GB2047320A - Joist hangers - Google Patents

Joist hangers Download PDF

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Publication number
GB2047320A
GB2047320A GB8006984A GB8006984A GB2047320A GB 2047320 A GB2047320 A GB 2047320A GB 8006984 A GB8006984 A GB 8006984A GB 8006984 A GB8006984 A GB 8006984A GB 2047320 A GB2047320 A GB 2047320A
Authority
GB
United Kingdom
Prior art keywords
plate
slots
joist
shoe
hanger
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
Application number
GB8006984A
Other versions
GB2047320B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydro Air International Ltd
Original Assignee
Hydro Air International Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hydro Air International Ltd filed Critical Hydro Air International Ltd
Priority to GB8006984A priority Critical patent/GB2047320B/en
Publication of GB2047320A publication Critical patent/GB2047320A/en
Application granted granted Critical
Publication of GB2047320B publication Critical patent/GB2047320B/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/12—Load-carrying floor structures formed substantially of prefabricated units with wooden beams
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E04B1/2604—Connections specially adapted therefor
    • E04B1/2612—Joist hangers

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Floor Finish (AREA)

Abstract

A shoe 10 is attached to a back plate 20 by means of bent-over tabs 16 passing through slots 24 or 32 in back-plate 20. Each component is made from a single sheet metal blank in few operations and with economical use of raw materials. Alternatively, the back-plate is formed from two separate vertical strips 30, 31 joined by straps 34 spanning the strips. The back-plates are secured to the building structure by flange 21 or by nails or bolts through holes 35. Each tab 16 may have a notch in its lower edge, to hook on to the bottom edge of the slot. In back-plate 20, step 26 provides clearance for the tabs. <IMAGE>

