GB2194263A

GB2194263A - Wall tie device

Info

Publication number: GB2194263A
Application number: GB08715745A
Authority: GB
Inventors: Donald Furr; Paul John Furr
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-07-03
Filing date: 1987-07-03
Publication date: 1988-03-02
Anticipated expiration: 2007-07-03
Also published as: EP0252696A3; EP0252696A2; ATE89884T1; GB2194263B; EP0252696B1; AU1970488A; CA1290957C; DE3785971D1; DE3785971T2; GB8715745D0; GB8616302D0; AU609162B2

Abstract

A wall tie system for use during construction of a new structure to tie the new structure to an existing wall. The system comprises a backing plate 1 which in use, is fixed to the existing wall and a number of wire ties (20, 21, 22 Fig. 4) having one part (21) which is, in use, engaged with the backing plate 1 and another part (20) which is interposed between successive courses of the new wall. The backing plate is provided along its length with a number of hook-like tabs 7 extending out of the front face of the backing plate behind which the wire ties are engaged. The tabs 7 are arranged in opposed pairs and the pairs in longitudinally spaced groups with three pairs to a group. The wire ties (20, 21, 22) are approximately U- shaped with the ends 21, 22 of the links of the U bent at right angles to the plane of the U. The tie (20, 21, 22) is fitted to the backing plate 1 by inserting the bent ends (21) of the limbs of the U behind the tabs 7 so that the web (20) of the U extends outwardly from the backing plate 1 and positioning the tie on the backplate (1) so that the web 20 of the U lies between two successive courses of the new wall. <IMAGE>

Description

1 GB2194263A 1

SPECIFICATION plate, at least 1 em, more preferably at least

2cm.

Wall tie device The tabs may be arranged on the back-plate in laterally spaced pairs with each tab being The present invention relates to a wall tie de- 70 adapted to engage one limb of the tie and the vice comprising a wall plate and at least one tabs of each pair extending towards on connecting tie for the purpose of tying a brick another. Such tabs or hooks can conveniently or block structure to an existing structure each be stamped and folded out of the back plate.

tie having a first portion which engages with The number of tabs can vary, for instance the wall bracket and a second portion which 75 there can be a small number of long tabs or a is interposed between successive courses of larger number of short tabs. The pairs of tabs the brick or block structure. may also be arranged in longitudinally spaced In the past the construction of a partitioning groups of, for example, 2 to 5 pairs. Prefera- wall or new external wall necessitated inter- bly fixing means e.g. holes for bolts, screws, leaving of the new bricks with the old to 80 nails etc to allow the back- plate to be at establish a solid structure. However, this was tached to the existing wall are disposed be a time consuming and skilled operation where tween the groups of pairs.

all old bricks had to be gouged out so that Alternatively, there can be only two continu- the new bricks could be interleaved between ous tabs extending lengthwise of the back them. To simplify this process interengaging 85 plate. By making the various features of the plates and ties have been proposed which back-plate symmetrical about its longitudinal firmly tie the new structure to the existing one centre it need not be orientated in a particular without the use of interleaving brick work. way when fitted to a wall.

The present invention relates to an improved The invention also provides a tie for use form of a tie system comprising a wall plate 90 with the system of the present invention, the and a tie. tie comprising two limbs which are capable of The present invention provides a wall tie being held by the tabs on the back-plate. The device for tying a newly constructed brick or limbs may be rigid or resilient. The tie is pre block structure to an existing structure, the ferably adapted so that it can be moved, pre device comprising a back-plate adapted to be 95 ferably continuously, lengthwise of the back secured to the existing structure and to en plate. Thus the tie should be shaped so that gage with one or more wall ties interposed the parts of the tie which is to be interposed between successive courses of the newly built between the courses of bricks is clear of the structure to tie the newly built structure to the fixing means when the tie is in position. The existing structure the back-plate including a 100 fixing means are preferably arranged to permit series of engaging means disposed along the vertical adjustability of the ties in the space length of the back-plate, each for engaging a between respective adjacent fixing means and first part of such a wall tie while a second more preferably continously along the length part of the wall tie extends outwardly from a of the bracket. Suitably the tie has two limbs front face of the back-plate to be interposed 105 which are interconnected at an end and have between two successive courses of the newly their free ends bent over to form ---feet-so built structure wherein the engaging means that the central, bent portion of the tie may each comprises a pair of opposed tabs ex- be disposed between the courses of the new tending forwardly out of the plane of the structure and the free ends of the tie disposed back-plate and laterally over the front face of 110 lengthways along the back plate engaging the the back-plate to define two or more free tabs.

