AU2019272026A1 - Joist Hanger - Google Patents
Joist Hanger Download PDFInfo
- Publication number
- AU2019272026A1 AU2019272026A1 AU2019272026A AU2019272026A AU2019272026A1 AU 2019272026 A1 AU2019272026 A1 AU 2019272026A1 AU 2019272026 A AU2019272026 A AU 2019272026A AU 2019272026 A AU2019272026 A AU 2019272026A AU 2019272026 A1 AU2019272026 A1 AU 2019272026A1
- Authority
- AU
- Australia
- Prior art keywords
- joist
- plate
- base plate
- trapezium
- structural steel
- 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
- 229910000746 Structural steel Inorganic materials 0.000 claims abstract description 101
- 239000000463 material Substances 0.000 claims abstract description 30
- 230000001154 acute effect Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 13
- 239000010959 steel Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 2
- 238000009432 framing Methods 0.000 abstract description 2
- 230000000284 resting effect Effects 0.000 abstract 1
- 239000002023 wood Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000010960 cold rolled steel Substances 0.000 description 3
- 238000009408 flooring Methods 0.000 description 3
- 241000826860 Trapezium Species 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- 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
Abstract
The invention is a joist hanger for connecting any framing material to a structural steel beam which is adapted to allow (1)easy placement of the joist hanger on the joist, (2) allow the correct placement of any size joist with any size structural beam, (3) provides a means of resting the joist on the beam to limit the time of working at height, and (4) is easily constructed which comprises three connected plates arranged to be attached to the end of a joist offsite and to be easily connected by a single bolt to a structural steel beam through a predrilled hole in the structural steel beam. 2b 2a FIGURE la iso view FIGURE lb iso view
Description
FIELD OF INVENTION
[001] The invention is a floor joist hanger for use in connecting floor joists to structural steel beams.
BACKGROUND TO THE INVENTION
[002] Most buildings these days are built with an internal frame and an enclosing skin which is tied to the frame. The frame can be made from a few different materials, but most commonly the frame is made from wood or steel. There are two kinds of steel that may be used - structural steel in the form of I-beams, C-beams or Z-beams or other shapes which are formed by hot rolling or welding and are much thicker and stronger than light gauge steel sections which are formed by cold rolling thin strips of steel into channels of different shapes, but most commonly C-sections.
[003] Often a building will be made with a combination of structural steel and wood or light gauge steel. The structural steel will bear the weight of heavy elements of the building - for example a second storey, or a cantilevered balcony, while the wood or light gauge steel frame bears the weight of lighter parts of the building such as the walls.
[004] When constructing the floor of a second storey, it is ideal to have the top of the floor joist flush with the top of the structural steel, so the final floor has no changes in level or lumps or bumps.
[005] Connecting the different parts of the frames made of different materials is often difficult. There are metal hangers that can be welded or bolted to the structural steel and are formed to accept the joists. When building a wood and structural steel frame, often wood is bolted on top of the I-beam or in between the two horizontal parts of the I-beam and then standard joist straps that are used to connect wooden joists to wooden frames are used and are nailed or screwed to the wooden inserts or layers on the structural steel beam.
[006] Additionally, the most common and cost-effective hangers are designer to have the bottom of the joist sit inside the hanger, and the top of the hanger to be attached to the top of the structural steel. Therefore, there are many sizes of hangers needed for joists of different heights, and structural beams of different sizes.
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[007] The joists are installed at height on site and need to be supported by workers, on ladders, while they are secured to the structural steel beams. In summary, installing second storey floor joists is a time consuming, complicated process to requiring structural steel to connect to other framing materials and may require that many different types and sizes of hangers be kept in stock.
[008] The present invention aims to make the process of installing a joist in a building that has structural steel beams quicker and easier. The added benefit of speed and ease is that builders are working at height for less time and holding unwieldy joists up while they are being installed for less time and this improves safety.
SUMMARY OF INVENTION
[009] It is an object of this invention to provide an easy to install joist hanger for use in buildings with structural steel beams.