Description

SPECIFICATION Improvements in joist hangers This invention relates to sheet-material joist hangers. These are devices used in the building and construction industries, to support the ends of joists and beams in general.
A typical known joist-hanger comprises a shoe formed to accept the end of a joist and a supporting back-plate from which projects a flange by means of which the hanger is hung on to a course of masonry, a wall-plate or other structural part. Various welded constructions are known. E.G. it is known to weld the shoe to the back-plate. It is also known that the use of welding in the fabrication of building components can be a source of trouble unless the quality of welding is carefully controlled. It is also known to bend the complete hanger out of a single sheet of metal and to use tab and slot joints to fix parts of the hanger together. Such hangers are very wasteful of the sheet metal from which they are blanked and the bending operations are fairly complex.
It is an object of this invention to provide a joist hanger which may be manufactured with facility in a small number of operations, with economical use of raw materials and without the need to make any welded joints between components.
According to the present invention there is provided a joist hanger comprising a joistsupporting shoe and a supporting back-plate by means of which the hanger is hung on to a structural part, the back-plate having in it a plurality of slots which extend vertically, the shoe comprising a floor and two side walls, and being attached to the back-plate by means of at least one tab on each of two edges of the side walls respectively, the tabs engaging with the slots provided in the back-plate.
Two embodiments of the invention will now be described by way of example with reference to the accompanying drawings in which: FIGURE 1 shows a joist-supporting shoe of a joist hanger; FIGURE 2 shows a back-plate adapted to accept the joist-supporting shoe of Figure 1; and FIGURE 3 shows a different form of back-plate in a fragmentary manner.
The joist-supporting shoe 10 shown in Figure 1 comprises a floor 11 and two side-walls 12, 14 each perpendicular to and attached to opposite edges of the floor 11. Each side-wall 12, 14 is formed at its rear edge into a set of three tabs 1 6.
The floor 11 and the side-walls 12, 14 may be dimensioned to accommodate any size of joist and the entire shoe can be easily formed by stamping and bending from a single sheet metal blank without the need to make any welded joints.
The back-plate 20 shown in Figure 2 comprises an anchoring flange 21 which in use, hangs on a building structure, for example penetrating between adjacent courses of bricks, and a shoeattachment portion 22 which is vertical and downwardly-depending when the anchoring flange 21 is fixed in the manner indicated. The back-plate 20 is formed from a single sheet metal strip having in it a series of longitudinal slots 24 close to each edge. The six bottom slots 24 receive the tabs 1 6 on the joist-supporting shoe. A series of back-plates may be formed from a perforated strip of metal having the slots 24 already formed in it.
The joist hanger is assembled from the shoe 10 and the back-plate 20 by inserting the tabs 16 into the slots 24 from the front of the plate and then bending the tabs 1 6 over, e.g. inwardly, so that they lie flush against the rear face of the bracket 20. If desired, each tab 1 6 can have a notch at the root of its lower edge, the notches being wider than the thickness of the sheet-metal of the back-plate 20. The tabs then hook on to the bottom edges of the slots and the notches thus give a very positive interlock between the shoe and back-plate. However, the notches are not essential and may not be desired in some situations where they could possibly promote tearing of the metal.The shoe-attachment portion 22 of the back-plate 20 is formed with a step 26 so that a clearance is provided for the bent-over tabs 16 between the back-plate 20 and an adjacent part of the building structure in which the joist-hanger is fixed.
Fewer or more tabs than are illustrated may be provided. Only the bottom slots need be provided.
The slots above the shoe are redundant but it is simpler to slot the strip from which the backplates are formed uniformly along its length.
Figure 3 shows a modified back-plate which saves in the amount of metal used. The back-plate comprises two spaced, vertical strips 30 and 31 with central rows of slots 32 corresponding to the slots 24 in Figure 2. Inside the slots 32 are rows of slots 33 which are used to receive the bent-over ends of straps 34 used to join the strips 30 and 31. One situation in which the modified back plate may be used is for a timber-to-timber joint in which an anchoring flange is not used but the hanger is face-fixed to a wall plate, for example. In this case, rows of holes 35 are provided outside the rows of slots, for nails or bolts.
Alternatively, the tops of the strips 30 and 31 may be bent over to provide a flange for hooking on to a structural part. Two or more straps 34 may be required. The shoe of Figure 1 can be used with the back-plate of Figure 3 to form the complete hanger. The back-plate of Figure 2 can also be provided with fixing holes 35 instead of the flange 21.
1. A joist hanger comprising a joist-supporting shoe and a supporting back-plate by means of which the hanger is hung on to a structural part, the back-plate having in it a plurality of slots which extend vertically, the shoe comprising a floor and two side walls, and being attached to the back-plate by means of at least one tab on each of two edges of the side walls respectively, the tabs engaging with the slots provided in the back-plate.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in joist hangers This invention relates to sheet-material joist hangers. These are devices used in the building and construction industries, to support the ends of joists and beams in general. A typical known joist-hanger comprises a shoe formed to accept the end of a joist and a supporting back-plate from which projects a flange by means of which the hanger is hung on to a course of masonry, a wall-plate or other structural part. Various welded constructions are known. E.G. it is known to weld the shoe to the back-plate. It is also known that the use of welding in the fabrication of building components can be a source of trouble unless the quality of welding is carefully controlled. It is also known to bend the complete hanger out of a single sheet of metal and to use tab and slot joints to fix parts of the hanger together. Such hangers are very wasteful of the sheet metal from which they are blanked and the bending operations are fairly complex. It is an object of this invention to provide a joist hanger which may be manufactured with facility in a small number of operations, with economical use of raw materials and without the need to make any welded joints between components. According to the present invention there is provided a joist hanger comprising a joistsupporting shoe and a supporting back-plate by means of which the hanger is hung on to a structural part, the back-plate having in it a plurality of slots which extend vertically, the shoe comprising a floor and two side walls, and being attached to the back-plate by means of at least one tab on each of two edges of the side walls respectively, the tabs engaging with the slots provided in the back-plate. Two embodiments of the invention will now be described by way of example with reference to the accompanying drawings in which: FIGURE 1 shows a joist-supporting shoe of a joist hanger; FIGURE 2 shows a back-plate adapted to accept the joist-supporting shoe of Figure 1; and FIGURE 3 shows a different form of back-plate in a fragmentary manner. The joist-supporting shoe 10 shown in Figure 1 comprises a floor 11 and two side-walls 12, 14 each perpendicular to and attached to opposite edges of the floor 11. Each side-wall 12, 14 is formed at its rear edge into a set of three tabs 1 6. The floor 11 and the side-walls 12, 14 may be dimensioned to accommodate any size of joist and the entire shoe can be easily formed by stamping and bending from a single sheet metal blank without the need to make any welded joints. The back-plate 20 shown in Figure 2 comprises an anchoring flange 21 which in use, hangs on a building structure, for example penetrating between adjacent courses of bricks, and a shoeattachment portion 22 which is vertical and downwardly-depending when the anchoring flange 21 is fixed in the manner indicated. The back-plate 20 is formed from a single sheet metal strip having in it a series of longitudinal slots 24 close to each edge. The six bottom slots 24 receive the tabs 1 6 on the joist-supporting shoe. A series of back-plates may be formed from a perforated strip of metal having the slots 24 already formed in it. The joist hanger is assembled from the shoe 10 and the back-plate 20 by inserting the tabs 16 into the slots 24 from the front of the plate and then bending the tabs 1 6 over, e.g. inwardly, so that they lie flush against the rear face of the bracket 20. If desired, each tab 1 6 can have a notch at the root of its lower edge, the notches being wider than the thickness of the sheet-metal of the back-plate 20. The tabs then hook on to the bottom edges of the slots and the notches thus give a very positive interlock between the shoe and back-plate. However, the notches are not essential and may not be desired in some situations where they could possibly promote tearing of the metal.The shoe-attachment portion 22 of the back-plate 20 is formed with a step 26 so that a clearance is provided for the bent-over tabs 16 between the back-plate 20 and an adjacent part of the building structure in which the joist-hanger is fixed. Fewer or more tabs than are illustrated may be provided. Only the bottom slots need be provided. The slots above the shoe are redundant but it is simpler to slot the strip from which the backplates are formed uniformly along its length. Figure 3 shows a modified back-plate which saves in the amount of metal used. The back-plate comprises two spaced, vertical strips 30 and 31 with central rows of slots 32 corresponding to the slots 24 in Figure 2. Inside the slots 32 are rows of slots 33 which are used to receive the bent-over ends of straps 34 used to join the strips 30 and 31. One situation in which the modified back plate may be used is for a timber-to-timber joint in which an anchoring flange is not used but the hanger is face-fixed to a wall plate, for example. In this case, rows of holes 35 are provided outside the rows of slots, for nails or bolts. Alternatively, the tops of the strips 30 and 31 may be bent over to provide a flange for hooking on to a structural part. Two or more straps 34 may be required. The shoe of Figure 1 can be used with the back-plate of Figure 3 to form the complete hanger. The back-plate of Figure 2 can also be provided with fixing holes 35 instead of the flange 21. CLAIMS
1. A joist hanger comprising a joist-supporting shoe and a supporting back-plate by means of which the hanger is hung on to a structural part, the back-plate having in it a plurality of slots which extend vertically, the shoe comprising a floor and two side walls, and being attached to the back-plate by means of at least one tab on each of two edges of the side walls respectively, the tabs engaging with the slots provided in the back-plate.
2. A joist hanger according to claim 1, wherein the shoe and back-plate are both formed from single sheets of metal.
3. A joist hanger according to claim 1, wherein the back-plate comprises two spaced strips with slots corresponding respectively to the two side walls of the shoe, and straps spanning the strips.
4. A joist hanger according to claim 1, 2 or 3, wherein the tabs are notched at the roots of their under edges so as to hook over the bottom edges of the slots.
GB8006984A 1979-03-22 1980-02-29 Joist hangers Expired GB2047320B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8006984A GB2047320B (en) 1979-03-22 1980-02-29 Joist hangers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7910147 1979-03-22
GB8006984A GB2047320B (en) 1979-03-22 1980-02-29 Joist hangers

