CA2531882A1 - Improved hanger - Google Patents
Improved hanger Download PDFInfo
- Publication number
- CA2531882A1 CA2531882A1 CA002531882A CA2531882A CA2531882A1 CA 2531882 A1 CA2531882 A1 CA 2531882A1 CA 002531882 A CA002531882 A CA 002531882A CA 2531882 A CA2531882 A CA 2531882A CA 2531882 A1 CA2531882 A1 CA 2531882A1
- Authority
- CA
- Canada
- Prior art keywords
- joist
- hanger
- mounting means
- projection
- flange
- 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.)
- Abandoned
Links
- 239000002184 metal Substances 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 239000002023 wood Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 101100173447 Caenorhabditis elegans ger-1 gene Proteins 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011120 plywood Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/12—Load-carrying floor structures formed substantially of prefabricated units with wooden beams
-
- 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
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
- E04B5/14—Load-carrying floor structures formed substantially of prefabricated units with beams or girders laid in two directions
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Floor Finish (AREA)
Abstract
A hanger for connecting two adjacent members, such as I-Joists used in the construction industry. The hanger locates the members at approximately 90 degrees to each other and comprises a mounting means in the form of a plate for connection to a first member and support means connected to the mounting means to support a second member perpendicular to the first member. Embodiments are disclosed including features of stiffening ribs, tapered edges, and support feet to increase the load bearing capacity of the hanger.
Description
- _-._ CA 02531882 2005-12-30 IMPFcOVED .zi~NGER
This inventior_ relates to a.n improved hanger for us=
particularlv nut not exclusively in connecting together two adjacent members suet as z-Jcists or cor~necting a beam to an I-Joist generally at a 9o degree angle and has a particular application in the ccnsLruction industry.
It is well lsnown within the coxzstruction industry that ID wooden i-Joists ars used as a replac~ment for traditional solid timber baams , and ~th=_i~~ usage is made al 1 the more popular due to their dimensional stability (no shrinlcage, cupping cr distortion) and superior load handling caz~acity (spanning ca~abil:ity) . Wooden T-JCists 1~ tX-picall~~ consist. of upper and lower rectangular flange membexs made of either solid c:.~ laminated wood, and a cer~tral wood-based web member (typically plywood of oriented strand board) glued centrally between these upper and lo~re_~ flanges into pre-cut grooves. Typically 20 suet jcists are around 25 cm prom flange to =lang~, the flanges being around 4 cm to 6 cm wine.
The wooden I-Joist is an extremely efficient structural shape but the gap that e~ciszs between the central web 25 member and th=_ upper and lower Tlanges makes it difficult to connect components to them at 90 depress.
Unfortunately, the reed to connect components a9p degrees is common_lacs in domestic house construction, r ~ f o,~ examp l a - r a a v~he , yloo - or roof m mb rs n d to be ~0 trimmed around stair er chimnay opezlings. Inched, almost every exampl= of domestic house construction will require beam connections at 90 degrees to each ether.
__ _._ CA 02531882 2005-12-30 z To form a 90 decree connection to an I-Joist requires the gap bAtween the web and both flanges to be packed or filled with a solid material, wood fcr example, such that a flush surface is created of sufficient area to receive an incoming beam yr other structural member. These wood-based packing pieces, provided to facilitate such a 90 degree connection are called "backer blocks".
Where a number of beams need to be connected to a cross membex, knowm as a "header", at 90 degrees, e.g_ where floor beams are trimmed around a staii opening, then multiple backer blocks or a continuous baclcer blocl~= will be required. Metal hangers are then used t0 Connect the incoming beams) to the supporting header beam at 90 degrees. Thsse can be either face-fixed directly to the backer block material or tap-fi~:ed tv the upper flange of the I-Joist where less nails are reguired into the backe_~
bloc)c .
Top ~iy hangers are generally used for light/medium duty applications as th~~T have limited load-transferring ability but are relatively quick and easy to install-These hangers have an upper flange which szts on top of the uppe_- surface of the upper flaxige cf the z-Joist in use- Face-fig: hangers aie typically used fcr highsr load application, but are generally mor° time consuming and expensive to fit: Such hangers have no upper flange sitting on the upper suiface of the upper flange cf the I-Joist but are attachsd only on the front Lace cf the joist In th°_ case oz conventional race-fia: cozznections, multiple nails are provided through the race o. the danger into the backe_- bloc) . The backer blvclc then t -.-- _ CA 02531882 2005-12-30 . 3 transfers the loads imparted by the hanger (from the incoming b~a~cn) into the cer~tral web of the I-Joist and thereby into the flanges of th~ I-Joist hsader.