edges extending lengthwise of and in front of In use the limbs of the tie are engaged with the plane of back-plate behind which the first the tabs of the back-plate by being held be part of the wall tie may, in use, be engaged. tween the back plate and the tab. This may The construction of the back-plate according 115 be done by first engaging the free end of one to the present invention means that the tie of its limbs with the securing means in a man may be engaged with the back-plate at any ner such that the tie is pivotable about an axis point along its length so that the system may lengthwise of the back plate, then pivoting the accommodate different brick sizes. In this way tie about that axis into a position in which the the problem of having to manufacture a range 120 free end of the other of its limbs can spring of brick size-dependent backplate can be into engagement with the securing means.

avoided. In addition since the tie may be en- Thus the invention provides a convenient and gaged with the back-plate by pushing it per- easy way to attach the tie to the bracket. The pendicularly towards. the back-plate there is no feet are preferably of such a length that they need for either end of the back-plate to be 125 engage a plurality of tabs, for example two or accessible in order to be able to insert the tie. more. They may be of such a length that they Preferably the tabs are in the form of hookengage all of the tabs positioned between a like projections having first parts extending pair of fixing means, outwardly from the plane of the back-plate Preferably the feet of the tie are spaced and a second part transversely of the back- 130 apart and are interconnected by a central por- 2 GB2194263A 2 tion which extends longitudinally along the side flanges at opposite sides of the back wall under construction. The central portion plate or, alternatively none may be provided.

may, for example, be generally -U- shaped Disposed along the longitudinal centre line of with a curved or straight web to the "U". the back-plate is a series of fixing holes 6.

There may be an additional section between 70 These holes may be circular, or may be of the limb and each foot. This may take the rounded oblong or oval shape to provide a form of a knee extending in the opposite didegree of lateral adjustability of the back-plate rection to the feet so that the tie can be held when fixed to a wall.

in position on the back-plate by tabs above Disposed longitudinally between the fixing and below the central portion. The knee may 75 holes 6 are three pairs of tabs 7. These tabs be made the same length as the feet so that 7 are stamped and folded out from the back where the back-plate has a plurality of pairs of plate 1 and are so adapted such that a tie tabs the tie is engaged with an identical num- (described below) can be held against the sur ber of the securing means regardless of its face 2 of the back plate 1. The tabs 7 corn longitudinal position relative to the back-plate. 80 prises a part which extends perpendicularly The feet may be made of the same material from the back-plate 1 and a part which is as the rest of the tie. The tie can be manufac- parallel to the back plate 1, although it can tured from one length of wire so shaped as to slope inwards towards the centre of the back leave a space between the feet to accommo- plate 1 to help keep the tie in place. It will be date the passage of the fixing bolts as the tie 85 appreciated that a continuous tab could be is slid length-wise of the back-plate. The tie provided by joining all the individual tabs to may alternatively be solid, eg. made of folded gether.

sheet metal, in which case it can be so The back-plate is provided with a number of shaped as to have a vertically extending chan----feet-8 to maintain it in parallel spaced rela- nel again for the purpose of accommodating 90 tion to the existing wall so that the rear sur the fixing bolts. face 3 is stood off from the surface of the The invention further provides a combination existing wall. This provides a space into which of back-plate and a tie embodying the present mortar from the new courses of bricks can invention. enter via the holes 9 behind the tabs 7. The The invention will be further described by 95 holes 9 are produced when the tabs 7 are way of a non-limitative example with reference stamped and folded out of the back-plate 1.

