EP2312075A1 - Device for covering and protecting steel joists against fire - Google Patents

Device for covering and protecting steel joists against fire Download PDF

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Publication number
EP2312075A1
EP2312075A1 EP09173200A EP09173200A EP2312075A1 EP 2312075 A1 EP2312075 A1 EP 2312075A1 EP 09173200 A EP09173200 A EP 09173200A EP 09173200 A EP09173200 A EP 09173200A EP 2312075 A1 EP2312075 A1 EP 2312075A1
Authority
EP
European Patent Office
Prior art keywords
elements
covering
section
against fire
protection against
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Withdrawn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
EP09173200A
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German (de)
French (fr)
Inventor
Denis Zago
Romain Keiser
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.)
Liberty Liege Dudelange LU SA
Original Assignee
ArcelorMittal Dudelange SA
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 ArcelorMittal Dudelange SA filed Critical ArcelorMittal Dudelange SA
Priority to EP09173200A priority Critical patent/EP2312075A1/en
Priority to EP10768909A priority patent/EP2488706A1/en
Priority to PCT/EP2010/065133 priority patent/WO2011045247A1/en
Publication of EP2312075A1 publication Critical patent/EP2312075A1/en
Withdrawn legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • E04B1/941—Building elements specially adapted therefor
    • E04B1/943—Building elements specially adapted therefor elongated
    • E04B1/944—Building elements specially adapted therefor elongated covered with fire-proofing material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • E04B1/941—Building elements specially adapted therefor
    • E04B1/943—Building elements specially adapted therefor elongated

Definitions

  • the invention relates to a cladding device or partitioning and fire protection of beams, more particularly of metal beams of buildings.
  • the patent document GB 1,010,699 discloses a dressing and modular fire protection device. It consists of a box of rectangular section approximately corresponding to the envelope of the section of the beam (IPE, IPN, HEB, HED, ...) and formed of several elements ready to be assembled. These elements are panels corresponding essentially to the walls of the cowling, these elements having the particularity of being provided with fast and simple fastening means.
  • the elements each consist of a fireproof material panel, typically asbestos, covered with a metal sheet finish. At the connecting edges of the panels, the sheet protrudes and is folded back on itself so as to form either a fastening means of the male type, or a female type fixing means intended to cooperate with a male means by insertion of the latter in order to ensure a quick fixation.
  • the female means is an elongated and tight loop formed by the folding of the sheet protruding from the edge of one of the elements forming the box.
  • a branch of this loop comprises an extra thickness forming a shoulder.
  • the male means is formed by folding the end of the sheet protruding from the edge of one of the elements forming the box so as to form an extra thickness with a shoulder.
  • the two shoulders are intended to cooperate by hooking once the male means inserted into the female means.
  • One of the elements forming the box may also have a U-shape intended to surround the casing of the beam, knowing that another plane element then comes "close” the box by fastening means similar to those described above. These fastening means are very easy to assemble but have a series of disadvantages.
  • each element generally corresponds to one or more faces of the box, which means that the connections are made at the edges of the box. Any removal of an element is likely to destabilize the rest of the box. In practice, the connecting edges of the rest of the box may move indicating that the winding of the element will be made more difficult.
  • the object of the invention is to propose a solution for the cladding and the protection against the fire of a particular metal building truss overcoming at least one of the abovementioned disadvantages. More In particular, the object of the invention is to provide a solution for covering and protection against log fire which is aesthetic, easy to implement, inexpensive and allowing easy access to the volume of the beam for the work of installation and maintenance of cables and piping.
  • the invention consists of a covering device and fire protection of a beam including metal, comprising a panel of fire resistant material covered with a metal sheet; the box comprising a first and a second element of generally U-shaped section with a central portion corresponding to the hollow of the U and two side portions corresponding to the branches of the U, and intended to be arranged vis-à-vis so as to marry both sides opposing the beam and so that the ends of at least two of the side portions of the first and second elements, respectively, arranged vis-à-vis, meet directly or indirectly via a third element of generally straight section and intended to be fixed to the first and second elements by interconnecting the two lateral parts and arranged vis-à-vis.
