EP1816271A2 - Verbesserungen bei oder in Zusammenhang mit Balken und Bodenplatten - Google Patents

Verbesserungen bei oder in Zusammenhang mit Balken und Bodenplatten Download PDF

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Publication number
EP1816271A2
EP1816271A2 EP07250300A EP07250300A EP1816271A2 EP 1816271 A2 EP1816271 A2 EP 1816271A2 EP 07250300 A EP07250300 A EP 07250300A EP 07250300 A EP07250300 A EP 07250300A EP 1816271 A2 EP1816271 A2 EP 1816271A2
Authority
EP
European Patent Office
Prior art keywords
joist
section
enlargement means
width enlargement
socket
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.)
Withdrawn
Application number
EP07250300A
Other languages
English (en)
French (fr)
Other versions
EP1816271A3 (de
Inventor
Roger Smith
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.)
Howarth Timber Engineering Ltd
Original Assignee
Howarth Timber Engineering 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
Priority claimed from GB0602098A external-priority patent/GB0602098D0/en
Application filed by Howarth Timber Engineering Ltd filed Critical Howarth Timber Engineering Ltd
Publication of EP1816271A2 publication Critical patent/EP1816271A2/de
Publication of EP1816271A3 publication Critical patent/EP1816271A3/de
Withdrawn legal-status Critical Current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 concerns joists which are employed in pre-fabricated floor panels and in particular to locating and supporting the ends of such joists. It is to be understood that a floor panel between floors of a building can also be thought of as a ceiling panel when viewed from below and the expression floor panel employed herein is intended to cover both.
  • Each panel is comprised of a plurality of parallel spaced apart joists below and secured to a decking sheet of wood such as plywood or chipboard or the like.
  • the latter typically includes lifting eyes by which the assembly can be craned into place in a building under construction.
  • the load bearing components of the panel are the joists, it is necessary for at least the ends of the joists to rest on load bearing walls or into the sockets of joist hangers attached to walls or timber beams.
  • This method of assembly of the floors and ceilings of a building is especially popular in the case of so-called timber framed buildings, where the load bearing walls are constructed from timber panels which are secured at their ends to form corners or longer runs of walls. Furthermore it is customary for the buildings to be pre-assembled where the wall and floor panels are constructed. In this way it is possible to determine the positions of the joists relative to ring beam timbers or upper edges of wall panels or intermediate beams on which they are to be supported, and the joist hangers can be secured to the relevant timbers while the floor panels are in position. The floor panels can then be lifted clear of the supporting joist hangers and the pre-assembled building parts dismantled to allow them to be shipped to where the building is to be permanently constructed.
  • the assembly of floor panels to beams and walls is greatly simplified.
  • the nails or screws used to secure the ends of the joists to the cheeks of the hangers can be inserted after the panel has been lowered into position, since the ends of the joists will be fully supported by the hangers even though they are not secured to the cheeks of the hangers.
  • a modified joist hanger (hereinafter referred to as a hanger of the type described) which comprises two side cheeks defining an open-topped channel in which in use a joist end is located, and a bridge section which joins the lower ends of the two cheeks on which the underside of the joist will rest, in which the two side cheeks diverge from the bridge to facilitate entry thereinto by a joist.
  • each joist end By providing diverging cheeks in the hangers to facilitate the introduction of the joists into the sockets, conventional joists will only be gripped between the cheeks at the bottom of each socket. Whilst this may be acceptable it is preferable for each joist end to be held captive over the full depth of the joist.
  • the present invention seeks to provide means by which the ends of conventional joist can be modified to enable it to be used with hangers modified as aforesaid.
  • width enlargement means is provided adapted to be attached to a joist end to adapt the latter for use with a joist hanger having diverging side cheeks in a joist receiving socket therein, whereby the width enlargement means causes at least part of the cross section of the end of the joist to become trapezoidal so as to form a wedge, the inclined faces of which in use engage the diverging side cheeks of the socket thereby to provide support for the joist end when fitted in the joist receiving socket of the hanger.
  • joists are normally formed with a rectangular cross-section or an I-shaped cross-section.
  • Width enlargement means in accordance with the invention can be adapted for attachment to either of these types of joist, or indeed any other type of joist.
  • the width enlargement means comprises triangular cross section fillets, which are adapted to be fitted to the opposite faces of the end of a conventional rectangular cross section joist so as to fill the space between each face of the joist and the side cheeks of the hanger.
  • the fillets may for example be of wood or metal or rubber or plastics material and they may be nailed, screwed or stuck to the joist faces.
  • the joist preferably, but not necessarily, comprises or consists of timber or wooden material.
  • the two fillets are replaced by a single wedge shaped member having a central slot into which the end of a joist can be fitted.
  • a single wedge shaped member having a central slot into which the end of a joist can be fitted.
  • Such a member may be secured to the joist a by nailing or screwing or by an adhesive or by virtue of interference fit between the sides of the slot and the joist.
  • the two fillets may be secured for example to opposite faces of the central web of the I-beam.
  • a slotted wedge may be provided wherein the slot is adapted to receive, and be secured to, the end of the central web of an I-beam joist.
  • a metal structure may be provided which is adapted to be fitted to one end of a conventional I-beam section joist, such that when fitted thereto the outer faces of the metal structure are spaced by a greater distance in the region of the upper rail than they are in the region of the lower rail, so as to form the trapezoidal shape.
  • the metal structure may be constructed from a single part or from two or more parts.
  • the or each part comprises a sheet metal pressing or casting.
  • the metal structure may be adapted to be secured to the central web alone, or to the upper or lower rails of the I-beam section, or to the web and one of the rails, or to the upper and lower rails only, or to both rails and the web.
