GB2237838A

GB2237838A - Replacement wall ties

Info

Publication number: GB2237838A
Application number: GB8925524A
Authority: GB
Inventors: Peter John Renwick
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-11-11
Filing date: 1989-11-11
Publication date: 1991-05-15
Also published as: GB8925524D0

Abstract

A wall tie comprising a hollow tube 1 of corrosion resistant material, perforated at either end is inserted into a hole drilled through the outer layer 4 of cavity wall, into the inner layer 3. The tube is filled with a water proof setting paste which spills out into the wall material to which it adheres. When the paste sets it locks the outer and inner layers of the wall into the wall tie. <IMAGE>

Description

WALL TIE This invention refers to a wall tie.

Wall ties are used to link the inner and outer layers of a cavity wall together. The most common wall tie is made of galvanised wire formed into two linked triangles. This wall tie is laid into the wet mortar of the inner and outer masonry at the time of construction of the wall. It is however difficult to insert such a tie into an already constructed wall. This is necessary, for example, when the original wall ties have corroded away.

According to the present invention there is provided a wall tie comprising a hollow inserted through a hole drilled through the outer layer of the wall into the inner layer of the wall, filled with a setting paste which is caused to spill out through holes in the side of the hollow member.

A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawing in which: Fig 1 shows the wall tie in perspective.

Figure 2 shows the position of the wall tie in a cross section of the wall.

Figure 3 shows a cross section of the wall tie bonded to the wall by hardened paste.

Referring to the drawing the wall tie comprises a stainless steel tube drilled with numerous radial holes (2) as illustrated in Fig 1. The holes (2) are drilled in the tube to coincide with the inner (3) and outer (4) brick work. A hole slightly larger than the tube is drilled in the direction of the arrow (5) through the outer layer of the wall (4) and most of the way through the inner layer of the wall (3). Fig 2 shows a cross section of this hole with a wall tie (1) shown inserted. With the wall tie in the position shown (fig 2) a paste (6) is squeezed into the wall tie (1) until it exudes from the radial holes (2) in the wall tie (1) into the space between the hole in the masonry (5) and the wall tie (1). The paste (6) will b e formulated to adhere readily to the brick work and, on setting hard, to form a bond between brick work (3 and 4) and the wall tie (1) illustrated, as a cross sectional view, in fig 3. The paste (6) will be formulated to prevent the passage of moisture from one wall layer to the other wall layer. Thus the wall tie, as illustrated in fig 3, bonds the inner wall to the outer wall.

Claims

1. A wall tie comprising a hollow member, with perforated side walls at either end, constructed of corrosion resistant material.

2. A wall tie as claimed in claim one wherein it is inserted through a hole in the outer layer of a cavity wall into a co-exiel hole in the inner layer of the cavity wall, to be positioned such that the perforated sections of the tube are adjacent to the wall material (masonry).

3. A wall tie as claimed in claim one and claim two wherein the wall tie is attached and fixed to the wall material by the injection into the tube and the extension from the side hole of the tube of a semi liquid paste that will set hard forming a waterproof cement.