In the case of the top-fig: connection nails are passed through the top and side flanges of the hanger -nto the upper flange of the header, as well as additional nails being provided through the si3e flanges into the backer block. As a significant amount of the load from the 2D hanger is being imposed eccentrically onto one side of the header upper flange, the backer block this time helps to prevent the upper flange from rotating as will as transmitting load from the face of the backer block into the central ~aeb .
ZJ
However, backer blocks are rather difficult, time consuming and costly to install in practice. Typical fixing specifications require backer blocks to be provided on both sides of an I-Joist ~>eb, with 6 long 20 nails being installed from each side with their protruding points folded (clenched) over. E~~erierzce rkas shown that this is one of thA most common. sources of on site errors when constructing I-~?oist floors, due to either incorrect types or numbers of nails being used to . 25 fix backer blocks in position.
A number of hangers are disclosed in the prior art. It has been proposed to extend the upper flange of the hanger which sits on. the top surface of the I-Joist to 30 surround the rear face of the I-Jcist also in order to provide additional stability to th= hanger. Tn~hilst these hangers go some way as to address the problsms discussed above, there remains room for further improvement of the a hangers to support a-Joists and transfer the load carried by such joists.
It is there=ore an object of the present invention to provide an improved hanger which overcomes or at least mitigates the problems discussed above_ According to one aspect oz the pxasent inver~.tion there is provided a hanger adapted for mounting on an I-Joist, the hanger comprising mounting means connectable to the beam, support means projecting outwards from the mounting means and defining a support for an end section of a reinforcement member, I-Joist or other beam, the mounting means comprising a projection provided at substantially 90 degrees ~to the mounting means and adapted for insertion between the upper and lower =langes of the I-Joist.
Advantageously, the moux~tiz~g msans comprises a metal plate having at least one fixing apertur°_ Conveniently the width o_ the projection is about half the widtr of the mounting means.
Advantageously the mounting means is provided with a projection on a ther side of the support means.
praferablv, a fi~:ing aperture is provided on the mounting means substantially at or below the lower edge cf the projection.
Advantageously the support means compris=s two side walls an3 a base which. project from the mounting means in the form cz a. stirrup.
_._ CA 02531882 2005-12-30 .
Conveniently, the upper arid lowez edges of the projection are tapered to allow for oase of insertion of the projection between tho upper ar~.d lower flanges of the I
Joist_ preferably, at least one of the upper er lower edges of the projection is formed with a foot which extends substantially perpendicular to the projection such that in use the foot lips along a flange of the I-joist.
One embodiment of the present invention will now be described with reference to and as show in the accampanying dr a~.rings in whi ch '15 Figure 1 is a perspective view of a joist hanger according to one aspect cf the present in~ex~tion;
~'igure 2 is a schematic side view ef the j oist hanger of figure 1;
Figure 3 is a schematic side view o' a joist hanger according to a second embodiment of the present invention;
Figure 4 is a perspective view of a third embodiment of the present itmenticr_;
~'igurss 5a-5d axe side ~riews oz alternative fixing m~thods for uss with joist hangers accoraing to the present invention;
Figure 6 is a perspective: view of the joist hangei of figure 1 with an additional fi~:ing means;
Figure '7 is a side view of the joist hanger of figure 6;
Figure ea shows the effect of wood splitting with 5 Conventional joist hangers;
Figure Bb shows one advantage of the present inventior~ zn preventing wood splitting, and Figure 9 shows a perspective view of a further embodiment of the present inventior~.
Turning now to Figure I, there is shown an embodiment of the present invention showing a hanger 1 for use in 1~ connecting a beam (not sh.ow~2) to an T-Joist 2 at substantially 90 degrees. The T-Joist comprises upper and dower flanges 3,4 corinected by a central web 5 as described above.
The har~ger 1 comprises a mounting plate 6 which is adapted to be mounted on the front face 7 of the upper and lower rl.anges of the I-joist and a U-shaved support member a which proj ects outwards from the mounting p~,ate for supporting a beam or other load carrying member.
