GB2078819A

GB2078819A - Cavity-wall arch support

Info

Publication number: GB2078819A
Application number: GB8118991A
Authority: GB
Original assignee: Catnic Components Ltd
Current assignee: Catnic Components Ltd
Priority date: 1980-06-24
Filing date: 1981-06-19
Publication date: 1982-01-13
Also published as: GB2078819B

Abstract

The support comprises retaining means 1 having part 3 to be secured to an inner skin 18 of the wall and part 6, and a lintel 12 with limb 11 to be received in seating part 6, a plate or part 15 for supporting bricks 21 and a rigid part 13, 14 connecting limb 11 and plate or part 15. The retaining means has a part 9 and lug 10 which support the lintel against torsion under imposed loads. The arrangement allows for relative movement between the two wall skins. <IMAGE>

Description

SPECIFICATION Apparatus for providing an arch support Technical Field of the Invention i The invention relates to apparatus for providing an arch support, particularly in a brick-veneer cavity wall construction, and to such a wall construction in which such apparatus is incorporated.

BackgroundArt In brick-veneer cavity wall construction, there is often relative movement between the two skins of the wall. At the same time it is necessary to support the bricks, which form the outer skin, over the opening as an arch or courses of brickwork while allowing for this relative movement. Prior apparatus has not allowed for the relative movement with the result that distortion of the wall leading to possible failure of the wall or any plaster thereon results.

It is an object if the invention to seek to mitigate this disadvantage of the prior art.

Disclosure of the Invention According to the invention there is provided an apparatus for providing an arch support in a brick veneer cavity wall construction, comprising a retain ing means including a part adapted to be secured to an inner skin of the wall and a seating part, and a lintel which has a limb adapted for being received by the seating part of the retaining means, a plate or part for supporting a course or a plurality of superimposed courses of bricks of the outer skin of the wall, and a substantially rigid part connecting the limb and the plate or part and in use spanning the cavity.

Using the invention it is possible to provide apparatus in which a lintel can support a brick veneer or outer skin of a wall and which lintel is itself supported in the wall.

The retaining means may further include a support part adapted to support the lintel in use. This construction enables the lintel to counter any ten dency to twist torsionally under load.

The support part may project from the retaining means across the cavity in use and may engage the substantially rigid part of the lintel. The projecting support part may thus act as a buttress or strut on the rear surface of the lintel, so preventing or hindering torsional bending of the lintel.

In a preferred embodiment, the part of the retain ing means adapted to be secured to the inner skin may comprise a substantially flat plate which may terminate at one edge in a lip defining with the flat plate the seating part and, at an edge opposite the one edge, the support part. This construction provides a relatively simple retaining means which may be unitary, in other words made from a single piece metal.

ç The substantially rigid part of the lintel may comprise a first element which extends from the limb and a second element which extends from the first element and may join with the plate or part for supporting a course or a plurality of superimposed courses of bricks of the outer skin of the wall. This construction of lintel relatively easily spans the cavity and may be made relatively simply from a single sheet of metal.

The invention extends to apparatus as herein defined with the retaining means and lintel assembled with the limb in the seating part, mounted in a brick-veneer cavity wall construction.

Apparatus embodying the invention is hereinafter described, by way of example, with reference to the accompanying drawings, in which Figure lisa side elevational view of the retaining apparatus; Figure 2 is a front elevational view of the retaining means of Figure 1; Figure 3 is a side elevational view of a lintel of the apparatus, for use with the retaining means of Figure 1 and 2; and Figure 4 is a side elevational view of the apparatus installed in a cavity wall of brick-veneer construction.

Referring to Figures 1 and 2 of the drawings, apparatus for providing an arch support in a brick veneer cavity wall construction for a timber frame building includes a retaining means 1 for a lintel 2 (Figure 3). The retaining means 1 is suitably made from a single piece of 2.5mm thick hot dipped galvanised sheet steel to A.S. 1397. The retaining means 1 has a part 3 comprising a substantially flat plate adapted as by through holes 4 for securing means such as nails or screws to be secured to the inner (to the left as viewed in Figure 4) skin (timber frame) of the wall, and a seating part 5 which is in the form of a lip 6 at one edge (the upper edge was viewed) of the flat plate 3.The lip 6 is downturned and substantially parallel to the plate 3 and has a free edge 7 which diverges from the flat plate in the downward direction in order to provide relatively easy access to a channel 8 between the flat plate 3 and the lip 6.

The retaining means 1 also has a support part adapted to support the lintel comprising a part 9 which projects across the cavity. The projecting part 9 has a downturned lug or free edge 10.

The lintel 2 (Figure 3) is made as by pressing from a single sheet of hot dipped galvanised sheet steel. It has a limb 11 which in use is at or adjacent the inner skin of the cavity wall. The limb 11 merges with a substantially rigid part 12 which consists of an upper (as viewed) downwardly (from right to left in Figure 3) inclined element 13 and a substantially vertical lower (as viewed) element 14. The element 14 merges with a plate or part 15 which in use lies in the outer (to the right in Figure 4) brick-veneer skin of the cavity wall.

