EP0891449B1 - Method for the production of a prestressed plate-shaped building component - Google Patents

Method for the production of a prestressed plate-shaped building component Download PDF

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Publication number
EP0891449B1
EP0891449B1 EP97919814A EP97919814A EP0891449B1 EP 0891449 B1 EP0891449 B1 EP 0891449B1 EP 97919814 A EP97919814 A EP 97919814A EP 97919814 A EP97919814 A EP 97919814A EP 0891449 B1 EP0891449 B1 EP 0891449B1
Authority
EP
European Patent Office
Prior art keywords
laminations
bars
tension bars
anchoring means
holes
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
EP97919814A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0891449A1 (en
Inventor
Karl Martin Gustafsson
Karl Sören HÄGGLUND
John Haakan Aron Johnsson
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.)
NORRA MASSIVTRAE AB
Original Assignee
Norra Massivtra AB
NORRA MASSIVTRAE AB
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 Norra Massivtra AB, NORRA MASSIVTRAE AB filed Critical Norra Massivtra AB
Publication of EP0891449A1 publication Critical patent/EP0891449A1/en
Application granted granted Critical
Publication of EP0891449B1 publication Critical patent/EP0891449B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • E01D19/125—Grating or flooring for bridges
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/12—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of solid wood
    • E04C2/14—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of solid wood reinforced
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/10—Wood

Definitions

  • the present invention relates to a method for the production of a prestressed plate-shaped building component.
  • the invention relates to a method for the production of such a building component of the kind comprising a plurality of elongate laminations of wood, placed in side-by-side relationship and held in contact under pressure with each other in an elastically compressed state by a plurality of mutually spaced transverse tension bars of metal, which extend each through one row of through holes in the laminations and which, at their ends, are provided with anchoring means, projecting in lateral directions therefrom and bearing under pressure against cooperating bearing surfaces of the two outer laminations, provided at the outer sides of said laminations.
  • Building components of said kind are utilized especially as structural floor components in buildings and bridges. However, they may be utilized also for other purposes. For instance, they may be used as structural wall elements.
  • the anchoring means mounted on the tension bars have usually been formed by nuts, mounted on threaded end portions of said bars, and washers placed behind said nuts.
  • the invention therefore has for its purpose to provide an improved and more rational method for the production of a prestressed plate-shaped building component of the kind initially specified.
  • the method is primarily characterized by placing the laminations in desired side-by-side positions upon a substrate and subjecting the laminations so placed to an edge pressing operation, during which they are elastically compressed in a direction transverse to their longitudinal direction by means of press jaws, bearing against the two outer laminations, and then holding the laminations in an elastically compressed state by means of said press jaws until a lasting elastic compression of the laminations has been secured by means of tension bars, inserted each through one row of holes in the laminations, and anchoring means, mounted at the ends of said bars.
  • the laminations may preferably be held in close contact with the substrate by holding-down means, applied against the upper sides of the laminations.
  • the edge pressing operation may preferably be performed by means of two rows of consecutive press jaws which, within each row, bear against one of the two outer laminations and which, within each row, define intermediate free gaps therebetween, located within the regions of the tension bars and the anchoring means.
  • the insertion of the tension bars through said holes may preferably be effected after the edge pressing operation.
  • the tension bars may suitably be provided with anchoring means at their one ends before the insertion of said bars through said holes in the laminations, while anchoring means are mounted at the other ends of said bars after the insertion of the bars through said holes.
  • the tension bars may preferably be provided with anchoring means formed by metal plates, welded to the tension bars at the ends of said bars. These metal plates may suitably be welded to the end surfaces of the tension bars in butt contact with said surfaces through a flash-welding process.
  • the building component shown in Figure 1 and generally designated 10 comprises a plurality of elongate laminations 11 of wood, placed in side-by-side relationship and held in contact under pressure with each other in an elastically compressed state by a plurality of mutually spaced transverse tension bars 12 of metal, which extend each through one row of through holes 13 ( Figure 3) in laminations 11 and which at their ends are provided with anchoring means 14, projecting in lateral directions therefrom and bearing under pressure against cooperating bearing surfaces 15 of the two outer laminations, provided at the outer sides of said laminations.
  • Anchoring means 14 are formed by metal plates having a generally square or rectangular shape, which are welded to the tension bars 12 in butt contact with the end surfaces of said bars. At their outer sides, the two outer laminations 11 are provided with longitudinally extending grooves 16, in which metal plates 14 may be received in a fully countersunk state and in contact with the bottom surfaces of said grooves, which form said bearing surfaces 15.
  • FIG. 2 there is shown an edge pressing equipment comprising a press table 17, upon which laminations 11 are placed in side-by-side positions with their one ends in contact with a transverse elongate stop 18 and with one of the two outer laminations in close contact with a row of stationary press jaws 19.
  • laminations 11, now being in the state illustrated in Figure 3, are then subjected to an edge pressing operation, during which they are elastically compressed in a direction transverse to their longitudinal direction by means of a row of movable press jaws 20, which may be applied against the other one of the two outer laminations 11 by means of hydraulic cylinders 21. Through this elastic compression, laminations 11 are brought to assume the state shown in Figure 4.
  • laminations 11 are, during the edge pressing operation, held in close contact with press table 17, which serves as a substrate therefor.
  • a plate 22, serving as a holding-down means has been indicated in dash-dotted lines. Said plate may be brought into contact under pressure against the upper sides of laminations 11 by any suitable means not shown.
  • the movable press jaws 20 and the cooperating fixed press jaws 19 may preferably be arranged to apply the desired compression pressure to the outer laminations 11 by being brought into close contact with the bottom surfaces of the longitudinal grooves 16 provided in said laminations.
  • tension bars 12 may already be provided with metal plates 14, previously welded thereto, at their one ends. These metal plates, which serve as anchoring means, are brought into close contact with the bearing surface 15 of one of the two outer laminations. The other, free ends of tension bars 12 will then project a short distance from the bearing surface 15 of the other one of the two outer laminations.
  • a second anchoring means 14, consisting of a metal plate, is then welded to the latter end of each tension bar 12 through an electric flash-welding process.
  • a porcelain sleeve 23 is mounted in a central position on each plate 14.
  • the fixed press jaws 19 and the movable press jaws 20 are designed so as to cause adjacent jaws of each kind to define free gaps therebetween within said regions.
  • Figure 7 shows two building components 10 which are located side-by-side and have their adjacent lateral surfaces in close contact with each other.
  • Reference numeral 24 designates blocks of wood, serving as guide means between the two building components 10 and received in portions of the two opposite grooves 16 located between adjacent anchoring means 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rod-Shaped Construction Members (AREA)
EP97919814A 1996-04-03 1997-04-02 Method for the production of a prestressed plate-shaped building component Expired - Lifetime EP0891449B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9601293 1996-04-03
SE9601293A SE506413C2 (sv) 1996-04-03 1996-04-03 Förspänt skivformigt byggelement jämte sätt för framställning av ett dylikt byggelement
PCT/SE1997/000525 WO1997037084A1 (en) 1996-04-03 1997-04-02 Prestressed plate-shaped building component and method for the production of such a building component