  • the use of two U-shaped section elements arranged vis-à-vis, possibly supplemented by at least one plane element connecting the two U-shaped elements at least on one side of the U is particularly advantageous. It gives the box a greater rigidity and makes mounting easier.
  • the U-shaped elements can be put in place with respect to the beam by simple wedging means.
  • the flat element or elements coming to close the box by connecting the two U-shaped elements on one or both sides can be easily set up and guarantee access to the volume of the beam reserved for example for pipes and / or cables electric.
  • the U-section elements can be dimensioned for a given beam width, regardless of the beam section, the planar and much simpler elements can be executed in different dimensions so as to correspond to the different heights of common beams. It results a modular construction to dress beams of different dimensions without systematically requiring specific dimensions elements.
  • the box comprises a fourth element of generally straight section and intended to be fixed to the first and the second element on the opposite side to the third element by interconnecting two lateral parts of the first and second elements, respectively , and arranged vis-à-vis.
  • a second planar element is indicated for the beams whose section comprises two opposite volumes, as typically a section in H.
  • the two elements of the box and section U can each have a branch of the U to be connected to the branch vis-à-vis the other element once set up around the beam, and this on the side of the soul of the beam.
  • a single closure plane element is then arranged on the other side connecting the two U-section elements and close the volume of the section of the beam.
  • the first and second elements, and on the other hand the third and / or fourth elements comprise mutual fixing means such that the latter are matched by a simple approach movement of the third and / or fourth element to the first and second elements.
  • This measure has the advantage of allowing assembly and also easy dismantling of the closure elements, in particular with respect to the teaching of GB 1,010,699 discussed above, which facilitates maintenance operations requiring access to the volume of the beam and dressed by the box.
  • the device comprises at least at least one, preferably two or four metal caps (28) intended to cover the direct connection zone (s) between the first and the second element (10, 12). ) and / or between the first and second element (s) (10, 12) and the third fourth elements (20, 22) and preferably flush with the outer surfaces of said elements on either side of the one or more connecting zones.
  • These covers are important for the aesthetic finish of the box.
  • the connection areas are potentially visible given the advantageous geometry of the box.
  • the section of the free end of at least one of the lateral parts of one or the first and second elements comprises a shoulder so that the end of the lateral part corresponding to the other of the first and second elements (10, 12) or the third or fourth element intended to be connected thereto can bear on said lateral part with alignment of the outer surfaces of said lateral part and of said part lateral section or third or fourth element.
  • the shoulder allows easy mounting to ensure alignment of the outer surfaces.
  • a shoulder can be envisaged only in the presence of a U-section element, which confirms the advantage of this geometry.
  • the shoulder is made by a superposition and fixing preferably by gluing a portion of fireproof material panel on the panel portion forming the lateral portion of one or the first and second elements.
  • the superimposed panel portion forming the shoulder is of a thickness and a material such that they allow the holding of a screw in the thickness of said panel.
  • the first and / or second element comprises an outer metal finishing sheet also partially covering the shoulder. This measure allows a fixing of the element via the metal sheet covering it. This results in a stable attachment of the element.
  • the finishing metal sheet comprises at its end partially covering the shoulder a first stair-shaped section corresponding to the shoulder, followed preferably by a second angular section ending in a free edge so that the free edge of the sheet penetrates a groove of the fire resistant panel portion for receiving the corresponding side portion of the other of the first and second members or the third or fourth member.
  • At least one of the lateral parts of at least one of the first and second elements and / or the third and / or fourth element comprises an external metal finishing sheet comprising, at least one of the connecting edges with the first or second element, a stepped section so as to have a free flat edge extending in the general plane of the element and intended to come into contact with the lower bearing of the first section; staircase shape of the metal sheet of the first or second element.
  • This superposition of sheet metal sections is ideal for fixing.
  • the lower bearing of the step section of the metal sheet of the first or second element and / or the free flat edge of the metal sheet of one of the lateral parts of at least one first and second elements and / or the third and / or fourth element comprises at least one hole intended to receive at least one screw, preferably of the self-tapping type.
  • the holes allow precise relative positioning of the elements and hence a simpler editing.
  • the metal cap (s) have a U-shaped section so as to be able to be inserted via the branches of the U into the rectangular section volume formed by the shoulder.
