EP0026397B1 - Support pour poutre utilisé dans le bâtiment et structure de bâtiment comprenant un tel support - Google Patents

Support pour poutre utilisé dans le bâtiment et structure de bâtiment comprenant un tel support Download PDF

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Publication number
EP0026397B1
EP0026397B1 EP19800105565 EP80105565A EP0026397B1 EP 0026397 B1 EP0026397 B1 EP 0026397B1 EP 19800105565 EP19800105565 EP 19800105565 EP 80105565 A EP80105565 A EP 80105565A EP 0026397 B1 EP0026397 B1 EP 0026397B1
Authority
EP
European Patent Office
Prior art keywords
joist
support
bearing portion
supporting structure
flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19800105565
Other languages
German (de)
English (en)
Other versions
EP0026397A3 (en
EP0026397A2 (fr
Inventor
Harold John Andrews
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.)
PRESS-BAT HOLDINGS Ltd
Original Assignee
PRESS-BAT HOLDINGS 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 PRESS-BAT HOLDINGS Ltd filed Critical PRESS-BAT HOLDINGS Ltd
Publication of EP0026397A2 publication Critical patent/EP0026397A2/fr
Publication of EP0026397A3 publication Critical patent/EP0026397A3/en
Application granted granted Critical
Publication of EP0026397B1 publication Critical patent/EP0026397B1/fr
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

