GB2126307A - A purlin or joist connector - Google Patents
A purlin or joist connector Download PDFInfo
- Publication number
- GB2126307A GB2126307A GB08319249A GB8319249A GB2126307A GB 2126307 A GB2126307 A GB 2126307A GB 08319249 A GB08319249 A GB 08319249A GB 8319249 A GB8319249 A GB 8319249A GB 2126307 A GB2126307 A GB 2126307A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- ofthe
- connector
- purlins
- plates
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
- E04B1/2604—Connections specially adapted therefor
- E04B1/2612—Joist hangers
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
- E04B1/2604—Connections specially adapted therefor
- E04B2001/2692—End to end connections of elongated members along their common longitudinal axis
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The invention relates to a purlin or a joist connector 1, for connecting adjacent ends of two purlins or joists, formed from a single blank of metal and comprising two metal plates 5 and 6, means in the form of holes 7 for nails or screws and stops 8, 9 and 10 to limit the respective positions of the ends of the purlins or joists 2 and 3. <IMAGE>
Description
SPECIFICATION
A purlin or joist connector
The invention relates to a purlin orjoist connector.
Purlins orjoists are often made ofwood and in use
extend from an outer boundary wall of a building into the interior ofthe building, often for supporting floorboards. There are usually two purlins or joists extending towards each other from opposite boundary walls at any particular location in the building, the free ends ofthe meeting purlins orjoists being supported in a joist hanger. Such a joist hangerr usually comprises a "Z"-shaped piece of metal, the
lower limb of which supports one joist, the other being
received below the upper limb ofthe "Z", the other joist being supported by securing means such as nails driven through holes which are formed in side straps which extend between the upper and lower limbs.In order to secure the straps, their free ends are bent to overliethe upper limb and to underliethe lower limb, the bent over ends being secured as by being welded to the respective limbs. These bent over ends provide an uneven mounting for floor boards subsequently laid in position and also ensure that the whole joist hanger is expensive and complicated to manufacture.
It is an object of the invention to seekto mitigate this disadvantageofthe prior art.
According to the invention there is provided a connectorforconnecting adjacent ends oftwo purlins or joists extending in substantially the same plane, comprising a plate adapted to extend between respective adjacent outer surfaces of both purlins orjoists and including means for securing the plate to those outer surfaces and means to limit the respective positions ofthe purlins orjoists.
The connector may comprise two plates connected by a web to provide a substantially U-shaped sleeve, and each plate and the web may comprise respective means to limit the position of adjacent ends of aligned purlins orjoists. This construction provides for automatic alignment ofthe connector in the correct postion relative to the end of a joist.
The plates may be formed from a single blank of metal which when folded provides a first plate, a web or seat, a second plate substantially parallel to the first plate, the web or seat connecting the two plates, and aligned means of each plate and ofthe web or seat to limitthe position of adjacent ends of two purlins or joists connected by the connector in use thereof.
The means to limit the position may be a stop provided at one extremity ofthe plate or plates.
The stop may be integral with the plate and turned at substantially 900 to the plane of the plate out of one end ofthe plate.
The plate may comprise a seat which supports at least one of the purlins orjoists. Thus the purlin orjoist may be placed on the seat which may comprise a flange turned out of one side of the plate.
The plate may be adapted for combining with a similar plate to provide a sleeve which embraces the respective adjacent ends of the purlins orjoists in use.
The plates may be integral and parallel and may be connected by the seat which extends between both plates.
The plates may be formed from a single blank of metal which when folded provides a first plate, a seat, a second plate substantially parallel to the first plate, the seat connecting the two plates, and a stop at one end ofthe seat and at one end of the connector and stop means at the opposite end ofthe connector.
The stop means may comprisetwo stops bent inwardly of each plate.
The two stops may be at the same vertical height in use ofthe connector.
Each plate may have an inwardly directed flange substantially parallel to the seat and including means for securing to the upper surfaces ofthe two purlins or joists in use.
The flanges may extend overthe length of the respective plates and may each extend substantially to the centre ofthe connector.
Alternatively, the flanges may extend over partof the length ofthe respective plates, one flange being offset from the other longitudinally of the connector so that each extends substantially over the width of the connector without overlapping the other.
Connectors embodying the invention are diagrammatical ly illustrated, by way of example, with refer ence to the accompanying drawings.