The mounting plate 6 is substantia7.ly rectangular in ~orm and extends from the top edge o= the upper flange ef the I-~ois~ to the bottom edge of the lower ~laxzge. A return flange 9 may be provided on the upper edge cf the mounting plate, as shown in figure 1, in which the top edge of the rctounting plate is folded through 90 degrees to 1i~ along the top sur~ace of the upper flange 3 0~ the I-Jolst_ ._____ _ _, CA 02531882 2005-12-30 Apertures 10 are provided in the mounting plate for receiving fixing means (not shown) such as nails or screws for fixing the mounting plate to the front face ef the I-Joist against the upper and lower flanges thereof.
The support member B is formed of two side walls 29 connected together at the lower end by a base member 10.
The side walls have a first lower region 11 w~,ich in use is located adjacent the lower flange 4 of the I-Joist, in which the walls 29 have a substantially uniform width and a second upper region 12 in which the thickness of the walls 29 reduces from the end adjacent to the base member 10 towards the end of the walls 29 remote therefrom.
Apertures 13 are provided in the side walls 29 towards the upper edge of the walls to receive fixing means (not shown) such as nails or screws as will be described further below.
The central region 14 0~ the mounting membex adjacent the side walls of the suppoxt member is folded through substantially 90 degrees towards the side of the hanger remote from the support B means to form a rib 15 which, when the hanger is mounted on a joist 2 as shown in pigure 1, extends towards the central web 5 of the I-Joist as will be described further below. The width of the rib 15 is approximately half of the width of the mounting member 6. The length of the rib 15 is selected to be substantially the same as the distance between the upper and lower flanges 3,4 of the I-Joist to which the hanger is intended to be mounted. Whilst only a single rib is shown in the drawings, a similar rib may be provided on each side of the hanger.
~nlhen it is zequired to join a beam at 90 degrees to an I-Joist, a hanger 1 according to one aspect of the present invention is mounted to the front face of the Z-Joist 2, the upper edge of the. mounting means 6 being placed against the upper flange 3 of the I-Joist and the lower edge of the mounting means being placed against the lower flange 4 of the I-Joist. Fixing means (not shown) such as nails are introduced through the apertures 10 in the mounting member and extend into the upper and lower flanges of the I-Joist. The stiffening rib 15 lies between the upper and lower flanges 3,4 of the I-Joist 2.
A beam (not shown) is then introduced into the support member 6 of the hanger 1 and fixing means (not shown) such as nails are introduced through the apertures 13 in the side walls 29 of the support member 8 and into the beam.
The stiffening ribs 15 of the hanger have the effect of assisting in preventing the top flange 3 of the I-Joist 2 from rotating when loads are applied to the hanger 1 and thereby considerably enhances the load carrying capacity of the connection.
In one embodiment of the invention as shown in Figure 3, th4 upper and lower edges 16 of the stiffening rib 15 are tapered away from the mounting member 6 slightly to ensure that the stiffening rib 15 bites into the bottom edge of the top flange 3 of the I-Joist and the top edge of the bottom flange 4 as the hanger 1 is pushed onto the front face of the I-Joist 2.
This tight fit ensures that the stiffening rib 15 engages with the top and bottom flanges 3,4 of the I-Joist immediately and thereby transfers load bAtween them equal l y _ I'he rib 15 transfers rotational forces imposed on the too flange 3 of the I-Joist to the bottom flange 4 of the Joist thereby sharing the force between the two flanges instead cf this being carried by the top flange alor~,e_ Furthermore, the stiffening rib 15 stifXens the metal comprising the mounting means 6 of the hanger which assists in preventing the mounting means which abuts the face of the I-Joist from buckling_ The stiffening rib 15 as described above can ba used t~o create I-Joist connections which do not need backei blocks fixed to the I-Joist web 5 to prevent the top zlangs 3 cf the I-Joist from rotat2ng_ the hanger of the present invention has all of the advantages of currently available hangers but with a.ncreased load capacity over such hangers.
The increased efficiency in dealing with ~-otatiox~al forces on the I-Joist flanges 3,4 also means that a haziger according to the present invention. can be adapted for use in face-fi~> or top-fix operations. An embodiment of the present invention, inccrporatea into a face fix hanger is shown in Figure 4. The stiffening rib 15 of the hanger effectively resists this rotation as a backei block would do thus enabling either face fix cr top fia or k~rap around hangers to be used for T-Joist connections :~0 without the need for backer blocks.