Definitions

  • This invention relates to a joist support for use in building, and to a building structure including such a support.
  • joist includes all forms of structural timber element such as roof trusses for example as well as the timbers conventionally referred to as joists and intended to support floors and ceilings.
  • a joist support for use in securing a joist to a supporting structure such as a masonry wall, the joist support comprising a single sheet metal member having a fold extending completely across it to divide the member into a pair of generally planar, mutually perpendicular flanges the member further comprising:
  • a fixing portion provided by one of said flanges, with fixing holes for fasteners to secure the joist support to a face of the joist,
  • the fold in the sheet metal member forming a rigid spine extending in use along a horizontal edge of a vertical face of the joist and throughout at least the major part of the bearing por- tion to rigidify the bearing portion and to transmit the load of the joist across the supporting structure from its forward edge;
  • the sheet metal member is of slightly elongate, generally rectangular form and the fold forming the rigid spine extends obliquely across the member from one corner to intersect the longer side of the elongate rectangle adjacent the opposite corner.
  • brackets including or consisting of a sheet metal member folded to form two right angled flanges, which are nailed to respective faces of the timbers.
  • U.S. Patent number 2,751,644 of Pedersen shows a vertical face of a joist secured in a butt joint to a vertical face of a timber wall plate, using a right-angled bracket.
  • British Patent number 868,578 of Wallis shows timber connectors having two assym- metrically disposed flanges at right angles.
  • U.S. Patent number 4,003,179 of Gilb shows a hanger for timber-chorded roof trusses in which the timber chord is attached to a wooden structural member by means of metal brackets having three mutually perpendicular flanges.
  • brackets attached to the supporting structure are a plain unsupported flange. Allowing for the known tendency of such a flange to flex under loading, it is clear that these brackets would be unsuitable for use in the context of transmitting a joist load to a supporting structure of soft, lightweight blockwork.
  • the flange would flex and exert the heaviest loading on the supporting structure at its extreme forward edge. This is perhaps acceptable if the supporting structure is of timber or hard and durable masonry but not if it is of soft, lightweight blockwork.
  • the joist support of the present invention loading from the joist is transmitted across the supporting structure from its forward edge because of the presence of the rigid spine extending throughout the joist support including its bearing portion. No concentration of loading occurs at the forward edge.
  • the vertical flange por- tion in the masonry also provides lateral restraint.
  • the joist support may be further characterised in that, in addition to the bearing portion, said other flange also provides a support por- tion extending beneath the joist in use, and the width of said other flange is at a maximum in the region where the bearing portion and support portion meet.
  • the means defining a location for the end of the joist may be disposed in said one flange. They may comprise one or more tongues of metal pressed out of the plane of the flange or one or more apertures through which the end of the joist can be seen.
  • the bearing portion may have one or more keying formations and/or one or more fastener receiving apertures.
  • the invention also provides a building structure comprising a supporting structure such as a masonry wall; a joist; and a joist support as set out above, securing the joist to the supporting structure.
  • the joist support will be seen to comprise a generally rectangular metal member 10 which has a single oblique fold 11, extending from one corner 12 across the member 10 to intersect an elongate edge 13 of the metal member adjacent the corner 14 opposite the first mentioned corner 12.
  • the metal member is therefore divided by the fold 11 into one flange 15 which is generally upright in use and another flange 16 which is generally horizontal in use.
  • the fold 11 can be regarded as a rigid spine extending somewhat diagonally across the metal member 10 and providing a considerable degree of rigidity.
  • the two flanges 15 and 16 are disposed at right angles to each other and, in use, the joist 17 which is outlined in chain dotted lines is placed in abutment with the flanges 1 and 16.
  • the position of the end of the joist is controlled by placing the end of the joist so that it can be seen through a joist locating aperture 18.
  • a tongue or more than one tongue of metal can be pressed out of the member 10 to provide joist locating means equivalent to the aperture 18.
  • the aperture 18 is shown provided on the one flange 15 but could alternatively be provided on the other flange 16.
  • the end portion of the joist is positioned so that its end face is located at the aperture 18 and it is then secured to the one flange 15 by suitable fastening means.
  • a number of nail holes 19 are provided, through which nails can be driven into the joist.
  • a pair of large diameter bolt holes 20 are also provided. All of these fixing holes are provided in a fixing por- tion of the one upright flange 15, this fixing por- tion lying to the right hand side of the chain- dotted line 21 which indicates the end of the joist.
  • the main securing nails will be at least twenty times the nail diameter from the end for example.
  • An additional nail hole 22 is provided somewhat closer to the line 21 for added stiffness by reducing the buckling length of the free edge 32 of the extension 30. Additionally, or alternatively, the free edge 32 of the extension 30 could be stiffened by one or more ribs for example.
  • the other flange 16 of the member 10 is disposed horizontally in use and includes a support portion 23 which is disposed beneath the end of the joist 17 in use. This may contribute to supporting and locating the joist although the joist is not secured to this support portion 23.
  • a large opening 24 is provided in the support portion 23; to be used for securing, for example, plasterboard to the underside of ' the joist.
  • the other flange 16 also includes a bearing portion 25. This bears on the upper surface of a supporting sturcture 26 shown in dotted outline.
  • the bearing portion has a larger aperture 27 which may be used as a mortar key to embed the bearing portion 25 in mortar used between adjacent courses of masonry. This keying is also assisted by virtue of the fact that a corner 28 of the member 10 is also positioned to the left hand side as shown of the line 21 which represents the position of the end of the joist and also of the edge of the supporting structure 26; thus, the corner 28 is embedded in the mortar if mortar is provided.
  • a pair of nail holes 29 are - provided, to enable the joist support to be used on a supporting structure of timber, to which it will then be nailed using these holes 29.
  • a bolt can be inserted through the aperture 27 or other purpose designed fixing means can be provided.
  • a joist support as shown in detail in Figure 1 is secured to each end of the joist 17 and effectively forms an extension 30 of the joist projecting from the end of the joist.
  • This extension is the part of the joist support to the left hand side of the line 21 in Figure 1.
  • these extensions 30 can be rested on the previously provided supporting structures 26.
  • the walls will be built up to the level at which the joists are to be provided and a pair of joist supports according to the invention will then be secured, for example by nailing, to the end portions of the joist 17.
  • the extensions 30 at each end of the joist can then be rested on the masonry of the walls as shown in Figure 2. It will be seen that the structure is fully stable without any additional courses of masonry being built above the joist support at that stage.
  • This feature of the joist support makes it adaptable for use in securing roof trusses in place to the top of a wall. In this case, there would normally be no masonry above the level of the base of the roof truss which would make the use of a.conventional joist hanger impracticable.
  • the load of the joist is spread across the width of the bearing portion in the region of the line 21 denoting the end of the joist, which coincides roughly with the edge of the lightweight blocks forming the supporting structure 26.
  • the rigidity of the spine formed by the fold 11 also serves to distribute the joist load across the thickness of the lightweight block. In this way, the load is not concentrated on the forward edge of the block, which might cause that forward edge to crumble, but is spread over a large, generally triangular region of the top surface of the block.
  • joist support shown in the drawings and described above has considerable advantages compared with a conventional welded joist hanger. Firstly, it can be manufactured quite simply by stamping and pressing from sheet metal which can be galvanised to any desired thickness as it does not need to be welded.
  • the sheet metal member 10 is generally rectangular, being slightly skewed as shown to permit the corner 28 to lie inboard of the line 21 and of the edge of the supporting structure 26. This means that large numbers of the metal members can be cut without substantial wastage from a single sheet.
  • the forces acting on the bearing portion 25 of the joist support, in use, are largely downward compressive forces whereas, with a conventional joist hanger, the forces tending to pull the bearing portion out of downward compressive forces and lateral shear forces tending to pull the bearing por-tion out of the mortar joint. This is because the joist is. disposed below the forward edge of the bearing portion of a conventional joist hanger.
  • the joist support of the present invention is positively secured at the side of the joist by means of the fixings passing through holes 19 or 20.
  • joist supports in the form shown are capable of being stacked one on another in a very minimal space and can readily be packed for transport and storage.
  • roof trusses for example could be provided with supports of the general type shown which are fitted in the factory before the roof trusses are delivered to a building site.
  • flanges are generally planar, they could be ribbed or otherwise profiled for stiffness or to improve keying or friction.
  • the joist support shown should be provided in left-hand and right-hand forms. If these are used alternately, with the joist disposed at conventional centres of 400 millimetres, the upright 31 will be spaced correctly to occur in the interstices between building elements of a course of masonry in alternate bays.
  • a masonry saw can be used to slot the masonry elements to accommodate the upright 31. If it is desired to use the joist support in renovation of existing buildings, a masonry saw can again be used to produce a pair of perpendicularly disposed slots into which the joist support can be slid. It will be appreciated that no mortar is required to secure the joist support in position so that renovation work is much more satisfactory than it would be using a conventional joist hanger which requires a mortar bond to provide edge bearing and hold it securely in position.