Figs. 1, 1 and 3 are respective side elevational, end and plan views of one connector according to the invention;
Fig. 4 is to an enlarged scale a perspective view of the top of the connector of Figs. 1,2 and 3;
Fig. 5 is a schematic view of the connector of Figs. 1, 2,3 and 4 in use to connect together adjacent ends of two purlins or joists;
Fig. 6 is a plan view of a blank from which the connector of Figs 1-6 is made;
Fig. 7 is a viewsimilarto Fig. 4 showing the top of a second embodiment of connector;
Fig. 8 is a plan view of a blankformakingathird connector according to the invention;
Fig. 9 is an end elevational view of the connector of Fig. 7 andto a smallerscalethanthat Fig; and
Fig. 10 is a perspective view of the connector of Fig.
8 in use to connect cantilevered purlins or joists.
Referring firstly to Figs. 1-6, the connector 1 shown is for connecting adjacent ends of two purlins orjoists 2 and 3 (Fig. 5), the connector 1 being formed from a single blank4ofsheet metal such as mild steel.The connector 1 comprises two plates 5 and 6, a first one 5 being substantially parallel to the second plate 6 and including means in the form of holes 7 forsecuring the connectortothe purlins orjoists 2 and 3 and means in the form of stops 8,9 and 10 to limit the respective position ofthe purlins orjoists 2 and 3.
The plates 5 and 6 are connected by a lower, in use and as viewed, flange or seat 11 which is integral with them. Each plate 5 and 6 has at its upper end as viewed a bentoverflange 12extending overthelengthofthe plate and meeting substantially at the longitudinal centre line ofthe connectorl,theflanges having holes
12a.
The lower stop 8 is substantially centrally of the seat
11 and comprises a lug bent upwardly as viewed at substantially 90 thereto. The stops 9 and 10 comprise stop means in theform of lugs bent from the
respective plates 12 at substantially the same vertical position overthe height of the connector.
The holes 7 in one plate 5 are staggered or offset with respect to the holes 7 in the other6 plate so that when nailsare passedthrough the holes7 and are hammered into the purlins orjoists, from opposite sides, the nails do not touch.
In usethe connector 1 is offered up to and slipped over the free end of one joist so thatthe end face of the joist abuts the inner (to the right as viewed in Fig 1 and to the left as viewed in Fig. 5) face ofthe stop 8 and so that it abuts the outer (to the right as viewed in Fig. 1 and to the left as viewed in Fig. 5) face of the stops 9 and 10. The stops 8,9 and 10 limit the position ofthe purlin orjoist. The second joist 3 is then slipped into the connector 1, the second joist abutting the outer surface ofthe stop 8 and the inner surface ofthe stops 9 and 10 and is again limited in position longitudinaily by the stops 8,9 and 10.The ends ofthe joists thus essentially meet along the line"Y" (Fig. which isthe central line of the connector about which it is symmetrical.
Nails are hammered intothe joists2 and 3through the holes 7.
The separation of the plates 5 and 6 via the gap between the flanges 12 provides a certain flexibility when connecting the connector 1 and joists 2 and 3 and enables the plates 5 and 6to be moved orflexed transversely to the vertical plane in which they normally lie.
As shown in Fig. 5 substantially half of one plate 5 is secured to one joist 2 and halfto the other 3.
The connector 1 is formed from a blank 4 of metal (Fig. 6) which has two wings 13 and 14 and a centre portion 15. A projection 16 forms the stop 8 and projections 17 and 18 form the stops 9 and 10. For each projection on one side of the blank there is a corresponding recess 19, 1 9a, 1 9b on the opposite side. This is because indential blanks 4 shown can be stamped, cut or otherwise formed in an automatic process from a continuous strip of metal, the blank4 shown being complementary to an "nesting" with the blanks 4a and 4b (schematically shown) immediately preceding and succeeding it.Thus as the strip of metal is indexed through a forming tool, each blank 4 is cut, the recesses 19a and 19b providing the metal forthe lugs 17 and 18 of the immediately succeeding blankto be formed and the recess 19 being where the lug 16 of the immediately preceding blank was formed. This is shown schematically in dashed lines in Fig. 6. This process provides for virtually no wastage of material.
The hoXes7 areformed with the cutting outofthe blank, and are offset in each wing 13 and 14, so that the holes are not aligned in the two plates as previously described.
