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EP1473420B1 - Poutres - Google Patents

Poutres Download PDF

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Publication number
EP1473420B1
EP1473420B1 EP04252159A EP04252159A EP1473420B1 EP 1473420 B1 EP1473420 B1 EP 1473420B1 EP 04252159 A EP04252159 A EP 04252159A EP 04252159 A EP04252159 A EP 04252159A EP 1473420 B1 EP1473420 B1 EP 1473420B1
Authority
EP
European Patent Office
Prior art keywords
joist
joists
chords
block
length
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 - Lifetime
Application number
EP04252159A
Other languages
German (de)
English (en)
Other versions
EP1473420A1 (fr
Inventor
Paul Baron
Alan Peter Shuttle
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.)
Aldershot GNS Ltd
Original Assignee
Gang Nail Systems 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 Gang Nail Systems Ltd filed Critical Gang Nail Systems Ltd
Publication of EP1473420A1 publication Critical patent/EP1473420A1/fr
Application granted granted Critical
Publication of EP1473420B1 publication Critical patent/EP1473420B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/291—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures with apertured web
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/16—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with apertured web, e.g. trusses
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/292—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being wood and metal

Definitions

  • This invention relates to joists, a term intended to cover similar structural components such as beams, struts or ties.
  • Some known joists are fabricated in a factory to required lengths and delivered to the job site. On arrival at the job site, the joist is sometimes found to be under or over length: extending the length of a joist is virtually impossible and shortening the length of a joist by cutting is difficult because typical joists have metal webs.
  • joists with trimmable ends of wood have been made available but these have not satisfied the dual requirements of being capable of being trimmed to a desired length and also readily supported at their ends in a wall or by a joist hanger.
  • Document US-A-4501102 discloses (see figures 1 and 3 ) a joist (10), with upper and lower chords (11, 12) interconnected by web means (14), wherein the identical ends of the joist have a block of wood or wood substitute (35, 36) of a width corresponding to the width of the chords, whreby each end of the joist is of solid material which can be cut through at any position on the joist end to enable the joist to be trimmed to a desired length on site.
  • each joist comprising longitudinally extending upper and lower chords interconnected by web means, wherein each end of each joist has a block of wood (or wood substitute) which spans and interconnects the upper and lower chords and which has a width corresponding to the width of the chords, whereby said each end of the joist is of solid material which can be cut through at any position on the joist end to enable the joist to be trimmed to a desired length on site, and wherein the plurality of joists comprises at least two joists of differing lengths, and each joist having trimmable ends of the same length, the difference in length between the joists being less than the combined length of the trimmable ends of either joist.
  • the or each block may be connected to the chords by any convenient means, but a mechanical connection employing nails or tangs is preferred.
  • each joist Preferably the two ends of each joist are identical, each having a corresponding block of wood (or wood substitute) and each being capable of being cut to enable the joist to be trimmed to size.
  • the or each block is preferably softwood but may be a substitute made from other materials, e.g. reconstituted plastic.
  • the web means may be of metal, conveniently being v-shaped metal webs attached to both facing sides of the chords.
  • the invention can be extended to any plural number of joists, for example six in the specific embodiment to be described.
  • the series of six modular joists shown in Figures 1A to 1F have respective overall lengths of 4,800mm, 4,200mm, 3,600mm, 3,000mm, 2,400mm and 1,800mm. At each end of each joist there is an end portion 10 having a length of 350mm.
  • the joists have respective central portions 12 with lengths of 4,100mm, 3,500mm, 2,900mm, 2,300mm, 1,700mm and 1,100mm. Apart from the lengths of the central portions 12, the six joists are identical so the shorter joist shown in Figure 1 will now be described in detail.
  • the shorter joist has wooden upper and lower chords 14, 16 each of which is of the same rectangular cross-sectional shape and extends for the complete length of the joist. Over the central portion 12 of the joist, the chords are interconnected by V-shaped metal webs 18 which are nail plated to the outwardly-facing edges of the chords 14, 16, so the central portion 12 is hollow and can accommodate services such as wiring or plumbing.
  • the volume between the chords 14, 16 is filled by a solid wooden block 20 the upper surface of which is rigidly attached to the undersurface of the chord 14 and the lower surface of which is rigidly attached to the upper surface of the chord 16.
  • the block 20 has a width identical to the width of the chords 14, 16 so that in cross-section the end portion 10 presents a rectangular shape.
  • Figures 3 and 4 show how a 50mm length at the end of each block 20 adjoining the central portion 12 is chamfered at 22 to receive the ends of the adjacent metal webs 18.
  • each end portion 10 is of solid wooden material (made up of the upper and lower chords 14, 16 and the wooden block 20) the end portion 10 can be sawn transversely to the length of the joist to enable the joist to be trimmed to length on the job site.
  • a joist of any length can be obtained by appropriate trimming of a joist end.
  • the joist end presents a rectangular cross-sectional shape which is devoid of recesses.
  • This rectangular cross-sectional shape makes it easier for the joist end to be secured to a joist hanger (which can be attached directly to the planar sides of the joist end) or for the joist end to be built into a wall.
  • the dimensions of the joists, chords and block may vary but four exemplary sets of dimensions are given in millimetres in the four lines of the table below.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Floor Finish (AREA)
  • Tea And Coffee (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (7)

