GB2174122A

GB2174122A - Wall tie

Info

Publication number: GB2174122A
Application number: GB08506253A
Authority: GB
Inventors: Roger Townsend
Original assignee: Harris & Edgar Ltd
Current assignee: Harris & Edgar Ltd
Priority date: 1985-03-11
Filing date: 1985-03-11
Publication date: 1986-10-29
Also published as: GB8506253D0

Abstract

The tie has a horizontal first end part 11, a vertical second end part 12, and between the end parts a horizontal inverted channel section 13. Channel section 13 defines a web 23 and two downturned flanges 24, 25 along opposed longitudinal edges. There are a raised portion 26 in web 23, drip formation(s) 31, 32 in each flange 24, 25, and gutter(s) 29, 30 in web 23 adjacent to raised portion 26 and communicating at opposite ends with a longitudinal edge of the web. The tie is pressed and folded from sheet-metal. <IMAGE>

Description

SPECIFICATION A wall tie This invention relates to a wall tie particularly for tying together the leaves of cavity walls.

According to the invention, there is provided a wall tie pressed from sheet metal and having a first end part which lies in a horizontal or substantially horizontal plane (as considered in use), a second end part which lies in a vertical or substantially vertical plane (as considered in use), and between the end parts an inverted channel section, which lies in a horizontal or substantially horizontal plane (as considered in use), the inverted channel section defining a web and two downturned flanges along opposed longitudinal edges, the inverted channel section having a raised portion in the web, at least one drip formation in each downturned flange, and at least one gutter in the web adjacent to the raised portion and communicating at opposite ends with a longitudinal edge of the web.

Preferably, the web has therein two gutters, opposite ends of one gutter communicating with one longitudinal edge of the web, and opposite ends of the other gutter communicating with the other longitudinal edge of the web. In this case the gutters may be generally C-shaped as viewed in plan.

Alternatively, the web has one gutter which communicates at opposite ends with opposed longitudinal edges, respectively, of the web.

Preferably, each downturned flange has two drip-formations spaced apart longitudinally of the tie.

Advantageously, the raised portion is provided in the web adjacent to the second end part and over part of its length extends to the longitudinal edges of the web. In this case, the web may have at least one further raised portion interposed between the first-mentioned raised portion and the first end part and the gutter or gutters may communicate with the longitudinal edges of the web on that side of the part of the first mentioned raised portion extending to the longitudinal edges of the web, which is adjacent to the first end part.

Preferably, the first end part has at least one depression therein for keying to mortar.

The first end part may have two downturned flanges which are continuous with the downturned flanges of the inverted channel section.

Preferably, the second end part has one or more through holes therein for receiving fastening elements.

The second end part may have two flanges, which are continuous with the downturned flanges of the inverted channel section. In this case, the second end part may have a recess between its two flanges, the recess extending from one end to the other of the second end part, and a protrusion in the base of the recess, the protrusion having the through hole or holes therein.

The invention will now be more particularly described by way of example with reference to the accompanying drawing, which- is a perspective view of one embodiment of a wall tie according to the present invention.

Referring to the drawing, the wall tie 10 shown therein is formed by pressing and then folding a strip of sheet metal and is intended for use in tying together two leaves of a cavity wall where the tie is face fixed to one leaf and embedded between bricks or blocks in a mortar joint in the other leaf.

Various lengths of tie will be available but the one shown is for use in cavities of between 75 and 100 mm.

The wall tie comprises two end parts 11 and 12 and an inverted channel section 12 therebetween.

The end part 11 and inverted channel section 13 lie in a horizontal plane (as considered in use) and the end part 12 lies in a vertical plane (as considered in use) and is folded up at a right angle with respect to the channel section 13 and the end part 11.

The end part 11 has two spaced apart generally square dished mortar retaining depression 14 and 15. One such depression would, however, suffice and it need not necessarily be generally square.

The end part 12 has raised ribs 16 and 17 along opposed longitudinal edges, an elongate recess 18 between the ribs 16 and 17 and a central elongate protrusion 19 in the base of the recess 18. The recess 18 extends from one to the other end of the end part 12 and the protrusion has three holes 20, 21 and 22 therein. The hole 21 is for receiving a fastening element in the form of an expanding socket (not shown) by which the end part 12 can be fixed to one leaf of a cavity wall. Alternatively, the end part can be fixed to the one leaf of the cavity wall by stainless steel screws in holes 20 and 22. The ribs 16 and 17 enhance the stiffness of the end part 12 and the protrusion 19 can serve as a torque indicator as it will start to collapse at excessive torque when using an appropriate expanding socket.

The inverted channel section 13 defines a web 23 and two downturned flanges 24 and 25 along opposed longitudinal edges. The flanges 24 and 25 continue along the edges of the end part 11 to enhance the stiffness of the end part 11 and continue along the edges of the end part 12 to form the outer edges of the ribs 16 and 17.

A gusset 33 is formed between each rib 16 and 17, and the web 23. These gussets improve the resistance to bending under axial tensile loading (i.e.

that which may be caused by negative wind pressure on the facade of the building).

