GB2189275A - Cavity tray with means to locate adjacent trays together - Google Patents

Description

GB 2 189 275 A 1 SPECIFICATION sidewall portion may bearranged atan angle

of substantially 90'to the base portion. In addition, a CavItytray furthersidewall portion may be provided atthe other end of the base portion.The oreach sidewall portion This invention relatesto a cavitytray. 70 is preferably secured to the rearwall portion.

In cavitywall structures comprising first and second Preferablythe or each locating formation is pro spacedwalls itis common for moistureto run down vided on the rearwall portion,and more preferablythe theouterof thetwo walls. It is desirable to take steps to oreach locating formation is provided on both the rear preveritthe moisture running downthiswall. It is wall portion and the base portion.

knownto provide a cavitytrayto coliectthe moisture. 75 Preferablythe base portion isconfiguredto restrict Thecavitytraycan be intheform of a lintel, in which theflowof moisture overthe endsthereof, particularly case it mayactas a structural support member, aswell in the region wherethe cavity tray overlaps the as a water collector. adjacent tray. To this endthe base portion may be In GB-A-2,142,359 there is described a cavitytray provided withformations intheform of ribs of comprising a basewhich is disposed inthe outerwall 80 corrugations; the ribs orcorrugations mayrun and a rearwall extending upwardlyinto engagement substantially transverse to the longitudinal axis of the with the innerwall. base portion.

Varioustypes of lintel are described in GB-A- The locating formations may be configured so that 2,103,680, G B-A-2,118,585, G B-A-2,025,789, US-Atheyform a projection on oneface of the cavity 2,245,965 and US-A-2,292,459. 85 member, and form a recess on the opposite face of the When cavitytrays are installed in a roof structure it cavity member. This arrangement enablesthe cavity is often desirable forthem to be arranged in an trayto be disposed in an overlapping relationship with overlapping relationship. If this overlapping rela- an adjacenttray. The cavitytray may be disposed in an tionship is not provided then unwanted moisture may overlapping relationship with two adjacent cavity run further down the outerwall. 90 trays, one on each side.

However, in practise, the cavitytrays may slip about Preferably, when one or more locating formations during installation so thatthere is either no overlap, or are provided on the base portion, these comprisethe so that the overlap is unnecessarily large. aforementioned ribs or corrugations. Desirably the or According to a first aspect of the present invention each locating formation on the base portion is aligned there is provided a cavity tray for use in a wall 95 with the or each locating formation on the rearwall structure having first and second spaced walls defin- portion so thatthe locating means on the adjacent ing a cavity therebetween, saidtray comprising a cavitytray can interlockwith the locating means on cavity member adapted to extend into the cavity and both the rearwall portion and the base portion of the adapted to collect moisture failing in said cavity, and cavity tray.

locating means adapted to locate the cavity tray in an 100 The cavity tray may be formed of a plastics material, over] a p pi ng rel ationsh i p with a n a djacent cavity tray. a n d may be vacu u m formed, o r injectio n mou Ided.

Adva ntag eo usly th e 1 ocati ng mea ns a lso se rves as The locating formations can also act as strengthen retaining means to retain the cavity tray in said i ng formations to p revent th e materia 1 of th e rea r wa 11 overlapping relationship. portion and/orthe base portionfrom curling. This is Advantageously alsothe locating meansservesto 105 especially important when the cavity tray comprises a restrictsliding movement in at leastone direction vacuumformed plastics material.

between adjacent cavity trays. Thecavitytrays according tothe invention may be Preferablythe locating means is adaptedto assist classed in at least four different types.

the positioning of a row of bricks on top of the cavity Thefirsttype is known as horizontal cavitytrays; member. 110 these are especially useful atthejunction between Desirablythe locating means comprises at leastone vertical cavitywalls and flat roof structures.

locating formation provided on the cavity member of The second type is known as parapet cavity trays; the cavitytray, and adapted to cooperate with a these are especially useful in parapetwall structures.

respective locating formation on the adjacent cavity The third type is known as lintel cavity trays; these tray. The locating formations may be adapted to 115 are especially useful above window and door open interlockwith one another. Preferablythe locating ings and above canopies.

means is adapted to permitthe cavitytray to be The fourth type is known as abutment cavity trays, located in a plurality of different overlapping positions and these are especially useful atthe junction between on the adjacenttray. This may be achieved by vertical cavitywalls and pitched roof structures.