Each wing 13 and 14 is then folded about respective lines Rand S to provide the plates 5 and 6 and the projections 16,17 and 18 are folded about lines X to providethestops8,9 and 10.
The second connector 100 shown in Fig. 7 is similar to the first and is made from a single blank of material
in a similar way. However, the upper flanges comprise a flange 101 which extends over about half the length ofthe plate 5 and extends overthe width ofthe connectorfrom the plate 5 and a flange 102which similarly extends from the plate 6. One flange 101 is longitudinally offset with respect to the otherl 102 so that they do not overlap in the longitudinal sense but abut each other along a line 103 which is a transverse centre line ofthe connector. This embodiment provides more metal in which to locate holes 104, so providing asecurefixing means.
Referring now to Figs 8,9 and 10 ofthe drawings, there is shown in Figs. 9 and 10 a connector 201 for connecting adjacent butt jointed ends of two timber purlins orjoists 202 and 203, the connector 201 being made from a single blank 204 of metal such as hot dipped galvanised sheet steel to BS 2989,1955, Z2 quality, coating type "C", (Fig. 8).
The blank204 shown in Fig. 8 is formed from a strip of metal for example by stamping in a continuous operation forforming a plurality of identical blanks from the single strip, each blank 204 like the one shown being nested with the immediately preceding and succeeding blank.
Thus the edge 205 ofthe one blank is formed when the opposite edge 206 ofthe immediately preceding blank isformed.The width ofthe blank from edge 207 to edge 208 is the width ofthe strip. (Awider blank formed from wider strip is shown in dash lines 207', 208'). Thus there is no wastage of material and the blanks 204 can be stamped out in a continuous forming operation.
The blank204 has cutout ofitthree spaced U-shaped cut outs 209,210 and 211 into each of which a tab 212 projects, each tab 212 being joined to the remainder ofthe blank 204 along a respective fold or bend line 213, the fold lines 213 being aligned, or lining on a single plane. There are a series offold line 214,215,216,217 and 218 and 214',215',216',217', 218' at opposite sides of the central portion 219 of the blank 204 containing the central cut-out 209 and tab 212.The lateral parts orwings 220,221 are folded about a respective pair of lines 214,214' say to provide a central plate 219 ofthe required width to accept particularjoists widths four example 38mm, 44mm, 50mm, 63mm and 75mm.The spacing ofthe particular lines is just greater, in the embodiment shown by 3mm, than the width of the joist. For example lines 218,218' are spaced by 41 mm to accommodate 38mm thick joists. The extra width of metal is to provide a smooth bend. There is also a through hole 222, and means for securing the connector in the form of holes 223 and 223' for securing means such as nails.
The blank 204 is folded up about a part of line 214 etc, 214' etc so that the lateral parts orwings 220 and 221 are substantially parallel and form respective plates ofthe connector 201, the central part 219 forming a seat or web, connecting the plates 220 and 221. The connector 201 is thus of channel or U-shape.
The tabs 212 are bent about the respective lines 213 so that they are respectively substantially at 90 to their respective plate 220 or 221 or web 219 and in the same plane, the tabs 212 forming stop means or lugs which are directed to the interior of the channel (Figs. 9,10).
The connector 201 formed from the blank is used for connecting adjacent ends of the two purl ins or joists 202 and 203 extending in substantially the same plane, the ends being buttjointed. In use, the free end ofthe cantilevered purlin or joist202 is inserted between the plates 220 and 221 so that it butts up againstthe inner (to the left as viewed in Fig. 10), surfaces ofthe stop means formed by tabs 212. Securing means such as nails are then hammered through the holes 223 into the joist 202 to secure it and the connectortogether.
The part of each plate andweb to the right of the tabs 212 (as viewed in Fig. 10) then projects beyond the free end of the joist. The end of the joist 203 to be butt jointed with the free end ofthe joist 202 is then inserted inttheconnector201, between the plates 220 and 221 and seating on the web 219 and butted up against the stop means 212. Securing means such as nails are then inserted in the holes 223 and hammered into the joist 203. The joists 202 and 203 are then connected together. The right hand end (not shown) of the joist 202 rests on a wall or beam (also not shown) parallel to the wall supporting the joist.The lugs 212, by butting againstthe adjacent ends, automatically align the connector 201 in the correct position relative to the end ofthe firstjoist ready to receive the joist to be aligned with the second joist and connected bythe connector 201. The connector provides for self-location of two joists connected axially, very accurately.
