EP1514991A2 - Brandschutztür - Google Patents

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Publication number
EP1514991A2
EP1514991A2 EP04255497A EP04255497A EP1514991A2 EP 1514991 A2 EP1514991 A2 EP 1514991A2 EP 04255497 A EP04255497 A EP 04255497A EP 04255497 A EP04255497 A EP 04255497A EP 1514991 A2 EP1514991 A2 EP 1514991A2
Authority
EP
European Patent Office
Prior art keywords
fire door
core
door
brace
tubular
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Withdrawn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
EP04255497A
Other languages
English (en)
French (fr)
Other versions
EP1514991A3 (de
Inventor
Andrew Horsfall
Stuart Groves
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.)
Masonite Corp
Original Assignee
Masonite Corp
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 Masonite Corp filed Critical Masonite Corp
Publication of EP1514991A2 publication Critical patent/EP1514991A2/de
Publication of EP1514991A3 publication Critical patent/EP1514991A3/de
Withdrawn legal-status Critical Current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
    • 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
    • E06B3/7015—Door leaves characterised by the filling between two external panels
    • E06B2003/7025—Door leaves characterised by the filling between two external panels of cork; of wood or similar fibres
    • 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
    • E06B5/11—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 against burglary

Definitions

  • the present invention relates to a fire door, a core for such a door and a method of forming a fire door using the core.
  • Solid core entry doors are desirable for various reasons, including aesthetics, security, and ability to withstand fires.
  • a fire door rating indicates how long the door assembly can withstand heat.
  • Various tests have been designed for testing the ability of a door to resist fire.
  • a door may be evaluated according to tests specified in the British Standard BS 476, including a preliminary ignition test, a fire penetration test and a spread of flame test. In these tests, the door is exposed to intense heat, such as that generated by fire in a burning building. The door should maintain its integrity and resist fire for a specified period of time in order to comply with BS 476. A door is rated as a 30-minute fire door if it resists fire and maintains its integrity for 1 ⁇ 2 hour.
  • a fire door typically has a core, which itself must have good integrity during exposure to fire. That is, it must resist heat transfer, burning, melting, spalling, cracking, bowing or deteriorating such that the transfer of heat from the fire-exposed side of the door to the unexposed side is deterred, and the integrity of the unexposed side is maintained. Otherwise, ignition and possible spread of fire may result from premature charring or burning of the combustible veneer or door facing of the unexposed side on the door.
  • the core should remain relatively stable and resist warping or shrinking to the extent that it remains in contact with the stiles and rails around its perimeter. Separation from the banding may cause the combustible components to burn away prematurely, allowing fire to penetrate the opening.
  • a perimeter frame is provided having stiles along each side of the core, one rail along the intended upper edge of the door, and one rail along the intended bottom edge of the door. This configuration of the perimeter frame is often unacceptable for fire doors because the core tends to warp or shrink away from the frame. Due to heat transfer or thermal expansion, a door tends to expand toward the heat source.
  • a second set of rails is often required for fire doors to provide additional resistance to bowing or shrinkage caused by such thermal expansion.
  • the fire door therefore includes two rails along the intended bottom edge of the door, and two rails along the intended upper edge of the door.
  • the second set of rails must often be installed manually, which increases labor costs. As such, fire doors are often relatively expensive and complicated to manufacture.
  • a fire door comprises a perimeter frame and first and second door facings secured to opposing sides of the perimeter frame.
  • a core is positioned within the perimeter frame, and disposed between the first and second door facings.
  • the core has a first end, a second end, and at least one tubular opening.
  • At least one brace extends through the tubular opening proximate the first end.
  • a core component for a fire door comprises a first end, a second end, and at least one tubular opening. At least one brace extends through the tubular opening proximate the first end.
  • a method of forming a fire door is also disclosed.
  • a core is provided having a first end, a second end, and at least one tubular opening.
  • a brace is inserted into the tubular opening.
  • the resulting braced core is positioned within a perimeter frame.
  • First and second door facings are secured to opposing sides of the perimeter frame.
  • Core component 10 for a fire door is best shown in Figure 1.
  • Core component 10 includes a first end 12 and a second end 14.
  • Core component 10 may include opposing first and second major surfaces 16, 18 that are substantially flush.
  • core component 10 may include routed or depressed portions, which may correspond to contoured portions in a door facing when forming a paneled door.
  • First and second longitudinal side surfaces 20, 22, and first and second transverse side surfaces 24, 26, are disposed between first and second major surfaces 16, 18.
  • a plurality of tubular openings 28 extend through core component 10, extending from first longitudinal side surface 20 to second longitudinal side surface 22.
  • tubular openings 28 are parallel to each other, and parallel to transverse side surfaces 24, 26.
  • Tubular openings 28 may be equally spaced from each other.
  • Tubular openings 28 may all have diameters that are substantially equal, or they may have differing diameters.
  • core component 10 may include tubular openings 28 having three different diameters.
  • At least one brace 30 extends through a tubular opening 28 proximate first end 12.
  • a second brace 32 may extend through another tubular opening 28 proximate second end 14.
  • Braces 30, 32 may be polygonal, though other configurations may also be used.
  • Each brace 30, 32 includes opposing first and second ends 34, 36.
  • Braces 30, 32 may extend through a tubular opening 28 having a larger diameter than other tubular openings 28 in core component 10.
  • Tubular openings adjacent transverse side surfaces 24, 26 may have relatively small diameters compared to other tubular openings 28, and braces 30, 32 may extend through the first tubular opening proximate ends 12, 14 that have relatively large diameters, respectively.
  • Braces 30, 32 may be formed from wood, such as European whitewood or pine. Preferably, the wood used displays relatively uniform charring properties when exposed to heat, so that braces 30, 32 retain their integrity for a maximum period of time. Ash, another wood species, is less desirable due to its charring characteristics. Braces 30, 32 may also be formed from medium density fiberboard, hardboard, particleboard, or other composite materials. Braces 30, 32 should not be formed of plastic materials, which would tend to melt. Likewise, metal conducts heat, and therefore metal inserts are not suitable for bracing a fire door. Aside from braces 30, 32, other portions of core component 10 may be formed from a composite of extruded wood fiber particles and resin binder, such as urea formaldehyde resin binder.
  • Ends 34, 36 may be square, as best shown in Figures 2 and 3. Ends 34, 36 are preferably flush with longitudinal side surfaces 20, 22. Alternatively, ends 34, 36 may be slightly recessed from longitudinal side surfaces 20, 22.
  • opposing edges 38, 40 extend outwardly toward first and second major surfaces 16, 18. In this way, any knots that may be present in wood braces 30, 32 do not affect the structural integrity of braces 38, 40. If the faces F of braces 30, 32 were parallel to first and second major surfaces 16, 18, a smaller distance is provided across which heat must transfer. As best shown in Figure 3, the distance d1 between edges 38, 40 is greater than the distances d2 or d3 between opposing faces F. Thus, orienting edges 38, 40 outwardly toward first and second major surfaces 16, 18, so that faces F are not parallel to major surfaces 16, 18, increases the distance through which heat must transfer. In this way, core component 10 (and a door including core component 10) maintains its integrity for a relatively long period of time.
  • braces 30, 32 have a relatively snug fit within openings 28.
  • a brace 30 having a thickness measured from edge 38 to edge 40 (i.e. distance d1) of about 22 mm may be inserted into a corresponding tubular opening having a diameter of about 22 mm.
  • Wood braces 30, 32 should be inserted into a tubular opening 28 so that they do not rattle or shift within openings 28.
  • a fire door 50 having core component 10 is shown in Figure 4.
  • Core component 10 is positioned within a perimeter frame.
  • the perimeter frame comprises first and second stiles 52, 54, and first and second rails 56, 58.
  • First and second door facings 60, 62 are secured to opposing sides of the perimeter frame, so that core component 10 is disposed between facings 60, 62.
  • Braces 30, 32 preferably extend between, and are perpendicular to, stiles 52, 54, and parallel to rails 56, 58.
  • ends 34 of braces 30, 32 abut stile 54, and ends 36 abut stile 52.
  • Fire door 50 may have flush door facings 60, 62.
  • one or both of facings 60, 62 may include contoured portions, such as paneled doors, if desired by the consumer. If a contoured door is desired, a corresponding recessed portion may be formed or routed in core component 10.
  • one or both of facings 60, 62 may include a decorative layer secured to the exterior surface 64 of facings 60, 62. Hardwood lippings may be secured to exteriorly disposed edges of the perimeter frame for additional support.
  • Fire door 50 is relatively inexpensive to manufacture because a standard perimeter frame may be used around core 10.
  • Core component 10 may be formed from an extruded timber fiber particle tube board core, such as manufactured by Sauerland Spanplatte GmbH & Co.KG.
  • the tube board core may be either a single component. Alternatively, several components of tube board may be used, such as two pieces of relatively equal size.
  • brace 30 When manufacturing core component 10, brace 30 is inserted into a tubular opening 28 proximate first end 12, and brace 32 is inserted into another tubular opening 28 proximate second end 14. As noted above, braces 30, 32 should fit snugly within openings 28. In order to provide sufficient strength to door 50 for achieving a 30-minute fire rating, only one brace 30 proximate the top portion T of door 50 is required. However, there is no "top" when manufacturing core component 10. Hence, braces 30, 32 are provided in order to assure that there is a brace proximate what will be top portion T of door 50. Top portion T of door 50 tends to bow more than the lower portions of door 50 proximate rail 58 on exposure to heat. It has been found that a bottom brace (i.e. brace 32) is not needed, but for manufacturing convenience, we provide two braces 30, 32.
  • Core component 10 is positioned within a perimeter frame, and first and second door facings 60, 62 are secured to opposing sides of the perimeter frame.
  • Door facings 60, 62 may be formed from medium density fiberboard, hardboard, particleboard, plywood, or some other wood composite. However, facings 60, 62 should not be plastic or metal, given such materials are not suitable for fire doors, as noted above.
  • the resulting fire door 50 has a 30-minute fire rating pursuant to British Standard BS 476 testing. As such, door 50 maintains its integrity, and resists bowing and shrinking for at least 1 ⁇ 2 hour. Testing of door 50 has been done by Warrington Certification Limited (WCL) Certifire Scheme, pursuant to WCL's "Rules for Certification of Fire Protection Products", Issue 4, January 2002.
  • WCL Warrington Certification Limited
  • Fire door 50 is relatively inexpensive to manufacture, with a substantial cost savings compared to manufacturing costs for conventional similarly rated fire doors.
  • Brace 30 prevents early deflection of door 50 when exposed to heat, and negates the necessity of using two rails at the top of a door and two rails at the bottom of the door.
  • Stiles 52, 54 and rails 56, 58 of the perimeter frame of door 50 may be secured together using butt joints, which are less expensive than other joining methods.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Special Wing (AREA)
EP04255497A 2003-09-10 2004-09-10 Brandschutztür Withdrawn EP1514991A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0321237 2003-09-10
GB0321237A GB2405897A (en) 2003-09-10 2003-09-10 Fire door

Publications (2)

Publication Number Publication Date
EP1514991A2 true EP1514991A2 (de) 2005-03-16
EP1514991A3 EP1514991A3 (de) 2006-05-24

Family

ID=29226858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04255497A Withdrawn EP1514991A3 (de) 2003-09-10 2004-09-10 Brandschutztür

Country Status (2)

Country Link
EP (1) EP1514991A3 (de)
GB (1) GB2405897A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102587806A (zh) * 2012-03-23 2012-07-18 上海杰阳实业有限公司 一种防火防盗门的门框改良结构
CN102852438A (zh) * 2012-09-29 2013-01-02 四川兴事发门窗有限责任公司 门扇周边内嵌金属骨架的钢木质防火门扇
CN105041155A (zh) * 2015-06-09 2015-11-11 成都兴世伟门业有限公司 一种防盗门的生产工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1559581A1 (de) * 1965-06-24 1970-01-15 Otto Kreibaum Bauplatte
DE3509101A1 (de) * 1985-03-14 1986-09-25 Günter 2803 Weyhe Rohlfs Holzbauteil, insbesondere tuerfluegelrahmen
EP0411457A1 (de) * 1989-08-03 1991-02-06 Leo Wassner Türblatt
DE19717134A1 (de) * 1996-04-24 1997-10-30 Leo Wassner Türblatt sowie Verfahren zur Herstellung eines Türblattes
EP1190825A2 (de) * 2000-07-29 2002-03-27 Ernst Nickel Dünnwandiges, dreidimensional geformtes Halbzeug oder Fertigteil

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB461898A (en) * 1935-08-23 1937-02-23 Fernand Jouanneau Improvements in cellular boards or panels
GB562028A (en) * 1942-10-16 1944-06-15 Aerolectric Mouldings Ltd Improvements in or relating to structural units for use in building construction
GB618151A (en) * 1946-10-26 1949-02-17 Thomas Crawford Lochiiead Improvements in or relating to flush doors
GB1098681A (en) * 1966-01-31 1968-01-10 Revere Copper & Brass Inc Improvements in light weight panel
DE2426290B2 (de) * 1974-05-29 1976-09-09 Türblatt für Innen- und Außentüren Schmidt, Gerhard R., 5804 Herdecke Tuerblatt fuer innen- und aussentueren
SG52258A1 (en) * 1992-05-12 1998-09-28 Lee Hoong Improved door construction
US5543234A (en) * 1994-06-20 1996-08-06 Masonite Corporation Molded wood composites having non-blistering profile with uniform paintability and nesting
JP4293575B2 (ja) * 1999-04-26 2009-07-08 株式会社ノナカ 木製防火扉用芯材及びその製造方法並びにそれを用いた防火扉

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1559581A1 (de) * 1965-06-24 1970-01-15 Otto Kreibaum Bauplatte
DE3509101A1 (de) * 1985-03-14 1986-09-25 Günter 2803 Weyhe Rohlfs Holzbauteil, insbesondere tuerfluegelrahmen
EP0411457A1 (de) * 1989-08-03 1991-02-06 Leo Wassner Türblatt
DE19717134A1 (de) * 1996-04-24 1997-10-30 Leo Wassner Türblatt sowie Verfahren zur Herstellung eines Türblattes
EP1190825A2 (de) * 2000-07-29 2002-03-27 Ernst Nickel Dünnwandiges, dreidimensional geformtes Halbzeug oder Fertigteil

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102587806A (zh) * 2012-03-23 2012-07-18 上海杰阳实业有限公司 一种防火防盗门的门框改良结构
CN102587806B (zh) * 2012-03-23 2014-01-22 上海杰阳实业有限公司 一种防火防盗门的门框改良结构
CN102852438A (zh) * 2012-09-29 2013-01-02 四川兴事发门窗有限责任公司 门扇周边内嵌金属骨架的钢木质防火门扇
CN105041155A (zh) * 2015-06-09 2015-11-11 成都兴世伟门业有限公司 一种防盗门的生产工艺

Also Published As

Publication number Publication date
GB0321237D0 (en) 2003-10-08
EP1514991A3 (de) 2006-05-24
GB2405897A (en) 2005-03-16

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