[010] A second object of this invention is to provide a joist hanger which helps locate the joist in the correct position.
[011] A third object of this invention is to provide a joist hanger that can be used with any sized structural steel beam and any sized joist.
[012] A fourth object of this invention is to provide a joist hanger that can be fitted offsite, or in a factory, to the joist, which is easily placed with the use of a dimpled hole, which matches a complimentary dimple in the joist
[013] A fifth object of this invention is to provide a joist hanger that can be fitted offsite, or in a factory, to the joist, which is easily placed with the use of a dimpled hole, which matches a complimentary dimple in the joist, in a predetermined position which is calculated by a computer program or draftsperson or engineer to locate the joist at the correct height relative to the upper surface of the structural steel, to provide a even surface for further flooring materials to be installed on top of the structural steel and joist, providing a smooth, finished floor surface.
[014] In a first aspect of the invention is a joist hanger for connecting a joist of any material to a structural steel beam, the hanger having three joined plates comprising:
a) a horizontal right quadrilateral base plate;
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b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam.
[015] In a second aspect of the invention is a joist hanger for connecting a joist of any material to a structural steel beam, made from a single plate of steel which has been shaped and bent to produce a joist hanger having three joined plates comprising:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam.
[016] In a third aspect of the invention is a joist hanger for connecting a joist of any material to a structural steel beam, the joist hanger having three joined plates comprising:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than
2019272026 28 Nov 2019 the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist, where the at least one hole is surrounded by a dimple, which matches a dimple on the joist, which aids in alignment and placement
e) at least one bolt slot in the base plate, for attachment to a structural steel beam.
[017] In a fourth aspect of the invention is a method for installing a joist using a joist hanger adapted for connecting a joist of any material to a structural steel beam, characterized in that the joist hanger having three joined plates comprises:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam; comprising
1. attaching a joist hanger to a vertical end of the joist, using screws or rivets through at the at least one hole in the trapezium-shaped plate, and
2. attaching the joist to a structural steel beam using a nut and bolt through the at least one blot slot on the base plate of the joist hanger and through a predrilled hole in the structural steel beam.
[018] In a fifth aspect of the invention is a method for making a floor using a joist hanger adapted for connecting a joist of any material to a structural steel beam, characterized in that the joist hanger having three joined plates comprises:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate
2019272026 28 Nov 2019 from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam; comprising
1. attaching a joist hanger to a vertical end of the joist, using screws or rivets through at the at least one hole in the trapezium-shaped plate, and
2. attaching the joist to a structural steel beam using a nut and bolt through the at least one blot slot on the base plate of the joist hanger and through a predrilled hole in the structural steel beam.
[019] In a sixth aspect of the invention is a combination of a joist and a joist hanger which allows a joist of any height to be attached to a structural steel beam of any size which comprises:
a) a joist with a solid vertical end, which when installed will abut the structural steel beam;
b) a joist hanger having three joined plates comprising:
i. a horizontal right quadrilateral base plate;
ii. a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and iii. a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
iv. at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
v. at least one bolt slot in the base plate, for attachment to a structural steel beam.
in which the joist hanger is attached to the end of the joist using a screw through the at least one hole in the trapezium-shaped plate.
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[020] In a sixth aspect of the invention is a joist hanger having three joined plates comprising:
a) a horizontal right quadrilateral base plate;
b) a first vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a second vertical plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, and the second plate being longer than the edge of the base plate to which it is attached, and taller than the first vertical right quadrilateral plate;
d) at least one hole in the second vertical plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam.
[021] In a seventh aspect of the invention is a method for installing a joist using a joist hanger adapted for connecting a joist of any material to a structural steel beam, characterized in that the joist hanger having three joined plates comprises:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam;
comprising
1. attaching a joist hanger to a vertical end of the joist, using screws or rivets through at the at least one hole in the trapezium-shaped plate,
2. attaching a stabilizing bracket to the joist, using screws or rivets;
3. attaching the joist to a structural steel beam using a nut and bolt through the at least one blot slot on the base plate of the joist hanger and through a predrilled hole in the structural steel beam; and
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4. attaching the stabilizing bracket to the structural steel beam, using a nut and bolt.
