DE2354694A1 - CROSS BEAM WITH OPEN GRILL - Google Patents

Description

a pair of elongated load-bearing parts parallel in spaced relation to each other through a zigzag steel band is held. It is one continuous rod connected to the grid and serves as a support surface which extends parallel to the load-bearing parts for the purpose of supporting a plurality on mold support parts that extend transversely to the cross member.

The invention relates to a cross member and, more particularly, to a steel construction cross member with an open grid which is used for construction work in the In connection with multiple residential units, parking garages, shops and other commercial and industrial buildings.

Structural steel cross members are generally known of the type in which a pair of load-bearing parts are in a parallel spaced relationship 'be carried by a railing. Such cross members have resistance to vertical Bending, loading, overstressing, etc., which is comparable to massive beams, but have the same a relatively light weight, so that they can be handled and shipped relatively easily. Continue to own they are usually standard sizes and are therefore relatively easy to set up on site.

40 982A / 0687

These cross members are particularly beneficial in building economical concrete floors for low and high buildings, since they can be installed relatively easily so that for the concrete results in a supporting framework made of steel. In such a design, a plurality of cross members kept in the spacing relationship by traverses and following this, permanent metal forms are in place over the cross members and trusses arranged, creating a continuous Surface is formed on which to place the concrete. However, metal molds make it impractical to combine with trusses work and are relatively expensive.

An object of the invention is therefore to create a cross member of the type specified, which is a load-bearing Has surface for receiving a plurality of molded support parts that extend between the parallel cross members, so as to provide an improved system for supporting the repeated use concrete forms.

Another object of the invention is to to create a cross member configuration that is economical Development of the composite work between the concrete and the trusses and / or cross members facilitated.

To solve these problems, a steel cross member is now according to the invention created with an open grid, which consists of a pair of elongated, load-bearing parts, a zigzag-shaped steel— band extending between these load-bearing parts while supporting them in a parallel spaced relationship, as well as an assembly connected to the grating to form a surface that extends extends parallel to the load-absorbing parts, for the purpose of supporting a plurality of form-supporting parts, which extend transversely towards the cross member extend.

409824/0687

An embodiment of the invention is shown in the drawings and is described in more detail below. Show it:

Fig. 1 is a partial elevation of the cross member according to the invention,

Fig. 2 is a view in section along the line 2-2 of Figure 1 and pulled apart and shows a plurality of cross members, which are arranged in a typical construction project;

Fig. 3 is a perspective view showing two of the cross members according to Figure 2 reproduces, partially showing a concrete slab that can be formed over the cross members.

With reference to Figure 1, the steel cross member according to the invention with an open grid, an upper part 10 which absorbs the loads and a lower part 12 which absorbs the loads on that in the parallel spacing ratio by means of the zigzag Steel strap 14 are worn. Parts 10 and 12 are made in a conventional manner, preferably starting from of sheet steel of appropriate thickness and width, whereby practically 'U-shaped channels with lateral flanges are formed, extending in opposite directions from the channels.

The grid 14 is made of a suitable rod material such as a solid cylindrical rod material, manufactured and converted into a zig-zag configuration in the manner shown, wherein alternating peaks or corners with the outer surfaces of the Parts 10 and 12 are connected by welding. It understands that any other material can be used for a grid formation or conventional type of attachment.

Since the upper and lower parts 10 and 12 and the grille 14 may have conventional embodiment, there is no further detailed description.

According to the essential inventive feature is a continuous straight rod 16 attached to the grid 14 in any conventional manner, such as by welding or the like.

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the same extends parallel to the parts 10 and 12 over the entire length of the cross member. The rod 16 is adjacent to the upper summit of the bar lattice, see Figure 1, and is in a predetermined distance ratio, whereby a continuous horizontal surface is formed, which serves to carry a plurality of mold carriers, as shown in cross section in FIG. 1 by the reference numeral 18, Since the cross member according to the invention is intended for a horizontal arrangement in the final assembly, the need Mold carrier 18 does not have to be physically attached to the rod 16, since the same is only there by the action of gravity can rest.

Referring specifically to Figure 2, there are three according to the invention Cross beams arranged in a parallel spaced relationship to one another, the relative positions in the final Composition of a typical construction are shown, before the concrete is applied. You can see that the Rods 18 of each pair located between the rod 16 and a particular upper peak of the grid 14 extend in opposite directions towards the respective rods 16 of the adjacent cross beams. In this way it will a series of continuous, horizontal surfaces between the adjacent cross members formed.

In order to pick up the concrete in the course of the later construction process, a number of forms 2O of conventional type, such as plywood panels, disposed on a plurality of wooden spacers 22 which in turn rest on the upper surfaces of the support bars 18 rest and extend across the space between the adjacent cross members. The shapes can be parallel to end-to-end the cross members are arranged.

3 shows two of the cross members according to FIG 2 along with a portion of a concrete slab 30 which has been formed by placing concrete on the arrangement according to FIG. 2 The parallel

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Cross members are supported in a conventional manner, such as welding the same relative to a plurality of trusses (not shown), which in turn form on suitable pillars a composite arrangement are arranged. The concrete is brought over the continuous surface formed by the molds 20 and build up to a level above the top surface of the top ones bearing the load Parts 10 extends to form the plate 30.

It goes without saying that other components are also related can be provided with the system described here for reinforcing the concrete slab 30.

After the plate 30 has been formed and tied off, you can the support bars 18 are removed and then the molds 20 can be easily removed from the bottom of the panel.

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Claims (5)

Claims 1J crossbeam for construction work , characterized in that it has a pair of elongated load-bearing parts (10,12), a steel band (14) which extends between the load-bearing parts (10,12) while supporting them in a parallel spaced relationship and having an arrangement which is connected to the band (14) forming a surface which extends parallel to the load receiving portions (10,12) for the purpose of supporting a plurality of mold carrier parts (2O) transverse side to which Cross beams extend. 2. Cross member according to claim 1, characterized in that that the grid (14) is in the form of a continuous rod (14) which is deformed into a zigzag pattern below Forming a plurality of alternating vertical and inverted V-shaped sections with their peaks connected with the corresponding parts (10,12). 3. Cross member according to claim 2, characterized in that that the arrangement has a rod (16) which extends parallel to the load-absorbing parts (10,12) and connected to the rod adjacent to the bipods of the vertical sections. 4. Cross member according to claim 2, characterized in that that the support parts are in the form of support rods (16) and that formed between the rod (16) and the peaks Space is such that zv / ei support rods (18) between the rod (16) and each peak in engagement with the rod and the continuous rod. 409824/0687 - 7 - 5. Cross member for use in a building system that is part of the composite between concrete slabs and trusses or cross members works, characterized by a pair of elongated the load-absorbing parts (10, 12), a steel band "(14), that between the load-absorbing parts (10, 12) while supporting the same in a parallel spaced relationship extends, and a rod (16) which extends parallel to the parts (10,12) and with the band (14) under formation a surface for the purpose of supporting a plurality of mold support parts (20) is connected, which are transverse to the cross member extend. 409824 / QS87 Blank page