RU2429330C2 - Metal-wood beam of double-t section - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: metal-wood beam of double-T section comprises a metal wavy corrugated wall, upper and lower shelves, made of wood. The wall is made with cut-in location pieces and stops arranged at both sides of the wall. The wall is made with the wave height equal to at least ј of the wave pitch. The cut-in elements are made with hooks and are arranged at both sides of the wall in a staggered order. Stops are made as yokes with bends. Each of yokes is installed with the possibility of beam shelf coverage. Each of bends is made as following the wall profile. One of yoke bends is made with a counter-pressing shelf.

EFFECT: design simplicity, strength, lightness, stability and reliability in operation.

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Description

The invention relates to the field of construction, namely to support beams, and can be used as a support beam of formwork for concreting monolithic floors, as well as beams, racks and other building structures, that is, beams of this type can be used in all the same projects as usual: wooden, metal, T-and I-beams, beams with virtually no structural restrictions.

Known beam formwork floors according to the patent of the Russian Federation No. 2256756, class. E04G 11/50, 2005, containing a stand formed by two symmetrically arranged bent profiles, rigidly connected to each other by walls, forming a closed longitudinal channel, in the middle part of which cups located with their bottoms facing each other are stamped in shelves, formed by the ends of the bent profiles bent outward in the form of trays for placing a wooden beam located on both sides of the rack with the bottoms facing each other, while the walls of the trays and the wooden beam are made with through holes Voith to accommodate tightening sleeves with flared edges, the trays are formed on each curved profile and are made equal in magnitude, the edges of the trays are arranged in the height dimensions of the rack, and the through-hole to accommodate tightening bushes are made in the walls of the trays through the column.

The disadvantage of the beam is that it contains many components that complicate its design, it is difficult to manufacture.

Known metal beam according to the patent of the Russian Federation No. 2120005, class. Е04С 3/292, Е04G 11/48, 1998, adopted by the applicant for the prototype. It contains a metal core in the form of an I-profile, enclosed in wooden plates, tightened by fasteners, the metal core of the I-profile is made of channels rigidly connected to each other, one of which forms a wall, and the other two - shelf profiles, while the wooden panels are formed by vertical walls having the shape of a channel with bent ends of the shelves and the sleeve at the joints of the walls and shelves, and external T-shaped beds, interconnected by thermal adhesive seams located at an angle from 0 to 60 degrees to the horizontal, and gaps filled with expansion joints are formed between the profile shelves and the planes of the outer wooden beds facing them.

The beam has a complex structure, saturated with details, and hence the complex manufacturing technology, which increases its weight and labor costs for its manufacture.

An object of the invention is to create a beam that is simple in design and not difficult to manufacture, while at the same time leaving it strong, light, stable and reliable in operation.

The problem is solved in that in the proposed solution, the wavy corrugated wall is made with a wave height (h) equal to at least 1/4 of the wave step (L), and the mortise installation elements are made with hooks and placed on both sides of the wavy corrugated wall in a checkerboard pattern , the stops are made in the form of clamps with bends, each of the clamps is installed with the possibility of covering the beam rails, and each of its bends is made repeating the profile of a wave-shaped corrugated wall, and one of the bends of the clamp is made with a counter davlivayuschey shelf.

In Fig.1 shows a metal-wooden beam assembly, General view;

figure 2 - scan of the metal wall with mortise installation elements and stops;

figure 3 is a section a-a in figure 1, options for using one wave-shaped corrugated wall and double, the walls of which are fastened by the connection;

figure 4 - options for mortise installation elements;

figure 5 - the use of an emphasis made in the form of a clamp for fastening with a shelf one wave-shaped corrugated wall and double;

figure 6 is a section bB in figure 5;

Fig.7 - clamp.

The metal-wooden beam in cross section is an I-beam and consists of the upper 1 and lower 2 shelves made of wood, for example of timber, and a vertical rack, which is placed between shelves 1 and 2 and is rigidly connected to them.

The vertical pillar includes a metal wall 3, which is made in the form of at least one wavy corrugated wall. But it is possible to perform a metal wall 3 of two or more interconnected undulating corrugated walls. Moreover, in this case, waves of undulating corrugated walls can be arranged both parallel to each other and towards each other, fastening them together by connection 4. The wave height (h) of the undulating corrugated wall is at least 1/4 of the wave step (L), which also provides sufficient rigidity of the wall 3.

Such profiled walls, made, for example, in the form of a wavy corrugated wall, are more resistant to long-term static load. In addition to the benefits derived from the production technology, the wave-like (made according to circular curves), for example a sinusoidal rib, has an advantage over the direct one due to the elimination of local deformation inherent to flat plates.

The metal wall 3 is equipped with mortise installation elements 5 and stops 6.