  1. Pluralité de poutres, chaque poutre comprenant des membrures supérieure et inférieure (14, 16) s'étendant longitudinalement, interconnectées par des moyens d'âme (18), chaque extrémité de chaque poutre ayant un bloc de bois ou de produit de substitution du bois (20) qui s'étend entre les membrures supérieure et inférieure (14, 16) et les relie entre elles et dont la largeur correspond à la largeur des membrures (14, 16), chaque dite extrémité de la poutre étant fabriquée en matériau massif qui peut être coupé en une position quelconque sur l'extrémité de la poutre pour permettre de tailler la poutre à la longueur souhaitée sur le site, la pluralité de poutres comprenant au moins deux poutres de longueurs différentes, et chaque poutre ayant des extrémités pouvant être taillées, de la même longueur, la différence de longueur entre les poutres étant inférieure à la longueur combinée des extrémités pouvant être taillées de l'une ou l'autre poutre.
  2. Pluralité de poutres selon la revendication 1, dans laquelle le ou chaque bloc (20) est en bois tendre.
  3. Pluralité de poutres selon la revendication 1, dans laquelle le ou chaque bloc (20) est un produit de substitution du bois fabriqué en plastique reconstitué.
  4. Pluralité de poutres selon l'une quelconque des revendications 1 à 3, dans laquelle les deux extrémités de chaque poutre sont identiques, chacune ayant un bloc correspondant (20) en bois ou en produit de substitution du bois, et chacune pouvant être coupée pour permettre de tailler la poutre à la dimension voulue.
  5. Pluralité de poutres selon l'une quelconque des revendications précédentes, dans laquelle chaque bloc (20) est connecté aux membrures (14, 16) par une connexion mécanique employant des clous ou des tenons.
  6. Pluralité de poutres selon l'une quelconque des revendications précédentes, dans laquelle les moyens d'âme (18) sont des âmes en métal en forme de V attachées aux deux côtés en regard des membrures.
  7. Pluralité de poutres selon l'une quelconque des revendications précédentes, caractérisée en ce qu'il y a six poutres.
EP04252159A 2003-05-01 2004-04-13 Poutres Expired - Lifetime EP1473420B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0310032A GB2401123B (en) 2003-05-01 2003-05-01 Joists
GB0310032 2003-05-01

Publications (2)

Publication Number Publication Date
EP1473420A1 EP1473420A1 (fr) 2004-11-03
EP1473420B1 true EP1473420B1 (fr) 2009-03-11

Family

ID=9957368

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04252159A Expired - Lifetime EP1473420B1 (fr) 2003-05-01 2004-04-13 Poutres

Country Status (4)

Country Link
EP (1) EP1473420B1 (fr)
AT (1) ATE425316T1 (fr)
DE (1) DE602004019837D1 (fr)
GB (1) GB2401123B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE548219T1 (de) * 2007-01-29 2012-03-15 Rolfo Spa Eingriffvorrichtung zur regulierung der betriebsposition von manuellen platten für belade-/entladefahrzeuge

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB628032A (en) * 1946-01-31 1949-08-19 Alexander Anderson Improvements in and relating to structural members for the construction of houses orother structures
US4207719A (en) * 1978-04-03 1980-06-17 James Knowles Composite construction beam
US4501102A (en) * 1980-01-18 1985-02-26 James Knowles Composite wood beam and method of making same
CA2008043C (fr) * 1990-01-18 1999-12-28 Rene Paul Lemyre Poutre a ouvertures paralleles
US5852908A (en) * 1994-08-12 1998-12-29 Techtruss Holdings Pty. Ltd. Structural beam and web
US5592800A (en) * 1995-01-20 1997-01-14 Truswal Systems Corporation Truss with adjustable ends and metal web connectors
US20020148193A1 (en) * 2001-02-13 2002-10-17 Romaro 2000 Limitee Structural wooden joist

Also Published As

Publication number Publication date
EP1473420A1 (fr) 2004-11-03
DE602004019837D1 (de) 2009-04-23
GB2401123B (en) 2005-11-16
ATE425316T1 (de) 2009-03-15
GB0310032D0 (en) 2003-06-04
GB2401123A (en) 2004-11-03

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