The holes 223 and 223' in the plate 220 are staggered or offsetfrom the equivalent holes in the plate 221 so that nails through holes 223 and 223' in the plate 220 do not interfere with nails through the holes 223 and 223' in the plate 221.
It will be understood that the connector 201 may be mounted on the joist 203 before connecting that joist 203 with the joist 202.
Although holes 7,223 and nails have been described as means ofsecuring the connectorto the joists, they could be replaced by equivalent means such astangs orteeth (not shown) struck out of the plates.
Claims (13)
1. Aconnectorforconnecting adjacentendsof two purlins orjoists extending substantially in the same plane, comprising a plate adapted to extend between respective adjacent outer surfaces of both purlins orjoists and including means for securing the plate to those outer surfaces and means to limitthe respective postions of the purlins and joists.
2. A connector according to Claim 1, comprising two plates connected by a web to provide a substantially U-shaped sleeve, each plate and the web comprising respective means to limitthe position of adjacent ends of aligned purlins orjoists.
3. A connector according to Claim 2, the plates being formed from a single blank of metal which when folded provides a first plate, a web or seat, a second plate substantially parallel tothefirst plate, the web or seat connecting the two plates, and aligned means of each plate and ofthe web or seatto limitthe position of adjacent ends of two purlins or joists connected bytheconnectorin use thereof.
4. A connector according to any preceding claim, the means to limit the position comprising a stop provided at one extremity ofthe plate or plates.
5. A connector according to Claim 4, the stop being integral withthe or each plate and turned at substantially 900 to the plane ofthe plate out of one end ofthe plate.
6. A connector according to Claim S, there being two stops at substantially the same vertical height of the connector in use.
7. Aconnector according to any of Claim 2 to 6, each plate comprising an inwardly directed flange substantially parallel to the seat and including means for securing to the u pper su rfaces of the two purlins or joists in use.
8. A connector according to Claim 7, the flanges extending over the length ofthe respective plates and each extending substantiallyto the centre of the connector.
9. A connector according to Claim 7, the flanges extending over part ofthe length ofthe respective plates, one flange being offsetfrom the other longitudinally ofthe connector so that each flange extends substantially overthe width ofthe connector without overlapping the other.
10. A connector according to any preceding claim, the means for securing comprising through holesthroughtheoreach plate.
11. A connector according to any one of Claims 1 to 3,the means to limit the position of the purlins or joists comprising stop means intermediate the length of the plates and/or the web.
12. Aconnectorforconnecting adjacent ends of two purlins or joists extending substantially in the same plane, substantially as hereinbefore described with reference to Figs. 1 to 6,7, or 8 to 10 ofthe accompanying drawings.
13. A method of making a connector according to any preceding claim, from a blank according to Claim 2, comprising turning opposite spaced edge portions ofthe blank in the same direction out of the plane of the blank to provide substantially parallel plates and a web connecting same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08319249A GB2126307A (en) | 1982-07-16 | 1983-07-15 | A purlin or joist connector |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8220730 | 1982-07-16 | ||
| GB8235464 | 1982-12-13 | ||
| GB08319249A GB2126307A (en) | 1982-07-16 | 1983-07-15 | A purlin or joist connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8319249D0 GB8319249D0 (en) | 1983-08-17 |
| GB2126307A true GB2126307A (en) | 1984-03-21 |
Family
ID=27261666
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08319249A Withdrawn GB2126307A (en) | 1982-07-16 | 1983-07-15 | A purlin or joist connector |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2126307A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2141460A (en) * | 1983-06-18 | 1984-12-19 | Press Bat Holdings Ltd | Method of butt jointing timbers in a building and splice plate for performing the method |