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

Claims (8)

1. Support de poutre apte à être utilisé pour fixer une poutre à une structure porteuse telle qu'un mur de maçonnerie, ce support comprenant une pièce unique en tôle (10) qui présente un pli (11) la traversant sur toute son étendue pour diviser la pièce (10) en deux ailes (15, 16) perpendiculaires l'une par rapport à l'autre de forme générale plane, la pièce (10) comprenant en outre:
une zone de fixation sur l'une des ailes (15), qui présente des trous (19, 20) pour permettre à des organes de fixation de fixer le support à l'une des faces de la poutre (17);
une zone d'appui (25) sur l'autre aile (16), qui repose horizontalement en cours d'utilisation sur la structure porteuse (26) pour transmettre la charge de la poutre (17) à la structure porteuse (26);
et des moyens (18) définissant une position pour l'une des extrémités de la poutre (17) afin que cette extrémité puisse être située entièrement en-dehors de la zone d'appui (25);
le pli dans la pièce en tôle formant une arête rigide qui s'étend en cours d'utilisation le long d'un bord horizontal de l'une des faces verticales de la poutre (17) et sur au moins la majeure partie de la zone d'appui (25) pour rigidifier la zone d'appui (25) et transmettre la charge de la poutre (17) sur une surface de la structure porteuse (26) s'étendant au-delà de son bord avant;
caractérisé en ce que la pièce (10) en tôle a une forme générale rectangulaire légèrement oblongue et le pli (11) formant l'arête rigide traverse la pièce obliquement depuis un de ses angles (12) pour venir couper le côté le plus long (13) du rectangle oblong au voisinage de l'angle opposé (14).
2. Support de poutre selon la revendication 1, caractérisé en ce que, en plus de la zone d'appui (25), l'autre aile (16) présente aussi une zone de soutien (23) qui s'étend en cours d'utilisation sous la poutre (17), et que la largeur de l'autre aile (16) est maximale dans la région (21) où la zone d'appui (25) et la zone de soutien (23) se rencontrent.
3. Support de poutre selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens (18) définissant une position pour l'une des extrémités de la poutre (17) comportent une ou plusieurs saillies métalliques estampées hors du plan de l'aile (15, 16).
4. Support de poutre selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens (18) définissant une position pour l'une des extrémités de la poutre (17) comportent une ou plusieurs saillies métalliques estampées hors du plan de l'aile (15,16).
5. Support de poutre selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les moyens définissant une position pour l'une des extrémités de la poutre (17) comportent une ou plusieurs ouvertures (18) à travers lesquelles on peut voir l'extrémité de la poutre (17).
6. Support de poutre selon l'une quelconque des revendications précédentes, caractérisé en ce que des ouvertures (29) destinées à recevoir des organes de fixation zone ménagées dans la zone d'appui (25).
7. Support de poutre selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'une ou plusieurs entailles d'adent (27) sont ménagées dans la zone d'appui (25).
8. Structure de bâtiment, caractérisé en ce qu'elle comprend une structure porteuse (26) telle qu'un mur de maçonnerie; une poutre (17); et un support de poutre (10) selon l'une quelconque des revendications précédentes, assujettissant la poutre (17) à la structure porteuse.
EP19800105565 1979-09-28 1980-09-17 Support pour poutre utilisé dans le bâtiment et structure de bâtiment comprenant un tel support Expired EP0026397B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7933744 1979-09-28
GB7933744 1979-09-28