Figure 5 i7.lustrates diff~rent embodiments of the present inventi-oz~ providing fac~-fig:, top-fi~~, or wrap around hangers which can be used wi~h Conventional I-Joists . . ... . _ _ , 10 without the need zor ba;.ker blocks . The load car~-vir~.g capacity of each ct these embodiments of the present invention is increased with. iespect to known hangers which are riot provided with the stiffer~ing rib 15 as described.
A fu:.°ther improvement in the hangers of the present invention is shown in Figur~ 6. In this embodiment a further aperture 17 is provided in the mounting plat°_ 6 to of the hanger for an additional nail 1B to be placed through the mounting means and into the lower flange a of the I-~oist_ The aperture 17 is provided adjacent to the bottom corner of the stiffening rib 15 adjacent the mounting means. When the additional nail is inserted into the T-Joist, this serves as a metal bearing for the edge of the stiffening zib I5 as it tries to push into the edge of the z-Joist bottom flange 4.
Such a nail inserted immediately below the lower °dge of 2o the stiffening rib 15 as shown in Figure 7 spreads the compression forces over a greater area and prevents the stiffening rib from biting into the Lop sur~ace of the bottom flange 4 oY the I-Joist so easily and quickly.
This enhances the load-Yarr~ring capacity of the connection even further.
It ~,~ill of course be appreciated that ordinarily a nail driven through an T_-Joist flange 3,4 at this position would split the solid timber of laminated timber forming the I-Joist flange as shown in Figure 8a, however because the stiffenin5 rib 15 is provided immediately above the top of the I-Joist bottom flanae a, and .n tight contact with it, the stiffening rib ~ 5 serves to prevent the top . . . 11 fibres of the flange from lif~ing upwards and therefor no splitting occurs as shown in figure Ob.
A furthei embodiment of the invention is shown in figure 9 wherein onE or both ends of the stiffening rib 15 is formed with a foot 19 which projects ourwardl~~ az substantially 90° from the stiffening rib. ~~hen the hanger is mounted on an I-joist, the foot lies along the top surface of the bottom flange and prevents the e~areme edge of the s t i f f ~n ing rib f rcm bedding into the f 1 anger s cf the T-jcist as soon aJ the hanger is applWd to the I-joist. Additional fixing means (not shown) such as a nail may be used to further secure the foot of the stiffening rib in position on the I-joist rlange.
'! 5 Tt uPil? b~ appreciated that the features of the present invention result in a hanger which has an inc=egsed load bearing ability without the need for additional backer blocks used to pacl~ out the I-Joist and this in tuin provides a more cost effective connection.
This inventior_ relates to a.n improved hanger for us=
particularlv nut not exclusively in connecting together two adjacent members suet as z-Jcists or cor~necting a beam to an I-Joist generally at a 9o degree angle and has a particular application in the ccnsLruction industry.
It is well lsnown within the coxzstruction industry that ID wooden i-Joists ars used as a replac~ment for traditional solid timber baams , and ~th=_i~~ usage is made al 1 the more popular due to their dimensional stability (no shrinlcage, cupping cr distortion) and superior load handling caz~acity (spanning ca~abil:ity) . Wooden T-JCists 1~ tX-picall~~ consist. of upper and lower rectangular flange membexs made of either solid c:.~ laminated wood, and a cer~tral wood-based web member (typically plywood of oriented strand board) glued centrally between these upper and lo~re_~ flanges into pre-cut grooves. Typically 20 suet jcists are around 25 cm prom flange to =lang~, the flanges being around 4 cm to 6 cm wine.
The wooden I-Joist is an extremely efficient structural shape but the gap that e~ciszs between the central web 25 member and th=_ upper and lower Tlanges makes it difficult to connect components to them at 90 depress.
Unfortunately, the reed to connect components a9p degrees is common_lacs in domestic house construction, r ~ f o,~ examp l a - r a a v~he , yloo - or roof m mb rs n d to be ~0 trimmed around stair er chimnay opezlings. Inched, almost every exampl= of domestic house construction will require beam connections at 90 degrees to each ether.
