EP0202612A2 - Laminated wood beam and method for producing the same - Google Patents

Laminated wood beam and method for producing the same Download PDF

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Publication number
EP0202612A2
EP0202612A2 EP86106636A EP86106636A EP0202612A2 EP 0202612 A2 EP0202612 A2 EP 0202612A2 EP 86106636 A EP86106636 A EP 86106636A EP 86106636 A EP86106636 A EP 86106636A EP 0202612 A2 EP0202612 A2 EP 0202612A2
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EP
European Patent Office
Prior art keywords
glued
chipboard
boards
solid wood
glulam
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EP86106636A
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German (de)
French (fr)
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EP0202612A3 (en
Inventor
Christof Schmidt-Hellerau
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BASF SE
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BASF SE
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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
    • E04C3/12—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members
    • E04C3/14—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of wood, e.g. with reinforcements, with tensioning members with substantially solid, i.e. unapertured, web

Definitions

  • the invention relates to a glued glulam beam with outer cover boards made of solid wood.
  • the invention has for its object to provide a glued glulam beam with outer cover boards made of solid wood, and a method for its production, the strength of which is not subject to fluctuations due to irregularities in the glued individual components.
  • the chipboard strips stand upright with respect to the solid wood cover boards.
  • a glued glulam beam is also proposed, which optionally has an outer cover board made of solid wood on the side of the beam that is subjected to tension, which is characterized in that it has glued chipboard strips of high-strength quality.
  • a glued glulam beam with a cover element applied to the tensile side of the girder is proposed, which is characterized in that the glulam beam has chipboard strips of high-strength quality that are glued together and that 1 to 4 layers of boards, plywood or other are used as the cover element flat wood material, e.g. a material commercially available under the trade name Kertopuu @ or long-to-long glued plywood material can be used.
  • the process for producing the glued glulam beams of the above type is characterized in that chipboard strips are glued flat to one another in the cold process or with high-frequency heating, the block of glued chipboard strips is trimmed in parallel and glued between outer cover sheets made of solid wood, or a cover board or cover element is glued on.
  • the chipboard used to manufacture the glued glulam beam according to the invention can be produced as follows:
  • the shavings of the top and middle layers of the chipboard consist for example of two thirds of oak wood and one third of softwood, preferably spruce or fir.
  • the chip thickness is between 0.3 and 0.6 mm.
  • the proportion of fine dust in the middle class should be less than 10%.
  • a melamine-urea-phenol-formaldehyde resin is preferably used as the glue, as described, for example, in DE-C-20 20 481 or DE-C-29 51 957.
  • the solid resin dosage, based on absolutely dry chips should be 13.0 to 15.0% by weight for the top layer and 11.0 to 13.0% by weight for the middle layer.
  • the Solid wax dosage based on absolutely dry chips should be 0.8 to 1.0% by weight for the top layer and 0.6 to 0.8% by weight for the middle layer.
  • the hardener used is preferably a dicarboxylic acid mixture (for example type 15 hardener in scale form from BASF Aktiengesellschaft) or a formaldehyde-binding hardener according to DE-A-34 00 669.
  • the chips In the poured chip cake, the chips should have a moisture content of approximately 9 to 11% by weight of the middle layer and 12 to 15% by weight in the cover layer.
  • the hydraulic press should allow a specific pressing pressure of 3.0 to 4.0 N / mm 2 so that the press can be run on spacer bars within 10 to 15% of the total pressing time despite the high density of the plates. Under these conditions, chipboard can be produced which corresponds to the characteristics mentioned at the outset and, as high-strength chipboard, is a requirement for the glued glulam beams according to the invention.
  • a laminated timber carrier of the invention for example, has a cross-section of 50 "15.4 cm, one goes, for example, as follows: There are chipboard described high-strength quality having a thickness of 22 mm into strips of 38 cm width cut. Seven pieces of these chipboard strips of any length are glued flat to one another with an approved wood-glue construction glue, preferably a melamine-urea-phenoi-formaidehyde resin according to DE-A-20 43 440 using the cold process or with high-frequency heating. The block of glued panels is trimmed parallel to a width of 36.8 cm. If there is no precision saw, calibration with a wide belt sander is recommended.
  • the block is then glued upright between 3 spruce boards each 22 mm thick with the aforementioned glues. In this way, a support of 50 cm in height is obtained, which is much cheaper to manufacture due to the replacement of 16 to 17 board layers of 22 mm by the high-strength chipboard.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Packaging Frangible Articles (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

A glued laminated girder is proposed with outer weather boards made of solid wood, which is characterised in that chipboard strips of high-strength quality, glued to one another, are arranged in the middle layers instead of solid-wood board. Alternatively, the girder can also consist of glued chipboards which stand on edge and are glued to one or more layers of boards or the like only on the underside of the girder. For specific intended uses, it is also possible to use a girder which consists only of a single glued on-edge block of high-strength chipboards.