providing a plurality of locating formations at different 120 The locating means is particularly useful because it positions on the cavity member. enables a desired amount of overlap to be provided The cavity member may comprise a base portion between adjacent cavitytrays. The law of certain and a rearwall portion secured to the base portion; the countries specifies a minimum overlap, so the locat rearwall portion may be arranged at an obtuse angle ing means enables this overlap to be provided to the base portion. The base portion may be adapted 125 automatically.

to be embedded in the firstwall, and the rear wall According to a second aspect of the invention there portion may be adapted to extend into the cavity; the is provided a cavity trayfor use in a wall structure base portion may also extend partially into the cavity. having first and second spaced walls defining a cavity The cavity member may also include a side wall therebetween, said tray comprising a cavity member portion arranged atone end of the base portion; the 130 adapted to extend into the cavity and adapted to 2 GB 2 189 275 A 2 collect moisturefalling in said cavity, and locating portionwhich issecured tothe base portion and is means adaptedto assistthe positioning of a rowof also adaptedto be embedded in thefirstwall.

bricks on top of the cavity member. Preferably the side wall portion is disposed at an angle The cavitytray according to the second aspect of the of substantially 90'to the base portion. The side wall invention may be provided with one or more of the 70 portion may also be secured to the rear wall portion.

features of the cavitytray according to the first aspect According to a fu rther aspect of the invention there of the invention. is provided a cavitytrayfor use in a wall structure According to a third aspect of the invention there is having first and second spaced walls defining a cavity provided a cavitytrayfor use in a wall structure having therebetween, said tray comprising a cavity member first and second spaced walls defining a cavity 75 adapted to extend into the cavity and adapted to therebetween, said tray comprising a cavity member collect moisturefalling in said cavity, and at least one adapted to extend into the cavity between the first and strengthening formation provided on the cavity mem second walls and to collect moisture failing in the berto strengthen the cavity member.

cavity, and drainage means adapted to drain moisture Advantageously the strengthening formation com from the cavity memberthrough thefirstwail. 80 prises a locating formation as described above.

The cavitytray according to the third aspect of the Reference is now made to the accompanying invention may include one or more features of the drawings, in which:

cavitytray according to the first orsecond aspects of Figures 1 to 8 are perspective views of embodi the invention. ments of horizontal cavity trays according to the Advantageously the drainage means is integral with 85 invention; the cavity member. Figures 9to 16 are perspective views of embodi Advantageously also the drainage means compris- ments of parapetcavity trays according to the es at least one channel provided in the cavity member.. invention; Preferably overflow means is provided to permit Figures 17to 19 are perspective views of embodi excess moistureto be drained onto an adjacentcavity 90 ments of lintel cavitytrays according to the invention; tray. Excess moisture can ariseJor example, when the Figures 20to 22 are perspective views of embodi level of moisture is too greatto be accommodated by ments of abutment cavity trays according to the the drainage means alone. invention; Desirablythe drainage channel is provided with a Figures 23to 28 showvarious embodiments of coverfor covering at least part of the length of the 95 horizontal cavitytrays according to the invention in channel. This helpsto preveritthe channel from position in a wall structure; becoming blocked. The cover may be pivotally Figures 29to 35 showvarious embodiments of mounted so that it can pivot between a position in parapet cavity trays according to the invention in which it coversthe drainage channel and a position it position in a wall structure; does notcoverthe drainage channel. 100 Figure 36 shows an embodiment of lintel cavitytray If desired the cavity member may extend across the according to the invention in position in a wall cavity between thefirst and second walls. structure; The cavity member may include a base portion Figure 37 shows an embodiment of abutment cavity which is adapted to be embedded in the firstwall. The tray according to the invention in position in a wall cavity member mayalso include a rearwall portion 105 structure; which is secured to the base portion; preferablythe Figure 38 showstwo adjacent horizontal cavity trays rearwail portion is secured to the base portion at an in overlapping relationship; obtuse anglethereto. The rearwall portion may Figure 39 shows a continuous stepped cavity tray engage the second wall, so thatthe cavity member according to the invention; and extends across the cavity. 110 Figure 40 shows a cavity tray according to the Preferablythe channel is provided in the base invention for use in refurbishmentwork.