__ _._ CA 02531882 2005-12-30 z To form a 90 decree connection to an I-Joist requires the gap bAtween the web and both flanges to be packed or filled with a solid material, wood fcr example, such that a flush surface is created of sufficient area to receive an incoming beam yr other structural member. These wood-based packing pieces, provided to facilitate such a 90 degree connection are called "backer blocks".
Where a number of beams need to be connected to a cross membex, knowm as a "header", at 90 degrees, e.g_ where floor beams are trimmed around a staii opening, then multiple backer blocks or a continuous baclcer blocl~= will be required. Metal hangers are then used t0 Connect the incoming beams) to the supporting header beam at 90 degrees. Thsse can be either face-fixed directly to the backer block material or tap-fi~:ed tv the upper flange of the I-Joist where less nails are reguired into the backe_~
bloc)c .
Top ~iy hangers are generally used for light/medium duty applications as th~~T have limited load-transferring ability but are relatively quick and easy to install-These hangers have an upper flange which szts on top of the uppe_- surface of the upper flaxige cf the z-Joist in use- Face-fig: hangers aie typically used fcr highsr load application, but are generally mor° time consuming and expensive to fit: Such hangers have no upper flange sitting on the upper suiface of the upper flange cf the I-Joist but are attachsd only on the front Lace cf the joist In th°_ case oz conventional race-fia: cozznections, multiple nails are provided through the race o. the danger into the backe_- bloc) . The backer blvclc then t -.-- _ CA 02531882 2005-12-30 . 3 transfers the loads imparted by the hanger (from the incoming b~a~cn) into the cer~tral web of the I-Joist and thereby into the flanges of th~ I-Joist hsader.
In the case of the top-fig: connection nails are passed through the top and side flanges of the hanger -nto the upper flange of the header, as well as additional nails being provided through the si3e flanges into the backer block. As a significant amount of the load from the 2D hanger is being imposed eccentrically onto one side of the header upper flange, the backer block this time helps to prevent the upper flange from rotating as will as transmitting load from the face of the backer block into the central ~aeb .
ZJ
However, backer blocks are rather difficult, time consuming and costly to install in practice. Typical fixing specifications require backer blocks to be provided on both sides of an I-Joist ~>eb, with 6 long 20 nails being installed from each side with their protruding points folded (clenched) over. E~~erierzce rkas shown that this is one of thA most common. sources of on site errors when constructing I-~?oist floors, due to either incorrect types or numbers of nails being used to . 25 fix backer blocks in position.
A number of hangers are disclosed in the prior art. It has been proposed to extend the upper flange of the hanger which sits on. the top surface of the I-Joist to 30 surround the rear face of the I-Jcist also in order to provide additional stability to th= hanger. Tn~hilst these hangers go some way as to address the problsms discussed above, there remains room for further improvement of the a hangers to support a-Joists and transfer the load carried by such joists.
It is there=ore an object of the present invention to provide an improved hanger which overcomes or at least mitigates the problems discussed above_ According to one aspect oz the pxasent inver~.tion there is provided a hanger adapted for mounting on an I-Joist, the hanger comprising mounting means connectable to the beam, support means projecting outwards from the mounting means and defining a support for an end section of a reinforcement member, I-Joist or other beam, the mounting means comprising a projection provided at substantially 90 degrees ~to the mounting means and adapted for insertion between the upper and lower =langes of the I-Joist.
Advantageously, the moux~tiz~g msans comprises a metal plate having at least one fixing apertur°_ Conveniently the width o_ the projection is about half the widtr of the mounting means.
Advantageously the mounting means is provided with a projection on a ther side of the support means.
praferablv, a fi~:ing aperture is provided on the mounting means substantially at or below the lower edge cf the projection.
Advantageously the support means compris=s two side walls an3 a base which. project from the mounting means in the form cz a. stirrup.
_._ CA 02531882 2005-12-30 .
Conveniently, the upper arid lowez edges of the projection are tapered to allow for oase of insertion of the projection between tho upper ar~.d lower flanges of the I
Joist_ preferably, at least one of the upper er lower edges of the projection is formed with a foot which extends substantially perpendicular to the projection such that in use the foot lips along a flange of the I-joist.
