SU1760041A1 - Metal thin-walled latticed structure - Google Patents

Abstract

Usage: in the construction of metal thin-walled lattice structures with tubular by themselves. SUMMARY OF THE INVENTION: The lattice structure includes a triangular tubular section, each of which is oriented one of the faces outwards, and an edge opposite to it — inwards, and a grid of elements of circular cross section rigidly attached to the latter. In this case, the lattice can be made with flattened ends in the plane of the structure and / or from steel curved elements of V- or W-shaped outline. 2 hp f-ly, 6 ill.

Description

The invention relates to the construction, in particular, to long-length metal construction lattice structures with tubular structures themselves, and can be used in the manufacture of molds, girders, columns, arches, etc.

It is known that tubular building structures are the most economical, because metal in the cross section of the elements is located in the best way. However, their use, and especially the most economical extra thin-walled pipes, is hampered by the lack of satisfactory technical solutions for the node connections of the lattice elements themselves in lattice structures. Therefore, the question of improving the nodal connections of such structures is of particular relevance.

A known metal truss in which the tubular square profile is ca

it is oriented with a rib inward and braces are welded to this rib by means of chamfers. With this solution of the lattice adjoining, the work of the unit improves, however, owing to the adopted cross sections and orientation in sa, it is impossible to rely the elements of the roof on the truss. It is imperative to install the runs, and for them to lean on the truss from the truss - tables and stands, which complicates the design.

Closest to the proposed and achieved result is a metal thin-walled truss with themselves made of triangular cross-section tubes and a lattice rigidly attached to them.

This technical solution has all the drawbacks of the known box-shaped truss solutions by themselves. The main one is the low strength of the connection of the elements of the lattice with themselves when used VI

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thin-walled pipes due to the danger of pushing the wall through ca, which requires an increase in wall thickness. In addition, the joints are difficult to manufacture due to the need to make an oblique cut of the lattice elements and perform welding at different positions of the seams in space.

The aim of the invention is to reduce the metal consumption of the structure by preventing the bursting of webs in the knots. To this end, according to the invention, in a building metal thin-walled lattice structure containing a triangular tubular section and a lattice rigidly attached to them, the invention is each oriented with one of the faces outwards, and with an edge opposite to it inwards, and a lattice to the latter.

In addition, in order to reduce the labor intensity of manufacturing, the grid, when manufactured from round or rectangular pipes, is made with flattened ends of the construction plane.

Also, to reduce the labor intensity of manufacturing, the lattice is made of bar metal in the form of curved elements of a V or W shape,

Figure 1 shows a truss assembly with coating elements; FIG. 2 is a view A of FIG. one; in FIG. 3, the knot of fastening the path of the suspended crane to the proposed construction; figure 4 - view B in fig.Z; figure 5 is a variant of the site of the farm with bar grating; figure 6 is a view In figure 5.

As a specific example of the invention, the truss is shown with 1 and bracings 2 themselves. A triangular tubular section is made of sa and one of the faces 3 is facing outwards and one of the edges 4 inward. The bracing 2 is made of round pipes, which are welded to the inner edges 4 with their ends flattened in the plane of the truss 4. On the outer edge 3 of the upper floor they are supported flooring 5 or roofing slabs (not shown).

With this solution, the thin wall along the sa will not be forced, since the force from the node will be distributed on two sloping faces along ca. Ultimately, the metal consumption of the structure is reduced,

If there are overhead cranes in the building, the paths of the latter are fastened directly to the outer edge of the lower plane using special plates without making special tables. The force from the overhead cranes is transmitted along inclined edges to the flattened ends of the grid elements. The thin wall does not require reinforcement.

Depending on the specific conditions, the bracing may be made not round, but rectangular or square tubular, as well as open sections.

For lightweight trusses, the grille can be made of steel curved rods of V- or W-shaped outline. The lattice elements 6 are centered on the axis along ca. With

In this case, in the places adjacent to the lattice to the cus, straight lines are formed, with which the lattice is welded to the edge 4 of the ca.

In all these embodiments, the fabrication of the structure does not cause difficulties inherent in the prototype: the cuts of the lattice elements are only straight, the seams are made in the lower position.

The described construction can be effectively used in the manufacture of light trusses, girders, as well as frame and arch elements of light-weight building frames. No overlap joints, minimal and easily accessible surface for painting despite application

thin-walled elements, provide the design also high corrosion resistance.

Claims (3)

1. The construction of a metal thin-wall lattice structure, comprising a triangular tubular section and a lattice rigidly attached to them, which means that in order to reduce metal consumption by preventing pushing the owls at the nodes, each one with the one side facing outwards, and the edge opposite to it facing inwards, and the lattice is fixed to the last. 2. The construction according to claim 1, characterized in that, in order to reduce the labor intensity of manufacturing, the grille is made with its ends flattened in the plane of the construction. 3. The structure of claim 1, wherein the lattice is designed so that, in order to reduce the labor intensity of manufacture, the lattice is made of HJ steel curved elements of a V or W shape. Type A figure 1  XLi i t i i f f i  tg m rm tt Schig.3 FIG. 2 g / Schig4 Figz 886 F Fig 6