RU156947U1 - SUPPORT ASSEMBLY OF TRIANGULAR RAILFORMS - Google Patents

Abstract

The supporting node of the triangular truss truss, including the upper belt and the horizontal lower belt, gussets, self-tapping screws, characterized in that the lower and upper belts are made of single thin-walled steel sections of the channel section and are connected by a gusset using self-tapping screws, and at the point of support they are bolted to two support racks made of rolling channels, under the lower belt mounted support table, reinforced with a stiffener.

Description

The utility model relates to the field of construction, in particular to the supporting unit of the truss triangular truss, made of single thin-walled steel profiles of the channel section, supported from above on a column of rolled I-beams.

Known support node of the truss truss with a span of 18, 24 and 30 m with the use of closed bent-welded profiles of rectangular cross-section type "YOUNG". The farm is supported by the upper belt through the gusset on top of the pericarp. The support of the truss on the column is hinged. The truss truss is designed gable with parallel belts with a slope of 0.015 and a uniform triangular lattice with descending braces. The columns are designed from wide-shelf I-beams. All factory connections of elements of roof trusses and columns are welded (see series 1.460.3-14 “Steel structures of coatings for industrial buildings of the“ MOLODECHNO ”type, VNIKTIstalkonstruktsiya, l. 56, unit 13).

There is also a solution for the unit with lateral fastening of the upper belt of the truss to the column. The support of the truss is carried out through the support table of complex configuration. Rafter trusses are designed gable with a slope of the upper belt of 10%, horizontal lower belt and a uniform triangular lattice with descending support braces. All factory connections of truss elements are welded, (see series 1.460.3-23.98 “Steel structures of coatings for industrial buildings with a roof slope of 10%”, issue 1, PI Lenproektstalkonstruktsiya OJSC, 2000, l. 40, unit 10).

The closest analogue is the support node of a channel farm, containing an ascending upper belt of two channels or C-shaped profiles, oriented by walls to each other and connected to the slats, with a lower belt of two channels between the channels of the ascending upper belt and connected to bolts or welding, according to the invention, is made on two trapezoidal sheet shapes or wedge-shaped volumetric shapes in the form of a bent channel of variable height, attached by vertical planes to the shelf U-sections of the lower chord and hardcore in the wall or bottom flange of the upper zone U-sections (see. Patent RU 2520679 C1, E04C 3/11, E04B 1/58, publ. 06.27.2013, Bul. №18).

However, this node has a low bearing capacity when used in a triangular farm belts of paired channels.

Utility Model Task:

- increase the bearing capacity of the farm,

- reducing the weight and metal consumption of the structure and the complexity of the installation.

The result is achieved as follows:

1. The support of the truss truss on the column is carried out from above, through the base plate.

2. The transfer of forces from the lower and upper zones takes place through the supporting posts - rolling channels, bolted to both shelves of the channels of the lower and upper zones.

3. The function of the supporting table is adopted by a horizontally oriented rolling channel reinforced in the middle with a stiffener.

The essence of the utility model lies in the fact that the support node of the triangular truss truss, including the upper belt and the horizontal lower belt, chamfers, self-tapping screws, while the lower and upper belts are made of single thin-walled steel sections of the channel section and are connected by a gusset using self-tapping screws, and in the place of support they are bolted to two support posts made of rolling channels, under the lower belt there is a support table reinforced with a stiffener.

The technical result consists in the fact that this solution allows you to evenly transfer the load from the truss to the column, to completely eliminate the eccentricity by installing a support column and reduce the forces in the truss belts, thereby increasing the bearing capacity of the structure.

The presence of a supporting table and stiffeners attached by welds to the supporting posts and located under the lower truss belt reduces shear loads on the connecting bolts.

The utility model is illustrated by drawings:

FIG. 1 is a diagram of a truss truss;

FIG. 2 - node supporting the truss truss on a column made of a rolling I-beam;

FIG. 3 - section A-A along the node supporting the truss on the column;

FIG. 4 - section B-B on the node supporting the truss on the column;

FIG. 5 - section C-C (to figure 3);

FIG. 6 - section D-D. The connection of the upper and lower zones;

FIG. 7 - section E-E. Cross section of the upper and lower zones of the truss truss.

The support unit contains an ascending upper belt 1 and a horizontal lower belt 2 of a truss truss made of thin-walled steel cold-formed channel sections of a cross-section. The upper belt 1 and the lower belt 2 are connected at the ends of the truss by a gusset 3, which is a sheet of steel sheet, attached to the truss belts with self-tapping screws 4. At the point of support on the column, the upper belt 1 and the lower belt 2 are interconnected on bolts 5 by two rolling channels - supporting posts 6. The role of the supporting table is played by the rolling channel 7 located under the lower girdle 2 of the truss frame and between the channels - supporting posts 6. The wall of the channel of the supporting table 7 is connected to the wall of the lower girdle 2 of the truss by bolts 5. О orny table 7 strengthened rib 8 connected to the support table 7 and channels - supporting legs 6 factory welded seams. Channel - supporting posts 6 and stiffener 8 are welded by the factory seam to the supporting plate 9. The head of the column 10 is connected to the supporting plate 9 by an assembly weld and four bolts 5.

The support unit operates as follows: the support reaction from the column is transmitted through the head 10 to the support plate 9. Channel - support posts 6 and stiffener 8 take this load and transfer it to the support table 7 and the upper 1 and lower 2 truss belts.

This support unit is most rationally used in industrial, industrial, warehouse and other buildings, in the coverings of which rafters are used with spans from 18 m to 24 m.

Claims (1)

The supporting node of the triangular truss truss, including the upper belt and the horizontal lower belt, gussets, self-tapping screws, characterized in that the lower and upper belts are made of single thin-walled steel sections of the channel section and are connected by a gusset using self-tapping screws, and at the point of support they are bolted to two support racks made of rolling channels, under the lower belt mounted support table, reinforced with a stiffener.

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