[022] In an eighth aspect of the invention is a method for installing a joist using a joist hanger adapted for connecting a joist of any material to a structural steel beam, characterized in that the joist hanger having three joined plates comprises:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam;
comprising
1. attaching a joist hanger to a vertical end of the joist, using screws or rivets through at the at least one hole in the trapezium-shaped plate,
2. attaching a stabilizing bracket to the structural steel beam, using a nut and bolt;
3. attaching the joist to a structural steel beam using a nut and bolt through the at least one blot slot on the base plate of the joist hanger and through a predrilled hole in the structural steel beam; and
4. attaching the stabilizing bracket to the joist, using screws or rivets.
DESCRIPTION OF THE DRAWINGS
[023] Figure 1 b shows the preferred embodiment of the joist hanger of the invention, 1. The joist hanger comprises a right quadrilateral base plate, 4, a vertical right quadrilateral plate, 2, a vertical trapezium shaped plate, 3, dimpled holes, 6, to align the joist hanger at the correct predetermined position on the joist where the dimples interact with corresponding dimples in the joist, and a bolt slot, 5, through which the joist hanger is attached with a nut and bolt to a structural steel beam.
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[024] Figure 1a shows the joist hanger, and indicates the front, 2a, and back, 2b, of the vertical right quadrilateral plate. The back of the vertical plate, 2b, abuts the end of the joist, and additional means of attachments (screws, rivets etc.) may be placed through the vertical plate, 2, and into the joist to provide more secure attachment of the joist hanger to the joist.
[025] Figures 2a through 2d, 3a and 3b, are different views of the preferred embodiment of the joist hanger, 1, in which the alignment and relative sizes can be seen.
[026] Figure 4a shows the joist hanger, 1, attached to a joist, 8, on the end of the joist, 9. It can be seen that the vertical right quadrilateral is abutting and is attached via two screws to the end of the joist, which is the back of a C-section of cold rolled steel; and that the vertical trapezium-shaped plate abuts and is attached , with two screws through 2 dimpled holes, to the side of the end of the joist which is a flange of the C-section of cold rolled steel.
[027] Figure 4b shows the joist hanger, 1, attached to a flange of a structural steel I-beam, 10, with a bolt through the bolt slot in the base plate.
[028] Figure 4c shows a joist of cold rolled steel, 8, attached to a structural I-beam, 10, using the joist hanger, 1, of the invention.
[029] Figures 5a, 5b, and 5c are different views of the installed joist used in conjunction with a stabilizing bracket.
DETAILED DESCRIPTION OF THE INVENTION
[030] The following detailed description of the invention refers to the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings and the following description to refer to the same and like parts. Dimensions of certain parts shown in the drawings may have been modified and/or exaggerated for the purposes of clarity or illustration.
[031] Further advantages and improvements may very well be made to the present invention without deviating from its scope. Although the invention has been shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope and spirit of the invention, which is not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent devices and apparatus. Any
2019272026 28 Nov 2019 discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of the common general knowledge in this field.
[032] In the present specification and claims (if any), the word comprising and its derivatives including comprises and comprise include each of the stated integers but does not exclude the inclusion of one or more further integers.
[033] It is an object of this invention to provide an easy to install joist hanger for use in buildings with structural steel beams.
[034] Installing joists can be difficult due to the differences in materials, the need for strong connections, working at height risks, and the many different sizes of the materials involved. Typically, the structural steel beams will have been securely installed at the building site and the joists are added to the structural steel frame. This involves lifting a long, heavy, unwieldy joist usually 2m above the ground, and holding it in place until it has been secured to the structural steel joist.
