EP1092815A1 - Fire-resistant partition - Google Patents

Abstract

Fireproof wall of high height has a part integral with the upper roof (2a) and a part integral with the lower floor (2b). The superior part (1) has a sheet (11) folded and opened in the inferior end in which the inferior part (3) can slide. The inferior part is made of metallic vertical posts (4) surrounding a core of fire-resistant material (7) and covered by plaster sheets (6). The upper part is made of metallic structure linked with the sheet and the roof and coated with plaster.

Description

The invention relates to the technical field of fitting out buildings, in particular the fitting out of premises by the installation of partitions or fire walls.

We already know, in the prior art, different embodiments of walls firewall.

In a large number of cases, the wall structures used are multilayer or sandwich.

• le document FR-2 655 675 décrit un panneau de cloisonnement isolant et coupe-feu comprenant une âme de mousse de verre collée entre deux parements ;
• le document FR-A-2 663 660 décrit un panneau sandwich comprenant deux tôles en acier et une âme en produit réfractaire ;
• le document EP-A-0 390 999 décrit un matériau coupe-feu comprenant une âme, une couche de surface décorative et une couche coupe feu métallique à tissu ignifuge placée entre l'âme et la couche décorative ;
• le document EP-A-0 312 618 décrit un matériau antifeu comprenant deux parements en béton léger armé de fibres et une âme isolante en mousse de polyuréthanne ou en polystyrène ;
• le document FR-A-2 674 885 décrit une cloison coupe-feu comprenant une âme à base de plâtre entouré de laine de roche, de verre ou de céramique, deux couches extérieures d'habillage enserrant l'âme ;

So, for example:

• document FR-2 655 675 describes an insulating and fire-resistant partition panel comprising a glass foam core bonded between two facings;
• document FR-A-2 663 660 describes a sandwich panel comprising two steel sheets and a core of refractory product;
• document EP-A-0 390 999 describes a fire-resistant material comprising a core, a decorative surface layer and a metal fire-resistant layer with fire-retardant fabric placed between the core and the decorative layer;
• document EP-A-0 312 618 describes a fire-resistant material comprising two facing in light concrete reinforced with fibers and an insulating core in polyurethane foam or in polystyrene;
• document FR-A-2 674 885 describes a fire barrier comprising a plaster-based core surrounded by rock wool, glass or ceramic, two outer layers of covering enclosing the core;

We can also refer to the following other documents: EP-A-0 875 371, EP-A-0 761 896, EP-A-0 718 447, EP-A-0 684 348, EP-A-0 663 482, EP-A-0 654 566, EP-A-0 631 865, EP-A-0 624 462, EP-A-0 557 226, EP-A-0 546 279, EP-A-0 543 349, EP-A-0 511 017, EP-A-0 507 713, EP-A-0 501 271, WO-A-97 34765, WO-A-97 21884, WO-A-96 20829, WO-A-96 01347, WO-A-95 10673, WO-A-92 15452, FR-A-2 710 930, FR-A-2 695 159, FR-A-2 687 709.

We also know fire partitions provided with a framework metal to which panels such as those are directly attached described in the documents above.

Such partitions have many disadvantages.

Conventionally, no means are provided to accommodate the differential thermal expansion of the partition, due to the strong gradient thermal between the face opposite the flames and the other face of the partition.

Document FR-A-2 713 323 describes a partition system in which the vertical steel posts of the frame are provided with a telescopic element adjustable in height, blocked on the post by a separable fixing means by heat, so that the telescopic element and the post are made free to expand under the effect of heat.

The partition system described in document FR-A-2 713 323 does not allow the accommodation of large deformations, of the order of several tens of centimeters, under the effect of heat.

Such deformations are encountered in particular in the case of partitions high-rise fire stop, of the order of 2 to 18 meters in height per example.

Document WO-A-97/21012 describes a fire barrier comprising two parts fixed one to a high floor, the other to a low floor, and capable of slide relative to each other over a certain stroke, this sliding being guided by a guide piece linked to the underside of the high floor.

This partition is mounted with a clearance at the top, around 25 mm, allowing to partially accommodate the deformations of the high floor by compared to the low floor over substantially this height.

• d'une part, le coulissement des deux parties de la cloison l'une par rapport à l'autre, même de faible amplitude, entraíne la détérioration des plaques de la partie inférieure de la cloison ;
• d'autre part, la hauteur totale du déplacement est limitée, en particulier par le jeu en partie haute.

The structure of the sliding guide piece, which has walls offset laterally with respect to each other, and its position between plates in the upper part of the partition and plates in the lower part of the partition. a double problem:

• on the one hand, the sliding of the two parts of the partition with respect to each other, even of small amplitude, causes the deterioration of the plates of the lower part of the partition;
• on the other hand, the total height of the movement is limited, in particular by the clearance in the upper part.

This partition, intended to absorb hot deformation in the event of fire, will be totally destroyed after fire.

Another problem posed by this partition lies in the fact that the piece of guidance is linked to the underside of the high floor. Indeed, as a result, this partition does not allow the passage of pipes, ducts, or accessories, whose supports are fixed on the underside of the Gold floor, the crossings of partition must be in a fixed part with respect to the underside of high floor to avoid tearing when the boom changes floor.

Furthermore, the partition described in document WO-A-97/21012 does not have not the characteristics necessary for its use in the industrial field, field in which the constraints are particularly demanding.

The loads in an industrial environment can vary considerably depending on the operation or change of destination of the premises. The requests that ensue cold cyclic movements which must be accepted without damage over time by the sliding system. Now the interior plates of the partition described in document WO-A- 97/21012 are deteriorated during sliding, even of small amplitude.

In addition, it is common for industrial units to have doors monumental of several tons that light partitions are unable to resume. The partition described by document WO-A-97/21012 cannot have internal beams intended to support doors, in particular.

The invention aims to solve the problems posed by the prior art.

The invention discloses a fire wall structure allowing the accommodation of large amplitude deformations, for example when the high floor sags during a fire, this partition can provide in addition to a fire resistance of more than two hours at 1000 ° C, on one any of its faces.

The invention also discloses a supporting structure for this partition.

To this end, the invention relates in a first aspect to a firewall comprising a lower part linked to a low floor and a part upper linked to a high floor, the upper part of the partition comprising a folded sheet metal sheet open at the bottom, located at a distance from the high floor, and in which the lower part of the partition is able to slide, so that the relative deformations of the high floor compared to the low floor can be accommodated.

The lower part of the partition includes a metal frame core having vertical uprights, as well as fire-retardant stuffing, plates facing being arranged on either side of this core.

• sa hauteur est comprise entre deux et dix-huit mètres ;
• la partie inférieure de la cloison comprend un bourrage ignifuge réalisé en un matériau choisi parmi le groupe comprenant les laines de verre, les laines de roche, les mélanges d'hydroxydes métalliques et de liant magnésien ou tout autre matériau équivalent ;
• les plaques de parement sont réalisées en un matériau coupe-feu choisi parmi le groupe comprenant les plâtres, les plâtres armés de fibres de verre, les plâtres armés à fibre de cellulose, les micas expansés, les bétons légers, les bétons cellulaires, les plaques de parement pouvant être revêtues par des tôles en acier noir ou inox jointoyées dans le cas de salles blanches ;
• les plaques de parement placées d'un côté de la partie inférieure de la cloison s'étendent sur une hauteur sensiblement égale à celle des plaques de parement placées sur l'autre côté de la partie inférieure de la cloison, cette hauteur étant inférieure à celle des montants verticaux de l'ossature métallique ;
• la largeur du bourrage ignifuge est sensiblement égale à la largeur de l'ossature métallique ;
• la partie supérieure de la cloison comprend des suspentes verticales et des moyens d'assemblage des suspentes verticales à la tôle filante et au plancher haut respectivement, de sorte que la partie supérieure de la cloison est pourvue d'une ossature métallique incorporant un ensemble de portiques suspendus sous le plancher haut ;
• l'ossature de la partie supérieure de la cloison est métallique et est revêtue, enrobée ou enduite d'un matériau coupe-feu choisi parmi le groupe comprenant : les plâtres, les plâtres armés de fibres de cellulose, les micas expansés tels que vermiculite, les perlites, les peintures intumescentes, les argiles expansées, les bétons légers, les bétons cellulaires, les mortiers de chaux, les mortiers de ciments ou de plâtres, ou tout autre matériau équivalent ;
• l'ossature de la partie supérieure de la cloison est une double ossature, mise en oeuvre entre les suspentes ponctuelles et entre le plancher haut et la tôle filante, chaque ossature comprenant un rail haut, sous le plancher haut, un rail bas solidaire de la tôle filante, et des montants doubles solidaires des rails hauts et bas ;
• la cloison comporte des structures intérieures indépendantes pouvant recevoir des portes ou des charges lourdes.

The partition has, according to different embodiments, the following complementary characters, taken alone or in combination:

• its height is between two and eighteen meters;
• the lower part of the partition comprises a fire-retardant packing made of a material chosen from the group comprising glass wools, rock wools, mixtures of metal hydroxides and magnesium binder or any other equivalent material;
• the facing plates are made of a fire-resistant material chosen from the group comprising plasters, plasters reinforced with glass fibers, reinforced plasters with cellulose fiber, expanded micas, light concretes, cellular concretes, plates facing which can be coated with black steel or stainless steel sheets joined together in the case of clean rooms;
• the facing plates placed on one side of the lower part of the partition extend over a height substantially equal to that of the facing plates placed on the other side of the lower part of the partition, this height being less than that vertical uprights of the metal frame;
• the width of the flame retardant packing is substantially equal to the width of the metal frame;
• the upper part of the partition comprises vertical hangers and means for assembling the vertical hangers to the sheet metal and to the high floor respectively, so that the upper part of the partition is provided with a metal frame incorporating a set of gantries suspended under the high floor;
• the framework of the upper part of the partition is metallic and is coated, coated or coated with a fire-resistant material chosen from the group comprising: plasters, plasters reinforced with cellulose fibers, expanded micas such as vermiculite, perlites, intumescent paints, expanded clays, light concretes, cellular concretes, lime mortars, cement or plaster mortars, or any other equivalent material;
• the framework of the upper part of the partition is a double framework, implemented between the point lines and between the high floor and the sheet metal, each framework comprising a high rail, under the high floor, a low rail secured to the sheet metal, and double uprights secured to the top and bottom rails;
• the partition has independent interior structures that can accommodate doors or heavy loads.

• la figure 1 est une vue en coupe transversale d'une cloison coupe-feu, selon un mode de réalisation de l'invention ;
• la figure 2 est une vue de dessus de la paroi coupe-feu de la figure 1 ;
• la figure 3 est une vue agrandie d'une partie de la paroi coupe-feu de la figure 1 ;
• la figure 4 représente une structure supportant la cloison de la figure 1 et permettant la création d'ouvertures ;
• la figure 5 est une vue selon la coupe A-A de la structure de la figure 4 ;
• la figure 6 est une vue selon la coupe B-B de la structure de la figure 4.

Other objects and advantages of the invention will appear during the following description of embodiments, with reference to the appended figures among which:

• Figure 1 is a cross-sectional view of a firewall, according to an embodiment of the invention;
• Figure 2 is a top view of the fire wall of Figure 1;
• Figure 3 is an enlarged view of part of the fire wall of Figure 1;
• Figure 4 shows a structure supporting the partition of Figure 1 and allowing the creation of openings;
• Figure 5 is a view along section AA of the structure of Figure 4;
• FIG. 6 is a view along section BB of the structure of FIG. 4.

Figure 1 shows, in cross section, a fire wall 1 provided a device for absorbing hot deformation of a floor top 2a and, if applicable, metal doors.

It is understood that the high floor 2a, like the low floor 2b to which the partition 1 is associated may be subject to deformation, in particular during a fire.

By partition or wall, conventionally means elements substantially vertical non-carriers intended to ensure compartmentalisation internal of a building.

• les cloisons fixes, destinées à rester en place de façon permanente et dont les éléments constitutifs peuvent nécessiter lors de la mise en oeuvre des finitions complémentaires. En cas de transformations, les éléments constitutifs ne sont que difficilement récupérables et les travaux de démolition sont générateurs de certaines détériorations ;
• les cloisons menuisées, habituellement en bois et réalisées spécialement aux mesures du local, à l'aide d'éléments non standardisés montés sur une ossature généralement construite sur place ;
• les cloisons démontables, dont les éléments arrivent finis ou pré finis sur le chantier. Leur démontage s'effectue sans détérioration notable et les éléments constitutifs sont le plus souvent réutilisables ;
• les cloisons amovibles, dont les éléments arrivent totalement finis sur le chantier. Les éléments constitutifs de ces cloisons amovibles sont facilement démontables et remontables sans dégradation et sont interchangeables entre eux ;
• les cloisons mobiles dont les éléments se déplacent dans un système fixe solidaire du gros oeuvre, les cloisons étant coulissantes, pliantes ou articulées.

Several types of partitions can be distinguished:

• fixed partitions, intended to remain in place permanently and whose constituent elements may require during the implementation of additional finishes. In the event of transformations, the constituent elements are only difficult to recover and the demolition work generates certain deteriorations;
• joinery partitions, usually made of wood and specially made to measure the room, using non-standardized elements mounted on a framework generally constructed on site;
• demountable partitions, the elements of which arrive finished or pre-finished on site. They are dismantled without significant deterioration and the components are most often reusable;
• removable partitions, the elements of which arrive completely finished on site. The components of these removable partitions are easily removable and reassemblable without degradation and are interchangeable with each other;
• movable partitions, the elements of which move in a fixed system integral with the structural work, the partitions being sliding, folding or articulated.

The invention relates to fire partitions, of the fixed, removable or removable.

These partitions 1 can extend over a great height, for example of the order of seven meters, and over a great length, for example of the order of forty meters.

In the following text, the numerical data, mentioned by way of example of realization (said Example), relate to a partition of 6.9 m high and 40 m long.

The terms "vertical", "height", "top", "bottom", "bottom", “Superior” will be used subsequently with reference to direction D1 of the figure.

The terms "horizontal", "width" will be used subsequently with reference to direction D2 in the figure.

The term "length" will be used subsequently with reference to direction D3 in the figure, the directions D1, D2 and D3 forming a direct trihedron.

Initially, the partition will be described in its initial mounting state, not deformed.

The partition 1 shown comprises a lower part 3 secured to the floor bottom 2b.

By floor, we mean a structural element supporting the floor of a floor and constituting the horizontal separation between two floors.

The upper floors 2a and lower 2b between which the partition 1 is placed may be concrete slabs, mixed concrete-steel structures, concrete slabs armed. The floors can be in particular solid or ribbed slabs, in a box or even hollowed out.

For improved fire protection, high and low floors can include a deposit of perlite or vermiculite projected or glued in a plate on their undersides. The steel beams possibly contained in the floors can also be coated or coated with fire retardant material.

The lower part 3 of the partition 1 comprises a metal frame core in the shape of a parallelepiped, composed of a bottom rail 5 and uprights vertical 4, the spacing of which varies as a function of the height of the partition.

In the embodiment shown, this bottom rail 5 is a steel profile, in U shape in cross section.

Facing plates 6 are placed on the two lateral faces of the vertical metal uprights 4, on either side of the partition 1.

The facing plates 6 placed on one side of the partition 1 extend over a height h6 substantially equal to that of the facing plates placed the other side of the partition 1, this height h6 being less than that h4 of vertical metal uprights 4.

Between these uprights 4 is placed a fireproof stuffing 7, made of a material chosen from the group comprising rock wool fibers, glass, mixtures of metal hydroxides and magnesium binder or any other equivalent material.

The choice of plate material used depends in particular, as it is known to those skilled in the art, the desired fire resistance for a thickness and a given density of facing material.

In the example, these facing plates 6 are of the 2x2 Placoflam® type.

The width 17 of the fireproof panel 7 is substantially equal to the width 14 of the metal frame.

In the Example, the flame retardant packing 7 is a rock wool of thickness 80 mm, height 370 mm and density greater than 100kg / m3, from type sold under the reference Rockfeu® 520.

The metal frame of the lower part of the partition is, in a fashion realization, entirely in steel. In other embodiments, some parts of the framework, in particular those with low load-bearing capacity, are made of material lightweight.

In the example, this frame includes a double upright of 90 arranged following a center distance of 400mm.

We will now describe the upper part of the partition 1, capable of sliding by compared to the lower part of this partition 1, in particular under the effect of a deformation of the high floor 2a during a fire.

• l'âme 12 sensiblement horizontale d'une tôle pliée filante 11 ouverte vers le bas ;
• une première platine 13 sensiblement horizontale ;
• l'âme 14 d'une tôle filante 15 en U ouverte vers le bas ;
• une deuxième platine 16 sensiblement horizontale ;
• une suspente ponctuelle verticale 17 solidaire de la deuxième platine 16 ;
• une troisième platine 18 et une quatrième platine 19, sensiblement horizontales, fixées dans le plancher haut 2a.

Starting from the substantially horizontal upper edge 10 of the flame-retardant packing 7 and the vertical uprights 4 and going vertically towards the high floor 2a, there are successively:

• the substantially horizontal core 12 of a bent sheet metal sheet 11 open downward;
• a first substantially horizontal plate 13;
• the core 14 of a shooting sheet 15 in a U open downwards;
• a second substantially horizontal plate 16;
• a vertical point hanger 17 secured to the second plate 16;
• a third plate 18 and a fourth plate 19, substantially horizontal, fixed in the high floor 2a.

• la tôle pliée filante 11 est une tôle en acier de 4 mm d'épaisseur, pliée en 5 de 20x450x100x450x20, fixée dans la première platine 13 de 100x100x10 à l'aide de quatre boulons de 8mm de diamètre au travers de trous oblongs de 10x40 ;
• la tôle filante 15 est un profilé de type UAP 100 composé de modules de longueur 4200, boulonné en partie inférieure des suspentes ponctuelles 17 ;
• la deuxième platine 16 est en acier de 100x100x10, soudé à l'âme 14 des suspentes verticales 17 et boulonné sur la tôle 15 ;
• les suspentes ponctuelles 17 sont des poutres types HEA de hauteur 1000 ;
• les troisième et quatrième platines sont en acier respectivement de 200x350x20 et de 300x350x20 fixées dans le plancher haut par six chevilles de type Hilti HSCI M 10x60, ou des tiges filetées fixées elles-mêmes sur une contre-plaque noyée.

In the Example:

• the folding folded sheet 11 is a steel sheet 4 mm thick, folded in 5 of 20x450x100x450x20, fixed in the first plate 13 of 100x100x10 using four 8mm diameter bolts through oblong holes of 10x40;
• the sheet metal 15 is a UAP 100 type profile composed of modules of length 4200, bolted to the lower part of the point lines 17;
• the second plate 16 is made of 100 × 100 × 10 steel, welded to the core 14 of the vertical lines 17 and bolted to the sheet 15;
• the point lines 17 are HEA type beams of height 1000;
• the third and fourth plates are made of steel of 200x350x20 and 300x350x20 respectively fixed in the high floor by six Hilti HSCI M 10x60 dowels, or threaded rods fixed themselves on a submerged counterplate.

As understood by a person skilled in the art, the upper part of the partition 1 includes a metal frame incorporating a set of gantries suspended under the high floor 2a, in alignment with the partition 1.

• la distance, mesurée suivant la direction D3, entre les suspentes ponctuelles est de 2,6 m maximum, la dimension en porte à faux des consoles formées par les tôles 15 étant de 1,2 m maximum par rapport aux suspentes 17, les deuxièmes platines 16 étant disposées suivant l'entraxe des HEA ;
• un jeu d'extrémité de dilatation de 20 est laissé entre les tôles filantes 11, la position des boulons d'assemblage de ces tôles dans leurs trous oblongs permettant la dilatation des tôles filantes 11 vers leurs deux extrémités.

In the Example:

• the distance, measured in direction D3, between the point lines is 2.6 m maximum, the cantilevered dimension of the brackets formed by the sheets 15 being 1.2 m maximum relative to the lines 17, the second plates 16 being arranged along the distance between the HEA;
• an expansion end clearance of 20 is left between the sheet metal sheets 11, the position of the assembly bolts of these sheets in their oblong holes allowing the sheet metal sheets 11 to expand towards their two ends.

The fire protection of the metal framework of the part is now described. bulkhead 1.

Each metallic element of the framework is coated, coated or coated with a material chosen from the group comprising; plasters, plasters armed with cellulose fibers, expanded micas such as vermiculite, perlites, intumescent paints, expanded clays, light concretes, concretes cell, lime mortars, cement or plaster mortars, or any other equivalent material.

• un encoffrement des suspentes ponctuelles 17 par une couche de Stucal® de 10x120 ou 20x120 est réalisé, les plaques de Stucal étant fixées tous les 150mm dans les angles par l'intermédiaire de vis type VSCG de longueur 45 mm ;
• une bande 21 de Stucal® ou de laine minérale Domisol® est mise en place sur les faces latérales extérieures verticales des tôles filantes 11, ces bandes 21 étant maintenues en place par deux cornières filantes haute et basse de 6/10 et 32x23, soudées par points sur les tôles filantes 11 ;
• un flocage 22 d'épaisseur totale 40 mm en Dossolant® 2000S est réalisé sur les troisièmes et quatrième platines 18, 19, en deux passes d'épaisseur 20mm, avec mise en place d'un grillage ordinaire fixé par vissage.

In the Example, and following figure 2:

• the point lines 17 are encased with a 10x120 or 20x120 layer of Stucal® is made, the Stucal plates being fixed every 150mm in the corners by means of VSCG screws of 45mm length;
• a strip 21 of Stucal® or of Domisol® mineral wool is placed on the vertical external lateral faces of the sheet metal sheets 11, these strips 21 being held in place by two high and low angle angles of 6/10 and 32x23, welded by points on the shooting plates 11;
• a flocking 22 of total thickness 40 mm in Dossolant® 2000S is carried out on the third and fourth plates 18, 19, in two passes of thickness 20mm, with the installation of an ordinary grid fixed by screwing.

We now describe the enclosure of the metal framework of the part bulkhead 1.

• une double ossature en doubles rails de 70 est mise en oeuvre entre les suspentes 17 ponctuelles et entre le plancher haut 2a et la tôle filante 11 ;
• chaque ossature comprend un rail haut, sous le plancher haut 2a, des montants doubles disposés à entraxe 600 mm, un rail bas vissé sur la tôle filante 11, les montants doubles étants suspendus en tête par vissage dans les rails haut, et maintenus en bas par vissage dans les rails bas ;
• des panneaux de laine de roche d'épaisseur 80mm et de masse volumique de l'ordre de 40kg/m3 sont placés dans les ailes des montants doubles ;
• l'ossature métallique est recouverte sur ses faces extérieures par deux ou trois couches 23 de Placoflam® 12,5, ces plaques 23 descendant jusqu'au niveau +5630 mm soit 220 mm au dessus de l'arase inférieure de la tôle filante 11. Ces plaques 23 sont fixées par des vis type VSCG dans la plaque de Stucal® de l'encoffrement des suspentes 17 et dans les ailes de la tôle filante 11.

In the Example and following Figures 1 and 2:

• a double frame in double rails of 70 is implemented between the point lines 17 and between the high floor 2a and the sheet metal 11;
• each frame comprises a high rail, under the high floor 2a, double uprights arranged at a center distance of 600 mm, a low rail screwed onto the sheet metal 11, the double uprights being suspended at the head by screwing in the top rails, and held below by screwing in the bottom rails;
• 80mm thick rock wool panels with a density of around 40kg / m3 are placed in the wings of the double uprights;
• the metal framework is covered on its outer faces by two or three layers 23 of Placoflam® 12.5, these plates 23 descending to the level +5630 mm, ie 220 mm above the lower level of the sheet metal 11. These plates 23 are fixed by screws type VSCG in the Stucal® plate of the casing of the lines 17 and in the wings of the sheet metal 11.

The position and sliding of the upper part of the partition with respect to its lower part will now be described.

The height h1 between the top level of the vertical uprights 4 of the framework metal of the lower part of the partition and the plane of the core 12 of the sheet metal 11 contained in the upper part of the partition corresponds to the stroke of displacement of the upper part of the partition with respect to the part lower, for example when the high floor collapses during a fire.

This deformation accommodation is obtained by sliding the two partition parts 1 relative to each other.

Flame retardant packing 7, for example in rock wool, plug-shaped thermal and gaseous during this sliding.

The internal faces 24 of the facing plates 23 of the upper part of the partition slide on the external faces 25 of the facing panels of the part partition 1.

In the Example, a vertical deformation of maximum amplitude ranging from +70 mm to -70 mm from a middle position corresponding to equal deformations of the high and low floors could be accommodated by the fire barrier. This amplitude can reach a value of ± if necessary 200 mm from the average value.

We now describe the structure supporting the partition in FIG. 1, and allowing the creation of openings, with reference to Figures 4, 5 and 6.

This structure 30 includes 3 vertical posts 31a, 31b, 31c made up of 90x90x5 tubes filled with concrete, the height of which is identical to the posts vertical of the current metal framework of the partition 1; the center post 31b being formed by two joined tubes. These vertical posts can be doubled or replaced by other profiles depending on the loads to be picked up.

The posts 31a, 31b, 31c are anchored at the bottom by plates 32 fixed on the low floor 2b, and slide at the head inside a U-shaped beam 34, made of sheet metal folded 4mm thick. This beam 34, linked to the building, prevents the spillage of posts 31a, 31b, 31c.

These posts allow the same vertical clearance of the floors as the partition 1.

The posts 31a, 31b, 31c are connected by a cross member 33 made from two 90x90x5 tubes also filled with concrete, linked by two sails welded in 4 mm sheet. On this cross-member 33 are fixed the door supports sliding doors or any other heavy object.

This cross member is integral with the end posts 31a, 31c, and connected to the central post 31b by a furageage system allowing free expansion of said cross member, so as not to cause bending of the posts.

The assembly composed of the posts 31a, 31b, 31c and of the cross-member 33 forms two gantries 35, 36 attached to the level of the central post 31b.

The interior of the gantries 35, 36 can be empty in normal service in order to create a passage opening and closed in the event of a disaster by a fire door sliding.

Above and below the cross-member 33, the solid partition is made up of the same way as the partition 1 described above.

A rail identical to the bottom rail of the partition 1 is placed on the cross-member 33 to hold the vertical uprights, but is not integral with the cross-member 33 so as not to be driven by the expansion of said cross.

Claims (11)

Fire barrier intended to be placed between a high floor (2a) and a low floor (2b), comprising on the one hand a lower part (3) linked to the low floor (2b) and, on the other hand, an upper part linked to the floor top (2a), characterized in that the upper part of the partition (1) comprises a bent sheet metal sheet (11) open downwards, located at a distance from the floor top (2a), and in which the lower part (3) of the partition (1) is suitable for slide, so that the relative deformations of the high floor (2a) by compared to the low floor (2b) can be accommodated. Partition according to claim 1, characterized in that the part lower (3) of the partition (1) comprises a metal frame core having vertical uprights (4), as well as a flame retardant packing (7); of facing plates (6) being arranged on either side of this core. Partition according to claim 1 or 2, characterized in that the stuffing flame retardant (7) is made of a material chosen from the group comprising: glass wool, rock wool, mixtures of metal hydroxides and magnesium binder or any other equivalent material. Partition according to claim 2 or 3, characterized in that the plates facing (6) are made of a material chosen from the group comprising plasters, plasters reinforced with glass fibers, reinforced plasters with fiber cellulose, expanded micas, light concretes, cellular concretes; the facing plates (6) which can be coated with black steel sheets or jointed stainless steel. Partition according to any one of Claims 2 to 4, characterized in that that the facing plates (6) placed on one side of the lower part (3) of the partition (1) extend over a height (h6) substantially equal to that of facing plates (6) placed on the other side of the lower part (3) of the partition (1), this height (h6) being less than the height (h4) of the uprights vertical (4) of the metal frame. Partition according to any one of Claims 2 to 5, characterized in that that the width (l7) of the flame retardant packing (7) is substantially equal to the width (14) of the metal framework. Partition according to any one of Claims 1 to 6, characterized in that that the upper part of the partition (1) includes lines vertical (17) and means (16, 18, 19) assembling the lines vertical (17) to the sheet metal (11) and to the high floor (2a) respectively, of so that the upper part of the partition (1) is provided with a framework metallic incorporating a set of gantries suspended under the floor high (2a). Partition according to claim 7, characterized in that the framework of the the upper part of the partition (1) is metallic and is coated, coated or coated with a material chosen from the group comprising: plasters, plasters reinforced with cellulose fibers, expanded micas, vermiculites, perlites, intumescent paints, expanded clays, light concretes, cellular concretes, lime mortars, cement or cement mortars plasters, or any equivalent material. Partition according to claim 7 or 8, characterized in that the framework of the upper part of the partition (1) is a double framework, implemented between the point lines (17) and between the high floor (2a) and the sheet metal continuous (11), each frame comprising a high rail, under the floor top (2a), a bottom rail secured to the sheet metal (11), and double uprights secured to the top and bottom rails. Partition according to any one of Claims 1 to 9, characterized in that that its height is between two and eighteen meters. Partition according to any one of Claims 1 to 10, characterized in what it has independent interior structures that can receive doors or heavy loads.

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