DE7730899U1 - SPACER FOR LOWER BELT BARS IN SPATIAL STRUCTURAL STEEL Lattice Girders - Google Patents

Description

Utility model registration G 77 30 899.7

New description 11/30/1977

Spacers for lower chord bars in spatial structural steel lattice girders

! The innovation relates to a spacer for lower chord bars in spatial structural steel lattice girders, Consists of a foot part and four openings in a symmetrical arrangement for inserting udder belt bars having upper part, with means for clamping the lower chord bars at the edge of the openings Are provided.

I) these spacers have next to their actual function of securing the lower chord bars in their mutual position to each other beyond the Task, the required concrete cover for the lower chord of a spatial structural steel lattice girder To ensure.

Older innovation is based on the task of designing the spacer so that it can be fixed by simply turning it can be used around its vertical axis between the two outer lower chord bars. These bars are thereby in their mutual position to each other set. In addition, the spacer should be designed in this way be that he has lower chord additional bars

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different strength can absorb without additional Fasteners are required.

This object is achieved according to the invention in that the internal openings are essentially at the top and the outer openings are designed to be open to the sides.

This training offers the advantage of Spacers for three-dimensional structural steel lattice girders with different thicknesses of the inner chord bars can be used, the distance between the two lower chord bars of the structural steel lattice girder can vary up to three cm.

According to another important feature of the innovation Bind in the openings of the spacer clip lugs intended for plaguing the lower chord bars. These clamping lugs, according to another feature of the innovation, with the side edges of the openings are connected, depending on the strength of the pickled Lower chord bars to a greater or lesser extent and secure the Lower chord bars in their position.

To make it easier to insert the lower chord bars, it is advantageous to use the pinch flags accordingly Another feature of the innovation to give a parallelogram-like shape in such a way that the Side edges of the terminal lugs at an angle into the interior

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the bffwxng are directed.

Another important feature of the innovation is that to secure the lower ^ ural rods against Lateral displacement, especially during the concreting process, at the lower edge of the outer and outwardly open openings cams are provided.

Other features of the innovation are the following Refer to the description of an exemplary embodiment of a spacer.

The drawing shows in a first Fi ^, ur a longitudinal section through a neuerungsgemaßen spacer, wherein the the verüst of the spacer-forming parts are hatched, and an outboard port in a second Fi _& ur a section in transverse direction of a .. "ch.

The spacer according to the innovation consists essentially of a latticework with stiffeners with a foot part 1.7 and an upper part, which is based on the longitudinal center plane of the structural steel lattice girder in a symmetrical arrangement four openings to one another Has definition of lower chord members 1.1 and 1.3.

The openings on the inside are ins. essential from above z% adjusted so that the lower chord additional bars can be used in the direction of arrows A. The openings on the outside, on the other hand, are sideways

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open to the outside world. The lateral accessibility of the external openings makes it possible to the spacer by rotating about its vertical axis according to the arrows S in the lower chord bars 1.3 to turn izine in, so to speak. Then take the lower chord bars 1 .3 the position shown. The insert openings for the internal ühtergurt-additional bars 1.1 are made relatively wide, so that the Spacers also for bars of particularly large thickness can be used see lower chord extension rods 1.1

in broken lines).

To secure the position of the lower chord bars 1.1 and 1.3, Kleam flags 1.4 and 1.8 protrude into the openings. When inserting the rods, the clamping lugs are more or more, depending on the strength of the rods used less elastic bent. The elastic pressure generated in this way causes the lower chord bars to become sicr.er held in their predetermined position.

At the lower edge, the lateral openings have cams 1.5, by means of which cooperate with the iiu Terminal lugs 1.4 a lateral displacement of the lower chord bars is prevented with certainty. At the same time, the lower edge of the side openings is preferred, whereby it forms a cheese 1.6 through which ensures a lateral definition of the position of the spacer in the concrete.

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To the insertion of the üntergurtstäbe 1.1 and 1 to facilitate ο, the clamping lugs 1 _t 4 and 1.8 are directed obliquely into the interior of the openings directed.

As well as parts of the lattice work of the spacer are also the terminal lugs 1.4 and 1.8 with openings 1.9 provided so that a sufficient Eetondui-ch is ensured and the negative Effect of the spacer as a separating surface in the structural steel lattice girder is as low as possible.

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Claims (1)

• I I I ■ et ic · r * «· · Utility model application 5 77 30 899-7 Today protection claims 12/30/1977 1. Spacer for IJnter _ö urtstäbe in spatial construction teel-G-itt he carriers irit a foot part and a four openings in a symmetrical arrangement for inserting the TJntergurtstäbe having upper part, wherein on the edge of the openings means for clamping it are TJntergurtstäbe provided * characterized in that the internal openings are essentially open at the top and the external openings are open at the sides. 2. Spacer according to claim 1 characterized in that in the upper part for clamping the lower chord bars (1.1, 1.3) Kleamfaimen (1.4, 1.8) are provided. 3 · Spacer according to claim 1 and 2, characterized in that the clamping lugs (1.4, 1.8) with their surfaces perpendicular to the axis of the lower chord bars to be inserted (1.1, 1.5) extend. 4 · Spacer according to Claims 1 to 3, characterized in that the clamping lugs (1.4, 1.8) with the side edges of the openings are connected. ι 7730899 I6.oa78 5. Spacers after. Claim 1 "to 4
characterized in that the clamping lugs (1.4, 1.8) have a parallelogram-like shape, the side edges of the clamping lugs being directed obliquely inward. 6. Spacer according to Claims 1 to 5 characterized in that in the area of the outer openings each one clamping lug (1.4) and 2 clamping lugs (1.8) each are provided in the area of the inner openings. 7. Spacer according to claim 6 I, characterized in that the clamping lugs I (1.4) in the area of the outer openings I are connected to the upper edge of the opening and extend with their free end downwards. 8. Spacer according to Claims 1 to 7 characterized in that the clamping lugs 1 (1.4, 1.8) are provided with openings (1.9). f 9. Spacer according to claims 1 to 8 characterized thereby, dab at the lower edge the outer openings cams (1.5) are provided. 7730899 3/16/78 ft ■ «* I I IfI 1 I < 10. AbstanuüüaxΈeΓ after one or more of the previous claims characterized in that in each case the lower edge of the outer opening is formed a nose (1.6) is laterally pulled forward. 11. Spacer according to the preceding claims characterized in that it is made of plastic. 7730899 3/16/78