Publications (2)

Publication Number Publication Date
GB2047320A true GB2047320A (en) 1980-11-26
GB2047320B GB2047320B (en) 1983-02-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB8006984A Expired GB2047320B (en) 1979-03-22 1980-02-29 Joist hangers

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141460A (en) * 1983-06-18 1984-12-19 Press Bat Holdings Ltd Method of butt jointing timbers in a building and splice plate for performing the method
US5111632A (en) * 1990-09-06 1992-05-12 Turner Arthur R Expandable joist hanger
US5555694A (en) * 1995-01-27 1996-09-17 Simpson Strong-Tie Company, Inc. Structural hanger
GB2316103A (en) * 1996-08-10 1998-02-18 Furfix Products Ltd A two piece joist hanger
GB2401378A (en) * 2003-05-07 2004-11-10 Dennis Michael Baily Two part adjustable joist hanger
US6845594B2 (en) * 2000-04-12 2005-01-25 Jerome A. Harber Pre-manufactured joist and beam support for concrete walls
EP2607561A2 (en) * 2011-12-19 2013-06-26 Illinois Tool Works, Inc. Improved hanger
US20210230858A1 (en) * 2020-01-24 2021-07-29 Simpson Strong-Tie Company Inc. Concealed Hanger
US20210381263A1 (en) * 2017-10-12 2021-12-09 George CHARITOU Construction component

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2141460A (en) * 1983-06-18 1984-12-19 Press Bat Holdings Ltd Method of butt jointing timbers in a building and splice plate for performing the method
US5111632A (en) * 1990-09-06 1992-05-12 Turner Arthur R Expandable joist hanger
US5555694A (en) * 1995-01-27 1996-09-17 Simpson Strong-Tie Company, Inc. Structural hanger
GB2316103A (en) * 1996-08-10 1998-02-18 Furfix Products Ltd A two piece joist hanger
GB2316103B (en) * 1996-08-10 2000-12-13 Furfix Products Ltd Joist hangers
US6845594B2 (en) * 2000-04-12 2005-01-25 Jerome A. Harber Pre-manufactured joist and beam support for concrete walls
GB2401378A (en) * 2003-05-07 2004-11-10 Dennis Michael Baily Two part adjustable joist hanger
EP2607561A2 (en) * 2011-12-19 2013-06-26 Illinois Tool Works, Inc. Improved hanger
GB2497747A (en) * 2011-12-19 2013-06-26 Illinois Tool Works Joist hanger with snap off top flange
EP2607561A3 (en) * 2011-12-19 2013-07-03 Illinois Tool Works, Inc. Improved hanger
GB2497747B (en) * 2011-12-19 2017-07-12 Illinois Tool Works Improved hanger
US20210381263A1 (en) * 2017-10-12 2021-12-09 George CHARITOU Construction component
US20210230858A1 (en) * 2020-01-24 2021-07-29 Simpson Strong-Tie Company Inc. Concealed Hanger

Also Published As

Publication number Publication date
GB2047320B (en) 1983-02-02

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PCNP Patent ceased through non-payment of renewal fee