or hollow element region (20, 30), and laterally adjoining fields (51) of the lattice-shaped structure (50) form at least one longish support strip (60) which joins individual support regions (30) with one another and which is embodied in a reinforced manner, characterized by stressing elements (40), which in a lateral view of the

Abstract: The invention concerns a half shell element (10) for the production of a hollow body with an identical further half shell element (10), with at least one guide (20 . . . 20??) for the further element (10), which is constructed in the region of a first half periphery (11) of its encircling edge (12), so that the further element (10) can be pushed onto the half shell element (10) from the second half periphery (11?) of the edge (12) lying opposite this first half periphery (11) and guided on the edge (12) and held in a final position. The hollow bodies which are thus produced can be both inserted into steel cages and also connected with each other via bars and built into concrete layers.

Abstract: The invention relates to a prestressed slab element (10), in particular a concrete slab element, manufactured according to the in-situ concrete method or prefabricated in a concrete precasting plant which in top view of its surface (11) comprises at least one hollow element region (20) with hollow elements (21) contained therein and at least one support region (30) for supporting or holding the slab element (10) without hollow elements (21), as well as stressing elements (40) for reinforcing the slab element (10), which each are installed through the slab element (10) and form a lattice-shaped structure (50), wherein individual fields (51) of this structure (50) establish a support or hollow element region (20, 30), and laterally adjoining fields (51) of the lattice-shaped structure (50) form at least one longish support strip (60) which joins individual support regions (30) with one another and which is embodied in a reinforced manner, characterized by stressing elements (40), which in a lateral view of the

Abstract: Module (1) for the production of concrete elements, particularly of concrete semi-finished products or of relatively “thin” in-situ concrete surfaces. The modules includes a plurality of displacement bodies (5, 5?, 5?, 5??) able to be inserted and arranged adjacent to each other in a longitudinal direction. The plurality of displacement bodies (5, 5?, 5?, 5??) is arranged respectively undetachably in a latticework (2) of bars (3, 3?, 4, 4?, 4?). The displacement body (5, 5?, 5?, 5??) is formed as a substantially oblate rotation ellipsoid with two at least slightly flattened pole sides (7, 7?, 8, 8?).

Abstract: Module (1) for the production of concrete elements, particularly of concrete semi-finished products or of relatively “thin” in-situ concrete surfaces, with a plurality of displacement bodies (5, 5?, 5?, 5??) able to be inserted arranged adjacent to each other in a longitudinal direction, in which the plurality of displacement bodies (5, 5?, 5?, 5??) arranged adjacent to each other is arranged respectively undetachably in a latticework (2) of bars (3, 3?, 4, 4?, 4?), in which the displacement body (5, 5?, 5?, 5??) is formed as a substantially oblate rotation ellipsoid with two at least slightly flattened pole sides (7, 7?, 8, 8?).