The inverted channel section 13 has a raised portion 26 adjacent to the end part 12 and two additional raised portions 27 and 28 which are spaced apart longitudinally between the raised portion 26 and the end part 11. A part of the raised portion 26 intermediate its ends extends to the longitudinal edges of the web 23. On either side of this intermediate part the raised portion 26 tapers inwards, and then extends longitudinally in particular to that side thereof ajdacent to the end part 11. The raised portion 26 is highest along a longitudinal centre line of the tie and is slightly downwardly inclined on either side thereof.

Two generally C-shaped gutters 29 and 30 are provided in the web 23 adjacent to the raised portion 26. The two gutters 29 and 30 are disposed respectively on opposite sides of a plane which bissects the web and which is parallel to the longitudinal extent of the web. The opposite ends of the gutter 29 communicate with one longitudinal edge of the web ane the opposite ends of the gutter 30 communicate with the other longitudinal edge of the web.

Two drip formations in the form of laterally outwardly projecting bulges 31 and 32 are provided in each flange 24, 25. The lower edge of each bulge 31,32 is laterally outwardly displaced from the associated flange 24,25. The bulges 31 are aligned transverseiy of the channel section 13 with the intermediate part of the raised portion 26 and the bulges 32 are disposed inbetween the two ends of respective gutters 29 and 30.

The raised portion 26, gutters 29 and 30, and the bulges 31 and 32 discourage moisture from travelling along the tie.

The additional raised portions 27 and 28 are square in plan and together with the flanges 24 and 25, the raised portions 26 and the gutters 29 and 30 enhance the stiffness of the channel section 13.

The wall tie may be provided with a disc or plate shaped insulation locating member (not shown) snap-fittable on the channel section 13 and slidable therealong. The insulation locating member will be preferably of plastics material, e.g. polyethylene, and will be capable of holding a sheet of insulation against one of the leaves of the cavity wall.

The wall tie described above may be modified in various ways without departing from the scope of the invention. For example, the tie may have only a single gutter, which extends from one to the other edge of the web 23 and in this case preferably again on that side of the raised portion 26 adjacent to the end part 11. Moreover, one pair of bulges 31 or 32 couid be omitted.

Claims

1. A wall tie pressed from sheet metal and having a first end part which lies in a horizontal or substantially horizontal plane (as considered in use), a second end part which lies in a vertical or substantially vertical plane (as considered in use), and between the end parts an inverted channel section, which lies in a horizontal or substantially horizontal plane (as considered in use), the inverted channel section defining a web and two downturned flanges along opposed longitudinal edges, the inverted channel section having a raised portion in the web, at least one drip formation in each downturned flange, and at least one gutter in the web adjacent to the raised portion and communicating at opposite ends with a longitudinal edge of the web.

2. The wall tie of Claim 1, wherein the web has therein two gutters, opposite ends of one gutter communicating with one longitudinal edge of the web, and opposite ends of the other gutter communicating with the other longitudinal edge of the web.

3. The wall tie of Claim 2, wherein the gutters are each generally C-shaped as viewed in plan.

4. The wall tie of Claim 1, wherein the web has one gutter which communicates at opposite ends with opposed longitudinal edges, respectively, of the web.

5. The wall tie of anyone of the preceding Claims, wherein each downturned flange has two drip formations spaced apart longitudinally of the tie.

6. The wall tie of anyone of the preceding Claims, wherein the raised portion is provided in the web adjacent to the second end part and over part of its length extends to the longitudinal edges of the web.

7. The wall tie of Claim 6, wherein the web has at least one further raised portion interposed between the first mentioned raised portion and the first end part.

8. The wall tie of Claim 6 or Claim 7, wherein the gutter or gutters communicate with the longitudinal edges of the web on that side of the part of the first mentioned raised portion extending to the longitudinal edges of the web, which is adjacent to the first end part.

9. The wall tie of anyone of the preceding Claims, wherein the first end part has at least one depression therein for keying to mortar.

10. The wall tie of anyone of the preceding Claims, wherein the first end part has two downturned flanges which are continuous with the downturned flanges of the web of the inverted channel section.

11. The wall tie of anyone of the preceding Claims, wherein the second end part has one or more through holes therein for receiving fastening elements.

12. The wall tie of Claim 11, wherein the second end part has two flanges which are continuous with the downturned flanges of the web of the inverted channel section.

13. The wall tie of Claim 12, wherein the second end part has a recess between its two flanges, the recess extending from one end to the other of the second end part, and a protrusion in the base of the recess, the protrusion having the through hole or holes therein.

14. The wall tie of anyone of the preceding Claims, wherein the drip formations are in the form of laterally outwardly projecting bulges in the flanges of the channel section.

15. A wall tie substantialy as hereinbefore described, with reference to, and as shown in, the accompanying drawing.

16. The wall tie of anyone of the preceding Claims, in combination with a disc or plate shaped insulation locating member snap-fittable on the inverted channel section.