portion. The base portion may also be provided with at In Figure 1 a straight horizontal cavitytray generally least one longitudinally extending elongateforma- designated 1 comprises a cavity memberwhich tion. The oreach formation servesthe purpose of includes a base portion 2 and a rearwall portion 3.

helping to securethe base portion tothe firstwall, and 115 The rearwall portion 3 is securedto the base portion of directing moistureto the drainage channel. 2 along a rearward edgethereof, and is disposed atan The drainage channel may include a first portion obtuse anglethereto.

extending substantial lytransverse to the longitudinal Locating means inthe form of a plurality of axis of the base portion, and a second portion formations 5 are disposed upon the rearwall portion extending substantially parallel to the longitudinal 120 3. The locating formations 5 serveto locate an axis of the base portion. The second portion preferadjacent cavity tray in overlapping relationship with ably extends adjacentto wherethe rear wall portion is the cavity tray 1.

secured to the base portion. Preferablythe second The rearwall portion 3 comprises two opposing portion is disposed at an angle to the plane of the base surfaces 6 and 7. The formation 5 projects outof the portion; desirablythis angle is between Vand 3'. 125 plane of the surface 6, and forms a recess in the The first portion of the drainage channel may be surface7.

adapted to extend through the firstwall, so thatthe A plurality of formations in the form of ribs 13 are moisture is carried from within the cavityto outside provided on the base portion 2. The ribs 13 helpto thefirstwall. channel moisture to the front of the tray and help to The cavitytray member may also include aside wall 130 prevent moisture from flowing overthe ends of the 3 GB 2 189 275 A 3 tray.The ribs 13 mayalsoform part of the locating Locating meansintheform of formations 36are means and may be arranged to engage corresponding provided in the second part 35. The formations 36 are recesses (not shownY provided in the bottom surface similarto the formations 5.

of the base portion 2 Also the ribs 13 help to keythe The principal difference between thetrays 27,28 cavitytray 1 into the mortar. 70and 29 resides in the length of thefirst part34.

Many of the parts shown in Figures 2to 8 are similar Figure 20 shows one embodiment of abutment to the partsshown in Figure 1 and like parts have been cavitytray 101. The tray 101 comprises a cavity designatedwith like reference numerals. memberwhich includes a base portion 102, a rearwall Figure2 illustrates a horizontal cavitytray 14for use portion 103 and a sidewall portion 104.

atanexterior corner of a wall, whilst Figure 3 75 The rearwall portion 103 is secured to the base illustrates a horizontal cavitytray 15for use at an portion 102 and is ' disposed at an obtuse angle thereto.

interior corner of a wall. The sidewall portion 104 is securedto the base Figure4 illustrates a stepped horizontal cavitytray portion 102 and to the rearwall portion 103; the side 16 in which the steps riseto the left,whilst Figure 5 wall portion 104 is disposed atsubstantially 90'to the illustrates a stepped horizontal cavitytray 17 in which 80 base portion 102.

the steps riseto the right. A plurality of elongate formations 105 are provided Figures 6 and 7 illustrate right and left end horizon- on thesidewall portion 104 and the base portion 102, tal cavitytrays 18 and 19 respectively. The end cavity and extend substantially parallel to the longitudinal trays 18 and 19 each include a side wall portion 4 axis of the base portion 102. Theformations 105 assist secured to the base portion 2 and disposed at an angle 85 with securing the base portion 102 and the side wall of substantially 90'to the base portion. In addition the portion 104to a wall.

side wall portions 4 are secured to the rearwall The f ront of the base portion 102 may be provided portions3. with a rebate (not shown) which serves for securing Figure 8 illustrates a joining cavitytray 20 forjoining lead flashing to the cavitytray 101.

two other horizontal cavity trays. 90 The cavitytray 101 also includes drainage means Figure 9 illustrates a straight parapet cavitytray 21. comprising a drainage channel 107 provided in the Many of the parts ofthetray21 are similar to those baseportion 102. The drainage channel 107includesa shown in Figures 1 to 8 and like parts have been first portion 108 and a second portion 109 extending designated with like reference numerals. substantially transverse thereto. The first portion 108 Thetray21 further includesatop portion 22which 95 of the drainage channel 107 extends substantially extends along the upper edge of the rear wall portion transverseto the longitudinal axis of the base portion 3. The top portion 22 is also provided with the ribs 13. 102, while the second portion 109 of the drainage Figures 10 to 16 illustrate parapet cavity trays channel 107 extends substantially parallel to the similarto Figure 9 and like parts have been designated longitudinal axis of the base portion 102, and is with like reference numerals. 100 disposed adjaceritto the rearwall portion 103. The Figure 10 illustrates an interior parapet cavitytray second portion 109 is arranged ata small acute angle 23,which can be inverted to produce an exterior tothe plane of the base portion 102.