Description

Die Erfindung betrifft einen verleimten Brettschichtholzträger mit außenliegenden Deckbrettern aus Massivholz.The invention relates to a glued glulam beam with outer cover boards made of solid wood.

Im Holzleimbau werden üblicherweise gerade Brettschichthoizträger aus mehreren Brettern, meist Nadelholz, einer Dicke von 22 bis 33 mm und einer Breite von 130 bis 240 mm aufeinander geleimt. Die Höhe des Trägers wird durch die Anzahl der Lagen bestimmt. Die Festigkeit der Träger wird sehr oft durch die Häufigkeit des Auftretens von Ästen bzw. Astlöchem und deren Größe negativ beeinflußt. Überdies sind Bretter aus Massivholz relativ kostspielig.In wood glue construction, straight glued laminated beams made of several boards, mostly softwood, with a thickness of 22 to 33 mm and a width of 130 to 240 mm are usually glued to each other. The height of the beam is determined by the number of layers. The strength of the beams is very often negatively influenced by the frequency of the appearance of branches or knotholes and their size. In addition, solid wood boards are relatively expensive.

Der Erfindung liegt die Aufgabe zugrunde, einen verleimten Brettschichtholzträger mit außenliegenden Deckbrettern aus Massivholz, sowie ein Verfahren zu seiner Herstellung bereitzustellen, dessen Festigkeit keinen Schwankungen aufgrund von Unregelmäßigkeiten der verleimten Einzelkomponenten unterliegt.The invention has for its object to provide a glued glulam beam with outer cover boards made of solid wood, and a method for its production, the strength of which is not subject to fluctuations due to irregularities in the glued individual components.

Diese Aufgabe wird gelöst mit einem verleimten Brettschichtholzträger der genannten Art, der dadurch gekennzeichnet ist, daß in den mittleren Lagen anstelle von Massivholzbrettern miteinander verleimte Spanplattenstreifen von hochfester Qualität angeordnet sind.This object is achieved with a glued glulam beam of the type mentioned, which is characterized in that chipboard strips of high-strength quality which are glued to one another are arranged in the middle layers instead of solid wood planks.

Nach einer bevorzugten Ausführungsform stehen die Spanplattenstreifen bezüglich der Deckbretter aus Massivholz hochkant.According to a preferred embodiment, the chipboard strips stand upright with respect to the solid wood cover boards.

Erfindungsgemäß wird in einer alternativen Ausführungsform auch ein verleimter Brettschichtholzträger vorgeschlagen, der gegebenenfalls ein außenliegendes Deckbrett aus Massivholz auf der auf Zug beanspruchten Seite des Trägers aufweist, der dadurch gekennzeichnet ist, daß er miteinander verleimte Spanplattenstreifen von hochfester Qualität aufweist.According to the invention, in an alternative embodiment, a glued glulam beam is also proposed, which optionally has an outer cover board made of solid wood on the side of the beam that is subjected to tension, which is characterized in that it has glued chipboard strips of high-strength quality.

Nach einer weiteren Variante der Erfindung wird ein verleimter Brettschichtholzträger mit einem auf der zugbeanspruchten Seite des Trägers aufgebrachten Deckelement vorgeschlagen, der dadurch gekennzeichnet ist, daß der Brettschichtholzträger miteinander verleimte Spanplattenstreifen von hochfester Qualität aufweist und daß als Deckelement 1 bis 4 Lagen Bretter, Sperrholz oder anderes flächiges Holzmaterial, z.B. ein unter der Handelsbezeichnung Kertopuu@ im Handel erhältliches Material, oder auch lang-auf-lang verleimtes Schichtsperrholzmaterial, eingesetzt werden.According to a further variant of the invention, a glued glulam beam with a cover element applied to the tensile side of the girder is proposed, which is characterized in that the glulam beam has chipboard strips of high-strength quality that are glued together and that 1 to 4 layers of boards, plywood or other are used as the cover element flat wood material, e.g. a material commercially available under the trade name Kertopuu @ or long-to-long glued plywood material can be used.