Publications (3)

Publication Number Publication Date
EP0026397A2 EP0026397A2 (fr) 1981-04-08
EP0026397A3 EP0026397A3 (en) 1981-06-03
EP0026397B1 true EP0026397B1 (fr) 1984-03-21

Family

ID=10508155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800105565 Expired EP0026397B1 (fr) 1979-09-28 1980-09-17 Support pour poutre utilisé dans le bâtiment et structure de bâtiment comprenant un tel support

Country Status (3)

Country Link
EP (1) EP0026397B1 (fr)
DE (1) DE3067163D1 (fr)
IE (1) IE50239B1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4546579A (en) * 1983-02-15 1985-10-15 Gang-Nail Systems, Inc. Seat plate protecting structural members
GB8316644D0 (en) * 1983-06-18 1983-07-20 Press Bat Holdings Ltd Butt jointing timbers in building
FR2645568B1 (fr) * 1989-04-07 1995-03-31 Ricard Coffrages Bride d'assemblage, son procede de fabrication, et pieces metalliques d'armature ou de charpente equipees d'une telle bride
GB2433269A (en) * 2005-12-14 2007-06-20 Harold John Andrews Joist hanger or similar support for a timber joist or the like
GB2487938B (en) * 2011-02-08 2014-02-19 Simpson Strong Tie Co Inc Angle bracket for fastening a first construction element to a second construction element and method for producing an angle bracket
CA2994193A1 (fr) * 2015-07-31 2017-02-09 Marc DELFELD Connection part

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1945925A (en) * 1932-11-08 1934-02-06 Stiefel William Metallic tie structure
US2751644A (en) * 1953-12-14 1956-06-26 Axel V Pedersen Joist hanger
GB868578A (en) * 1959-09-09 1961-05-17 Arthur Leonard Wallis Improvements in and relating to metallic timber connectors
US3258282A (en) * 1962-11-14 1966-06-28 Timber Engineering Co End-to-end beam joint and connector
US4003179A (en) * 1976-01-21 1977-01-18 Simpson Manufacturing Co., Inc. Truss hanger
GB2027477B (en) * 1978-07-26 1982-07-21 Bat Building Joist hanger

Also Published As

Publication number Publication date
IE801929L (en) 1981-03-28
EP0026397A3 (en) 1981-06-03
IE50239B1 (en) 1986-03-05
EP0026397A2 (fr) 1981-04-08
DE3067163D1 (en) 1984-04-26

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