EP0444393A2 - Frame profile for fireproof closing - Google Patents

Frame profile for fireproof closing Download PDF

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Publication number
EP0444393A2
EP0444393A2 EP90890352A EP90890352A EP0444393A2 EP 0444393 A2 EP0444393 A2 EP 0444393A2 EP 90890352 A EP90890352 A EP 90890352A EP 90890352 A EP90890352 A EP 90890352A EP 0444393 A2 EP0444393 A2 EP 0444393A2
Authority
EP
European Patent Office
Prior art keywords
profile
fire protection
chambers
frame profile
hollow core
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Withdrawn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
EP90890352A
Other languages
German (de)
French (fr)
Other versions
EP0444393A3 (en
Inventor
Johann Maier
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.)
Alu-Konig Stahl Aluminium- Stahl- und Kunststoff-Systeme Vertriebsgesellschaft Mbh
Original Assignee
Alu-Konig Stahl Aluminium- Stahl- und Kunststoff-Systeme Vertriebsgesellschaft Mbh
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 Alu-Konig Stahl Aluminium- Stahl- und Kunststoff-Systeme Vertriebsgesellschaft Mbh filed Critical Alu-Konig Stahl Aluminium- Stahl- und Kunststoff-Systeme Vertriebsgesellschaft Mbh
Publication of EP0444393A2 publication Critical patent/EP0444393A2/en
Publication of EP0444393A3 publication Critical patent/EP0444393A3/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
    • E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
    • E06B5/161—Profile members therefor
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
    • E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
    • E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
    • E06B5/162—Fireproof doors having windows or other openings, e.g. for permitting ventilation or escape
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
    • E06B3/70—Door leaves
    • E06B2003/7059—Specific frame characteristics
    • E06B2003/7074—Metal frames
    • E06B2003/7078—Metal frames with fire retardant measures in frame

Definitions

  • the invention relates to a Rohmenprofil for fire protection closures, such as doors, windows, glass or panel walls, in which chambers are arranged on both sides of a hollow core profile, in which fire protection panels are inserted.
  • U profiles are fastened to the core profile, specifically with their web connecting the legs, so that the U profile is too open to the outside.
  • Fire protection panels are inserted into this U-profile and the U-profile is completed by an opposite U-profile.
  • Such designs have the disadvantage that when higher temperatures occur, the outer U-profile jumps off and the fire protection plates can fall out of the protection zone, as a result of which the core profile, that is to say the load-bearing profile, is exposed to the high temperatures, so that the frame profile loses its load-bearing capacity.
  • one of the two chambers is formed in one piece with the core profile, the chamber on the other side being connected to the fire protection plates via a hook connection to the core profile.
  • the invention has for its object to provide a frame profile of the type mentioned, which is easy to use and yet stable against high heat.
  • this object is achieved in that both outer chambers are integrally formed with the hollow core profile. On the one hand, this creates a secure connection between the core profile and the outer chambers, and on the other hand an easy-to-cut profile is achieved, since all essential parts are cut to length and mitred at the same time.
  • the outer chambers in their area facing the hollow core can be provided with abutment surfaces for holding the fire protection plate in contact with the outer chamber wall. This ensures that the fire protection panels are always kept in an optimal position for heat insulation.
  • the stop surfaces can be formed by steps and / or lugs.
  • the gradations are parts of the profile and the lugs are additionally molded parts.
  • the core profiles of a door frame or of a door leaf are designated by 1 or 2.
  • Outer chambers 3, 4 and 5, 6 are integrally formed on the core profiles 1 and 2, the boundaries of the chamber 4 and 6 containing holders 7, 8 for the stop seals of glass panes 9, 10.
  • the glass panes 9, 10 are in the present case connected to the profile via angles 11, 12, which angles are screwed onto the core profile.
  • On the chambers 3, 5 hook connections 13, 14 are provided, with which glass retaining strips or cover strips 33, 34 are suspended, which in turn have brackets 15 and 16, in which window sealing seals are inserted.
  • Fire protection plates 17, 18, 19, 20 are inserted into the chambers 3, 4 and 5, 6, respectively, which are supported on steps 21, 22, 23, 24, 25, 26 and on lugs 27 and 28.
  • Such profiles or built-up fire protection doors or windows or walls are suitable for all types of fire protection doors, since on the one hand they can achieve high fire resistance and on the other hand they can achieve smoke tightness due to the fire protection laminates 31 and 32 used.
  • the glass bracket 11, 12 may be omitted, if the hook connections 13, 14 and the glass seals in the brackets 15, 16 achieve such a good hold that the glass panes 9, 10 or the corresponding panels are securely in place are kept in their position.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Securing Of Glass Panes Or The Like (AREA)
  • Special Wing (AREA)

Abstract

The invention relates to a frame profile for fireproof closings, such as doors, windows, glass or panelled walls, in which chambers are arranged on both sides of a hollow core profile, into which fireproof sheets are laid, whereby both outer chambers (3, 4: 5,6) are moulded in a single piece with the hollow core profile (1, 2).