Mortise installation elements 5 are made with hooks 7 and placed on both sides of the metal wall 3 in a checkerboard pattern. Elements 5 can be made at a sharp and slightly pointed, blunt, mortise angle, depending on the type of wood used, intended for the manufacture of wooden shelves of the beam. The hooks 7, made on the mortise mounting elements 5, are teeth that are made with a reverse angle, facilitating easy cutting into the shelves 1 and 2 when installing the metal wall 3 and preventing the exit of the metal wall 3 from the shelves 1 and 2.

The stops 6 are placed on the metal wall 3 between the mortise mounting elements 5 and are made on both sides in a checkerboard pattern. They are two parallel plates bent 90 degrees from the metal wall 3, one of which is bent to one side and the other to the opposite. In each plane of the stop 6, holes 8 are made for installing fasteners 9 in them, for example, self-tapping screws.

Also, the stops can be made in the form of clamps 10 with bends. They are installed to increase the bearing capacity of the beam along the upper 1 and lower 2 shelves of the beam. The bends of the clamp can be made repeating the wave-like profile of the wall 3, and one of the bends of the clamp is made with an anti-pressure shelf 11. The clamps 10 are installed separately from each other with a certain step and fasten the wave-shaped corrugated wall 3 with the shelves 1 and 2 by means of a fastener 12.

A metal-wooden beam of an I-section is made and assembled as follows.

On a metal sheet taken for the manufacture of the metal wall 3, a metal wall 3 is scanned by applying mortise installation elements 5 with hooks 7 and stops 6 with holes 8. Then, the metal sheet with a developed metal wall scan 3 is placed in a press, where stamp it. A metal wall 3 is removed from under the press in the form of a scan. Then, in the stops 6, holes 8 are made or they can be made on the press at the same time with a stamping reamer.

After that, the obtained scan is rolled with rollers and a wave-shaped corrugated wall is obtained. Then bend the plane of the stops 6 with the holes 8 90 degrees to the plane of the metal wall 3.

The finished metal wall 3 is connected to the shelves 1 and 2 of the beam. To do this, take already prepared wooden bars intended for shelves 1 and 2. The metal wall 3 is pressed between the shelves 1 and 2. First, they are mounted on the lower shelf 2, cutting into the body of the shelf 2 with mortise mounting elements 5 to the full height until the contact surfaces of the stops 6 with the surface of the shelf 2 and fixing the wall 3 to the lower shelf 2 by installing fasteners 9, such as screws, in the holes 8. It is possible to fasten with bolts. In this case, the specified inverse angle of the hooks 7 of the mortise mounting elements 5 provides the rigidity of the connection of the metal wall 3 with the lower shelf 2.

Then connect the metal wall 3 with the upper shelf 1, for which the metal wall 3 with the lower shelf 2 already placed is pressed with mortise installation elements 5 into the body of the shelf 1 to their entire height until the surfaces of the stops 6 contact the surface of the shelf 1 and fix the wall 3 to the upper shelf 1, for example, with self-tapping screws through holes 8. If necessary, to increase the load-bearing capacity of the beam, clamps 10 are additionally installed. The beam is assembled and ready for use, for example, in formwork.

In the case of a metal beam with two wave-shaped corrugated walls, they are fastened together or by a joint 4, or clamps 10. Moreover, waves of wave-like walls are set either parallel to each other or towards each other.

The use of the proposed technical solution allowed us to create a beam that is light, simple in design, and simple to manufacture, while maintaining it strong, stable and reliable in operation.

Racks made in the form of a wavy corrugated wall are more resistant to static load. In addition to the benefits derived from production technology, the wave-shaped corrugated rib has an advantage over the direct one due to the elimination of local deformation inherent in flat plates.

Thanks to the profiled edge of the vertical wall, the structure effectively dampens bending loads. Under static load conditions, the beam is calculated according to a scheme in which bending moments and normal forces are transmitted only through the side shelves, and the transverse forces are distributed only through the diagonals and verticals of the beam - in this case, through a wave-shaped corrugated wall.

Beams of this type can be used in all the same projects as ordinary ones: wooden, metal-wooden, T-beams and I-beams, beams with virtually no structural restrictions.

Claims (1)

An I-section metal-wooden beam containing a metal wave-shaped corrugated wall with mortise installation elements and stops placed on both sides of the wave-shaped corrugated wall, upper and lower shelves made of wood, characterized in that the wave-shaped corrugated wall is made with a wave height of at least 1 / 4 wave steps, and mortise installation elements are made with hooks and placed on both sides of the wave-shaped corrugated wall in a checkerboard pattern, the stops are made in the form whirlpools with limb, each of clamps mounted to the coverage beam flange, and each of its limb configured repeating wavy corrugated wall profile, wherein one limb of the clamp is configured protivoprodavlivayuschey shelf.

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