[035] The base plate of the present invention, 4, may act as base which rests on the flange of the structural steel and when both ends of the joists are on the structural steel beam to which the joist is to be attached, the structural steel will take the full weight of the joist and at most, a builder may be needed to align the joist in a vertical position, but the builder, who is probably on a ladder, is no longer supporting the full weight of the joist and this makes the installation of joists, easier and safer for the builders. Also, because the joist hanger may be attached to the joist prior to the joist being lifted into position, the number of attachments, screws or bolts, that need to be installed is reduced and so the time that it takes on site to install the joist is lessened.
[036] A second object of this invention is to provide a joist hanger that can be used with any sized structural steel beam and any sized joist.
[037] Depending on the strength required the size of the structural steel beams can vary in all dimensions and in the thickness of the material used to make the beams. Similarly, whatever material is used for the joist, the height and width of the finished beam will vary as well as the thickness of the material used. This means that either a variety of joist hangers that are specific to a specific with and height of joist are held in stock, or that the installer uses straps of metal and attaches the straps as best he can. The present invention is not
2019272026 28 Nov 2019 dependent on the width or height of either the structural steel or the joist and is also not dependent on the thickness of the material used to make either the structural steel beam or the joist.
[038] A third object of this invention is to provide a joist hanger which helps locate the joist in the correct position.
[039] Once the engineer, architect, draftsperson or computer has calculated the size of the components, he, or she or it, can also calculate at what distance from the top of the joist, that the joist hanger needs to be placed on the end of the joist, to allow the top surface of the joist and the structural steel beam to be flush, to provide a flat surface for the installation of further flooring material. In the case of steel frames, this value can be programmed into the computer controlling the rolling of the steel that makes the joist and when the joist is built, either in a factory or on-site, but more usually in a factory, the joist hanger can be attached at the same time. The location along the length of the structural steel will have also been worked out by the engineer etc., and the structural steel will be delivered on site with predrilled holes at the correct locations for the joists. Then when the joists arrive on the building site, the builder only has to raise the joists to the sites of the predrilled holes in the structural steel and use one bolt at each end of the joist to install and secure the joist.
[040] This means that only one joist hanger needs to be kept in stock because it will work on any size joist and any size beam, the placement of the hanger just needs to vary. This saves on inventory costs and wastage.
[041] A fourth object of this invention is to provide a joist hanger that can be fitted offsite, or in a factory, to the joist, which is easily placed with the use of a dimpled hole, which matches a complimentary dimple in the joist.
[042] Once the correct position for the joist hanger is determined, and it is programmed into the computer controlling the rolling process of the joist, the tooling that makes a dimpled hole can be chosen. The exact sequence or shape of the dimples is not important, it is only important the dimples are complimentary or engage with the dimples around the holes, 6, on the joist hanger. These dimples are not essential to the working of the invention, the joist hanger will still connect the joist and a structural steel beam, but the dimples speed up the location and improve the accuracy of the location of the joist hanger. When the joist hanger is being installed on the joist, the factory hand just needs to get the dimples engaging correctly and the joist will be in the correct place, and there will be a smaller margin of error,
2019272026 28 Nov 2019 and therefore a smoother floor will result. It is also faster to place to pieces of material in alignment with dimples that engage, than it is to connect two flat holes in two flat pieces of metal, where the installation of a screw may cause the metal to slip or move and small mistakes in alignment may occur.
[043] When the material of the joist is wood, it may be possible to counter-sink any predrilled holes in the end of the joist to ensure that the dimples on the joist hanger engage with the predrilled holes and provide accurate placement.
[044] A fifth object of this invention is to provide a joist hanger that can be fitted offsite, or in a factory, to the joist, which is easily placed with the use of a dimpled hole, which matches a complimentary dimple in the joist, in a predetermined position which is calculated by a computer program or draftsperson or engineer to locate the joist at the correct height relative to the upper surface of the structural steel, to provide an even surface for further flooring materials to be installed on top of the structural steel and joist, providing a smooth, finished floor surface.