Description

Die Erfindung bezieht sich auf ein Rohmenprofil für Brandschutzabschlüsse, wie Türen, Fenster, Glas- oder Paneelwände, bei welchem an einem hohlen Kernprofil beidseits Kammern angeordnet sind, in welche Brandschutzplatten eingelegt sind.The invention relates to a Rohmenprofil for fire protection closures, such as doors, windows, glass or panel walls, in which chambers are arranged on both sides of a hollow core profile, in which fire protection panels are inserted.

Bei bekannten Ausbildungen dieser Art sind an dem Kernprofil U-Profile befestigt, und zwar mit ihrem die Schenkel verbindenden Steg, so daß das U-Profil nach außen zu offen ist. In dieses U-Profil werden Brandschutzplatten eingelegt, und das U-Profil durch ein entgegengesetzt gerichtetes U-Profil abgeschlossen. Derartige Ausbildungen haben den Nachteil, daß bei Auftreten höherer Temperaturen das äußere U-Profil abspringt und damit die Brandschutzplatten aus der Schutzzone herausfallen können, wodurch das Kernprofil, also das tragende Profil, den hohen Temperaturen ausgesetzt ist, so daß das Rahmenprofil seine Tragkraft verliert.In known designs of this type, U profiles are fastened to the core profile, specifically with their web connecting the legs, so that the U profile is too open to the outside. Fire protection panels are inserted into this U-profile and the U-profile is completed by an opposite U-profile. Such designs have the disadvantage that when higher temperatures occur, the outer U-profile jumps off and the fire protection plates can fall out of the protection zone, as a result of which the core profile, that is to say the load-bearing profile, is exposed to the high temperatures, so that the frame profile loses its load-bearing capacity.

Bei einer anderen bekannten Ausbildung ist eine der beiden Kammern mit dem Kernprofil einstückig geformt, wobei die auf der anderen Seite befindliche Kammer mit den Brandschutzplatten über eine Hakenverbindung mit dem Kernprofil verbunden ist. Diese Ausbildung vermeidet zwar den Nachteil, daß die Abdeckung und Halterung der Brandschutzplatten bei höheren Temperaturen abspringen und damit der Kern freigelegt wird, jedoch hat diese Ausbildung den Nachteil, daß die Hakenverbindung besondere Sicherungsorgane benötigt, um nicht bei höheren Temperaturen abzuspringen. Auch in diesem Falle würde nämlich dann der Kern schutzlos den hohen Temperaturen ausgesetzt sein. Ein weiterer Nachteil ist die relativ komplizierte Verarbeitung und Zurichtung der einzelnen Teile des Rahmenprofils.In another known embodiment, one of the two chambers is formed in one piece with the core profile, the chamber on the other side being connected to the fire protection plates via a hook connection to the core profile. Although this design avoids the disadvantage that the cover and bracket of the fire protection panels come off at higher temperatures and thus the core is exposed, this design has the disadvantage that the hook connection requires special safety devices so that it does not jump off at higher temperatures. In this case too, the core would then be exposed to the high temperatures without protection. Another disadvantage is the relatively complicated processing and preparation of the individual parts of the frame profile.

Der Erfindung liegt die Aufgabe zugrunde, ein Rahmenprofil der eingangs genannten Art zu schaffen, welches einfach zu handhaben und doch gegen hohe Hitzeeinwirkung stabil ist.The invention has for its object to provide a frame profile of the type mentioned, which is easy to use and yet stable against high heat.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß beide äußeren Kammern mit dem hohlen Kernprofil einstückig geformt sind. Dadurch wird einerseits eine sichere Verbindung zwischen dem Kernprofil und den äußeren Kammern geschaffen, und andererseits ein einfach zuzuschneidendes Profil erzielt, da alle wesentlichen Teile gleichzeitig abgelängt und auf Gehrung geschnitten werden.According to the invention this object is achieved in that both outer chambers are integrally formed with the hollow core profile. On the one hand, this creates a secure connection between the core profile and the outer chambers, and on the other hand an easy-to-cut profile is achieved, since all essential parts are cut to length and mitred at the same time.

