DE29702615U1 - Steel structure for civil engineering - Google Patents

Description

Chin-Lung CHEN 14929/gl

Taoyuan Hsien, Taiwan/Republic of China 13.02.1997

Steel structure for civil engineering

The present invention relates to a steel support or steel strut that can be filled with concrete and that consists of a housing that has at least four side walls and a square cross-section. Such a support or such a support is particularly suitable for building construction and/or civil engineering, whereby the use of casting molds is not required due to the enclosing of a cavity by the side walls, which can be filled with concrete.

For many years, especially when building concrete high-rise buildings, casting molds were made into which steel rods were inserted and which then had to be moved into the appropriate later position. After attaching a large number of retaining plates forming the casting mold, concrete was poured in to create the final support or beam. After the concrete had hardened, the casting plates had to be removed, after which the outer surfaces of such a reinforced concrete beam or column were covered with plaster for optical reasons.

. &idgr;

However, the manufacture of such a support or beam is complicated because, on the one hand, the steel reinforcements used had to be cut to the desired length and then their end sections had to be bent. Then several steel rods had to be installed so that they assumed their correct position in the support or beam. On the other hand, the cast plates also had to be removed manually after the concrete had hardened. This laborious manual work made the construction more expensive.

It has therefore recently become common practice to use so-called H-shaped beams and columns for building construction and civil engineering, which at least avoid the assembly of the individual steel reinforcements and the bending of the end sections. However, to increase stability, especially on the lower floors, the H-shaped beams must also be embedded in concrete. This also requires casting molds that surround the H-shaped beam, with the associated labor costs. Here, too, the casting plates must be removed after the concrete has hardened.

The object of the present invention is to create a steel column or a steel beam for building construction and civil engineering which can be cast with concrete and in which the use of manually assembled cast plates is avoided, thereby significantly reducing construction costs and at the same time having even greater rigidity .

Starting from a steel support that can be cast with concrete and that consists of a housing that has at least four side walls and a substantially square cross-section, it is proposed to solve this problem that each side wall has at least one receiving groove that is formed by two ribs extending towards the center of the housing.

In a preferred embodiment, the cross section of the housing has the shape of an I.

Furthermore, it is extremely advantageous if a mesh is inserted into two opposing grooves to increase rigidity.

The invention is explained in more detail below with reference to the drawing, in which advantageous embodiments are shown. The drawing shows:

Figure 1 is a perspective view of a part

a steel support according to the invention;

Figure 2 ' an end view of the inventive

steel support;

Figure 3 is a perspective view of another

steel support or a steel strut;

Figure 4 shows a part of a steel support with two inserted mesh sections;

Figure 5 shows another embodiment of a

Steel support with an inserted mesh, and

Figure 6 shows a second embodiment of a

Steel column with an I-shaped cross-section.

As Figures 1 and 2 show, the steel support 1 according to the invention has a housing 11 which has at least four side walls and thus a substantially rectangular cross-section. Each side wall is now provided with at least one receiving groove 13 which is formed by two ribs 12 protruding towards the center of the housing 11.

If the steel column 1 is to serve as the main support of a building, liquid concrete is poured directly into the housing 11, as shown in Figure 3. Due to the rectangular or right-angled cross-section and the relatively smooth surface, no pouring plates are required, so that the work previously required for assembling and disassembling the casting molds is avoided. This leads to considerable cost savings during construction.

Due to the protruding ribs 12 in the steel supports or steel struts, the rigidity of the support or strut is increased considerably. This means that each steel support 1 can bear a larger load.

As Figures 4 and 5 show, in order to further increase the rigidity and thus the load-bearing capacity, in particular in high-rise buildings, a mesh 2 can be inserted into the receiving grooves 13 formed by the protruding ribs 12 that extend towards the center of the housing 11 before the liquid concrete is poured in. The edges of each mesh engage in two opposite receiving grooves 13, whereby, as Figure 4 shows, it is possible to insert two meshes arranged parallel to one another and at a distance from one another in such a way that they each engage in two receiving grooves opposite one another in the long sides, whereas Figure 5 shows that an elongated mesh is inserted parallel to the two long walls of the support into the opposite receiving grooves 13 of the shorter outer walls.

Figure 6 shows that the cross section of the steel support 1 forms a housing 14 with an I-shaped cross section. Here too, the side walls of the housing 14 are provided with a plurality of protruding ribs 141, which form receiving grooves 142 between them. Here too, a mesh 2 can be inserted into two opposite receiving grooves to increase the rigidity.

Although the invention has been described using preferred embodiments, it should be emphasized that it is not limited thereto.

Claims (3)

Chin-Lung CHEN 14929/gl Taoyuan Hsien, Taiwan /Republic of China 13.02.1997 Protection claims 1. Steel support which can be cast with concrete and which consists of a housing which has at least four side walls and a substantially square cross-section, characterized in that each side wall has at least one receiving groove which is formed by two ribs protruding towards the center of the housing. 2. Steel support according to claim 1, characterized in that the cross section of the housing has the shape of an I. 3. Steel support according to one of the preceding claims, characterized in that to increase the rigidity a mesh is inserted into two opposite receiving grooves.