FI11529Z1 - Hollow core slab support - Google Patents

Abstract

The hollow plate bracket (1), which comprises a horizontal support plate (2) for supporting the end of the hollow plate, a back plate (4) directed upwards from the horizontal support plate (2), end plates (5) arranged at the ends of the hollow plate bracket (1), and supports protruding from the ends of the hollow plate bracket (1) (6) for supporting the hollow tile bracket (1) to the hollow tiles (3b), characterized in that the hollow tile bracket (1) comprises a front plate (7) directed upwards from the support plate (2), which is arranged at a distance from the back plate (4), the front plate (7) and the top plate (8) fitted between the back plate (4), which front plate (7), top plate (8), back plate (4) and support plate (2) form a housing-like space (10), in which three support rods (11a, 11b, 11c) are arranged , of which the support rod (11a) is attached to the corner of the front plate (7) and the top plate (8), the second support rod (11b) to the front plate (7) in the lower part and the third support rod (11c) is detached in space (10) or attached to the back plate (4).

Description

HOLLOW TILE BRACKET

The object of this invention is a bracket according to protection claim 1 for supporting the end of a hollow plate.

This invention concerns a support for a concrete hollow slab, typically made of steel. With the structure according to the invention, the end of the hollow tile that ends at the edge of the level opening can be supported and hung on adjacent hollow tiles or other structures so that the bracket is completely level with the hollow tile.

Prefabricated hollow tiles are used in the load-bearing intermediate floor and upper and lower floors of houses with precast concrete structures. Hollow tiles are usually supported on top of level beams and walls. When there are large openings in the hollow tile plane for stairs or other penetrations, the end of the hollow tile ends at the edge of the opening, where there is usually no beam or wall to support and support the end of the hollow tile.

Because of this, the end of the hollow tile must be supported with a separate bracket.

In the utility model FI 4119, a hollow tile bracket is described, which is supported on the edges of adjacent hollow tiles and on which the end of the hollow tile rests. This — prior art bracket is made from a relatively thick (about 10-20 mm) steel plate. Due to the weight of the bracket, it must be installed in place using a crane. The bracket is made from an open L-profile-shaped structure, which in terms of strength is a very unfavorable shape for this purpose.

N there. The material of the steel part is very unfavorably used in terms of strength,

S 25, where the weight of the steel part is considerable and it is therefore expensive to manufacture, and the weight of the steel part brings additional costs during installation. a

E In the utility model FI 7519, a grid-structured hollow tile fabric is described, which is light in structure, but labor-intensive to manufacture, in which case manufacturing costs increase significantly. The > problem of this lattice structure bracket is the bracket's inapplicability for series production > for varying opening widths at the hollow slab level. The openings are usually not multiples of the width of the hollow tile, but the width of the opening varies arbitrarily.

That's why the bracket solution has to adapt to the changing widths of the opening without any problems.

The purpose of this invention is to provide an improved support for hollow tiles, which can reduce the problem described above.

The goal according to the invention is achieved with a bracket according to protection claim 1, which comprises a horizontal support plate for supporting the end of the hollow tile, a back plate directed upwards from the horizontal support plate, end plates arranged at the ends of the hollow tile bracket and supports protruding from the ends of the hollow tile bracket to support the hollow tile bracket to the hollow tiles. In addition, the hollow plate bracket comprises a front plate directed upwards from the support plate, which is arranged at a distance from the back plate, and a top plate fitted between the front plate and the back plate. The front plate, top plate, back plate and support plate form a housing-like space in which one or more support rods are arranged. — The invention achieves considerable advantages.