Vorteilhafterweise können die äußeren Kammern in ihrem dem hohlen Kern zugewandten Bereich Anschlagflächen zum Halten der Brandschutzplatte in Anlage an die äußere Kammerwandung vorgesehen sein. Dadurch wird erzielt, daß die Brandschutzplatten immer in optimaler Lage zur Hitzeabdämmung gehalten werden. Dabei können die Anschlagflächen durch Abstufungen und/oder Nasen gebildet sein. Die Abstufungen sind dabei Teile des Profils und die Nasen zusätzlich angeformte Teile.Advantageously, the outer chambers in their area facing the hollow core can be provided with abutment surfaces for holding the fire protection plate in contact with the outer chamber wall. This ensures that the fire protection panels are always kept in an optimal position for heat insulation. The stop surfaces can be formed by steps and / or lugs. The gradations are parts of the profile and the lugs are additionally molded parts.

In der Zeichnung ist ein Ausführungsbeispiel des Erfindungsgegenstandes dargestellt.In the drawing, an embodiment of the subject of the invention is shown.

Mit 1 bzw. 2 sind die Kernprofile eines Türrahmens bzw. eines Türflügels bezeichnet. An die Kernprofile 1 bzw. 2 sind äußere Kammern 3, 4 bzw. 5, 6 einstückig angeformt, wobei die Begrenzungen der Kammer 4 und 6 Halterungen 7, 8 für die Anschlagdichtungen von Glasscheiben 9, 10 enthalten. Die Glasscheiben 9, 10 sind vorliegend über Winkel 11, 12 mit dem Profil verbunden, welche Winkel an dem Kernprofil angeschraubt sind. An den Kammern 3, 5 sind Hakenverbindungen 13, 14 vorgesehen, mit welchen Glashalteleisten bzw. Abdeckleisten 33, 34 eingehängt sind, die ihrerseits Halterungen 15 bzw. 16 aufweisen, in welche Fensterabschlußdichtungen eingelegt werden. In die Kammern 3, 4 bzw. 5, 6 sind Brandschutzplatten 17, 18, 19, 20 eingelegt, die sich an Abstufungen 21, 22, 23, 24, 25, 26 bzw. an Nasen 27 und 28 abstützen. Durch diese Abstufungen bzw. Nasen werden die Brandschutzplatten 17 an den dem Kernprofil 1 bzw. 2 abgewandten Wandungen der Kammern 3, 4 bzw. 5, 6 in Anlage gehalten. Im Bereich des Türfalzes sind die Türdichtungen 29, 30 sowie Brandschutzlaminate 31 und 32 vorgesehen, welch letztere bei erhöhter Temperatur aufquellen und so für einen rauchdichten Abschluß sorgen.The core profiles of a door frame or of a door leaf are designated by 1 or 2. Outer chambers 3, 4 and 5, 6 are integrally formed on the core profiles 1 and 2, the boundaries of the chamber 4 and 6 containing holders 7, 8 for the stop seals of glass panes 9, 10. The glass panes 9, 10 are in the present case connected to the profile via angles 11, 12, which angles are screwed onto the core profile. On the chambers 3, 5 hook connections 13, 14 are provided, with which glass retaining strips or cover strips 33, 34 are suspended, which in turn have brackets 15 and 16, in which window sealing seals are inserted. Fire protection plates 17, 18, 19, 20 are inserted into the chambers 3, 4 and 5, 6, respectively, which are supported on steps 21, 22, 23, 24, 25, 26 and on lugs 27 and 28. These steps or lugs keep the fire protection plates 17 in contact with the walls of the chambers 3, 4 and 5, 6 facing away from the core profile 1 or 2. The door seals 29, 30 and fire protection laminates 31 and 32 are in the area of the door rebate provided which the latter swell at elevated temperature and thus ensure a smoke-tight seal.

Derartige Profile bzw. aufgebaute Brandschutztüren bzw. -fenster oder -wände eignen sich für alle Typen von Brandschutztüren, da sie einerseits eine hohe Brandresistenz und andererseits aufgrund der eingesetzten Brandschutzlaminate 31 und 32 Rauchdichtheit erzielen können. Dabei können die Glashaltewinkel 11, 12 möglicherweise entfallen, und zwar dann, wenn durch die Hakenverbindungen 13, 14 und die Glasdichtungen in den Halterungen 15, 16 ein so guter Halt erzielt wird, daß die Glasscheiben 9, 10 bzw. die entsprechenden Paneele sicher in ihrer Lage gehalten sind.Such profiles or built-up fire protection doors or windows or walls are suitable for all types of fire protection doors, since on the one hand they can achieve high fire resistance and on the other hand they can achieve smoke tightness due to the fire protection laminates 31 and 32 used. The glass bracket 11, 12 may be omitted, if the hook connections 13, 14 and the glass seals in the brackets 15, 16 achieve such a good hold that the glass panes 9, 10 or the corresponding panels are securely in place are kept in their position.

Claims (3)

Rahmenprofil für Brandschutzabschlüsse, wie Türen, Fenster, Glas- oder Paneelwände, bei welchem an einem hohlen Kernprofil beidseits Kammern angeordnet sind, in welche Brandschutzplatten eingelegt sind, dadurch gekennzeichnet, daß beide äußeren Kammern (3, 4; 5, 6) mit dem hohlen Kernprofil (1, 2) einstückig geformt sind.Frame profile for fire protection closures, such as doors, windows, glass or panel walls, in which chambers are arranged on both sides of a hollow core profile, in which fire protection plates are inserted, characterized in that both outer chambers (3, 4; 5, 6) with the hollow Core profile (1, 2) are integrally formed. Rahmenprofil nach Anspruch 1, dadurch gekennzeichnet, daß in den äußeren Kammern (3, 4; 5, 6) in ihrem dem hohlen Kern ( 1, 2) zugewandten Bereich in bekannter Weise Anschlagflächen (21, 22, 23, 24, 25, 26, 27, 28) zum Halten der Brandschutzplatten (17, 18, 19, 20) in Anlage an die äußere Kammerwandung vorgesehen sind.Frame profile according to claim 1, characterized in that in the outer chambers (3, 4; 5, 6) in their area facing the hollow core (1, 2) in a known manner stop surfaces (21, 22, 23, 24, 25, 26 , 27, 28) are provided for holding the fire protection plates (17, 18, 19, 20) in contact with the outer chamber wall. Rahmenprofil nach Anspruch 2, dadurch gekennzeichnet, daß die Anschlagflächen durch an sich bekannte Abstufungen (21, 22, 23, 24, 25, 26) und/oder durch Nasen (27, 28) gebildet sind.Frame profile according to claim 2, characterized in that the stop surfaces are formed by steps (21, 22, 23, 24, 25, 26) known per se and / or by lugs (27, 28).
EP19900890352 1990-03-02 1990-12-28 Frame profile for fireproof closing Withdrawn EP0444393A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT50790A AT393291B (en) 1990-03-02 1990-03-02 FRAME PROFILE FOR FIRE PROTECTION LOCKS
AT507/90 1990-03-02

Publications (2)

Publication Number Publication Date
EP0444393A2 true EP0444393A2 (en) 1991-09-04
EP0444393A3 EP0444393A3 (en) 1992-04-08

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EP19900890352 Withdrawn EP0444393A3 (en) 1990-03-02 1990-12-28 Frame profile for fireproof closing

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EP (1) EP0444393A3 (en)
AT (1) AT393291B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2309728A (en) * 1996-02-01 1997-08-06 Lorient Polyprod Ltd Fire resistant frame member made from a heat meltable plastic having internal cavities selectively filled with an intumescent material.
WO2001007745A2 (en) 1999-07-21 2001-02-01 Dorma Gmbh + Co. Kg Fire door with a doorframe surrounding said door
WO2001007727A1 (en) 1999-07-21 2001-02-01 Dorma Gmbh + Co. Kg Fire wall
WO2001007744A1 (en) 1999-07-21 2001-02-01 Dorma Gmbh + Co. Kg Fire door or fire window
WO2001007746A1 (en) 1999-07-21 2001-02-01 Dorma Gmbh + Co. Kg Fire door or window
EP1120504A2 (en) * 2000-01-29 2001-08-01 Norsk Hydro Asa Fire resistant façade or glass roof with a supporting structure comprising vertical and horizontal profiles
EP1138864A1 (en) * 2000-03-31 2001-10-04 SCHÜCO International KG Compound section member for windows, facades, doors or glazed roof
WO2002084062A1 (en) * 2001-04-10 2002-10-24 Vkr Holding A/S Fire retarding window
DE102007008346A1 (en) * 2007-02-20 2008-08-21 Eduard Hueck Gmbh & Co. Kg Hollow section for e.g. fire protection window, has fire protection insert provided for extension of service life of hollow section in case of fire, and exhibiting layers that are made of different fire protection materials

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018126563A1 (en) * 2018-10-24 2020-04-30 Novoferm Riexinger Türenwerke GmbH Fire closure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8706051U1 (en) * 1986-12-12 1987-08-13 Alu König Stahl Aluminium-, Stahl- und Kunststoff-Systeme Vertriebsgesellschaft m.b.H., Wien Glazed and/or infilled fire doors
AT391522B (en) * 1985-05-23 1990-10-25 Degelsegger Walter Ing Windowframe and casing for glazed fire doors

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT391522B (en) * 1985-05-23 1990-10-25 Degelsegger Walter Ing Windowframe and casing for glazed fire doors
DE8706051U1 (en) * 1986-12-12 1987-08-13 Alu König Stahl Aluminium-, Stahl- und Kunststoff-Systeme Vertriebsgesellschaft m.b.H., Wien Glazed and/or infilled fire doors

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2309728A (en) * 1996-02-01 1997-08-06 Lorient Polyprod Ltd Fire resistant frame member made from a heat meltable plastic having internal cavities selectively filled with an intumescent material.
WO1997028344A1 (en) * 1996-02-01 1997-08-07 Lorient Polyproducts Limited Structural frame member
GB2309728B (en) * 1996-02-01 1999-09-08 Lorient Polyprod Ltd Structural frame member
AU726093B2 (en) * 1996-02-01 2000-11-02 Lorient Polyproducts Limited Structural frame member
LT4889B (en) 1999-07-21 2002-02-25 Dorma Gmbh + Co.Kg Fire door or fire window
US6668499B2 (en) 1999-07-21 2003-12-30 Dorma Gmbh + Co. Kg Fire door or window
WO2001007744A1 (en) 1999-07-21 2001-02-01 Dorma Gmbh + Co. Kg Fire door or fire window
WO2001007746A1 (en) 1999-07-21 2001-02-01 Dorma Gmbh + Co. Kg Fire door or window
US6981351B2 (en) 1999-07-21 2006-01-03 Dorma Gmbh + Co. Kg Fire rated door with a surrounding door frame
WO2001007727A1 (en) 1999-07-21 2001-02-01 Dorma Gmbh + Co. Kg Fire wall
WO2001007745A2 (en) 1999-07-21 2001-02-01 Dorma Gmbh + Co. Kg Fire door with a doorframe surrounding said door
US6421968B2 (en) 1999-07-21 2002-07-23 Dorma Gmbh + Co. Kg Fire wall
LT4937B (en) 1999-07-21 2002-07-25 Dorma Gmbh + Co.Kg Fire rated door with a surrounding door frame
BG64758B1 (en) * 1999-07-21 2006-02-28 Dorma Gmbh + Co.Kg Fire-protected door or fire-protected window `
BG64631B1 (en) * 1999-07-21 2005-09-30 Dorma Gmbh + Co.Kg Fire wall
LT4987B (en) 1999-07-21 2003-01-27 Dorma Gmbh + Co. Kg Fire door or window
US6606831B2 (en) 1999-07-21 2003-08-19 Dorma Gmbh + Co., Kg Fire rated door and fire rated window
EP1120504A2 (en) * 2000-01-29 2001-08-01 Norsk Hydro Asa Fire resistant façade or glass roof with a supporting structure comprising vertical and horizontal profiles
EP1120504A3 (en) * 2000-01-29 2002-12-18 Norsk Hydro Asa Fire resistant façade or glass roof with a supporting structure comprising vertical and horizontal profiles
EP1138864A1 (en) * 2000-03-31 2001-10-04 SCHÜCO International KG Compound section member for windows, facades, doors or glazed roof
WO2002084062A1 (en) * 2001-04-10 2002-10-24 Vkr Holding A/S Fire retarding window
DE102007008346A1 (en) * 2007-02-20 2008-08-21 Eduard Hueck Gmbh & Co. Kg Hollow section for e.g. fire protection window, has fire protection insert provided for extension of service life of hollow section in case of fire, and exhibiting layers that are made of different fire protection materials

Also Published As

Publication number Publication date
EP0444393A3 (en) 1992-04-08
ATA50790A (en) 1991-02-15
AT393291B (en) 1991-09-25

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