The plate or part 15 has a downwardly turned free edge 16 comprising a drip lip offwhich condensed moisture can flow, out of the wall. The substantially rigid part 12 thus connects the limb 11 and the plate or part 15 and in use provides a rigid support member.

The use of the apparatus is shown in Figure 4, which shows part of a timber frame construction building with a brick-veneer outer skin 17 separated from the timber frame 18 by a cavity 19. Figure 4 shows part of a buttress 20 at one side of an opening and part of the arch 21 built up over the opening, supported by the lintel 2. In use, the brick-veneer 17 is built up to the desired height on either side of the opening, in which an aluminium (for example) window frame (not shown) is to be mounted. The timber frame inner skin 18 is in position and the retaining means 1 is secured to it at a suitable position say in the middle ofthe opening by driving nails 22 through the holes 4 into the wood 18. (The nails 22 are shown schematically in Figure 4).The flat plate 3 lies against the wooden frame 18, the channel 8 is open downwardly and the part9 projects across the cavity 19. The lintel 2 is then placed into position so that the lower plate or part 15 rests on the buttresses 20 at either side of the opening and the limb 11 enters the channel 8. The element 13 then extends across the cavity 19 and the element 14 is engaged by the lug 10 of the projecting part 9 as shown. The bricks 21 are then built up over the opening, being supported by the plate or part 15, so that the element 14 is between the bricks 21 and the projecting part 9 and lug 10 of the retaining means 1.The projecting part 9 thus bears on the lintel 2 via the lug 10 and supports the lintel from the rear (to the left as seen in Figure 4) in the lateral direction (that is, across the cavity) and helps to counter any tendency of the lintel 2 to twist under torsion owing to applied loads from the bricks. Also, even if the timber frame 18 shrinks there is sufficient free space in the channel 8 above {as viewed) the free edge of the limb 11 so that the lintel is always received in the seating part 5.

It will be understood thatthe invention abovedescribed and shown in the drawings may be modified in several ways. Thus the rigid part may have any suitable configuration rather than the two-part shown, providing it spans the cavity. Also, there may be more than orfewerthan thethree through holes shown in the retaining means.

It will also be understood that the although bricks 21 have been referred to as comprising the outer skin, other building components such as stone blocks, breeze blocks glass bricks or blocks and the like could be used, and the term brick used herein is to be read as including such components.

Claims

1. Apparatus for providing an arch support in a brick-veneer cavity wall construction, comprising a retaining means including a part adapted to be secured to an inner skin of the wall and a seating part, and a lintel which has a limb adapted for being received by the seating part of the retaining means, a plate or part for supporting a course our a plurality of superimposed courses of bricks of the outer skin of the wall, and a substantially rigid part connecting the limb and the plate or part and in use spanning the cavity.

2. Apparatus according to Claim 1, the retaining means further including a support part adapted to support the lintel in use.

3. Apparatus according to Claim 2, the support part comprising a partwhich projects from the retaining means across the cavity in use and en gages the substantially rigid part of the lintel.

4. Apparatus according to Claim 3, the part of the retaining means adapted to be secured to the inner skin comprising a substantially flat plate which terminates at one edge in a lip defining with the flat plate the seating part and at an edge opposite the one edge, the support part.

5. Apparatus according to any preceding claim, with the retaining means and lintel assembles with the limb in the seating part, mounted in a brickveneer cavity wall construction.

5. Apparatus according to any preceding claim, the substantially rigid part of the lintel comprising a first element which extends from the limb and a second element which extends from the first element and joins with the plate or part for supporting a course or a plurality of couses of bricks of the outer skin of the wall.

6. Apparatus for providing an arch support in a brick-veneer cavity wall construction, substantially as hereinbefore described with reference to and as shown in the accompanying drawings.

7. Apparatus according to any preceding claim, with the retaining means and lintel assembled with the limb in the seating part, mounted in a brickveneer cavity wall construction.

CLAIMS (Filed 10Aug1981)

1. Apparatus for providing an arch support in a brick-veneer cavity wall construction, comprising a retaining means including a part adapted to be secured to an inner skin of the wall and a seating part, and a lintel which has a limb adapted for being received by the seating part of the retaining means, a plate or part for supporting a course or a plurality of superimposed courses of bricks of the outer skin of the wall, and a substantially rigid part connecting the limb and the plate or part and in use spanning the cavity of the retaining means further including a support part adapted to support the lintel in use, which support part comprises a part which projects from the retaining means across the cavity in use and engages the substantially rigid part of the lintel.

2. Apparatus according to Claim 1, the part of the retaining means adapted to be secured to the inner skin comprising a substantially flat plate which terminates at one edge in a lip defining with the flat plate the seating part and at an edge opposite the one edge, the support part.

3. Apparatus according to Claim 1 or Claim 2, the substantially rigid part of the lintel comprising a first element which extends from the limb and a second element which extends from the first element and joins with the plate or part for supporting a course or a plurality of courses of bricks of the outer skin of the wall.

4. Apparatus for providing an arch support in a brick-veneer cavity wall construction, substantially as hereinbefore described with reference to and as shown in the accompanying drawings.