  • the included angle between the inclined faces of the fillets, or external faces of the metal structure is substantially the same as, but not greater than, that between the diverging cheeks of the joist hanger of the type described in which the joist is received in use.
  • the invention is of particular benefit when constructing intermediate floors and ceilings of buildings, in which the area of each floor is such as to require it to be made of two (or more normally a large number of) different panels, and intermediate beams extend across the building to act as supports for the adjacent ends of pairs of such panels, with joist hangers of then type described attached to opposite faces of each intermediate beam, so as to receive and support the ends of the joists of the panel on either side thereof.
  • Such beams may be the sole support for a panel, but where walls are available to support one or more edges of a panel, one or both of the outermost joists may for example rest on the top of a wall and/or a traversely extending timber closure may be secured to the ends of the joists at one end of the panel to enclose that end and in that event it is the closure which will rest on the top of a wall.
  • the beam carrying the joist hangers will itself rest on walls at each end and its depth will be selected so that the bridge sections of the joist hangers are located at the correct height to support the undersides of the joists and the upper edge of the beam will be below the underside of the decking sheet secured to the upper faces of the joists.
  • the invention also provides a joist in combination with width enlargement means as defined above.
  • the invention also lies in a pre-fabricated floor panel comprising a decking sheet supported by and secured to an array of parallel spaced apart joists in which width enlargement means according to the first aspect of the invention are fitted to at least one end of each joist to assist in guiding these joist ends into corresponding trapezoidal shaped joist hangers.
  • the decking sheet may be made of timber or other wooden material, such as chipboard, fibreboard, plywood or the like. Conveniently the joists will be predominantly formed of timber.
  • the invention also lies in a method of locating a pre-fabricated floor panel comprising a decking sheet supported by and secured to an array of parallel spaced apart joist, into a building during construction, comprising the steps of:-
  • the invention may comprise any optional feature described herein in isolation or in combination with any one or more other optional features described herein.
  • Fig. 1 shows how conventional joists such as 10 and conventional joist hangers such as 12 need to be precisely aligned before a floor panel such as 14 can be lowered into position, so that the ends of the joists will slide down between the parallel side cheeks 16, 18 of the conventional joist hangers. Any misalignment will prevent the placement of the floor panel, and can damage the side-cheeks of the hangers.
  • Modified hangers such as shown in Fig. 2 can be used with conventional rectilinear cross-section joists such as shown at 10 in Fig. 1.
  • the cross section of at least the end of each joist 10A is modified by width enlargement means (11, 13) so as to correspond more precisely to the shape of each joist hanger socket.
  • the joists 10A shown in Fig. 2 are of I-beam cross-section and the width enlarging means for such joists are described in more detail with reference to Figs. 4 and 5.
  • the end width enlargement can be as shown in Fig. 3. This is achieved by securing two wedge-shaped width enlarging members 26, 28 on opposite faces of the joist so as to form a trapezoidal cross-section when viewed end-on.
  • the increased width at the widened top of the joist cross-section is made commensurate with the spacing between the upper ends of the side cheeks 22, 24 of the modified hangers 20 shown in Fig. 2.
  • the lower end of the end cross-section will be substantially the same as the thickness of the joist 10, which corresponds to the spacing between the parallel socket cheeks 16, 18 of joist hangers 12 of Fig. 1
  • the wedges 26, 28 may be blocks of wood, metal or plastics or rubber or composites thereof and may be solid or hollow. They may be formed in any convenient manner e.g. by cutting, moulding, casting, pressing etc.
  • two generally wedge-shaped width enlarging members 30, 32 may be fitted, this time to opposite faces of the web 34 of the I-beam cross-section, as shown in Fig. 4.
  • the two members 30, 32 are cut-away at their upper ends so as to accommodate the upper rail 36 of the I-beam.
  • the lower ends of the enlarging members 30, 32 rest on the lower I-beam rail 38 of the joist.
  • the wedge shaped width enlargement members 30, 32 may be of wood or metal or plastics or rubber or composites thereof and may be solid or hollow.
  • width enlarging wedges 26, 28 or 30, 32 may be secured in place for example by an adhesive or by staples, nails, screws or pins, or any other convenient fixative.
  • the wedges 26, 28 or 30, 32 may extend over more of, or even all of the length of a joist, although it is generally preferred to limit the extent of the wedges substantially to the end regions of the joists, which end regions are to be received in the trapezoidal joist receiving sockets of the hanger.
  • Figs. 5 and 5A show how metal brackets 40, 42 can form width enlargement means.
  • upper (37, 39) and lower (41, 43) flanges of metal brackets 40, 42 can be fixed as by staples, nails or screws such as 44 to the upper and lower faces of a joist, so as to produce in the end region of the joist a hollow trapezoidal shape which corresponds to that of the diverging side-cheeks 22, 24 of the modified hangers.
  • Figs. 2 and 6 also show how the floor panel can be modified so as to resist bending as can occur when being lifted and lowered by a crane as indicated in Fig. 2.
  • a tie rod 45 extends across the width of the panel, the rod is threaded at both ends and is secured in place by nuts and washers at each end, such as 46, 48.
  • nuts and washers at each end, such as 46, 48.
  • noggins of wood, plastics or metal 50, 52 and 54 which may be glued or otherwise secured at their ends to the joists, but are put in compression as the tie rod 45 is tensioned by tightening nuts 46, so as to rigidly space apart the joists.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Floor Finish (AREA)
  • Joining Of Building Structures In Genera (AREA)
EP07250300A 2006-02-02 2007-01-25 Verbesserungen bei oder in Zusammenhang mit Balken und Bodenplatten Withdrawn EP1816271A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0602098A GB0602098D0 (en) 2006-02-02 2006-02-02 Improvements in and relating to joist hangers and pre-fabricated floor panels
GB0606834A GB2434809B (en) 2006-02-02 2006-04-05 Improvements in and relating to joists and floor panels containing same