With the help of the hollow tile bracket according to the invention, the problems related to the manufacturing cost of the solution according to the known technology and serial production are reduced. The weight of the bracket according to one application form of the invention is tried to be minimized and the manufacture of the bracket is made simple and therefore inexpensive. At the same time, the structure of the bracket is made in such a way that it is well suited for serial production in machine shop manufacturing, and the length of the bracket can be easily adjusted for changing plane opening widths. The bracket is thus

N as a light structure and easy to manufacture, economical and it enables

S 25 —easy adjustability of the bracket length. > 3 The plates of the hollow plate bracket according to one application form of the invention

The thicknesses of E are between 4-8 mm due to the strength-technically optimal housing structure 2, which significantly reduces the weight of the structure and brings cost savings. Despite this, the invention achieves the same load carrying capacity of the end of the hollow plate as with structures according to known technology. In addition, with this bracket, it is possible to support wider plane openings than with solutions according to known technology, because the closed housing structure is optical for this purpose.

maalis and a similar housing structure has not been shown in the known technology in the bracket solutions for the end of the hollow plate.

The hollow slab bracket must work in the hollow slab plane in three different construction-technical load situations. During the installation phase, the bracket only supports the own weight of the hollow tile, so that the hollow tile level can be installed without separate installation supports. In the next step, the inside of the bracket housing and the space between the hollow slab and the bracket are filled with concrete. After the concrete hardens, the bracket starts working together with the concrete and the hollow tiles in a joint effect, whereby the bracket transfers the weight of the hollow tile and all its payloads to the adjacent hollow tiles as well. The third use situation is a fire situation. In this case, the steel outer surface of the bracket is exposed to fire, in which case it is out of use and unable to carry the load. The bracket must also be able to transfer the load of the hollow slabs in this third dimensioning situation — to the adjacent hollow slabs, when part of the structure of the bracket is out of action in a fire.

In the solution according to one application form of the invention, the shape of the support of the hollow plate is made into a case-like shape, which is supplemented by one or more support rods welded to the front plate of the case and a separate support rod installed inside the case, for example brushed steel. In the installation situation, the entire outer structure of the housing and the support rods welded to the housing act as a load-bearing structure. The concrete casting has not yet been done and the bracket is therefore

K das steel structure. In the next step, when the joint castings of the hollow slab are made

S 25, the inside and outside of the housing are filled with concrete, so that they act together with the housing as a load-bearing composite structure for all the loads of the operating situation 3. In the event of a fire, the outer surface and bottom of the housing no longer function as load-bearing

E as a structure, because their temperature rises too high. In the event of a fire, the front plate and the top plate of the 2 casing and the supporting rod welded to the casing and the separate supporting rods s 30 — function as a load-bearing structure and the bracket can transfer the loads of the hollow tiles to the adjacent tiles in the event of a fire. The bracket therefore does not need separate fire protection, which is also one of the basic requirements for a bracket solution.

The bracket is supported to adjacent hollow tiles or other structures with connection solutions according to known technology, which can be slightly modified as needed.

The strength-based inventiveness of the hollow tile bracket according to one application form of the invention consists of a housing structure made of relatively thin (4-8 mm) steel plates, which carries the loads from the hollow tile. The cost-effectiveness of the housing structure is based on its strength properties and ability to transfer a significant torque, which solutions according to the known technology do not do. In addition, the housing is reinforced with one or more support rods, for example brushed steel, which also act as a load-bearing structure in a fire situation when the plates on the visible outer surface of the housing are out of use in a fire. The concrete poured inside the housing forms a structure that protects the front plate and support bar in the event of a fire, so that separate fire protection is not needed. In addition, the concrete acts as a load-bearing joint structure together with the steel parts of the bracket. In terms of strength, the bracket works in three different dimensioning situations.

The manufacturing technical inventiveness of the hollow tile bracket according to one application form of the invention is based on a solution where the plates forming the casing can be bent into the shape of angle steel and then welded together. The case can be manufactured as a long structure, in which case the necessary bracket of suitable length can be sawn from it, and the manufacture is thus simplified, because

The length of the N bracket can be freely adjusted according to the orders. Casing mod-

S 25 also provides the necessary casting mold and visible surface for the bracket. The front plate of the housing 5 is typically placed in a slightly slanted position, and 3 concrete feeding openings are made into it, which can be used to cast the inside of the housing and to

E cast concrete can be made to function together with the housing as a composite structure. In addition, there are air vent holes on the top surface of the casing 2, which can be used to reliably check that the casing is filled with s 30 — concrete casting.