Publications (2)

Publication Number Publication Date
EP0891449A1 EP0891449A1 (en) 1999-01-20
EP0891449B1 true EP0891449B1 (en) 2001-09-12

Family

ID=20402080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97919814A Expired - Lifetime EP0891449B1 (en) 1996-04-03 1997-04-02 Method for the production of a prestressed plate-shaped building component

Country Status (5)

Country Link
EP (1) EP0891449B1 (da)
DE (1) DE69706662T2 (da)
DK (1) DK0891449T3 (da)
SE (1) SE506413C2 (da)
WO (1) WO1997037084A1 (da)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU730487B2 (en) * 1997-09-22 2001-03-08 Holmes For Doors And Related Products Pty Ltd A panel assembly
DE19806998A1 (de) * 1998-02-19 1999-08-26 Konstruktion Holz Werk Khw Seu Holzplatte
JP5902560B2 (ja) * 2012-06-06 2016-04-13 株式会社エスイー 緊急避難台用床版
ITPD20120230A1 (it) * 2012-07-26 2014-01-27 Doriano Canella Sistema di ancoraggio per pannello strutturale in legno

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE651924A (da) * 1964-08-12
DE2316899C3 (de) * 1973-04-04 1979-03-29 Karl Merk Holzbau Kg, 8890 Aichach Bauelement

Also Published As

Publication number Publication date
DE69706662T2 (de) 2002-06-20
SE9601293D0 (sv) 1996-04-03
DE69706662D1 (de) 2001-10-18
EP0891449A1 (en) 1999-01-20
DK0891449T3 (da) 2001-12-17
SE9601293L (sv) 1997-10-04
WO1997037084A1 (en) 1997-10-09
SE506413C2 (sv) 1997-12-15

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