[045] Working on a building site is one of the most dangerous places to work in Australia, especially when working at height, and it is also the most expensive place to have staff for the builder. Any construction that can happen off-site, in the controlled, relatively safe environment of a factory is an advantage for both workers and management. Only having to install one bolt at each end of a joist cuts down on time working at height for on-site builders. Installing the joist hanger on the joist in factory, in safe working conditions, with lifting aids, limits the risks to workers and is quicker, therefore reducing costs for management. The need for only the tools that install bolts, cuts down on the range of tools required by the onsite builder. Tool theft is a big loss for the on-site builder and it is desired to avoid the use of specialized tools where possible.
[046] In a preferred embodiment of the invention, the joist hanger is made from a single piece of 1-4mm thick steel which is stamped out and bent to form the joist hanger. Alternatively, the hanger may be made from individual pieces of steel and manufactured. But the single piece of steel plate is by far the most economical and efficient process of manufacture, in that the stamping of the shape and forming of the dimples can be done in one process, and the folding done in a second process.
[047] The shape of the second vertical plate is preferred to be a trapezium to allow for a line of sight to the bolt slot from either side of the joist hanger during installation, and it limits the amount of material used, while maintaining the required strength of the hanger.
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However, it may be a right quadrilateral, or whatever shape is suitable for the job, or the most efficient in terms of manufacture and waste.
[048] In a final embodiment of the invention, the bracket of the invention may be used in conjunction with a second stabilizing bracket.
[049] The stabilizing bracket may be of any shape or size that achieves either (a) minimization of torsion or twisting of the joist or structural steel beam; or (b) aids in the placement and installation of the joist to the structural steel beam. This embodiment is shown in Figures 5a to 5c. In the embodiment exemplified, the bracket is shown as a rightangle bracket, but it may be a simple plate, a section of C-section channel, or strapping.
[050] In Figure 5a, the stabilizing plate is shown as a right angle bracket, 11, connected to the structural steel beam, 10, using a nut and bolt, 14. This may be pre-attached in the factory to either the structural steel beam or to the joist before the house frames are shipped to the building site, or may be installed on the building site. The stabilizing bracket is attached to the joist, 12, with screws, 15. Figure 5a also shows that the joist hanger bracket of the invention is attached to the structural steel beam by a nut and bolt, 13.
[051] The method of attaching the stabilizing bracket to the structural steel beam may be different depending on the nature of the bracket chosen and will be in the common general knowledge of a builder.
[052] Further advantages and improvements may very well be made to the present invention without deviating from its scope. Although the invention has been shown and described in what is conceived to be the most practical and preferred embodiment, it is recognized that departures may be made therefrom within the scope and spirit of the invention, which is not to be limited to the details disclosed herein but is to be accorded the full scope of the claims so as to embrace any and all equivalent devices and apparatus. Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of the common general knowledge in this field.
[053] In the present specification and claims (if any), the word comprising and its derivatives including comprises and comprise include each of the stated integers but does not exclude the inclusion of one or more further integers.
Claims (9)
1. A joist hanger having three joined plates comprising:
a) a horizontal right quadrilateral base plate;
b) a first vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a second vertical plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, and the second plate being longer than the edge of the base plate to which it is attached, and taller than the first vertical right quadrilateral plate;
d) at least one hole in the second vertical plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam.
2. A joist hanger for connecting a joist of any material to a structural steel beam, the hanger having three joined plates comprising:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam.
3. A joist hanger for connecting a joist of any material to a structural steel beam, made from a single plate of steel which has been shaped and bent to produce a joist hanger having three joined plates comprising:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being
2019272026 28 Nov 2019 longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam.
4. A joist hanger for connecting a joist of any material to a structural steel beam, the joist hanger having three joined plates comprising:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist, where the at least one hole is surrounded by a dimple, which matches a dimple on the joist, which aids in alignment and placement
e) at least one bolt slot in the base plate, for attachment to a structural steel beam.
5. A method for installing a joist using a joist hanger adapted for connecting a joist of any material to a structural steel beam, characterized in that the joist hanger having three joined plates comprises:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam;
2019272026 28 Nov 2019 comprising
i. attaching a joist hanger to a vertical end of the joist, using screws or rivets through at the at least one hole in the trapezium-shaped plate, and ii. attaching the joist to a structural steel beam using a nut and bolt through the at least one blot slot on the base plate of the joist hanger and through a predrilled hole in the structural steel beam.