One embodiment of the present invention will now be described with reference to and as show in the accampanying dr a~.rings in whi ch '15 Figure 1 is a perspective view of a joist hanger according to one aspect cf the present in~ex~tion;
~'igure 2 is a schematic side view ef the j oist hanger of figure 1;
Figure 3 is a schematic side view o' a joist hanger according to a second embodiment of the present invention;
Figure 4 is a perspective view of a third embodiment of the present itmenticr_;
~'igurss 5a-5d axe side ~riews oz alternative fixing m~thods for uss with joist hangers accoraing to the present invention;
Figure 6 is a perspective: view of the joist hangei of figure 1 with an additional fi~:ing means;
Figure '7 is a side view of the joist hanger of figure 6;
Figure ea shows the effect of wood splitting with 5 Conventional joist hangers;
Figure Bb shows one advantage of the present inventior~ zn preventing wood splitting, and Figure 9 shows a perspective view of a further embodiment of the present inventior~.
Turning now to Figure I, there is shown an embodiment of the present invention showing a hanger 1 for use in 1~ connecting a beam (not sh.ow~2) to an T-Joist 2 at substantially 90 degrees. The T-Joist comprises upper and dower flanges 3,4 corinected by a central web 5 as described above.
The har~ger 1 comprises a mounting plate 6 which is adapted to be mounted on the front face 7 of the upper and lower rl.anges of the I-joist and a U-shaved support member a which proj ects outwards from the mounting p~,ate for supporting a beam or other load carrying member.
The mounting plate 6 is substantia7.ly rectangular in ~orm and extends from the top edge o= the upper flange ef the I-~ois~ to the bottom edge of the lower ~laxzge. A return flange 9 may be provided on the upper edge cf the mounting plate, as shown in figure 1, in which the top edge of the rctounting plate is folded through 90 degrees to 1i~ along the top sur~ace of the upper flange 3 0~ the I-Jolst_ ._____ _ _, CA 02531882 2005-12-30 Apertures 10 are provided in the mounting plate for receiving fixing means (not shown) such as nails or screws for fixing the mounting plate to the front face ef the I-Joist against the upper and lower flanges thereof.
The support member B is formed of two side walls 29 connected together at the lower end by a base member 10.
The side walls have a first lower region 11 w~,ich in use is located adjacent the lower flange 4 of the I-Joist, in which the walls 29 have a substantially uniform width and a second upper region 12 in which the thickness of the walls 29 reduces from the end adjacent to the base member 10 towards the end of the walls 29 remote therefrom.
Apertures 13 are provided in the side walls 29 towards the upper edge of the walls to receive fixing means (not shown) such as nails or screws as will be described further below.
The central region 14 0~ the mounting membex adjacent the side walls of the suppoxt member is folded through substantially 90 degrees towards the side of the hanger remote from the support B means to form a rib 15 which, when the hanger is mounted on a joist 2 as shown in pigure 1, extends towards the central web 5 of the I-Joist as will be described further below. The width of the rib 15 is approximately half of the width of the mounting member 6. The length of the rib 15 is selected to be substantially the same as the distance between the upper and lower flanges 3,4 of the I-Joist to which the hanger is intended to be mounted. Whilst only a single rib is shown in the drawings, a similar rib may be provided on each side of the hanger.
~nlhen it is zequired to join a beam at 90 degrees to an I-Joist, a hanger 1 according to one aspect of the present invention is mounted to the front face of the Z-Joist 2, the upper edge of the. mounting means 6 being placed against the upper flange 3 of the I-Joist and the lower edge of the mounting means being placed against the lower flange 4 of the I-Joist. Fixing means (not shown) such as nails are introduced through the apertures 10 in the mounting member and extend into the upper and lower flanges of the I-Joist. The stiffening rib 15 lies between the upper and lower flanges 3,4 of the I-Joist 2.
A beam (not shown) is then introduced into the support member 6 of the hanger 1 and fixing means (not shown) such as nails are introduced through the apertures 13 in the side walls 29 of the support member 8 and into the beam.
The stiffening ribs 15 of the hanger have the effect of assisting in preventing the top flange 3 of the I-Joist 2 from rotating when loads are applied to the hanger 1 and thereby considerably enhances the load carrying capacity of the connection.
In one embodiment of the invention as shown in Figure 3, th4 upper and lower edges 16 of the stiffening rib 15 are tapered away from the mounting member 6 slightly to ensure that the stiffening rib 15 bites into the bottom edge of the top flange 3 of the I-Joist and the top edge of the bottom flange 4 as the hanger 1 is pushed onto the front face of the I-Joist 2.