to the accompanying drawings, in which: The mortar helps bond the new wall to the Figure 1 shows a portion of a back-plate for existing one provided there is no excessive use in an embodiment of the present inven- relative vertical movement of the two walls.

tion. 100 As can be seen in Figures 1 and 2 the side Figure 2 shows a portion of the back-plate flanges 4 stop short of the end of the back- of Figure 1 viewed from the side. plate and have a rounded corner 10. The Figure 3 shows a portion of the back-plate other end of the back-plate can be of corre- of Figure 1 viewed from the end. sponding layout with the centre part between Figure 4 shows one form of tie for use with 105 the two ends comprising as many repeats as the back plate of Figure 1. are necessary to achieve the desired length of Figure 5 shows the tie of figure 4 viewed the section A-B in figure 1.

from the side. Referring now to figures 4, 5, 6, 7 and 8 Figure 6 shows the tie of figure 4 viewed in the tie 20 comprises an approximately -Uperspective. 110 shaped middle portion (it should be noted that The dotted line shows the tie in a position unlike a conventional letter "U", the two in which it could be in use. j limbs preferably converge in the direction Figure 7 shows an embodiment of the tie away from the web of the---U-) and with the device in use. free ends of the limbs of the -Ubeing bent Figure 8 shows an alternative form of tie for 115 over to form---feet-21 which are at least use with the back-plate of Figure 1. approximately perpendicular to the plane of The back-plate of which one end portion is the -U- section so that they extend along the shown in Figures 1 and 2 is stamped and back-plate when the tie is installed. The feet folded out of sheet metal and comprises a 21 can be spaced apart from the -U- shaped plate 1 having a surface 2 which faces the 120 middle portion by an intervening section 22.

new brickwork and a reverse surface 3 which Alternatively, they are spaced apart from the faces the-existing structure. The back-piate -U- shaped middle portion by an ear 23 as may be suitably coated, eg with an epoxy shown in Figure 8. In the form shown in Fig resin, or be of a suitable material, to be highly ure 8 the feet 21 external approximately equal resistant to corrosion. 125 distances in the two opposite directions from The back-plate may be provided with a side the plane defined by the intervening central flange 4 formed by folding the sheet metal at section 22. The tie is made of metal wire or right angles to the back plate 1, this flange rod material.

being provided with a row with keying holes When a new wall is to be built and tied to 5 for mortar, plaster or rendering. Two such 130 an existing structure, one or more back-plates 3 GB2194263A 3 such as the one in Figure 1 are fixed to the posed along the length of the back-plate, each old wall along the vertical line from which the for engaging a first part of such a wall tie new wall will extend. There may be a continu- while a second part of the wall tie extends ous or intermittent arrangement of these back- outwardly from a front face of the back-plate plates along this line. Alternatively one contin 70 to be interposed between two successive uous back-plate may be used. courses of the newly built structure wherein The back-plate may be fixed to the existing the engaging means each comprises a pair of structure by any suitable means such as nails, opposed tabs extending forwardly out of the screws or bolts so as to fix the back-plate 1 plane of the back-plate and laterally over the firmly to the wall. Every so often a tie 20 75 front face of the backplate to define two or must be fixed to the back-plate and be placed more free edges extending lengthwise of and on top of the top course of bricks so far laid in front of the. plane of back-plate behind out in the new structure so that in the laying which the first part of the wall tie may, in of the next course of bricks the tie 20 is use, be engaged.

firmly interposed between them and strongly 80 2. A device according to claim 1 wherein holds these new bricks to the back-plates. the tabs are stamped and folded out of the This is done by squeezing the limbs 21 of the back-plate.

tie 20 together, if the tie is resilient, and in- 3. A device according to claim 1 or 2 serting the tie 20 between a pair of tabs 7 by wherein a first part of each tab extends sub pushing the tie 20 perpendicularly, or at least 85 stantiaily perpendicularly outwardly from the approximately perpendicularly, towards the plane of the back-plate and a second part back plate 1. thereof extends substantially parallel to and Alternatively the tie may be slid down be- over the back-plate in a direction laterally tween the pairs of tabs 7 so that the U thereof to form a hook.