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> With the invention, compared to one bracket according to known technology, the weight can be reduced significantly, and compared to the solution according to another known technology, manufacturing costs can be reduced significantly.

The invention is described in more detail in the following by means of examples by referring to the accompanying drawings, in which figure 5 shows a hollow tile bracket according to one application form of the invention, which is supported at the ends by hollow tiles and on which two hollow tiles are supported, figure 2 shows the hollow tile bracket of figure 1 viewed from the front, figure 3 shows the hollow plate bracket of FIG. 1 as viewed from above, and FIG. 4 shows a cross-section of the hollow plate bracket of FIG. 1. — The hollow tile bracket 1 shown in the drawings is used to support the end of the hollow tile 3a bordering the opening or the ends of the hollow tiles 3a to the adjacent hollow tiles 3b or to another support structure. The hollow plate bracket 1 comprises a horizontal support plate 2 for supporting the head of the supported hollow plate 3a and a vertical back plate 4 that extends upwards from the horizontal support plate 2. The vertical back plate 4 extends straight up from the horizontal support plate 2. The horizontal support plate 2 and the vertical back plate 4 form an L in cross section -shaped profile. The horizontal support plate 2 and the vertical back plate 4 are made from the same plate by bending.

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S 25 In addition, the hollow plate bracket 1 comprises a front plate 7 extending diagonally upwards from the horizontal support plate 2 5, which is arranged at a distance from the back plate 3 4. The front plate 7 is attached at its bottom edge to the support plate 2. The front plate 7 leads towards

E back plate 4 going up. Between the upper edge of the front plate 7 and the back plate 4, there is a top plate 8 fitted 2, which is attached to the back plate 4. The top plate 8 is attached to the back 30 — belt 4 below its upper edge, at a distance from the upper edge of the back plate 4. > In this case, the part of the back plate 4 above the top plate 8 protrudes upwards from the attachment point of the top plate 8 and forms a projection that forms a casting mold for concrete casting. The upper plate 8 is horizontal. Top plate 8 and front plate 7 are made from the same plate by bending. Front plate 7, top plate 8, back plate 4 and/or support plate 2 form a housing-like space 10, which is filled with concrete after mounting the bracket 1. The front plate / has concrete supply openings 9 for feeding concrete into the space 10. The top plate 8 has air exhaust openings 13 for removing air from the space 10.

In addition, the front plate / has a torsion steel opening 14 from which the torsion steel 15 is placed inside the housing 10. The opening 14 is smaller than the concrete supply opening 9. There can be one or more openings 14 and torsion bars 15. The thickness of the front plate 7, top plate 8, back plate 4 and/or support plate 2 is 4-8 mm.

In addition, the hollow tile bracket 1 comprises end plates 5 arranged at the ends of the bracket 1 and supports 6 protruding from the ends of the bracket 1 to support the bracket 1 to the hollow tiles 3b at its ends. The supports 6 comprise fixing holes 12, through which screws can be fitted to fix the bracket 1 to the hollow plate 3b.

The end plate 5 and the support 6 protruding from it are made from the same plate by bending.

The end plates 5 are attached by welding to the support plate 2 and the back plate 4.

One or more support bars 11a, 11b, 11c, for example brush steel, are arranged in the space 10 between the front plate 7 and the back plate 4, i.e. the housing. The support rods are fitted lengthwise between the end plates 5. In the form of application according to the drawings, there are three support rods. The first support bar 11a is attached to the corner between the front plate 7 and the top plate 8. The second support bar 11b is attached to the lower part of the front plate 7, for example below the concrete supply opening. The third support rod 11c is detached inside the housing 10. An alternative barrier, the third support bar 11c is attached to the back plate 4, for example at the same height as the second support bar 11b.