Publications (2)

Publication Number Publication Date
EP1816271A2 true EP1816271A2 (de) 2007-08-08
EP1816271A3 EP1816271A3 (de) 2008-07-16

Family

ID=38009744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07250300A Withdrawn EP1816271A3 (de) 2006-02-02 2007-01-25 Verbesserungen bei oder in Zusammenhang mit Balken und Bodenplatten

Country Status (2)

Country Link
US (1) US20070193194A1 (de)
EP (1) EP1816271A3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2487382A (en) * 2011-01-19 2012-07-25 Intelligent Wood Systems Ltd An arrangement, which is suitable for transporting timber separating floor and ceiling panels

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7448171B1 (en) * 2005-10-27 2008-11-11 The Steel Network, Inc. Joist support structure adapted to be embedded into a foundation wall
KR101233931B1 (ko) * 2010-09-30 2013-02-15 김충기 조립식 지지빔구조체 및 조립식 지지빔구조체의 설치방법
AU2021299316A1 (en) 2020-07-01 2023-02-02 Omg, Inc. Expandable hanger for beam
SE545955C2 (en) * 2021-09-06 2024-03-26 Moditri Ab A set of structural panels, a production method, and an assembly method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB223120A (en) * 1924-02-22 1924-10-16 Aristide Daniel Improvements relating to the construction of moulded floors and the like
AT181950B (de) * 1946-12-14 1955-05-10 Adolf Kirchner Schuh für die Auflagerung der fertigen Rippen (Balken) von Stahlbetonrippen- bzw. Stahlbetonbalkendecken

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US478163A (en) * 1892-07-05 Wrought-metal hanger for joists
US625427A (en) * 1899-05-23 Wrought-metal joist-hanger
US679349A (en) * 1900-12-24 1901-07-30 Julius Tuteur Joist-hanger.
US770050A (en) * 1904-04-18 1904-09-13 William D Dreyer Joist-hanger.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB223120A (en) * 1924-02-22 1924-10-16 Aristide Daniel Improvements relating to the construction of moulded floors and the like
AT181950B (de) * 1946-12-14 1955-05-10 Adolf Kirchner Schuh für die Auflagerung der fertigen Rippen (Balken) von Stahlbetonrippen- bzw. Stahlbetonbalkendecken

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2487382A (en) * 2011-01-19 2012-07-25 Intelligent Wood Systems Ltd An arrangement, which is suitable for transporting timber separating floor and ceiling panels
GB2487382B (en) * 2011-01-19 2016-03-23 Intelligent Wood Systems Ltd Assembly and transport system for separating timber floors and ceilings

Also Published As

Publication number Publication date
EP1816271A3 (de) 2008-07-16
US20070193194A1 (en) 2007-08-23

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