6. A method for making a floor using a joist hanger adapted for connecting a joist of any material to a structural steel beam, characterized in that the joist hanger having three joined plates comprises:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam; comprising
i. attaching a joist hanger to a vertical end of the joist, using screws or rivets through at the at least one hole in the trapezium-shaped plate, and ii. attaching the joist to a structural steel beam using a nut and bolt through the at least one blot slot on the base plate of the joist hanger and through a predrilled hole in the structural steel beam.
7. A combination of a joist and a joist hanger which allows a joist of any height to be attached to a structural steel beam of any size which comprises:
a) a joist with a solid vertical end, which when installed will abut the structural steel beam;
b) a joist hanger having three joined plates comprising:
c) a horizontal right quadrilateral base plate;
d) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
2019272026 28 Nov 2019
e) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
f) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
g) at least one bolt slot in the base plate, for attachment to a structural steel beam.
h) in which the joist hanger is attached to the end of the joist using a screw through the at least one hole in the trapezium-shaped plate.
8. A method for installing a joist using a joist hanger adapted for connecting a joist of any material to a structural steel beam, characterized in that the joist hanger having three joined plates comprises:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam;
comprising
1. attaching a joist hanger to a vertical end of the joist, using screws or rivets through at the at least one hole in the trapezium-shaped plate,
2. attaching a stabilizing bracket to the joist, using screws or rivets;
3. attaching the joist to a structural steel beam using a nut and bolt through the at least one blot slot on the base plate of the joist hanger and through a predrilled hole in the structural steel beam; and
4. attaching the stabilizing bracket to the structural steel beam, using a nut and bolt.
2019272026 28 Nov 2019
9. A method for installing a joist using a joist hanger adapted for connecting a joist of any material to a structural steel beam, characterized in that the joist hanger having three joined plates comprises:
a) a horizontal right quadrilateral base plate;
b) a vertical right quadrilateral plate attached to the base plate along the whole length of one edge of the base plate; and
c) a vertical trapezium-shaped plate attached to the base plate, on a perpendicular edge of the base plate to the vertical right quadrilateral plate, the acute angle of the trapezium-shaped plate being at the opposite parallel edge of the base plate from the vertical right quadrilateral plate, and the trapezium-shaped plate being longer than the edge of the base plate to which it is attached, and taller than the vertical right quadrilateral plate;
d) at least one hole in the trapezium-shaped plate for attachment to the side of a joist;
e) at least one bolt slot in the base plate, for attachment to a structural steel beam;
comprising
1. attaching a joist hanger to a vertical end of the joist, using screws or rivets through at the at least one hole in the trapezium-shaped plate,
2. attaching a stabilizing bracket to the structural steel beam, using a nut and bolt;
3. attaching the joist to a structural steel beam using a nut and bolt through the at least one blot slot on the base plate of the joist hanger and through a predrilled hole in the structural steel beam; and
4. attaching the stabilizing bracket to the joist, using screws or rivets.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2018904533A AU2018904533A0 (en) | 2018-11-28 | Joist Hanger | |
| AU2018904533 | 2018-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2019272026A1 true AU2019272026A1 (en) | 2020-06-11 |
Family
ID=70969033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2019272026A Abandoned AU2019272026A1 (en) | 2018-11-28 | 2019-11-28 | Joist Hanger |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2019272026A1 (en) |
-
2019
- 2019-11-28 AU AU2019272026A patent/AU2019272026A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PC1 | Assignment before grant (sect. 113) |
Owner name: SBS INTERNATIONAL PTY LTD Free format text: FORMER APPLICANT(S): WEEKS HOLDINGS PTY LTD Owner name: STEEL BUILDING SYSTEMS AUSTRALIA PTY LTD Free format text: FORMER APPLICANT(S): SBS INTERNATIONAL PTY LTD |
|
| MK1 | Application lapsed section 142(2)(a) - no request for examination in relevant period |