Das Verfahren zur Herstellung der verleimten Brettschichtholzträger der obigen Art ist dadurch gekennzeichnet, daß man Spanplattenstreifen im Kaltverfahren oder mit Hochfrequenzbeheizung flach aufeinander leimt, den Block aus verleimten Spanplattenstreifen parallel besäumt und zwischen äußeren Deckblättem aus Massivholz verleimt, beziehungsweise ein Deckbrett oder Deckelement aufleimt.The process for producing the glued glulam beams of the above type is characterized in that chipboard strips are glued flat to one another in the cold process or with high-frequency heating, the block of glued chipboard strips is trimmed in parallel and glued between outer cover sheets made of solid wood, or a cover board or cover element is glued on.

Im erfindungsgemäßen Brettschichtholzträger können die Bretter in der Mitte des Trägers teilweise oder vollständig ersetzt sein. Als Spanplattenstreifen oder -abschnitte verwendet man hochfeste Qualitäten. Beispielsweise kann man hochfeste Spanplatten der Qualität V 100 -E1 verwenden, welche die folgenden Kenndaten aufweisen:

  • Dichte kg/m3 800 -850
  • Blegefestigkeit N/mm2 30,0 -35,0
  • Querzugfestigkeit N/mm2 1,20-1,50
  • Quellung n. 24 h in % 3,0 -5,0
In the glulam beam according to the invention, the boards in the middle of the beam can be partially or completely replaced. High-strength qualities are used as chipboard strips or sections. For example, you can use high-strength chipboard of quality V 100 -E1, which have the following characteristics:
  • Density kg / m 3 800 -850
  • Lead strength N / mm 2 30.0 -35.0
  • Cross tensile strength N / mm 2 1.20-1.50
  • Swelling after 24 h in% 3.0 -5.0

Außerdem können auch in bestimmten Fällen sogenannte OSB-Spanplatten mit gerichteten langen Spänen Verwendung finden. Diese Platten haben folgende Kenndaten:

  • Dichte kg/m3 670 -700
  • Biegefestigkeit N/mm2 40,0 -45,0
  • Querzugfestigkeit N/mm2 0,60-0,80
  • Quellung n. 24 h in % 8,0 -10,0
In certain cases, so-called OSB chipboard with long chips can also be used. These plates have the following characteristics:
  • Density kg / m 3 670 -700
  • Flexural strength N / mm 2 40.0 -45.0
  • Cross tensile strength N / mm 2 0.60-0.80
  • Swelling after 24 h in% 8.0 -10.0

Dem Vorteil der höheren Biegefestigkeit steht bei den OSB-Platten der Nachteil der höheren Quellung und des wesentlich höheren Preises entgegen, so daß diese Plattenqualität nur für spezielle Anwendungszwecke in Frage kommen wird.The advantage of the higher flexural strength is opposed by the disadvantage of the higher swelling and the substantially higher price of the OSB boards, so that this board quality will only come into question for special applications.

Die zur Herstellung des erfindungsgemäßen verleimten Brettschichtholzträgers verwendeten Spanplatten lassen sich folgendermaßen herstellen:The chipboard used to manufacture the glued glulam beam according to the invention can be produced as follows:

Die Späne der Deck-und Mittelschicht der Spanplatte bestehen z.B. zu zwei Dritteln aus Eichenholz und zu einem Drittel aus Nadelholz, vorzugsweise Fichte oder Tanne. Die Spandicke liegt zwischen 0,3 und 0,6 mm. Der Anteil an Feinstaub in der Mittelschicht sollte unter 10 % liegen. Als Leim verwendet man vorzugsweise ein Melamin-Hamstoff-Phenol-Formaldehydharz, so, wie es beispielsweise in der DE-C-20 20 481 oder der DE-C-29 51 957 beschrieben ist. Die Festharzdosierung, bezogen auf absolut trockene Späne sollte für die Deckschicht bei 13,0 bis 15,0 Gew.% und für die Mittelschicht bei 11,0 bis 13,0 Gew.% liegen. Die Festwachs-Dosierung bezogen auf absolut trockene Späne, sollte bei der Deckschicht bei 0,8 bis 1,0 Gew.%, bei der Mittelschicht bei 0,6 bis 0,8 Gew.% liegen. Als Härter verwendet man vorzugsweise ein Dicarbonsäuregemisch (beispielsweise Härter vom Typ 15 in Schuppenform der BASF Aktiengesellschaft) oder einen Formaldehyd bindenden Härter gemäß DE-A-34 00 669. Im geschütteten Spankuchen sollten die Späne eine Feuchtigkeit von ungefähr 9 bis 11 Gew.% in der Mittelschicht und 12 bis 15 Gew.% in der Deckschicht aufweisen. Die hydraulische Presse sollte einen spezifischen Preßdruck von 3,0 bis 4,0 N/mm2 ermöglichen, damit die Presse trotz der hohen Dichte der Platten innerhalb von 10 bis 15 % der Gesamtpreßzeit auf Distanzleisten gefahren werden kann. Unter diesen genannten Voraussetzungen kann man Spanplatten herstellen, die den Eingangs genannten Kenndaten entsprechen und als hochfeste Spanplatten eine Voraussetzung für die erfindungsgemäßen verleimten Brettschichtholzträger bilden.The shavings of the top and middle layers of the chipboard consist for example of two thirds of oak wood and one third of softwood, preferably spruce or fir. The chip thickness is between 0.3 and 0.6 mm. The proportion of fine dust in the middle class should be less than 10%. A melamine-urea-phenol-formaldehyde resin is preferably used as the glue, as described, for example, in DE-C-20 20 481 or DE-C-29 51 957. The solid resin dosage, based on absolutely dry chips, should be 13.0 to 15.0% by weight for the top layer and 11.0 to 13.0% by weight for the middle layer. The Solid wax dosage based on absolutely dry chips should be 0.8 to 1.0% by weight for the top layer and 0.6 to 0.8% by weight for the middle layer. The hardener used is preferably a dicarboxylic acid mixture (for example type 15 hardener in scale form from BASF Aktiengesellschaft) or a formaldehyde-binding hardener according to DE-A-34 00 669. In the poured chip cake, the chips should have a moisture content of approximately 9 to 11% by weight of the middle layer and 12 to 15% by weight in the cover layer. The hydraulic press should allow a specific pressing pressure of 3.0 to 4.0 N / mm 2 so that the press can be run on spacer bars within 10 to 15% of the total pressing time despite the high density of the plates. Under these conditions, chipboard can be produced which corresponds to the characteristics mentioned at the outset and, as high-strength chipboard, is a requirement for the glued glulam beams according to the invention.

Zur Herstellung eines erfindungsgemäßen Brettschichtholzträgers, der beispielsweise einen Querschnitt von 50 « 15,4 cm aufweist, geht man z.B. folgendermaßen vor: Es werden Spanplatten der beschriebenen hochfesten Qualität mit einer Dicke von 22 mm in Streifen von 38 cm Breite geschnitten. Sieben Stück dieser Spanplattenstreifen beliebiger Länge werden mit einem zugelassenen Holz-Leimbau-Leim, vorzugsweise einem Melamin-HarnstoffPhenoi-Formaidehyd-Harz gemäß DE-A-20 43 440 im Kaltverfahren oder mit HochfrequenzBeheizung flach aufeinander geleimt. Der Block aus verleimten Platten wird auf eine Breite von 36,8 cm parallel besäumt. Falls keine Präzisionssäge vorhanden ist, empfiehlt sich ein Kalibrieren mit einer Breitbandschleifmaschine. Anschließend wird der Block hochkant stehend zwischen je 3 Fichtenbrettern von 22 mm Dicke mit den vorgenannten Leimen verleimt. Man erhält auf diese Weise einen Träger von 50 cm Höhe, der durch den Ersatz von 16 bis 17 Brettlagen zu 22 mm durch die hochfesten Spanplatten wesentlich billiger in der Herstellung ist.For producing a laminated timber carrier of the invention, for example, has a cross-section of 50 "15.4 cm, one goes, for example, as follows: There are chipboard described high-strength quality having a thickness of 22 mm into strips of 38 cm width cut. Seven pieces of these chipboard strips of any length are glued flat to one another with an approved wood-glue construction glue, preferably a melamine-urea-phenoi-formaidehyde resin according to DE-A-20 43 440 using the cold process or with high-frequency heating. The block of glued panels is trimmed parallel to a width of 36.8 cm. If there is no precision saw, calibration with a wide belt sander is recommended. The block is then glued upright between 3 spruce boards each 22 mm thick with the aforementioned glues. In this way, a support of 50 cm in height is obtained, which is much cheaper to manufacture due to the replacement of 16 to 17 board layers of 22 mm by the high-strength chipboard.

Die Erfindung wird nachstehend anhand eines Beispiels und entsprechender Vergleichsdaten näher erläutert.The invention is explained in more detail below using an example and corresponding comparison data.

Beispielexample

Im Labormaßstab wurden folgende Versuche unternommen:

  • Ein Träger aus 5 Lagen astfreier Fichtenholzbretter von 22 mm Dicke wurde im Kaltverfahren mit Kau- ramin@-Leim 545 flüssig (gemäß DE-A-20 43 440) verleimt. Die Abmessung des Trägers nach dem Aushobein betrug 550 x 107 x 64 mm.
The following experiments were carried out on a laboratory scale:
  • A carrier made of 5 layers of knot-free spruce wood boards with a thickness of 22 mm was glued in a cold process with curamin @ glue 545 liquid (according to DE-A-20 43 440). The dimension of the carrier after the excavation leg was 550 x 107 x 64 mm.

Erfindungsgemäß wurden je vier Träger gleicher Abmessung hergestellt, bei denen nur die beiden äußeren Lagen aus Fichtenbrettern bestanden, die mittleren drei Lagen jedoch aus den zuvor genannten hochfesten Spanplatten gebildet waren. In einem Fall waren die drei verleimten Platten hochkant stehend angeordnet. Im anderen Falle waren die drei hochfesten Spanplatten flachliegend angeordnet. Die Dicke der Spanplatten betrug jeweils 22 mm. Die Verleimungsbedingungen waren identisch mit denen des Trägers aus 5 Lagen massiven Fichtenbrettern. Ein Vergleich der physikalischen Eigenschaften der so hergestellten Brettschichtholzträger ergab die folgenden Resultate:

Figure imgb0001
According to the invention, four supports of the same dimensions were produced, in which only the two outer layers consisted of spruce boards, but the middle three layers were formed from the aforementioned high-strength chipboard. In one case, the three glued panels were arranged upright. In the other case, the three high-strength particle boards were arranged flat. The thickness of the chipboard was 22 mm. The gluing conditions were identical to those of the carrier made of 5 layers of solid spruce boards. A comparison of the physical properties of the glulam beams produced in this way gave the following results:
Figure imgb0001

Wurden die mittleren 3 Fichtenbretter durch flach liegende Spanplatten ersetzt, so ergab sich ein leichter Abfall der Festigkeiten gegenüber dem reinen Fichtenholzträger. Dagegen wiesen die Träger mit den hochkant stehenden Spanplatten deutlich höhere Festigkeiten auf.If the middle 3 spruce boards were replaced by flat chipboard, there was a slight decrease in strength compared to the pure spruce beam. In contrast, the beams with the upright chipboard had significantly higher strengths.

Claims (6)

1. Verleimter Brettschichtholzträger mit außenliegenden Deckbrettem aus Massivholz, dadurch gekennzeichnet, daß in den mittleren Lagen anstelle von Massivholzbrettem miteinander verleimte Spanplattenstreifen von hochfester Qualität angeordnet sind.1. Glued glulam beam with external deck boards made of solid wood, characterized in that chipboard strips of high-strength quality are arranged in the middle layers instead of solid wood boards. 2. Verleimter Brettschichtholzträger nach Anspruch 1, dadurch gekennzeichnet, daß die Spanplattenstreifen bezüglich der Deckbretter aus Massivholz hochkant stehen.2. Glued glulam beam according to claim 1, characterized in that the chipboard strips are upright with respect to the cover boards made of solid wood. 3. Verleimter Bettschichtholzträger nach Anspruch 1 oder 2, dadurch aekennzeichnet, daß die Spanplattenstreifen gerichtete lange Späne aufweisen.3. Glued bed plywood support according to claim 1 or 2, characterized in that the chipboard strips have directed long chips. 4. Verfahren zur Herstellung des verleimten Brettschichtholzträger nach einem der Ansprüche 1 bis 2, dadurch gekennzeichnet, daß man Spanplattenstreifen im Kaltverfahren oder mit Hochfrequenzbeheizung flach aufeinanderleimt, den Block aus verleimten Spanplattenstreifen parallel besäumt und zwischen äußeren Deckbrettern aus Massivholz verleimt.4. A process for the production of the glued glulam beam according to one of claims 1 to 2, characterized in that chipboard strips are glued flat to one another in the cold process or with high-frequency heating, the block of glued chipboard strips are trimmed in parallel and glued between outer cover boards made of solid wood. 5. Verleimter Brettschichtholzträger, gegebenenfalls mit einem außenliegenden Deckbrett aus Massivholz, auf der auf Zug beanspruchten Seite des Trägers, dadurch gekennzeichnet, daß der Brettschichtholzträger miteinander verleimte Spanplattenstreifen von hochfester Qualität aufweist.5. Glued glulam beam, optionally with an outer cover board made of solid wood, on the side of the beam that is under tension, characterized in that the glulam beam has glued chipboard strips of high-strength quality. 6. Verleimter Brettschichtholzträger mit einem auf der zugbeanspruchten Seite des Trägers aufgebrachten Deckelement, dadurch gekennzeichnet, daß der Brettschichtholzträger miteinander verleimte Spanplattenstreifen von hochfester Qualität aufweist und daß als Deckelement 1 bis 4 Lagen Bretter, Sperrholz oder anderes flächiges Holzmaterial eingesetzt werden.6. Glued glulam beam with a cover element applied to the tensile side of the beam, characterized in that the glulam beam has glued chipboard strips of high-strength quality and that 1 to 4 layers of boards, plywood or other flat wood material are used as the cover element.
EP86106636A 1985-05-23 1986-05-15 Laminated wood beam and method for producing the same Withdrawn EP0202612A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853518483 DE3518483A1 (en) 1985-05-23 1985-05-23 GLUE-BASED Plywood BEAM AND METHOD FOR THE PRODUCTION THEREOF
DE3518483 1985-05-23

