DE2306379C3 - Concrete ribs, concrete rib slab element or the like for ribbed ceilings - Google Patents

Description

The invention relates to a concrete rib, concrete rib slab element od. dg !, with prestressed steel wire reinforcement for ribbed ceilings, preferably with lost circuit arcs for the in-situ concrete, in which the rib foot has several spacing from each other Steel wires as load-bearing reinforcement and at least one steel wire in the rib crown as transport reinforcement are arranged, the one below the other by formed by two wires, essentially zigzag extending stirrups are connected.

Such a rib element has become known from the German Auslegeschrift 11 86 021. Here exist the brackets each consist of a wire coil that is pulled apart so that the wire is in the installed state has a zigzag shape. When using such wire coils, it is necessary for the production of the Reinforcement complicates the fact that the wire coils must be pushed onto the steel wire reinforcement prior to tensioning them.

The invention is based on the object of providing a stirrup reinforcement for a rib element of the type mentioned at the beginning Creation of a type that can also be installed after the steel wire reinforcement has been tensioned.

According to the invention this is achieved in that the one wire with its upper bends over the Transport reinforcement wire is hung in the rib cion and alternating with its lower turns left and right to below the lowest layer of the reinforcement wires and the other wire the reinforcement wires at the top and sides, with the lower turns of the two wires together align and both wires by means of nails or the like. Are secured in their position on the lower The bends and reach under the reinforcement wires.

This training makes it possible to apply the stirrup reinforcement from above over the load-bearing or Trar.sportbewehrung to be turned over, which can also be done after the steel wire reinforcement has been tensioned.

In the drawing are exemplary embodiments of the invention shown. It shows

F i g. t a ribbed concrete element of a ribbed ceiling,
F i g. 2 shows a concrete rib slab element of a different ribbed ceiling, each in cross section and the

F i g. 3 and 4 the pre-tensioned reinforcement wires together with the zigzag stirrups in plan and floor plan.

A rib element 1 has a wide rib base 2 which merges into a slender rib which, at a corresponding height, has a widening on both sides as a support for lost formwork arches 5. The widening tapers towards the rib foot in order to save material and weight. On the rib crown 3 distributor rods 6 are placed, in which reinforcement brackets 7 are suspended. After the in-situ concrete 8 has been applied, the ribbed ceiling is completed except for the soffit.

The supporting reinforcement in the rib base is, for example, pre-tensioned by eight, preferably nubbed Support reinforcement wires 9 formed. These are combined by means of a wire 10 forming a zigzag bracket, whose turns 11 lie alternately to the left and right of the reinforcement and the lowest four support reinforcement wires 9 reach under.

For connecting a transport reinforcement wire 12 arranged in the rib crown 3 to the supporting reinforcement wires 9 a zigzag bent wire 13 is provided, which is attached to the transport reinforcement wire 12 is hooked in and its side triangular brackets alternately left and right down protrude. The lower bends 14 of these brackets also reach under the deepest layer of the supporting reinforcement wires 9 and align with the bends 11 of the wire 10. Nails 15 are inserted at these points, which rest on the bends and below the lower layer of the reinforcement wires 9 to come lying down. In this way, the position of the bracket is secured and slipping is prevented.

After the reinforcement wires 9 and 12 have been tensioned, the brackets formed by the wire 10 are between the top reinforcement wire 9 and the middle one Position of the same pushed laterally, so that the wire 10 rider-like on the middle layer of the Support reinforcement wires 9 rests. Then the wire 13 is suspended from the transport reinforcement wire 12, brought the bends of the bracket to align and the nails 15 inserted. That’s the reinforcement completed.

In the case of ribbed concrete elements, such as part of one in FIG. 2 is shown is for reinforcement of the Plate a structural steel grid 17 is provided, on the mesh size of the division of the wires 10 and 13 consideration must take.

For this purpose 2 sheets of drawings

Claims (1)

Claim: Concrete rib, concrete rib slab element or the like with prestressed steel wire reinforcement for rib ceilings, preferably with lost formwork arches for the in-situ concrete, in the case of the rib base Several steel wires spaced from one another as load-bearing reinforcement and in the rib crown at least one steel wire are arranged as transport reinforcement, which are interconnected by two Wires formed, essentially zigzag extending bracket are connected, thereby characterized in that the one wire (13) with its upper bends over the TYansport reinforcement wire (12) is hung in the rib crown (3) and alternating with its lower bends (i4) left and right to below the lowest layer of the reinforcement wires (9) and the other Wire (10) encompasses the reinforcement wires (9) at the top and at the sides, with the lower bends (11, 14) of the two wires (10, 13) are aligned and both wires by means of nails (15) or the like. are secured in their position, which rest on the lower bends (11, 14) and the supporting reinforcement wires (9) reach under.