This tight fit ensures that the stiffening rib 15 engages with the top and bottom flanges 3,4 of the I-Joist immediately and thereby transfers load bAtween them equal l y _ I'he rib 15 transfers rotational forces imposed on the too flange 3 of the I-Joist to the bottom flange 4 of the Joist thereby sharing the force between the two flanges instead cf this being carried by the top flange alor~,e_ Furthermore, the stiffening rib 15 stifXens the metal comprising the mounting means 6 of the hanger which assists in preventing the mounting means which abuts the face of the I-Joist from buckling_ The stiffening rib 15 as described above can ba used t~o create I-Joist connections which do not need backei blocks fixed to the I-Joist web 5 to prevent the top zlangs 3 cf the I-Joist from rotat2ng_ the hanger of the present invention has all of the advantages of currently available hangers but with a.ncreased load capacity over such hangers.
The increased efficiency in dealing with ~-otatiox~al forces on the I-Joist flanges 3,4 also means that a haziger according to the present invention. can be adapted for use in face-fi~> or top-fix operations. An embodiment of the present invention, inccrporatea into a face fix hanger is shown in Figure 4. The stiffening rib 15 of the hanger effectively resists this rotation as a backei block would do thus enabling either face fix cr top fia or k~rap around hangers to be used for T-Joist connections :~0 without the need for backer blocks.
Figure 5 i7.lustrates diff~rent embodiments of the present inventi-oz~ providing fac~-fig:, top-fi~~, or wrap around hangers which can be used wi~h Conventional I-Joists . . ... . _ _ , 10 without the need zor ba;.ker blocks . The load car~-vir~.g capacity of each ct these embodiments of the present invention is increased with. iespect to known hangers which are riot provided with the stiffer~ing rib 15 as described.
A fu:.°ther improvement in the hangers of the present invention is shown in Figur~ 6. In this embodiment a further aperture 17 is provided in the mounting plat°_ 6 to of the hanger for an additional nail 1B to be placed through the mounting means and into the lower flange a of the I-~oist_ The aperture 17 is provided adjacent to the bottom corner of the stiffening rib 15 adjacent the mounting means. When the additional nail is inserted into the T-Joist, this serves as a metal bearing for the edge of the stiffening zib I5 as it tries to push into the edge of the z-Joist bottom flange 4.
Such a nail inserted immediately below the lower °dge of 2o the stiffening rib 15 as shown in Figure 7 spreads the compression forces over a greater area and prevents the stiffening rib from biting into the Lop sur~ace of the bottom flange 4 oY the I-Joist so easily and quickly.
This enhances the load-Yarr~ring capacity of the connection even further.
It ~,~ill of course be appreciated that ordinarily a nail driven through an T_-Joist flange 3,4 at this position would split the solid timber of laminated timber forming the I-Joist flange as shown in Figure 8a, however because the stiffenin5 rib 15 is provided immediately above the top of the I-Joist bottom flanae a, and .n tight contact with it, the stiffening rib ~ 5 serves to prevent the top . . . 11 fibres of the flange from lif~ing upwards and therefor no splitting occurs as shown in figure Ob.
A furthei embodiment of the invention is shown in figure 9 wherein onE or both ends of the stiffening rib 15 is formed with a foot 19 which projects ourwardl~~ az substantially 90° from the stiffening rib. ~~hen the hanger is mounted on an I-joist, the foot lies along the top surface of the bottom flange and prevents the e~areme edge of the s t i f f ~n ing rib f rcm bedding into the f 1 anger s cf the T-jcist as soon aJ the hanger is applWd to the I-joist. Additional fixing means (not shown) such as a nail may be used to further secure the foot of the stiffening rib in position on the I-joist rlange.
'! 5 Tt uPil? b~ appreciated that the features of the present invention result in a hanger which has an inc=egsed load bearing ability without the need for additional backer blocks used to pacl~ out the I-Joist and this in tuin provides a more cost effective connection.
Claims (8)
1. A hanger adapted for mounting on an I-Joist, the hanger comprising mounting means connectable to the I-Joist support means projecting outwards from the mounting means and defining a support for an end section of a reinforcement member, I-Joist or other beam, the mounting means comprising a projection provided at substantially 90 degrees to the mounting means and adapted for insertion between upper and lower flanges of the I-Joist.