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EP0202612A2 true EP0202612A2 (en) 1986-11-26
EP0202612A3 EP0202612A3 (en) 1987-09-02

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2764622A1 (en) * 1997-06-17 1998-12-18 Paul Henri Mathis Vegetable fibre base composite beam used in constructions, especially of support structures
EP0939177A2 (en) 1998-02-26 1999-09-01 Kaufmann Holz AG Beam-like sleeper for wooden building element
EP1199140A2 (en) * 2000-10-20 2002-04-24 Finarco S.A. Wood composite beam and method of manufacture
CN102189573A (en) * 2011-03-29 2011-09-21 浙江莫霞实业有限公司 Deformation-preventing solid wood board

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Publication number Priority date Publication date Assignee Title
FR1423278A (en) * 1965-01-29 1966-01-03 Wooden beam
DE1930414A1 (en) * 1969-06-14 1970-12-17 Erhard Meier Nail ties
DE1609898B1 (en) * 1965-08-18 1971-03-25 Wiesner Erich Dr Techn Dipl In Joint training for wooden hall beams or the like from glued lamellas
US4195462A (en) * 1975-03-14 1980-04-01 Wood I Systems, Inc. Fabricated wood structural member
EP0096121A1 (en) * 1982-06-04 1983-12-21 Board Of Control Of Michigan Technological University Elongate structural members comprised of composite wood material
CH644176A5 (en) * 1979-08-03 1984-07-13 Anton Heggenstaller Multilayer beam with an extruded central layer consisting of fragments of vegetable matter

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1423278A (en) * 1965-01-29 1966-01-03 Wooden beam
DE1609898B1 (en) * 1965-08-18 1971-03-25 Wiesner Erich Dr Techn Dipl In Joint training for wooden hall beams or the like from glued lamellas
DE1930414A1 (en) * 1969-06-14 1970-12-17 Erhard Meier Nail ties
US4195462A (en) * 1975-03-14 1980-04-01 Wood I Systems, Inc. Fabricated wood structural member
CH644176A5 (en) * 1979-08-03 1984-07-13 Anton Heggenstaller Multilayer beam with an extruded central layer consisting of fragments of vegetable matter
EP0096121A1 (en) * 1982-06-04 1983-12-21 Board Of Control Of Michigan Technological University Elongate structural members comprised of composite wood material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2764622A1 (en) * 1997-06-17 1998-12-18 Paul Henri Mathis Vegetable fibre base composite beam used in constructions, especially of support structures
EP0939177A2 (en) 1998-02-26 1999-09-01 Kaufmann Holz AG Beam-like sleeper for wooden building element
EP1199140A2 (en) * 2000-10-20 2002-04-24 Finarco S.A. Wood composite beam and method of manufacture
EP1199140A3 (en) * 2000-10-20 2004-10-06 Finarco S.A. Wood composite beam and method of manufacture
CN102189573A (en) * 2011-03-29 2011-09-21 浙江莫霞实业有限公司 Deformation-preventing solid wood board

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DE3518483A1 (en) 1986-11-27

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