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S 25 In addition, a torsion bar 15 is arranged in the bracket 1, which is a brush bar bent into a rectangular shape with a structure of 5, the purpose of which is to bind the torsion force coming from the eccentric support of the end of the hollow slab 3 to the bracket 1.

E ment. The end of the torsion steel 15 is threaded at the seam 3 of the hollow slab 2 through the opening 14 into the casing 10 before pouring the concrete. s 30 > Bracket 1 of the hollow plate is installed as follows. The bracket 1 is supported > between two hollow tiles 3b by fitting the supports 6 against the top surface of the hollow tiles. The bracket 1 is fixed in place with screws that fit through the fixing holes 12. The end of the supporting hollow tile or the ends of the hollow tiles are placed horizontally

on the support plate 2 of the cassowary in front of the front plate 7. After this, the space 10 between the back plate 4, the front plate 7 and the top plate 8 is filled with concrete through the concrete supply openings 9. The space between the end of the hollow slab 3a to be supported and the front plate 7 and the space above the top plate 8 are also filled with concrete.

In the event of a fire, bracket 1 works in such a way that support plate 2 and back plate 4 are no longer load-bearing parts of the structure. The supporting structure of the bracket 1 is then formed by the front plate 7 and the top plate 8 and the support rod or rods 11a, 11b, 11c arranged inside the housing and the concrete poured around them inside and outside the housing 10. All the structures stay attached to the hollow plate 3a with the help of torsion steel 15, which attaches to the seam 16 between the hollow plates 3a.

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Claims (6)

PROTECTION REQUIREMENTS 1. A heel deck shifter (1) with a horizontal support plate (2) to raise one end of a heel deck, a rear plate (4) in the upward direction from the horizontal plate (2), end plates (5) in the heel deck shifter (1) and from the ends of the heel deck shift (1) projecting support (6) to support the heel deck shift (1) against the heel deck (3b), characterized in that the heel deck shift (1) has a front plate (7) in the upward direction from the support plate ( 2) and at a distance from the rear plate (4), an upper plate (8) between the front plate (7) and the rear plate (4), which front plate (7), upper plate (8), rear plate (4) and support plate (2) form a joint-shaped space (10) in which three support rods (11a, 11b, 11c) are arranged, of which the first support rod (11a) is attached to the front plate (7) and the upper plate (8) corner, the second support rod (11b) is attached to the lower part of the front plate (7) and the third support rod (11c) is loose in the space (10) or attached to the rear plate (4). 2. Hard deck interchange (1) according to protection requirement 1, characterized in that the front plate (7) is provided with concrete feed openings (9) to feed concrete into the space (10) and the upper plate (8) is provided with air outlet openings nings (13) to remove air from the space (10). 3. Hard tire replacement (1) according to any of the preceding protection requirements, characterized in that the upper plate (8) is attached to the rear plate (4), in a position lower than its upper edge, and the rear plate (4) pushes up from the point where the upper plate (8) is attached. 4. Solid tire replacement (1) according to any of the preceding protection requirements, characterized in that the support plate (2) and the rear plate (4) are made of the same plate by bending. 5. Solid tire replacement (1) according to one of the preceding protection requirements, characterized in that the front plate (7) and the upper plate (8) are made of the same plate by bending. 6. A heel tire changeover (1) according to any of the preceding protection requirements which is designed to function in the event of a fire in a building, characterized in that the load-bearing structure of the changeover (1) consists of the construction that the front plate (7) and the upper plate (8) and the support bar or support bars (11a, 11b, 11c) in the joint-shaped space (10) form, which construction is set up to be stuck in a concrete cast joint (16) between retaining deck (3a) which is supported with the help of the concrete that is cast into the articular space (10) and using a torque iron (15).