shaped portion rests on the top course of 90 4. A device according to claim 3 wherein bricks of the new structure. Once the tie 20 is the second part of each tab extends towards in the required position the limbs can be re- the back-plate.

leased, if they are resilient, so that they spring 5. A device according to any one of claims outwards to press against the vertical part of 1 to 4 wherein a plurality of pairs of opposed the tabs 7. The feet 21 are held behind suc- 95 tabs are provided spaced lengthwise along the cessive tabs 7 and may be positioned up- back-plate.

wards or downwards relative to the wall 6. A device according to claim 5 wherein structures, although an upwards position is the tabs of each pair extend towards one preferred so that the feet 21 do not have to another.

be pushed into mortar associated with lower 100 7. A device according to claim 5 or 6 courses of bricks or blocks. wherein the pairs of tabs are arranged in The tie shown in Figure 8 has an indent 24 spaced groups with fixing means allowing the in each limb. This can provide the limbs with back-plate to be fixed to the existing wall, an extra degree of resilience or can provide a disposed between longitudinally adjacent suitable means for holding the tie between a 105 groups.

holder's thumb and forefinger. 8. A device according to claim 7 wherein Once in place the tie 20 can be in a variety the spacing between the fixing means is such of positions relative to the back plates. For that when the back-plate is placed against the example the part of the central portion nearest existing wall, at least two fixing means regis the intervening section 22 can rest on top of 110 ter with courses of the existing wall.

a tab 7. Alternatively, since the feet 21 ex- 9. A device according to any one of the tend vertically upwards or downwards behind preceding claims wherein a flange is provided the rear of the tab 7, the tie 20 can also be extending forwardly from the plane of the positioned such that the central portion is in back-plate along a longitudinal edge of the an intervening position between two pairs of 115 back-plate.

tabs 7. For example it can be between two 10. A device according to claim 9 wherein adjacent pairs of tabs 7 or it can be between a flange is provided along both longitudinal two pairs of tabs means 7 which are sepaedges of the back-plate.

rated by a fixing hole 8. 11. A device according to any one of the 120 preceding claims wherein the free edges of

Claims

CLAIMS the corresponding tabs of the series of engag-

1. A wall tie device for tying a newly con- ing means conform to a line extending longitu- structed brick or block structure to an existing dinally of the back- plate.

structure, the device comprising a back-plate 12. A device according to any one of the adapted to be secured to the existing struc- 125 preceding claims in combination with at least ture and to engage with one or more wall ties one wall tie engageable with a pair of the tabs interposed between successive courses of the on the back-plate.

newly built structure to tie the newly built 13. A combination according to claim 12 structure to the existing structure the back- wherein the first part of each tie comprises a plate including a series of engaging means dis- 130 pair of spaced-apart legs engageable with re- 4 GB2194263A 4 spective ones of the tabs of one of the en gaging means.

14. A combination according to claim 13 wherein the legs of each tie are bent so as to extend lengthwise of the back-plate when the second part of the tie is interposed between said successive courses.

15. A combination according to claim 13 or 14 the legs are so dimensioned as to engage with the tabs of at least two longitudinally adjacent engaging means.

16. A wall tie device constructed and ar- ranged to operate substantially as hereinbefore described with reference to and as ilustrated in the accompanying drawings.

17. A combination of a wall tie device with at least one wall tie the combination being constructed and arranged to operate substan tially as hereinbefore described with reference to and as illustrated in the accompanying drawings.

Published 1988 at The Patent Office, State House, 66/71 High Holborn, London WC 1 R 4TP. Further copies may be obtained from The Patent Office, Sales Branch, St Mary Cray, Orpington, Kent BR5 3 RD.

Printed by Burgess & Son (Abingdon) Ltd. Con. 1/87.