| EP0210744A1 (en) * | 1985-07-23 | 1987-02-04 | Press-Bat Holdings Limited | Joist hanger, return and straddle type joist hangers |
| GB2202604A (en) * | 1987-03-23 | 1988-09-28 | Metpost Ltd | Joining posts |
| WO2001023684A1 (en) * | 1999-09-24 | 2001-04-05 | Weeks Peacock Quality Homes Pty Ltd | A truss tie-down method and apparatus |
| EP1300522A1 (en) * | 2001-10-08 | 2003-04-09 | Placoplatre | Hanger foot for a ceiling frame, hanger with such a foot and assembly comprising a ceiling frame and such a hanger |
| FR2831572A1 (en) * | 2001-10-29 | 2003-05-02 | Serge Daniel Robin | Hooking and suspension device for false ceiling I section holders comprises steel casing drilled with central hole for screws connected to height adjusting cradle |
| AU767846B2 (en) * | 1999-09-24 | 2003-11-27 | Steel Building Systems Australia Pty Ltd | A truss tie-down method and apparatus |
| GB2457205B (en) * | 2006-12-01 | 2012-07-25 | Simpson Strong Tie Internat Inc | Floor or joist support/reinforcement system, and support/reinforcement therefor |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109898650A (en) * | 2017-12-11 | 2019-06-18 | 美建建筑系统(中国)有限公司 | A kind of steel construction grit connect system with main structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB977164A (en) * | 1962-11-14 | 1964-12-02 | Timber Engineering Co | Improvements in and relating to joist connectors for wooden buildings |
| GB1101996A (en) * | 1964-10-23 | 1968-02-07 | Neolith Ltd | Improvements in or relating to suspended ceilings |
| GB2070184A (en) * | 1980-02-23 | 1981-09-03 | Press Bat Holdings Ltd | Cantilever bracket for joining joists end to end |
-
1983
- 1983-07-15 GB GB08319249A patent/GB2126307A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB977164A (en) * | 1962-11-14 | 1964-12-02 | Timber Engineering Co | Improvements in and relating to joist connectors for wooden buildings |
| GB1101996A (en) * | 1964-10-23 | 1968-02-07 | Neolith Ltd | Improvements in or relating to suspended ceilings |
| GB2070184A (en) * | 1980-02-23 | 1981-09-03 | Press Bat Holdings Ltd | Cantilever bracket for joining joists end to end |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2141460A (en) * | 1983-06-18 | 1984-12-19 | Press Bat Holdings Ltd | Method of butt jointing timbers in a building and splice plate for performing the method |
| EP0210744A1 (en) * | 1985-07-23 | 1987-02-04 | Press-Bat Holdings Limited | Joist hanger, return and straddle type joist hangers |
| GB2202604A (en) * | 1987-03-23 | 1988-09-28 | Metpost Ltd | Joining posts |
| GB2202604B (en) * | 1987-03-23 | 1990-11-14 | Metpost Ltd | Post joining means |
| US6742310B1 (en) | 1999-09-24 | 2004-06-01 | Weeks Peacock Quality Homes Pty. Ltd. | Truss tie-down method and apparatus |
| AU767846B2 (en) * | 1999-09-24 | 2003-11-27 | Steel Building Systems Australia Pty Ltd | A truss tie-down method and apparatus |
| WO2001023684A1 (en) * | 1999-09-24 | 2001-04-05 | Weeks Peacock Quality Homes Pty Ltd | A truss tie-down method and apparatus |
| US6843028B2 (en) * | 1999-09-24 | 2005-01-18 | Weeks Peacock Quality Homes Pty. Ltd. | Truss tie-down method and apparatus |
| EP1300522A1 (en) * | 2001-10-08 | 2003-04-09 | Placoplatre | Hanger foot for a ceiling frame, hanger with such a foot and assembly comprising a ceiling frame and such a hanger |
| FR2830554A1 (en) * | 2001-10-08 | 2003-04-11 | Placoplatre Sa | SUSPENT FOOT FOR CEILING FRAME, SUSPENT WITH SUCH A FOOT AND SET INCLUDING ONE CEILING FRAME AND AT LEAST ONE SUSPENT |
| US7200971B2 (en) | 2001-10-08 | 2007-04-10 | Placoplatre | Suspender bottom bracket for ceiling frameworks, a suspender having this kind of bottom bracket, and an assembly comprising a sealing framework and at least one such suspender |
| FR2831572A1 (en) * | 2001-10-29 | 2003-05-02 | Serge Daniel Robin | Hooking and suspension device for false ceiling I section holders comprises steel casing drilled with central hole for screws connected to height adjusting cradle |
| GB2457205B (en) * | 2006-12-01 | 2012-07-25 | Simpson Strong Tie Internat Inc | Floor or joist support/reinforcement system, and support/reinforcement therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8319249D0 (en) | 1983-08-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |