GB2396630A - Joist hanger with releasably connectable strap for securing lengthwise to a joist - Google Patents
Joist hanger with releasably connectable strap for securing lengthwise to a joist Download PDFInfo
- Publication number
- GB2396630A GB2396630A GB0329952A GB0329952A GB2396630A GB 2396630 A GB2396630 A GB 2396630A GB 0329952 A GB0329952 A GB 0329952A GB 0329952 A GB0329952 A GB 0329952A GB 2396630 A GB2396630 A GB 2396630A
- Authority
- GB
- United Kingdom
- Prior art keywords
- joist
- back plate
- connecting elements
- restraining means
- load
- 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.)
- Granted
Links
- 230000000452 restraining effect Effects 0.000 claims abstract description 42
- 230000000295 complement effect Effects 0.000 claims abstract description 16
- 230000000284 resting effect Effects 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 12
- 239000002184 metal Substances 0.000 description 10
- 239000011449 brick Substances 0.000 description 7
- 230000002441 reversible effect Effects 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000009414 blockwork Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000003466 welding Methods 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Floor Finish (AREA)
Abstract
A restraining means is provided for securing a joist or beam to a vertical structure such as a wall. The restraining means comprises a joist hanger 12 for supporting the end of a joist or a beam, a back plate 13 for attachment to a wall, the joist hanger 12 comprising connecting elements for disconnectable inter-engagement with complementary connecting elements on the back plate 13; an elongate strap 14 adapted to be secured along its length to a joist or a beam, wherein the elongate strap 14 comprises connecting elements for disconnectable inter-engagement with complementary connecting elements on the joist hanger 12, the joist hanger 12 and elongate strap 14 being arranged to inhibit the lateral movement between said joist or beam and the wall. Installation of the restraining means can be achieved simply and easily and avoids any on site twisting or bending of the elongate strap 14. An integral back plate and joist hanger is also described.
Description
Restraining Means This invention relates to a restraining means for use in
the construction industry. In particular, the restraining means finds application in both supporting an end of a generally horizontal beam member used for the construction of floors and roofs and tying that horizontal member to the vertical walls of a building. Joist hangers and restraining straps are commonly used in the construction industry. A joist hanger is conventionally used in buildings for supporting the end of a generally horizontal beam member (a joist) from a vertical support such as a load-bearing wall. Restraining straps, on the other hand, are conventionally used to tie horizontal or substantially horizontal structures such as floors or roofs to the vertical walls of a building in order to withstand forces that would otherwise cause them to separate, such as those caused by the wind, for example.
Most conventional joist hangers have a generally lazy Z-section of metal to provide an upper bearing portion to rest on the vertical support, a central abutment portion to rest against the vertical face of the vertical support and a lower support portion for supporting the end of the joist. The abutment portion and lower support portion are normally connected by vertical side straps which may be seam welded or spot welded thereto. In another form as described in GB-A-2178086 a joist hanger is made from a single metal blank bent to an appropriate shape. The joist hangers of GB-A-2178086 have wide flanges on the bearing portions which have the advantage of spreading the load. This is particularly desirable where the support wall is made from less dense material.
A further form of joist hanger described in GB-B- 2316103 is used to receive and support horizontal or substantially horizontal beam members having a range of dimensions. The joist hanger is formed from two disconnectable inter-
engagable elements comprising a joist support member and a back support member. By varying the vertical position of the joist support member on the
back support member it is possible to accommodate joists and beams of different dimensions.
In addition, some joist hangers may not have the upper bearing portion if the abutment member is intended to be secured to the vertical surface of the support wall by screws or other fixing members.
Most conventional restraining straps comprise a flat strip of metal material formed at spaced intervals with holes by which it can be secured to the floor or roof beams. Conventionally one end of the strip of metal is bent over through 90o to form a return leg so that the bent over portion engages the outer surface of the wall to resist pressures separating the wall and floor or roof. Because the bent over end is essentially turned through 90 and therefore extends in only one direction from the plane of the rest of the strip, it extends against only a single brick. The forces involved can damage such a single brick, particularly as modern building methods tend to use softer bricks or blocks than in the past.
À: -., Restraining straps, which reduce the damage caused to the walls of the building by the restraining straps referred to above are described in GB-A- A..
I. 2342105. The restraining straps described therein comprise an elongate member id.
adapted to be secured along its length to a joist or a beam or the like which is disconnectable engageable with a load bearing member, a portion of which extends generally in a plane at right angles to and in at least two directions to the length of the elongate member thereby to spread the load on the wall.
During installation, restraining straps are generally attached to the side of the joist or beam. Attachment to the top of the joist or beam typically results in unevenness of the overlying deck or floorboards making their attachment to the underlying joist or beam difficlit because of the need to pass the screws or nails used for attachment through the restraining strap.
The present invention enables a strap to be used which does not require a return leg to provide bearing against the outer surface of a wall.
A first embodiment of the invention provides a restraining means comprising a joist hanger for supporting the end of a joist or a beam, a back plate for attachment to a wall, the joist hanger comprising connecting elements for disconnectable inter-engagement with complementary connecting elements on the back plate; an elongate strap adapted to be secured along its length to a joist or a beam wherein the elongate strap comprises connecting elements for disconnectable inter- engagement with complementary connecting elements on the joist hanger or back plate, the joist hanger and elongate strap being arranged to inhibit the lateral movement between said joist or beam and the wall. The restraining means of the present invention facilitates the connection of an elongate strap to a wall via the joist hanger, thereby obviating the need for twisting and passing a strap through the wall.
À. In a preferred embodiment of the invention the joist hanger and back À real plate can be formed integrally either by pressing out a piece of suitable shape from a blank metal sheet or by permanently securing the two pieces together by, means of welds, rivets or the like.
The elongate strap and joist hanger may be arranged to support the opposing surfaces of a joist or beam. Alternatively the elongate strap and joist hanger may be arranged to support the adjacent surfaces of a joist or a beam.
In the former case, the elongate strap is most preferably connected to a load-
bearing member. In the latter case the elongate member is preferably connected to the joist hanger.
In a preferred embodiment of the invention the joist hanger comprises a seat, side flanges and a back flange. Preferably the back flange is formed in two portions spaced from one another, which portions can be flexed together elastically through the spring of the material, the connecting elements of the joist hanger being on each said portions, and in which the connecting elements can only be connected and disconnected with corresponding connecting elements of the back plate when the portions of the back flange are flexed towards one
another. Since different joist hangers can be attached to the back plate in different relative positions errors in selecting the correct joist hanger for building into the wall are reduced.
The joist hanger is preferably formed from a blank of sheet metal by bending the side flanges upwardly from the seat and bending the two portions forming the back flange inwardly towards one another from the back edges of the side flanges. Preferably each of the other pieces are also formed from sheet metal simply by bending, stamping and/or pressing without welding.
The connecting elements suitably comprise one or more apertures or hook shaped projections which correspond with hook shaped projections pressed out from a blank metal sheet. The term "hook shaped projections" is understood to include any projection formed in one of the pieces, which is adapted to engage any of the one or more apertures in the other of the pieces. The projection may À À be arranged to extend in a manner that is substantially perpendicular to the ' e plane of the piece from which it is formed or it may extend at a substantially acute angle thereto. The apertures and hooks may be arranged in a substantially horizontal line relative to each other or they may be staggered. Alternatively they may be arranged in series of pairs, preferably with the pairs one above the. I. Other ace i In an embodiment where the plate is disconnectable connected to the joist hanger by hook shaped projections which can be on the back plate or the joist hanger. The back plate preferably comprises a back flange tending to a substantially perpendicular angle with a top flange adapted to rest on the horizontal face of a wall for incorporation between courses of bricks or the like.
Preferably back flange incorporates connecting elements. Preferably, the back plate additionally comprises a return flange which extends from the top flange adapted to abut the external face of the wall. The return flange is adapted to extend upwardly or downwardly from the top flange or both upwardly and downwardly.
The term "external face" when used in relation to the wall is to be understood to mean the surface of the wall to which the back flange in question is not attached, since the brick or block work forming the wall may be part of an internal wall to which one or more back plates may be attached having back flanges on either side of the wall.
If the hook shaped projections are on the back plate the hooks extend upwardly. In contrast, if the hook shaped projections are formed on the joist hanger then they extend downwardly and the apertures on the back flange of the back plate are spaced from the surface of the support wall to accommodate the hook elements. Preferably this spacing is achieved by projections pressed out from the sheet in the process of forming the apertures.
In a preferred embodiment a restraining means according to the invention additionally comprises a load bearing member which is preferably in the form of a flange adapted to rest on the horizontal face of a wall incorporated between courses of bricks or the like to spread the load experienced by the wall from the À -- supported joist or beam. The loadbearing member may be provided in the form of a flange, which rests on the horizontal face of a wall, thereby to support the.
back plate positioned thereover. In such an arrangement, either or both of the..
À.- load bearing member and the back plate are provided with connecting elements for disconnectable inter-engagement with complementary connecting elements on the elongate member.
The provision of connecting elements on the load bearing member facilitates the support of the opposing surfaces of the joist or beam.
The load bearing member may be formed integrally with or separately from the back plate. In the latter case connecting elements may be provided for disconnectable inter-engagement of the load-bearing member with the back plate.
In a particularly preferred embodiment of the invention, the load bearing member is formed integrally with both the back plate and the joist hanger. In this arrangement the structural integrity of the restraining means is optimised.
The load bearing member preferably extends across the width of the horzontal face of the wall, is preferably of angular section and is intended to extend in at least two directions from the joist hanger parallel to the external surface of the wall, thereby to spread the load across the external surface thereof. The load-bearing member and back plate together may therefore define an angular cross-section, a square-U, or a bent-T cross-section. This has the advantage of further spreading the load experienced by the wall as a result of the forces imposed upon it by joists suspended therefrom in the plane of the wall. The elongate strap comprises connecting means at one end for disconnectable securing it to either the load-bearing member or the joist hanger.
Where the elongate strap and joist hanger support adjacent sides of a joist or a beam it is preferably connected to the joist hanger via connecting elements on a side flange of the hanger. The elongate strap may be secured to the joist hanger at the external surface of the side flange or via connecting elements on the surface that would otherwise abut the supported joist or beam.
The connecting means on each of the joist hanger and the elongate strap comprise one or more apertures in one of the pieces and one or more hooked projections on the other of the pieces. The apertures and hooks may be arranged in a substantially horizontal line relative to each other or they may be staggered. Alternatively they may be arranged in series of pairs, preferably with the pairs one above the other. If the hook shaped connecting element or elements are on the side flange of the joist hanger, they are preferably on the external surface thereof and extend parallel to the intended longitudinal axis of the joist.
The elongate strap will therefore be provided with apertures to receive the hooks. Where the side flange of the joist hanger is provided with a series of apertures, the elongate strap may be disconnectable connected to either the external or internal surface thereof by means of hooks. In this instance the hooks will be directed substantially along the length of both the elongate strap and the joist or beam being supported.
Where the elongate strap and the joist hanger support opposing surfaces of a joist or beam the two are preferably connected via the intermediary of the load-bearing member. The connecting means on each of the load- bearing member and elongate strap comprise one or more apertures in one of the pieces and one or more hooked projections on the other of the pieces. The apertures and hooks may be arranged in a substantially horizontal line relative to each other or they may be staggered. Alternatively they may be arranged in series of pairs, preferably with the pairs one above the other. If the hook shaped. '.
projections are on the load-bearing member they are preferably present on the A upper surface and extend upwardly. In this case the elongate strap is provided with a series of pairs of apertures for receiving the hooks of the load bearing member..... Alternatively the load bearing member may be provided with one or more...
apertures, preferably a series of pairs of apertures which are adapted to disconnectable receive downwardly extending hooks provided on the elongate strap. Where the load bearing member is formed integrally with the back plate, the load bearing member is wider than the back flange of the back plate so as to spread the load.
Where the elongate strap and joist hanger are provided for contacting the opposite sides of a joist or a beam, the load bearing member is preferably provided with one or more projections, such as hooks, which are receivable into one or more apertures, preferably a series of corresponding pairs of apertures on the elongate strap. Alternatively the load-bearing member may comprise one
or more apertures, preferably a series pairs of apertures for receiving one or more corresponding projections on the elongate strap.
Where the load-bearing member is formed independently from the back plate, the two pieces are disconnectable connected by means of complementary connecting elements provided on each of the two pieces. As described above, the connecting elements preferably comprise one or more apertures, preferably a series of pairs of apertures on one of the pieces for engagement with one or more hook shaped projections on the other of the pieces.
The elongate strap is preferably made from relatively thin sheet material and preferably no more than 2mm thick. The load bearing member is preferably of angle section made from thicker sheet material (for example 2.5mm thickness) with the hook members cut and deformed out of the plane thereof.
À. In use the load bearing member having hook members extends substantially in: '.
the same plane as the elongate strap and a return flange extends at ' A approximately a right angle to the elongate strap to bear against block or.
À brickwork of a wall and the return flange preferably has a width at least twice the width of the back flange of the back plate and preferably it extends on both sides of the width of the back plate to spread the load over the block or..
brickwork. À Where the load-bearing member and back plate define a substantially bent U- or T- configuration, the engagement means are provided on the horizontal load bearing member as described above.
The invention will now be described by way of example with reference to the accompanying drawings. Variations on these examples falling within the scope of the invention will be apparent to a skilled person.
FIGURES
Figure 1 is an exploded view of a first embodiment of a restraining means assembly with the back plate built into a wall, the joist hanger about to be
connected to the back plate showing a joist for support by the joist hanger and an elongate strap positioned for connection to the backplatejoist hanger assembly once the joist hanger has been secured in place. Parts of the drawing are shown enlarged in detailed views as circled; Figure 2 shows an alternative back plate for use with the joist support member piece of Figure 1; Figures 3 and 4 are views similar to those of Figures 1 and 2 showing a further embodiment of a restraining means assembly; Figures 5 and 6 are views similar to those of Figures 1 and 3 showing further embodiments of a restraining means assembly; Figure 7 shows an alternative embodiment of a restraining means of,., Figures 1 to 6 in which the joist hanger is formed integrally with the back plate. À I Figure 8 shows an alternative embodiment of a restraining means of Figure 7 in which the joist hanger is formed independently of the back plate and is disconnectable inter-engageable therewith...
Figure 9 shows an alternative embodiment of a restraining means assembly in which the joist hanger is formed integrally with the back plate and the elongate strap is about to be connected with the side flange of the joist hanger. Figure 10 shows an alternative embodiment of a restraining means of Figure 9 in which the joist hanger is formed independently of the back plate and is disconnectable inter-engageable therewith.
Figures 11 and 12 are rear views, on an enlarged scale, showing a preferred feature of a joist hanger in accordance with the invention;
Figure 13 shows a further form of joist hanger for attachment to the back plate of the restraining means assembly of the present invention Figure 14 shows a modified form of hook connecting element and aperture; Figure 15 shows a further modified back plate Figure 16 shows modified apertures in the back flange of a joist hanger.
Figures 17 and 18 shows an embodiment of the invention in which the back plate is in the form of a lazy Z cross section, the supported joist being illustrated in a side on position in Figure 17 and an end on position in Figure 18.
Figures 19 and 20 show an embodiment of the invention in which the back,, plate is in the form of a square U cross section, the supported joist being lo illustrated in a side on position in Figure 17 and an end on position in Figure 20.
Figures 21 and 22 show an embodiment of the invention in which the back plate is in the form of a bent T cross section, the supported joist being.
illustrated in a side on position in Figure 21 and an end on position in Figure 22...
Figures 23 and 29 show embodiments of joist hangers and integral back plates wherein connecting elements are provided in a top flange of the back plate. Figure 24 and 30 show embodiments of a joist hanger and integral back plates wherein connecting elements are provided in a side flange of the joist hanger. Figures 25 and 27 show embodiments of joist hangers and connected independent back plates wherein connecting elements are provided in a top flange of the back plate.
Figures 26 and 28 show embodiments of joist hangers and connected independent back plates wherein connecting elements are provided in a side flange of the joist hanger.
Figures 31 to 33 show embodiments of elongate straps having connecting elements for connection to either a top flange of a back plate or a side flange of a joist hanger.
The combined joist hanger and retaining strap of figures 1 to 6 is formed in separate connectable and disconnectable pieces comprising a joist hanger 12, a back plate 13 and an elongate strap 14. The joist hanger 12 is formed from a metal sheet by bending and pressing or stamping so that it has a horizontal seat 15, side flanges 16, 17 extending upwardly from the side edges of the seat and a back flange 18, formed by flanges 19 turned inwardly from the back edges of the side flanges. In a modified arrangement the back flange is formed from the centre of the blank strip and the seat by the two ends. In each of the embodiments of Figures 1, 3, 5 and 6, the back plate 13 is formed from metal sheet bent to a substantially right-angled configuration so that it has a horizontal top flange 20 and a back flange 21. The top flange 20 is provided with a series of upwardly extending hooks 23 and is supported on the top surface of a support wall 22 incorporated between courses of bricks in a support wall 22 with the back flange 21 abutting the vertical face of that wall. In the arrangement of Figures 1 and 3 the top flange 20 and the top of the back flange 21 are substantially twice as wide, as the back flange generally so as to spread the load. The top flange is formed with ribs 24 and the back flange with a rib 25.
In the arrangements of Figures 5 and 6 the top flanges 20 are the same width as the back flanges 21 and two back plates are located side by side to receive two side-by-side joist hangers 12 for supporting side-by-side joists 26.
A separate spreader plate 251 (shown in broken line) can be placed under the top flanges 20 to spread the load as seen in Figures 5 and 6. Corners 27 may be swaged as seen in the detailed view of Figure 3.
The joist hanger 12 and back plate 13 are formed with interengageable connecting elements, these elements preferably taking the form of pairs of side-by-side apertures, one above the other, in one piece and pairs of side-by-side hook shaped projecting elements pressed out of the sheet material on the other piece. As seen in Figures 1, 2 and 5 the connecting elements on the back plate comprise a series of, in this example, five pairs, one above the other, of upwardly directed hooks 30. The joist hanger member 12 intended to be connected with the back plate has two pairs of apertures 31 one above the other and separated by the same spacing as the pairs of hook members. The apertures in the joist support member can be engaged over one or more, preferably any two, selected pairs of hook members to engage and retain the joist hanger in contact with the back plate. The joist as seen at 26 can then have its end secured in the joist hanger and connected thereto by nails extending through the holes 34 in the side flanges of the joist hanger. The joist hanger 12 can be connected with the back plate in four different vertical positions relative thereto and therefore the same joist hanger 12 can be used to support joists of different heights or joists at a different height relative to the back plate 13. The same back plate 13 could be used to support joist hangers of different depths or different widths.
The elongate strap 14 is provided with a series of pairs of apertures 50 along its length through which it may be secured to the joist 26 by means of screws, nails or the like. The elongate strap is disconnectable connected to the back plate 13 by the reversible inter-engagement of hooks 23 with apertures 51 provided on the elongate strap. Once the joist 26 has been secured in the joist hanger and connected thereto by nails, the elongate strap 14 can then be secured in position.
In the arrangement of Figures 3 and 6 the connecting elements in the back plate 13 comprise a series of pairs of side-by-side apertures 35, arranged one above the other, pressed out from the sheet metal so that projections 36 abut the vertical face of the wall 22 and space the apertures from the wall. The connecting members on the joist hanger comprise two side-by-side pairs, one above the other, of downwardly extending hook members 38, again pressed out
from the sheet material. As before these hook members 38 can be engaged in the apertures 35 of the back plate after the back plate has been built into the wall, so as to connect the hanger 12, and back plate 13.
Figures 2 and 4 show alternative back plates 40 and 41, each being substantially planar and including apertures 42 for fixing means for securing it directly onto the vertical face of the wall 22. Plate 40 is formed with a series of upwardly directed hooks 30, similar to the hooks of Figure 1 while plate 41 is formed with a series of apertures 43 for receiving hooks 38. The plates 40 and 41 optionally comprise connecting means for disconnectable inter-engagement with the load-bearing member (not shown).
In Figure 7 the joist hanger 12 is formed integrally with the back plate 13 and load-bearing member 20. The load-bearing member 20 is provided with a series of upwardly extending hooks 23. The elongate strap 14 is provided with a series of pairs of apertures 51. Securing the elongate strap 14 to the integral joist hanger and back plate can be achieved by reversible inter-engagement of the hooks 23 with the apertures 51 of the elongate strap.
In Figure 8 the joist hanger 12 is formed independently of the back plate 13. The back plate is provided with a series of hooks 30 for disconnectable inter-
engagement with apertures 31 of the joist hanger. The load-bearing member 20 is formed integrally with the back plate 13 and is provided with a series of upwardly extending hooks 23. The elongate strap 14 is provided with a series of pairs of apertures 51. Securing the elongate strap 14 to the integral joist hangerand back plate can be achieved by reversible inter-engagement of the hooks 23 with the apertures 51 of the elongate strap.
In Figure 9 the joist hanger 12 is formed integrally with the back plate 13 and load bearing member 20. The side flange 15 of the joist hanger 12 is provided with a series of outwardly extending hooks 29. The elongate strap 14 is provided with a series of pairs of apertures 51. Securing the elongate strap 14 to the integral joist hanger 12 and back plate 13 can be achieved by reversible inter-engagement of the hooks 29 with the apertures 51 of the elongate strap.
In Figure 10 the joist hanger 12 is formed independently of the back plate 13. The back plate is formed integrally with the load bearing member 20 and is provided with a series of hooks 30 for disconnectable inter-engagement with apertures 31 of the joist hanger 12. The side flange 16 of the joist hanger 12 is provided with a series of outwardly extending hooks 29. The elongate strap 14 is provided with a series of pairs of apertures 51. Securing the elongate strap 14 to the integral joist and back plate can be achieved by reversible inter-engagement of the hooks 29 with the apertures 51 of the elongate strap.
Figures 11 and 12 show a feature of all of the joist hangers illustrated in Figures 1 to 6, which is not shown in the other Figures. In the unconnected and undistorted form of the joist hanger the side flanges 16 and 17 are biased so that they rest not exactly vertical but slope upwardly and outwardly away from one another at a small angle. However the spring in the metal material from which the joist hangers are made allows the side flanges to be pushed towards one another until they are parallel or past parallel and in this position the connecting elements on the back flanges of the joist hanger will be spaced a similar distance from one another as the connecting elements on the back plate so that they can be interengaged. The spring in the material will then tend to retain the connecting elements and thus the pieces connected together. In the connected position the side flanges are parallel. If desired the apertures on the joist hanger or back plate can be formed with a side extension as seen at 44 to provide a positive interlocking of the hooks and apertures so that the joist hanger cannot be disconnected from the back plate without again flexing the sides towards one another.
Figure 13 shows a modified form of joist hanger in which the side flanges 16 of Figures 1 to 6 have been omitted. The joist hanger is preferably formed in one piece by folding the back flanges 18 up from the seat 15 at 52. The seat is preferably wider at 52 than at its free end. A cut out 53 is formed in the seat of the joist hanger between the back flanges 18.The natural spring in the material from which the joist support member is formed allows the two back flanges 18 to be pushed towards one another until they are parallel or past parallel into a
position in which the connecting elements on the back flanges 18 are spaced a similar distance from one another as the connecting elements on the back plate so that they can be inter-engaged. The spring in the material will then tend to retain the connecting elements and thus the pieces connected together. In the connected position the side flanges are parallel.
Figure 14 shows a modified form of hook connecting element 43 pressed out sideways from the sheet material and a modified form of aperture 44 to accommodate such element. Such hooks and apertures could be used in any of the embodiments. The gap 45 allows for compression of the side flanges towards one another for interfitting and then springing back to the parallel in the connected state.
In order to ensure that the connection between the back plate 13 and the joist hanger 12 is sufficiently strong it may be necessary to ensure that the connecting elements cannot be interconnected without at least two pairs of projections interengaging with two pairs of apertures. To ensure this it is necessary to ensure that the upper connecting element of the joist hanger cannot be engaged with the lower connecting element on the back plate.
It may be desirable to ensure that all the projections of the connecting elements engage with apertures. For this purpose the sizing of the apertures may be varied, for example the upper aperture or pair of apertures on the joist support hanger may be smaller than the lowest projection or pair of projections on the back plate. The back plate 13, for example, may be formed with three pairs of upwardly hooked projections 43 of slightly different heights and shapes from one another (as seen from the cut outs from which they are pressed).
Corresponding apertures 44 in the parts of the back portion 18 of the joist support member have portions of major height corresponding to the heights of the projections and portions of minimum height corresponding to the minimum dimensions of the hook shaped projections.
Figure 15 illustrates a further embodiment of the invention in which the load-bearing member and back plate define an inverted square-U cross-
section. Upwardly extending hooks 54 extending from apertures 57 are formed by outwardly stamping the material of the back plate towards their respective sides on the back flange 58 of the U shaped back plate, which sits adjacent the vertical face of the wall to which the joist or beam is to be attached. The hooks 54 are adapted for disconnectable interengagement with apertures 44 formed in the back flange of the joist hanger as illustrated in Figure 16. Adjoining the back flange 58 is provided a top flange providing a load bearing member 20, which extends in a direction, which is substantially perpendicular to that of the back flange 58. The load bearing member 20 is also provided with a series of hooks 23 formed by upwardly stamping the material of the back support member in a manner similar to that described above. The hooks 23 are diconnectably inter-engagabie with apertures 51 provided on the elongate strap. The load bearing member 20 extends across the width of the wall and is adjoined at its end remote to back flange 58 to return flange 61, which extends downwardly in a direction that is substantially parallel to that of back flange 58. The load bearing member 20 and return flange 61 are wider than limb 58 and this has the advantage of spreading the load experienced by it as a result of the forces imposed upon the wall by the joist or beam suspended therefrom.
The back plate can be secured to the wall by apertures 62 and 63 provided on the load bearing member 20 and back flange 58 using screws, nails or the like.
In Figures 17 and 18 the horizontal load-bearing member (20) and back flange 113 together define an angular cross-section. The joist hanger and back plate may be formed integrally. The load-bearing member 20 is of a width that is substantially twice that of the back flange 113. A single joist hanger may be used to support the end of a joist or beam as illustrated in
Figure 17. Alternatively a number of joist hangers may be used to support the joist or beam along its length as shown in Figure 18. The beam or joist can be secured to the joist hanger through apertures 34 provided on the joist hanger 12. In each case, the beam or joist is further secured in position by the elongate strap 14, which is disconnectable engaged to the horizontal load bearing member 20 by means of complementary hooks and apertures provided on the horizontal load bearing member 20 and the elongate strap 14. The elongate strap is further provided with holes 51 by which it can be secured along the length of the joist or beam by means of screws, nails or the like.
In Figures 19 and 20 the joist hanger 12 and back plate 13 are formed separately or integrally and together form a square U configuration. The back plate is provided at its upper end with a horizontal load bearing member 20 and a return flange 61, which both have a width that is greater than that of the back flange of back plate 13 and is preferably substantially twice as wide as the back flange. The horizontal load bearing member 20 and return flange 61 help to spread the load experienced by the wall as a result of supporting the joist or beam therefrom. An elongate strap 14 is disconnectable connected to the load bearing member 20 and is secured along its length to one or a number of joists or beams as indicated above. The beam or joist can be secured to the joist hanger in the manner indicated above. As before, a single joist hanger may be used to support the end of a joist or beam as illustrated in Figure 19 or a number of joist hangers may be used to support the joist or beam along its length as shown in Figure 20.
In Figures 21 and 22 the joist hanger 12 and back plate 13 are also formed separately or integrally and are together formed into a bent T configuration. The back plate is provided with a horizontal load bearing member 20 and a vertically extending return flange 161 which both have a width that is greater than that of the back flange of the back plate 13 and is
preferably substantially twice as wide as the back flange. As indicated above, the horizontal load bearing member 20 and return flange 161 help to spread the load on the wall. An elongate strap 14 is disonnectably connected to the horizontal load bearing member 20 as indicated above and is secured along its length to one or a number of joists or beams as indicated above. The beam or joist can be secured to the joist hanger 12 in the manner indicated above. As shown in Figures 23 to 30, preferred embodiments of the invention comprise a joist hanger 12 and a back plate 13. The joist hanger can be integral with the back plate as shown in figures 23, 24, 29 and 30.
Alternatively, the back plate 13 can be disconnectable connectable with the joist hanger 12 as shown in figures 25 to 28. A.' À Where the back plate 13 is disconectably connectable with the joist hanger, the hanger comprises back flanges 81, 82 which can extend towards each other from side flanges 16, 17 as shown in figures 25 and 26 or away from each other as shown in figures 27 and 28. I ? Where the back plate 13 is integral with the joist hanger 12, the back Àeae plate can be formed in two portions as shown in figures 23 and 24.
Alternatively, the back plate can be formed in a single portion as shown in figures 29 and 30.
As mentioned previously, connecting elements are located in either a top flange of the back plate as shown in figures 23, 25, 27 or 29, or a side flange of the joist hanger as shown in figures 24, 26, 28 and 30. The connecting elements 23 are for engaging complementary connecting elements 23 in the elongate strap 14.
As shown in figures 31 to 33, preferred embodiments of strap 14 define connecting elements in the form of apertures 51. The connecting elements are for engaging with complementary connecting elements 23 in either a top flange of a back plate or a side flange of a joist hanger. The strap 14 can fix to the top, bottom or side of a joist as appropriate in the circumstances. Figure 31 shows an embodiment of a strap for fixing to the side of a joist and having connecting elements 51 adapted for engaging complementary connecting elements 23 on a top flange of a back plate 13.
Figures 32 and 33 show elongate straps 14 having connecting elements 51 for engaging complementary connecting elements 23 of a side flange 17 of a joist hanger 12. A..
À À À À Àe À. À À.. À - À. - Àe
Claims (16)
1. A restraining means comprising a joist hanger for supporting the end of a joist or a beam, a back plate for attachment to a wall, the joist hanger comprising connecting elements for disconnectable inter engagement with complementary connecting elements on the back plate; and an elongate strap adapted to be secured along its length to a joist or a beam, wherein the elongate strap comprises connecting elements for disconnectable inter-engagement with complementary connecting elements on the joist hanger, the joist hanger and elongate strap being arranged to inhibit the lateral movement between said joist or beam and the wall.
À. À À À À
2. A restraining means according to claim 1, modified in that the back.
À plate is formed integrally with the joist hanger.
3. A restraining means according to claim 1 or claim 2, additionally...:.
comprising a load-bearing member which is disconnectable inter À.. engageable with the back plate wherein the load bearing member is I À... for extending across and resting on the horizontal surface of the wall thereby to spread the load experienced by the wall from the supported joist or beam.
4. A restraining means according to any one of claims 1 to 3, modified in that the back plate is formed integrally with the load-bearing member.
5. A restraining means according to any one of the preceding claims, in which the connecting elements comprise one or more apertures in one of the pieces and one or more hook shaped projections on the other of the pieces.
6. A restraining means according to any one of the preceding claims, in which the load-bearing member comprises a top flange, which includes connecting elements for disconnectable inter-engagement with complementary connecting elements on the elongate strap.
7 A restraining means according to any one of the preceding claims, in which the load-bearing member comprises one or more hook shaped projections for disconnectable inter-engagement with one or more complementary apertures on the elongate strap.
8. A restraining means according to any one of the preceding claims, in which the load-bearing member comprises a return flange, which abuts the vertical face of the external surface of the wall thereby to À À spread the load.
À À
9. A restraining means according to any one of the preceding claims, in À which the load-bearing member and back plate together define a square-U cross-section......
À-:.
10. A restraining means according to any one of the preceding claims, in which the load-bearing member and back plate together define a or bent-T cross-section.
11. A restraining means according to any one of the preceding claims, in which the joist hanger comprises a side flange, the side flange including one or more connecting elements for disconnectable inter-
engagement with complementary connecting elements on the elongate strap.
12. A restraining means according to claim 11, in which the connecting elements comprise one or more hooked shaped projections provided on the outer surface of the side flange.
13. A restraining means according to claim 11, in which the connecting elements comprise one or more apertures on the side flange.
14. A restraining means according to any one of the preceding claims, in which the back plate comprises means for receiving the elongate strap and the load bearing member abuts the external surface of the wall
15. A restraining means according to Claim 14, in which the receiving À À means comprise one or more apertures or slots extending along the À.
À À length, the apertures or slots being adapted to receive a narrowed end À of the elongate strap...
À:.
16. A restraining means according to claim 14 or 15, in which the load bearing member comprises a return flange for abutting the external À.
surface of the wall and means for receiving and retaining the elongate À strap in place.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB0230218.0A GB0230218D0 (en) | 2002-12-27 | 2002-12-27 | Restraining means |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0329952D0 GB0329952D0 (en) | 2004-01-28 |
| GB2396630A true GB2396630A (en) | 2004-06-30 |
| GB2396630B GB2396630B (en) | 2006-02-15 |
Family
ID=9950464
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0230218.0A Ceased GB0230218D0 (en) | 2002-12-27 | 2002-12-27 | Restraining means |
| GB0329952A Expired - Lifetime GB2396630B (en) | 2002-12-27 | 2003-12-24 | Restraining means |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB0230218.0A Ceased GB0230218D0 (en) | 2002-12-27 | 2002-12-27 | Restraining means |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB0230218D0 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008007325A2 (en) * | 2006-07-07 | 2008-01-17 | Advanced Housing Systems Limited | Building method |
| GB2443483A (en) * | 2006-11-02 | 2008-05-07 | Victor Joseph Wigley | Joist Hanger with facility for damp-proofing |
| GB2443823A (en) * | 2007-04-12 | 2008-05-21 | Denmay Steel | Connector sleeve for connecting beams |
| FR2928949A1 (en) * | 2008-03-21 | 2009-09-25 | Lafarge Platres Sa | Pin for hooking e.g. linen in building construction field, has pin fixing element formed of folding line, tab and blocking element, where tab is horizontally placed, and flexible isolator is placed in vertical position |
| GB2480425A (en) * | 2010-04-26 | 2011-11-23 | Simpson Strong Tie Co Inc | Restraining strap assembly for tying two walls of a building together |
| WO2022031867A1 (en) * | 2020-08-06 | 2022-02-10 | Omg, Inc. | Hanger with removable leveling member |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1785791A (en) * | 1928-12-17 | 1930-12-23 | Franklin N Ropp | Combination joist hanger and tie |
| US1785790A (en) * | 1928-08-14 | 1930-12-23 | Franklin N Ropp | Combination joist hanger and tie |
| GB2316103A (en) * | 1996-08-10 | 1998-02-18 | Furfix Products Ltd | A two piece joist hanger |
-
2002
- 2002-12-27 GB GBGB0230218.0A patent/GB0230218D0/en not_active Ceased
-
2003
- 2003-12-24 GB GB0329952A patent/GB2396630B/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1785790A (en) * | 1928-08-14 | 1930-12-23 | Franklin N Ropp | Combination joist hanger and tie |
| US1785791A (en) * | 1928-12-17 | 1930-12-23 | Franklin N Ropp | Combination joist hanger and tie |
| GB2316103A (en) * | 1996-08-10 | 1998-02-18 | Furfix Products Ltd | A two piece joist hanger |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008007325A2 (en) * | 2006-07-07 | 2008-01-17 | Advanced Housing Systems Limited | Building method |
| WO2008007325A3 (en) * | 2006-07-07 | 2009-09-11 | Advanced Housing Systems Limited | Building method |
| GB2443483A (en) * | 2006-11-02 | 2008-05-07 | Victor Joseph Wigley | Joist Hanger with facility for damp-proofing |
| GB2443483B (en) * | 2006-11-02 | 2011-09-21 | Victor Joseph Wigley | Improvements relating to timber support and restraint in buildings |
| GB2443823A (en) * | 2007-04-12 | 2008-05-21 | Denmay Steel | Connector sleeve for connecting beams |
| GB2447532A (en) * | 2007-04-12 | 2008-09-17 | Denmay Steel | Modular connection assembly for connecting first and second beams |
| GB2443823B (en) * | 2007-04-12 | 2008-11-12 | Denmay Steel | Devices and methods for use in construction |
| GB2447532B (en) * | 2007-04-12 | 2008-11-12 | Denmay Steel | Devices and methods for use in construction |
| US8028494B2 (en) | 2007-04-12 | 2011-10-04 | Denmay Steel | Sleeve connectors for metal girders |
| FR2928949A1 (en) * | 2008-03-21 | 2009-09-25 | Lafarge Platres Sa | Pin for hooking e.g. linen in building construction field, has pin fixing element formed of folding line, tab and blocking element, where tab is horizontally placed, and flexible isolator is placed in vertical position |
| GB2480425A (en) * | 2010-04-26 | 2011-11-23 | Simpson Strong Tie Co Inc | Restraining strap assembly for tying two walls of a building together |
| WO2022031867A1 (en) * | 2020-08-06 | 2022-02-10 | Omg, Inc. | Hanger with removable leveling member |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0329952D0 (en) | 2004-01-28 |
| GB0230218D0 (en) | 2003-02-05 |
| GB2396630B (en) | 2006-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PE20 | Patent expired after termination of 20 years |
Expiry date: 20231223 |