EP3839190A1 - Porte coupe-feu - Google Patents

Porte coupe-feu Download PDF

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Publication number
EP3839190A1
EP3839190A1 EP20213928.3A EP20213928A EP3839190A1 EP 3839190 A1 EP3839190 A1 EP 3839190A1 EP 20213928 A EP20213928 A EP 20213928A EP 3839190 A1 EP3839190 A1 EP 3839190A1
Authority
EP
European Patent Office
Prior art keywords
fire door
door
load
bearing structure
stiffening elements
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.)
Pending
Application number
EP20213928.3A
Other languages
German (de)
English (en)
Inventor
Mario Francescato
Mauro Zorzetto
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.)
Novoferm Schievano SRL
Original Assignee
Novoferm Schievano SRL
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 Novoferm Schievano SRL filed Critical Novoferm Schievano SRL
Publication of EP3839190A1 publication Critical patent/EP3839190A1/fr
Pending 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
    • E06B3/04—Wing frames not characterised by the manner of movement
    • E06B3/263—Frames with special provision for insulation
    • 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
    • E06B3/82—Flush doors, i.e. with completely flat surface
    • E06B3/827—Flush doors, i.e. with completely flat surface of metal without an internal frame, e.g. with exterior panels substantially of metal
    • 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
    • E06B2003/7042—Door leaves characterised by the filling between two external panels with a fire retardant layer
    • 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 present invention relates to a fire door.
  • a fire door is used as passive protection in case of fire, and therefore with safety functions for buildings.
  • the function thereof is to separate two rooms, one of which is subject to fire, by withstanding for a given time and at the same time ensuring there is no passage of flame and there is a limitation of the temperatures on the side not exposed to the fire.
  • a fire door is designed to withstand a very high source of heat for a certain length of time.
  • the deformation results in less contiguity between jamb and door, opening gaps which let the flame pass, and therefore reduce the duration of the door.
  • the duration of the fire integrity of a door is determined by two factors: the thermal insulation and the deformation.
  • the scale of the deformation is directly proportionate to the thermal gradient between the two faces; therefore, the more performing the insulation, the more important it is to control the deformation.
  • a fire door 1 consists of the coupling of a first punched and folded plate 2 made of metal sheet (generally galvanized steel), which forms the base of the door, and of a second punched and folded sheet plate 3, which forms the bottom of the door.
  • the two plates 2 and 3 are coupled around the perimeter so as to define a closed box-like structure which defines a cavity 4 in the door.
  • the fire door 1 is connected to a perimeter frame 5 by means of hinges 6.
  • Door 1 in turn is mounted at an opening made on a wall 8.
  • Door 1 further comprises at least one lock 7 and possible blocking sweeps to close the door.
  • the hinges, the lock and the possible sweeps are connection points with frame 5 and accordingly oppose the deformation due to the thermal expansion.
  • fire door with a standard structure a fire door having an exoskeleton consisting of the coupling of two metal sheet plates defining a cavity therebetween, filled with one or more thermal insulation materials.
  • Certain technical solutions provide inserting plasterboards to replace the fire-retardant material in the door cavity, at least in certain portions of the door itself.
  • Such an inner frame is fixed to the load-bearing structure of the door by means of mechanical connection elements such as, for example bolts or screws.
  • the present invention relates to a fire door.
  • the fire door 1 comprises a load-bearing structure 10, which is defined by two metal sheets 2 and 3, which are folded and coupled together around the perimeter, so as to delimit a closed cavity 4 therebetween and inside the load-bearing structure itself.
  • the load-bearing structure 10 has the shape of a panel.
  • the aforesaid two metal sheets 2, 3 defining the two opposite faces of the fire door 1 are an inner face and an outer face, respectively.
  • the perimeter sides of the panel defined by the load-bearing structure 10 define the four perimeter sides of the door itself, of which, two vertical sides 10a and 10b and two horizontal sides 10c and 10d (upper and lower, respectively), which connect the two vertical sides to each other.
  • the fire door 1 comprises:
  • lock 7 which is at least partially accommodated in cavity 4, is protected by at least two plasterboards 70 arranged in the cavity itself between lock 7 and the two metal sheets 2 and 3.
  • the fire door 1 further comprises fire-retardant thermal insulation material 9, which is arranged as filler inside the closed cavity 4.
  • thermal insulation material means a material marked by low thermal conductivity.
  • Fire-retardant material generically means a non-flammable material or a material having features by virtue of which the combustion thereof is significantly reduced or is significantly delayed.
  • the fire-retardant thermal insulation material may consist of a single material (for example, mineral fiber, rock wool) or of the combination of two or more materials (for example, mineral fiber, silicates, foam glass).
  • the fire door 1 further comprises one or more stiffening elements 11, 12 arranged inside the aforesaid cavity 4 to counteract thermal deformations induced on the load-bearing structure 10 by a thermal gradient between the inner face and the outer face of door 1.
  • the aforesaid one or more stiffening elements 11, 12 consist of elongated bodies which each have a prevailing longitudinal direction of extension X1, X2 and are arranged along one or more perimeter sides 10b, 10c of the load-bearing structure 10.
  • the aforesaid one or more stiffening elements 11, 12 are arranged so as to have the prevailing longitudinal direction of extension X1, X2 parallel to a perimeter side 10b, 10c.
  • stiffening elements having a very limited volume are involved because they are intended to occupy a very limited portion of cavity 4.
  • the aforesaid one or more stiffening elements 11, 12 are made of austenitic or austenitic-ferritic stainless steel.
  • Austenitic and austenitic-ferritic stainless steel have an increased capacity of deformation and absorption of energy prior to breaking with respect to other types of steel such as, for example carbon steel or ferritic steel. Moreover, the mechanical properties in austenitic stainless steel and austenitic-ferritic stainless-steel decline in a less pronounced way at temperatures above 400 to 500°C.
  • the weight with respect to conventional reinforcements being equal, the aforesaid stiffening elements may be ensured to have superior mechanical properties, also at increased temperatures, and therefore a superior and more prolonged capacity of countering the deformations.
  • stiffening elements in steel of austenitic type or of austenitic-ferritic type allows reducing the amount of material used, and therefore the weight added to the door by the stiffening elements.
  • the whole stiffening element will have an almost uniform temperature in use, which results in a deformation due to the temperature, uniform in the whole element. This is to the benefit of a uniform behavior of the stiffening element.
  • the stainless steel is an austenitic stainless steel, in particular AISI304 or AISI316.
  • the aforesaid stiffening elements 11, 12 are arranged only at the areas most subjected to deformations if a thermal load is applied to the fire door 1 on one of the two faces. Therefore, the stiffening elements 11, 12 are located only in the areas in which the stiffening is most useful and effective. Thereby, the counteracting effect of the deformations is maximized, while at the same time minimizing the increase in weight of door 1 associated with the insertion of the stiffening elements 11, 12.
  • the critical points with the most deformation in a fire door with a standard structure are the upper side of the door and the upper part of the side on which there is the lock, i.e., the sides of the door with no coupling points to frame 5 (by means of hinges, locks and possible sweeps).
  • the photograph in Figure 3 shows the results of a failed test carried out on a fire door with a standard structure.
  • the critical points with the higher deformation are shown with L-shaped dashed lines and correspond to the upper horizontal side of the door and the upper part of the vertical side on which the lock is located.
  • the aforesaid one or more stiffening elements 11, 12 are therefore arranged along one or both the following perimeter sides of the load-bearing structure 10:
  • a fire door which, applied thermal stress being equal, is subjected to fewer deformations with respect to a fire door with a standard structure, may be made without however being significantly heavier.
  • the use of austenitic or austenitic-ferritic stainless steel allows the mechanical performance of the stiffening elements to be increased at high temperatures, thus allowing the amount of material required in such stiffening elements to be reduced, performance being equal.
  • the aforesaid stiffening elements 11 and 12 consist of elongated bodies arranged along one or more perimeter sides 10b, 10c of the load-bearing structure 10 and only in the critical deformation areas of the door, the counteracting action of the deformations in the areas of maximum deformation of the structure is concentrated, thus at the same time minimizing the extension, and therefore the weight added to the structure by the aforesaid stiffening elements 11 and 12.
  • the fire door 1 comprises only two stiffening elements 11, 12, of which a first element 11 is arranged along the second vertical perimeter side 10b and a second element 12 is arranged along the upper horizontal side 10c.
  • such two stiffening elements 11, 12 may extend in length up to reaching the corner of the door, defined by the intersection between the second vertical perimeter side 10b and the upper horizontal side 10c.
  • the two stiffening elements 11, 12 may be connected to each other and form a single body or they may be simply placed side-by-side without forming a single body.
  • such two stiffening elements 11, 12 might also not extend in length up to reaching the aforesaid corner.
  • the stiffening element 11 located along the second vertical perimeter side 10b may extend in a limited manner to the upper portion 10b' of such a side 10b, i.e., to the portion of the side which extends from lock 7 up to the upper side 10c.
  • the stiffening element 11 has an extension in length equivalent to at least 3/4 of the upper portion 10b' of the second vertical perimeter side 10b.
  • the stiffening element 11 located along the second vertical perimeter side 10b may also extend to the lower portion 10b" of such a side 10b, i.e., to the portion of the side which extends from lock 7 up to the lower side 10d. If door 1 is provided with plasterboards 70 to protect lock 7, the stiffening element 11 is divided into two sections separated by the protective plasterboards 70: an upper one and a lower one.
  • each of said one or more stiffening elements 11, 12 has an extension in length equivalent to at least 3/4 of the length of side 10b, 10c of the load-bearing structure along which it is arranged. It has been possible to experimentally verify that such a longitudinal extension is sufficient to allow the individual stiffening element to carry out the function thereof, i.e., of counteracting the deformations of the load-bearing structure 10. Therefore, there is no need for each stiffening element 11, 12 to extend for the whole length of the side of the load-bearing structure 10 along which it is located.
  • each of said one or more stiffening elements 11, 12 has a height H, measured transversely to the prevailing longitudinal direction of extension X1, X2 and orthogonally to the inner and outer faces of said door 1, which is equivalent to at least 80% of thickness S1 of the load-bearing structure 10, measured orthogonally to the inner and outer faces of said door 1. It has been possible to experimentally verify that such an extension in terms of height H is sufficient to allow the individual stiffening element to carry out the function thereof, i.e., of counteracting the deformations of the load-bearing structure 10. Therefore, there is no need for each stiffening element 11, 12 to extend for the whole thickness S1 of the load-bearing structure 10.
  • the aforesaid one or more stiffening elements 11, 12 are kept in position inside cavity 4 only by the fire-retardant thermal insulation material 9, and possibly also by shape coupling with the load-bearing structure 10.
  • stiffening elements 11, 12 there is no need for the stiffening elements 11, 12 to be mechanically fixed to the load-bearing structure 10 by means of anchoring elements, such as screws or bolts. This significantly simplifies the production process of the fire door 1. Indeed, the stiffening elements 11, 12 may be simply resting inside the cavity and kept in position by the fire-retardant thermal insulation material.
  • the aforesaid two metal sheets 2, 3 are made of carbon steel sheet, in particular cold forming steel, even more specifically galvanized steel.
  • the aforesaid one or more stiffening elements 11, 12 made of stainless steel may be externally covered by a layer of ceramic material.
  • the ceramic material allows the metal reinforcement to be thermally insulated for a longer period of time so as to preserve the mechanical properties of the stainless steel which are greater at lower temperatures, for a longer period of time.
  • the elongated bodies forming the aforesaid one or more stiffening elements 11, 12 may have different shapes and cross-sections.
  • each of said one or more stiffening elements 11, 12 may consist of a solid stainless-steel bar.
  • the aforesaid solid bar has a thickness S2, measured transversely to the prevailing longitudinal direction of extension X1, X2 of the bar itself and parallel to said inner and outer faces of said door 1, which is between 4 and 8 times the thickness of one of the two metal sheets 2, 3. It has been possible to experimentally verify that a stiffening element 11, 12 made from a solid bar of such a thickness S2 is capable of effectively counteracting the deformations of the metal sheet 2 or 3, which defines the face of the door exposed to the heat, thus minimizing the weight added to the door itself.
  • the elongated elements forming the aforesaid stiffening elements 11 and 12 may have a cross section having such a shape that, the weight being equal, the rigidity thereof is increased along the prevailing longitudinal direction of extension X1, X2 of the elongated element itself.
  • each of said one or more stiffening elements 11, 12 may be a profile consisting of metal sheet folded at least once on itself along one or more folding lines parallel to the prevailing longitudinal direction of extension X1, X2 of the elongated body defining said stiffening element 11, 12.
  • the folding lines define at least two parallel flat edges 13 of metal sheet on the profile, joined by a curved portion of metal sheet 14.
  • the aforesaid at least two flat edges 13 lie on planes orthogonal to the two inner and outer faces of said door 1.
  • the aforesaid profile (consisting of a metal sheet folded at least once on itself according to one or more folding lines parallel to the prevailing longitudinal direction of extension X1, X2) has a thickness S2, measured transversely to said prevailing longitudinal direction of extension X1, X2 and parallel to said inner and outer faces of said door 1, which is between 4 and 8 times the thickness of one of the two metal sheets (2, 3). It has been possible to experimentally verify that a stiffening element 11, 12 made from a profile having the aforesaid features and with such a thickness S2 is capable of effectively counteracting the deformations of the metal sheet 2 or 3 which defines the face of the door exposed to the heat, thus minimizing the weight added to the door itself.
  • each of said one or more stiffening elements 11, 12 may be a profile consisting of metal sheet partially folded along one or more folding lines parallel to the prevailing longitudinal direction of extension X1, X2 of the elongated body defining said stiffening element 11, 12. More in detail, the folding lines define a main flat edge 15 on the profile, which main flat edge lies on a plane orthogonal to said inner and outer faces of said door 1, and one or two flat flaps 16, each of which extends from the main flat edge 15 and lies on a plane parallel to the inner and outer faces of said door 1.
  • the aforesaid profile 11, 12 may have a "Z"-shaped cross-section ( Figure 7d ), a "C"-shaped cross-section ( Figure 7e ) or an "L"-shaped cross-section ( Figure 7f ).
  • the aforesaid profile has a width W, measured transversely to the respective prevailing longitudinal direction of extension X1, X2 and parallel to the inner and outer faces of said door 1, which is between 12 and 24 times the thickness of one of the two metal sheets 2, 3. It has been possible to experimentally verify that a stiffening element 11, 12 made from a profile having the aforesaid features and with such a width W is capable of effectively counteracting the deformations of the metal sheet 2 or 3 which defines the face of the door exposed to the heat, thus minimizing the weight added to the door itself.
  • each of said one or more stiffening elements 11, 12 may be a profile consisting of metal sheet folded along one or more folding lines parallel to the prevailing longitudinal direction of extension X1, X2 of the elongated body so as to form a closed polygonal figure.
  • a closed polygonal figure is quadrangular, even more preferably rectangular, so that two sides 17 of the profile may be arranged parallel to the faces of the door, and the other two sides 18 may be arranged orthogonally to the two faces of the door.
  • each of said one or more stiffening elements 11, 12 may directly consist of a stainless-steel tubular body having polygonal section, preferably quadrangular, even more preferably rectangular.
  • the aforesaid stiffening element (whether it is defined by a profile obtained by folding a metal sheet to form a closed polygonal figure, or it is defined by a tubular body) has a width W, measured transversely to the respective prevailing longitudinal direction of extension X1, X2 and parallel to the inner and outer faces of said door 1, which is between 12 and 24 times the thickness of one of the two metal sheets 2, 3. It has been possible to experimentally verify that a stiffening element 11, 12 thus made and with such a width W is capable of effectively counteracting the deformations of the metal sheet 2 or 3 which defines the face of the door exposed to the heat, thus minimizing the weight added to the door itself.
  • the invention allows several advantages to be obtained, some of which have already been pointed out previously.
  • the fire door 1 according to the invention is subjected to fewer deformations with respect to a fire door with a standard structure, without however being significantly heavier.
  • the stiffening elements 11, 12 are made of materials (austenitic or austenitic-ferritic stainless steel) having high performance (at high temperatures, in particular) and are located only in the areas in which the stiffening is more useful and effective.
  • the counteracting effect of the deformations is maximized, while at the same time minimizing the increase in weight of door 1 associated with the insertion of the stiffening elements 11, 12.
  • the maximization of the counteracting effect of the deformations is obtained also by virtue of the elongated shape of the stiffening elements arranged along the sides of the load-bearing structure most subjected to deformations.
  • the fire door 1 is simple and affordable to make by virtue of the fact that the stiffening elements are located only in limited portions of the load-bearing structure and the fact that the stiffening elements are preferably not mechanically fixed to the load-bearing structure, rather are kept in position by the fire-retardant thermal insulation material. This simplifies making the fire door, with benefits in terms of reducing the production costs.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Special Wing (AREA)
EP20213928.3A 2019-12-17 2020-12-14 Porte coupe-feu Pending EP3839190A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102019000024277A IT201900024277A1 (it) 2019-12-17 2019-12-17 Porta tagliafuoco

Publications (1)

Publication Number Publication Date
EP3839190A1 true EP3839190A1 (fr) 2021-06-23

Family

ID=70155094

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20213928.3A Pending EP3839190A1 (fr) 2019-12-17 2020-12-14 Porte coupe-feu

Country Status (2)

Country Link
EP (1) EP3839190A1 (fr)
IT (1) IT201900024277A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4888918A (en) * 1989-02-14 1989-12-26 Pease Industries, Inc. Fire-resistant door
DE19651699C1 (de) * 1996-12-12 1998-01-15 Theo Schroeders Feuerschutztür mit einem Versteifungsprofil

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4888918A (en) * 1989-02-14 1989-12-26 Pease Industries, Inc. Fire-resistant door
DE19651699C1 (de) * 1996-12-12 1998-01-15 Theo Schroeders Feuerschutztür mit einem Versteifungsprofil

Also Published As

Publication number Publication date
IT201900024277A1 (it) 2021-06-17

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