parapet cavity tray, as shown in Figure 11. When the Acover111 is provided for covering the first portion tray 23 is inverted the top portion 22 is transformed 108 of the drainage channel 108 of the channel 107 into the base portion 2 and vice versa. 105 from becoming blocked up, for example, with mortar.

Figure 12 illustrates a stepped parapet cavitytray 24 The cover 111 is connected to the base portion 102 via in which the steps rise to the right. This can be inverted hinge 112 which enables the coverto pivot between a to produce a stepped parapet cavitytray 24 in which position in which it does not coverthe first portion 108 the steps rise to the left, as shown in Figure 13. Again, (as shown in the drawings), and a position in which it when the tray 24 is inverted the top portion 22 is 110 does not coverthe first portion 108 (not shown). The transformed into the base portion and vice versa. cover 111 extends slightly beyond the forward edge of Figures 14 and 15 illustrate right and left end parapet the base portion 102. The cover 11 is slightly larger cavitytrays 25 and 26 respectively. than the thickness of the firstwall.

Figure 16 illustrates a joining parapet cavitytray 40 Overflow means in the form of an overflow 113 is forjoining two other parapet cavity trays. 115 provided adjaceritthe intersection of the first portion Figures 17 to 19 illustrate three embodiments of 108 and the second portion 109 of the drainage lintel cavitytrays designated 27,28 and 29 respective- channel 107. The overflow 113 allowsthe drainage of ly. Each of the lintel cavitytrays 27,28 and 29 excess moisture,when the drainage channel 107 can comprises a base portion 30 provided with ribs31 accommodate no further moisture. The overflow which are similarto the ribs 13. A rearwall portion 32 120 means also includes a drip channel 11 4for collecting is provided along the rear edge of the base portion 30. moisture failing overthe overflow 113.

A side wall portion 33 is secured at one end of the tray It will be appreciated thatthe side wall portion 104 27,28 or 29to, boththe base portion 30 and the rear can be provided atthe opposite end of the base wall portia.n32. Afurtherside wall portion (notshown) portion 102tothatshown in Figure 5.

may. be provided atthe other end ofthetray27,28or 125 The rearwall portion 103 is provided with a 29. strengthening formation 115 disposed atthe end The rearwall portion 32 comprises a first part 34 remote from the side wall 104.

which extends substantially at right angles from the The base portion 102 is provided with depressions base portion 30, and a second part 35 which is 116 which extend to the level of the first channel disposed at an angle to the first part 34. 130 portion 108; the depressions 116 form feet for the 4 GB 2 189 275 A 4 cavity tray 101. arranged atangles of about201,30'and 459 respective Further embodiments of abutment cavity tray are lytothe horizontal.

shown in Figure 21. There are two types oftrayshown Figure40shows a horizontal cavitytray400for use inthis Figure: onetype are intermediate trays 200, and in refurbishment work. The tray comprises a base theothertype are endtrays201. Some ofthetrays200 70 portion 401 and a rearwall portion 402extending atan and 201 areshown only in outline. obtuse angle thereto. The base portion 4G1 is provided Thetrays 200 are similarto the trays 101 and like with ribs403, similartothe ribs 13, andthe rearwali parts have been designated with like reference numerportion is provided with formations 404, simflarto the als. The principal difference isthe provision of locating formations 5. The length of the tray400 is typicafty two means in theform of formations 202 provided on the 75 and one half bricks.

rearwall portion 103. Theformations 202 are similarto Thetray400 isfitted into a course of bricks in an theformations5. existing wall in thefollowing manner. Firstly, three Thetrays 201 are also similarto thetrays 101 and adjacent bricks in the course are removed and thetray like partsare designated with like reference numerals. 400 is inserted in the course. Two bricks arethen The principal difference isthe provision of formations 80 placed back in the course on thetray400, and a further 202 (asthetrays 201), and alsothe provision of two bricks are removed. Anothertray 400 is then another side wall portion 104. In addition, the drainage placed in the course nextto the firsttray 40O.This means is disposed substantially centrally of the base procedure can be repeated until the entire course has portion 102. been fitted with the cavity trays 400.