2. A hanger as claimed in claim 1 wherein the mounting means comprises a metal plate having at least one fixing aperture.
3. A hanger as claimed in claim 1 or claim 2 wherein the width of the projection is about half the width of the mounting means.
4. A hanger as claimed in any preceding claim wherein the mounting means is provided with a projection on either side of the support means.
5. A hanger as claimed in any of claims 2 to 4 wherein the fixing aperture is provided on the mounting means substantially at or below the lower edge of the projection.
6. A hanger as claimed in any preceding claim wherein the support means comprises two side walls and a base which project from the mounting means in the form of a stirrup.
7. A hanger as claimed in any preceding claim wherein at least one edge of the projection is tapered.
8. A hanger as claimed in any preceding claim wherein at least one edge of the projection is formed with a foot which extends substantially perpendicular to the projection such that in use the foot lies along a flange of the I-Joist.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0500003.9A GB0500003D0 (en) | 2005-01-04 | 2005-01-04 | Improved hanger |
| GB0500003.9 | 2005-01-04 | ||
| GB0506620.4 | 2005-04-01 | ||
| GB0506620A GB2421964B (en) | 2005-01-04 | 2005-04-01 | Improved hanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2531882A1 true CA2531882A1 (en) | 2006-07-04 |
Family
ID=36646282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002531882A Abandoned CA2531882A1 (en) | 2005-01-04 | 2005-12-30 | Improved hanger |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20060156682A1 (en) |
| CA (1) | CA2531882A1 (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070261362A1 (en) * | 2006-05-03 | 2007-11-15 | Davis John D | Wooden Web Stiffener Having Chord Nailing Restrictor For Wooden I-joist |
| US8910455B2 (en) * | 2010-03-19 | 2014-12-16 | Weihong Yang | Composite I-beam member |
| US20140245696A1 (en) * | 2013-03-04 | 2014-09-04 | Boise Cascade Company | Fire resistant construction members |
| US9003738B1 (en) * | 2013-12-02 | 2015-04-14 | Jack W. Evans, Jr. | Construction spacers and method |
| US10024049B2 (en) | 2013-12-31 | 2018-07-17 | Columbia Insurance Company | Hanger for fire separation wall |
| GB201417559D0 (en) * | 2014-10-03 | 2014-11-19 | Whale Luke R J | I-Beam joist hanger |
| US10323419B2 (en) | 2015-04-16 | 2019-06-18 | Fero Corporation | Support bracket apparatus |
| US9316004B1 (en) | 2014-12-01 | 2016-04-19 | Michael Hatzinikolas | Support bracket assembly and method |
| CN105525558B (en) * | 2015-12-29 | 2017-11-28 | 北京国家游泳中心有限责任公司 | The compound wood box construction and its construction method of indoor interim ice stadium ice face supporting |
| CN105525557B (en) * | 2015-12-29 | 2017-11-28 | 北京国家游泳中心有限责任公司 | Structural system and its construction method for indoor interim ice stadium ice face supporting conversion |
| CN105525556B (en) * | 2015-12-29 | 2018-02-09 | 北京国家游泳中心有限责任公司 | Wooden case unit is combined into the connector and its joining method of light-duty wooden platform |
| US10179992B2 (en) * | 2016-08-08 | 2019-01-15 | Columbia Insurance Company | Heavy duty hanger for fire separation wall |
| US11255091B2 (en) | 2018-12-03 | 2022-02-22 | Fero Corporation | Support bracket apparatus |
| US11118358B2 (en) | 2019-05-30 | 2021-09-14 | Fero Corporation | Support bracket assembly and method |
| US11162265B2 (en) | 2020-04-06 | 2021-11-02 | Fero Corporation | Support bracket assembly and method |
| AU2021299316A1 (en) | 2020-07-01 | 2023-02-02 | Omg Building Products Llc | Expandable hanger for beam |
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| US508280A (en) * | 1893-11-07 | Beam or girder support | ||
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-
2005
- 2005-12-30 CA CA002531882A patent/CA2531882A1/en not_active Abandoned
- 2005-12-30 US US11/323,335 patent/US20060156682A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US20060156682A1 (en) | 2006-07-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |