EP2340339A1 - Plafond suspendu formant un ecran coupe-feu - Google Patents
Plafond suspendu formant un ecran coupe-feuInfo
- Publication number
- EP2340339A1 EP2340339A1 EP09781856A EP09781856A EP2340339A1 EP 2340339 A1 EP2340339 A1 EP 2340339A1 EP 09781856 A EP09781856 A EP 09781856A EP 09781856 A EP09781856 A EP 09781856A EP 2340339 A1 EP2340339 A1 EP 2340339A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal
- ceiling according
- keys
- core
- panels
- 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- Withdrawn
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/22—Connection of slabs, panels, sheets or the like to the supporting construction
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/04—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like
- E04B9/045—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation comprising slabs, panels, sheets or the like being laminated
Definitions
- the present invention relates to a suspended ceiling forming a fire screen.
- Suspended ceilings forming a firewall under a load-bearing structure of wood or metal of a floor or a frame of a roof have been known for a long time.
- Such suspended ceilings are made of fireproof panels, most often plasterboard, screwed on a metal or wooden frame, which is itself suspended load-bearing structure of the floor.
- To enhance the fire resistance of such a ceiling it is known to stack several fire resistant panels with staggered joints and / or to cover the upper surface and the framework for fixing a layer of mineral wool.
- the construction of such a suspended ceiling is still today a craft work. Its effectiveness as a fire screen and its mechanical stability are largely dependent on the experience and know-how of the craftsmen who build it.
- such a ceiling is easily damaged by depressions or overpressure inside the building, which are for example due to explosions, the triggering of fire extinguishing or smoke extraction.
- An object of the present invention is to provide a suspended ceiling forming a fireproof screen which can be fully assembled using standard prefabricated elements, while having a high mechanical stability and a high degree of fire.
- a suspended ceiling forming a fire screen comprises at least two panels suspended from a supporting structure using suspension means.
- Each of these two panels comprises an insulating core and non-combustible, the lower face and the upper face are each coated with a metal sheet provided with flanges partially covering the edges of the core.
- At least one of these songs of the core then comprises a connecting key made of a reinforced mineral material, which is bordered by the edges of the two metal sheets.
- the two panels are arranged to have two wrenches facing each other, thereby forming a lower connection groove below the wrenches and an upper connection groove above the wrenches.
- each of these two connecting grooves is arranged a metal connecting section, which is fixed, preferably with bolt-type screws, to at least one of the two connection keys and which covers the joint between the two keys of the connector. connection.
- the metal fitting section fixed in the upper connection groove then serves as a fastener for said suspension means.
- the panels and fittings parts can be prefabricated standard elements, which can be assembled on site without particular craftsmanship.
- the ceiling panels can be relatively large in size.
- a panel may for example have a surface greater than 2 m 2 (for example: 120x200 cm panel is perfectly possible), while having a high mechanical stability and a reasonable weight (for example of the order of 400 to 600 Wm 2 ).
- One of the two connecting keys is preferably wider than the other.
- the metal connecting profiles are then attached to the widest key, which increases the mechanical stability of the ceiling.
- the metal fitting section has a central section "U"
- the base is fixed with screws to at least one of the two keys and covers the seal between the two keys.
- the metal fitting section arranged in the upper connection groove advantageously has two outer lateral wings resting on the metal sheet.
- the suspension means comprise at least one fixing rod and at least one fixing plate.
- the latter is fixed by means of screws on the metal connecting profile in the upper connection groove and comprises at least one fixing point for the fixing rod.
- the metal fitting section arranged in the lower connection groove preferably has a section "U" with two inner wings serving as a support for a cover plate, which is screwed onto the metal fitting section.
- This cover plate is preferably a carbon steel plate coated with an alloy composed of aluminum and zinc, with an intumescent band fixed on the upper surface of the cover plate. It protects the screw heads attaching metal profile fitting to the fitting key against fire heat.
- the metal sheet serving as envelope to the core is advantageously a thin sheet (thickness of about 0.6 to 1.3 mm) of carbon steel, which is coated with an alloy composed mainly of aluminum and zinc.
- this alloy comprises between 53 and 57% of aluminum, 41 and 46% of zinc and 1 and 2% of silicon.
- a preferred alloy comprises 55% aluminum, 43.4% zinc and 1.6% silicon.
- the insulating core of a panel advantageously comprises a sandwich structure having: on the side of the underside, a non-load bearing panel fuel, cement-based or silico-calcareous, fiber-reinforced, having good resistance to bending and compression; and on the upper side side, a non-combustible thermal insulation layer, based on cellular glass, having low thermal conductivity and low density.
- the carrier panel and the thermal insulation layer are preferably assembled by bonding using an elastic adhesive.
- Such a panel provides not only excellent thermal insulation and high mechanical strength, but is also made of easily recyclable materials (steel and mineral materials).
- the sandwich structure of the core is preferably framed by framing members of a reinforced mineral material. These frame members, which form the edges of the core with the connecting keys, are advantageously glued to the edges of the sandwich structure with the aid of an elastic adhesive.
- the carrier panel and the framing members are advantageously products based on cement or silico-limestone, reinforced with fibers, having a good resistance to bending and compression.
- the metal sheets are advantageously bonded to the insulating core using an elastic adhesive.
- the elastic adhesive used for assembling the various elements of a panel is preferably an organic adhesive including a hydrated mineral filler.
- This glue has sufficient elasticity to compensate for the differential expansions of different materials of a panel under the effect of fire heat.
- the hydrated mineral filler slows the transfer of heat through the panel by slowly evaporating under the action of fire heat. Then, the organic binder chars, which also seems to slow down the heat transfer through the panel. It will also be appreciated that the bonding of the various elements of the panel improves its lift and its mechanical stability significantly.
- the frontal surfaces of the keys are preferably provided with an intumescent paint layer. This intumescent paint seals the joint between two keys when the suspended ceiling is exposed to a fire.
- Fig. 1 a cross section through a suspended ceiling according to the present invention.
- FIG. 1 shows a seal between two panels 10 and 10 'according to the present invention.
- a panel normally has a square or rectangular shape.
- Typical dimensions are for example: 60x60 cm, 80x80 cm, 90x90 cm, 120x120 cm, respectively 60x90 cm, 80x120 cm or 120x200 cm, with a preference for panels having large dimensions.
- FIG. 1 we see only a right end of the panel 10 and a left end of the panel 10 '.
- This core 12 comprises a sandwich structure having as a bottom layer, a non-combustible carrier panel 28 having a good flexural strength, and as the upper layer, a non-combustible thermal insulation layer 26, having low thermal conductivity and low density.
- the thermal insulation layer 26 is advantageously made up of alumino-silicate cellular glass plates, having a thermal conductivity of approximately 0.04 W / mK, a density of the order of 120 kg / m 3, a compressive strength of the order of 0.7 MN / m2 and a flexural strength of the order of 0.4 MN / m2.
- alumino-silicate cellular glass plates having a thermal conductivity of approximately 0.04 W / mK, a density of the order of 120 kg / m 3, a compressive strength of the order of 0.7 MN / m2 and a flexural strength of the order of 0.4 MN / m2.
- Such plates which are completely inorganic and are formed without binders, are for example sold by the company "PITTSBURGH CORNING EUROPE SA" under the designation "FOAMGLAS ® T4". To achieve a fire resistance of 120 minutes, plates 80 mm thick will normally be used.
- the noncombustible carrier panel 28 is advantageously a cement-based panel or silico-limestone, reinforced with fibers. It has for example a thickness of the order of 12 mm and a density of the order of 1000 kg / m3.
- This panel may be a poor thermal insulator (thermal conductivity of the order of 0.25 W / mK) but must be incombustible and have good resistance to bending and compression, that is to say a resistance to bending of the order of 6-12 MN / m2 and a compressive strength perpendicular to the surface of the plate of the order of 10-20 MN / m2.
- At least one of the edges of the core 12, 12 ' comprises a connecting key 30, 30' of a reinforced mineral material, which is bordered by the flanges 22 and 24 of the two metal sheets 18, 20, respectively the flanges 22 'and 24' of the two metal sheets 18 ', 20'.
- a connecting key 30, 30' of a reinforced mineral material, which is bordered by the flanges 22 and 24 of the two metal sheets 18, 20, respectively the flanges 22 'and 24' of the two metal sheets 18 ', 20'.
- each edge that is to be connected to another panel includes such a fitting key 30, 30 '.
- two opposite edges of the same panel have keys of different width. In FIG. 1, we see for example that the key 30 of the right edge of the panel 10 is wider than the key 30 'of the left edge of the panel 10'.
- the sandwich structure of the core 12, 12 ' is framed by frame members 32, 32' of a reinforced mineral material. These frame members 32, 32 'form the edges of the core 12, 12' with the connecting keys 30, 30 '. They are glued to the edges of the sandwich structure using an elastic adhesive. These frame members 32, 32 'are preferably fiber-reinforced cementitious or sand-lime-based elements, as is the support panel 28.
- the panel 10 is for example assembled as follows.
- the cellular glass plate 26 is glued on the carrier panel 28.
- the frame members 32, 32 ' which form the edges of the core 12, 12' with the connecting keys 30, 30 'are glued on the four
- the metal sheets 18, 20 are bonded to the upper or lower surface of the core 12.
- the flanges 22, 24 of the metal sheets 18, 20 contribute to maintaining the elements of the core.
- a second flange 34, 36 at least partially covers the lower surface, respectively upper part of the connection key 30 and thus contributes to further stabilizing the connection key 30.
- an adhesive composed of an organic elastic binder, for example a resin of the family of polyols containing usual amounts of plasticizers, adhesion promoters, stabilizers, catalysts, to which is added a hydrated inorganic filler, for example trihydrated alumina, and a polymerization reagent.
- an organic elastic binder for example a resin of the family of polyols containing usual amounts of plasticizers, adhesion promoters, stabilizers, catalysts, to which is added a hydrated inorganic filler, for example trihydrated alumina, and a polymerization reagent.
- the organic binder must provide sufficient elasticity to compensate or absorb the deformations of a slab 10, 10 'when it is loaded in normal use. and, in the event of a fire, to compensate as much as possible for the differential expansions of the different materials of a slab 10, 10 'under the effect of the fire heat. Hydrated mineral filler slows thermal transfer by evaporating slowly under the action of fire heat. Then,
- the metal sheets 18, 20 forming the facing of the panels 10, 10 ' are preferably thin sheets (0.6 to 1, 3 mm thick) of carbon steel coated with an alloy composed of aluminum and zinc in substantially equal proportions and a trace of silicon.
- Such sheets are for example marketed by ArcelorMittal under the name ALUZINC ® sheets.
- the ALUZINC ® sheet coating alloy comprises approximately 55% aluminum, 43.4% zinc and 1.6% silicon.
- the well-known advantages of these sheets are their remarkable resistance to corrosion and the fact that the natural color and gloss of the coating are preserved for a long time.
- FIG. 1 it can be seen that the two panels 10, 10 'are arranged so as to have the two connection keys 30 and 30' facing each other, thus forming a lower connection groove below the connection keys 30 , 30 'and an upper connecting groove above the connecting wrenches 30, 30'.
- a metal connecting section 40, 42 In each of these two connecting grooves is arranged a metal connecting section 40, 42. The latter is fixed by means of lag screws 44, 46 to the coupling key 30 and covers the joint between the two. keys 30 and 30 '.
- the metal connecting section 40 arranged in the upper connection groove has a central section "U" 48, of width substantially identical to the width of the upper groove, with two outer lateral wings 50, 50 ', which are resting on the metal sheet 20, respectively 20 ', along the upper groove.
- the base 52 of the central section 48 in "U” is fixed by means of the screws of the laggable type 44 to the key 30.
- a fixing plate 54 is fixed on the metal connecting section 40, using self-drilling screws 56, 58, so as to close the central section 48 in "U” upwards.
- the self-drilling screws 56 pass through the fixing plate 54, the base 52 of the central section 48 "U” of the metal connecting section 40 to be screwed through the second flange 36 of the sheet 18 in the key 30.
- the self-drilling screws 58 pass through the fixing plate 54 and the lateral flanges 50, 50 'of the connecting metal section 40 to screw through the sheet 18 in the core 12.
- the reference numeral 60 identifies an attachment point for a suspension rod 62.
- This attachment point 60 is advantageously a nut nut type FABRO-RIVEKLE ® or equivalent, which is placed using a device in a hole in the fixing plate 54, and can even be put in place after having fixed the fixing plate 54 to a metal connecting section 40.
- the suspension rod 62 then comprises a threaded end which is screwed into the flooded nut 60.
- the metal fitting section 42 arranged in the lower connection groove also has a section "U" 64, which has a width substantially identical to the width of the lower groove. Instead of the two outer lateral wings, it has two inner wings 66, 66 'serving to support a cover plate 68.
- the base 70 of the "U" section 64 is fixed with the help of screws of the pulling type. 72 to the key 30.
- the cover plate 68 which closes the section "U" 64 downwardly flush with the plates 18, 18 ', is fixed on the two inner wings 66, 66' with self-drilling screws 74.
- the two metal connecting sections 40, 42, the fixing plate 54 and the cover plate 68 are preferably coated with an alloy composed of aluminum and zinc, such as ALUZINC ® sheets mentioned above.
- a suspended ceiling according to the invention may have a classification firestop REI 120 (European standards), which means that with a fire defined in the standard, a seal to the flames, hot gases and toxic is ensured for 120 minutes and that, during the same time, the temperature on the surface opposite the fire does not exceed 140 0 C on average and 180 0 C punctually.
- the suspended ceiling can be easily dimensioned to withstand permanent suspended loads of at least 500 N / m 2 (eg luminaires or other equipment) and a temporary load of at least 1000 N / m 2 (eg when working in the suspended ceiling vacuum).
- a suspended ceiling according to the invention has a high hygienic and environmental quality.
- it can essentially consist of easily recyclable materials (steel and mineral materials).
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
LU91476A LU91476B1 (fr) | 2008-09-10 | 2008-09-10 | Plafond suspendu formant un écran coupe-feu |
PCT/EP2009/060554 WO2010028928A1 (fr) | 2008-09-10 | 2009-08-14 | Plafond suspendu formant un ecran coupe-feu |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2340339A1 true EP2340339A1 (fr) | 2011-07-06 |
Family
ID=40513973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09781856A Withdrawn EP2340339A1 (fr) | 2008-09-10 | 2009-08-14 | Plafond suspendu formant un ecran coupe-feu |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2340339A1 (fr) |
LU (1) | LU91476B1 (fr) |
WO (1) | WO2010028928A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108425455B (zh) * | 2018-03-05 | 2019-12-27 | 中国建筑第二工程局有限公司 | 一种用于冷库板吊顶反装施工工艺节点及施工工法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8803779U1 (de) * | 1988-03-19 | 1988-06-16 | Schmitt, Jürgen, 6302 Lich | Deckenelement |
GB9809547D0 (en) * | 1998-05-06 | 1998-07-01 | Mss Clean Technology Limited | Fire resistant ceiling and a ceiling panel for a fire resistant ceiling |
DE29821741U1 (de) * | 1998-12-07 | 1999-02-18 | Gebr. Knauf Westdeutsche Gipswerke, 97346 Iphofen | Bauvorsatzschale mit Feuerschutz-Schallschutz-Eigenschaften |
DE202004019762U1 (de) * | 2004-12-22 | 2005-03-10 | Knauf Gips Kg | Zwischenauflager für eine Unterdecke und Unterdecke, insbesondere Brandschutz-Unterdecke |
-
2008
- 2008-09-10 LU LU91476A patent/LU91476B1/fr active
-
2009
- 2009-08-14 EP EP09781856A patent/EP2340339A1/fr not_active Withdrawn
- 2009-08-14 WO PCT/EP2009/060554 patent/WO2010028928A1/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2010028928A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010028928A1 (fr) | 2010-03-18 |
LU91476B1 (fr) | 2010-03-11 |
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