Claims (11)

1. Another embodiment of abutment cavity tray is 85 CLAIMS designated 210 in

   Figure 22. The abutmenttray210 1. A cavity tray for use in a wall structure having comprises abase portion 211 from which a rearwall first and second spaced wal Is defining a cavity portion 212 extends atan obtuse angle. therebetween, said tray comprising a cavity member Side walls 213 and 214 are provided at opposite adapted to extend into the cavity and adapted to ends of thetray 210. The heightof the sidewalls 213 90 collect moisture failing in said cavity, and locating and 214 is less than the height of the rearwall portion means adapted to locate the cavity tray in an 212. overlapping relationship with an adjacent cavity tray.

   Ribs 215 (similarto ribs 13) are provided on the base
2. 2. A cavity tray according to Claim 1, wherein the portion 211 andformations216 (similar to formations locating means also serves as retaining means to 5) are provided on the rearwall portion 212. 95 retain thecavitytrays in said overlapping relationship.

   Thetray 210 can be used as an end abutment cavity
3. 3. Acavitytray according to Claim 1 or 2, wherein tray. However it also has other uses. The tray 210 can the locating means is adapted to assist the positioning be cut along dotted line B to provide aright and left of a rowof bricks on top of the cavity member.

   hand short abutment cavity tray. The tray 210 can be
4. 4. A cavity tray according to any preceding claim, cut along dotted line Ato provide a medium length 100 wherein the locating means comprises at least one abutment cavitytray. The side wall 214 can be locating formation on the cavity tray adapted to removed in orderto provide a long abutment cavity cooperate with a respective locating formation on the tray. Thus, only one moulding is required to produce adjacent cavity tray.

   several different abutment cavity trays.
5. 5. A cavity tray according to Claim 4, wherein the In Figures 23 to 36 various embodiments of the 105 or each locating formation forms a projection on one horizontal, parapet and lintel cavity trays are shown face of the cavity tray and forms a recess on the positioned in a wall structure comprising a firstwall 50 oppositeface of the cavitytray.

   and a second wall 51.
6. 6. A cavity tray according to any preceding claim, In Figure 23the location formations 5 form an wherein the cavity member comprises abase portion abutment against which the bricks of the wall 50 can 110 adapted to be embedded in the first wall, and a rear be placed during the construction thereof. This helps wall portion adapted to extend into the cavity, the rear with the correct positioning of the bricks in the wall 50. wall portion being arranged at an obtuse angle to the The locating formations of the other embodiments of base portion.

   cavitytrays can also perform thisfunction.
7. 7. Acavitytray according to Claim 5, wherein the Figure 37 shows a plurality of abutment cavity trays 115 or each locating formation is provided on the rear wall and 201 in a gable abutment of a pitched roof portion, and/orthe base portion.

   structure 52.
8. 8. A cavity tray according to Claim 7, wherein the Figure 38 shows the interior horizontal cavitytray 15 or each locating formation on the rear wall portion is in in overlapping relationship with the straight horizon- alignment with the or each locating formation on the tal cavity tray 1, and slightly separated from one 120 base portion.

   another.
9. 9. A cavity tray according to Claim 6,7 or 8, Figure 39 shows three continuous stepped cavity wherein the base portion is conf ig u red to restrictthe trays 300,301 and 302, each positioned on a wall 306. flow of moisture overthe ends thereof by the Each tray 300,301 and 302 comprises abase portion provision of ribs or corrugations at the ends of the 303 having a rearwall portion 304 extending at an 125 base portion.

   obtuse angle thereto.
10. 10. A cavity tray according to Claim 9, wherein said Formations 305 (similarto formations 5) are pro- ribs or corrugations act as part of the locating means.

    vided on the rear wall portion 304. Ribs (not shown),
11. 11. A cavitytray substantially as herein described which are similarto the ribs 13 can be provided on the with reference to and as shown in the accompanying base portion 303. The trays 300,301and302are 130drawings.

    GB 2 189 275 A 5 Printed in the United Kingdom for Her Majesty's Stationery Office by the Tweeddale Press Group, 8991685, 10187 18996. Published at the Patent Office, 25 Southampton Buildings, London WC2A lAY, from which copies may be obtained.

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