  • the box would comprise a first and a second generally U-shaped section element with a central portion corresponding to the hollow of the U and two side portions corresponding to the branches of the U, and intended to be arranged vis-à-vis to marry the beam and that the side parts meet respectively.
  • the section of the free end of at least one lateral portion of one or the first and second elements comprises a shoulder so that the free end of the opposite lateral part intended to be connected can bear on said side portion via the shoulder with alignment of the outer surfaces of said side portion and said opposite side portion.
  • the figure 1 illustrates a sectional view of a building metal beam, the beam being dressed by a box according to a first embodiment of the invention.
  • the figure 2 illustrates a sectional view of a building metal beam, the beam being dressed by a box according to a second embodiment of the invention.
  • a metal beam 4 of the HEA type commonly used in the field of buildings is illustrated in FIG. figure 1 by a cross-sectional view.
  • the beam 4 comprises a core 6 and two flanges 8.
  • the main beams encountered on a building structure are of the type: HEA, HEB, IPN, IPE, IPN, UAP.
  • the shape of the beam is designated by the first letter of its name:
  • H H-shaped beam.
  • the HEA sections are approximately in a rectangle (a sole of width substantially greater than the height of the profile).
  • the HEB sections have a profile and a sole of equal dimensions. For these two beams, all angles are sharp, except for the re-entrant angles.
  • the beams 1 have a sole width equal to about half the height of the profile.
  • the wings of the IPN profiles are of variable thickness (non-parallel edges), those of the IPEs are parallel.
  • U U-shaped beam.
  • the wings of the UAP profiles are parallel.
  • an IPN 120 beam has a profile height of 120 mm.
  • a casing box 2 surrounds the beam 4. It has a rectangular section matching or at least approximately corresponding to the rectangular envelope of the section of the beam. It is usually constructed of fire-resistant panels and finished with a sheet metal finish.
  • the panels are typically made of cellular materials based on flame retarded cellulosic materials, particulate materials or flame retarded plant-based fibers, based on mineral products (such as asbestos cement, plaster foams or cement), asbestos, plaster, expanded agile or vermiculite.
  • the connection between the metal sheets and the panels is ensured by gluing. Other connecting means known to those skilled in the art are also conceivable.
  • the panels are made of silicate mineral fibers or fibro-silicate, such as FIBRODICE MS® which is a panel based on magnesium silicate reinforced.
  • Silicates are salts derived from silica (SiO2), they are minerals whose skeleton is essentially formed by silicon and oxygen tetrahedra supplemented with aluminum, magnesium, iron, calcium, potassium, sodium and other elements ( it should be noted that asbestos refers to a family of silicates having a fibrillar structure and having mechanical and insulating properties which justified its industrial use).
  • Panels based on calcium silicates self-claved and optionally reinforced with mineral fibers or cellulose are commercially available. They may have different thicknesses, typically between 6 and 25 mm, preferably between 9 and 12 mm.
  • the metal sheet is ideally Aluzinc® which is a flat steel product coated with an alloy composed of 55% aluminum, 43.4% zinc and 1.6% silicon. Aluzinc® is available in mild steel grades for cold forming and stamping as well as strength steels. It has an aesthetic appearance due to its characteristic silver color.
  • the metal sheet has a thickness which is a function of the various parameters such as the width of the panels and the grade of the steel. Typically the thickness will be in a range from 0.2 mm to 2 mm. Other types of metal sheets are of course possible.
  • the casing 4 comprises four elements, namely two elements 10 and 12 of U-shaped section and two element 20, 22 of generally straight section intended to be fixed to the U-shaped elements.
  • Each element 10 and 12 of U-shaped section comprises a central portion 14 intended to be disposed along a sole 8 of a beam section H or 1 or, for example, a wing of a beam section U.
  • a side portion 18 is disposed at each end of the central portion 14 so as to form a U adapted to be placed around the sole 8 without deformation of the element in question.
  • the side portions 18 are on either side of the sole 8 and surround it.
  • the side portions 18 are sufficiently short that to leave free a major part, that is to say at least 50%, preferably at least 60%, of the width of the volume of the beam.
  • the U-shaped section elements are preferably identical or symmetrical with respect to a median axis crossing the core 6 of the beam 4.
  • the central portion 14 is formed by a first panel section 14 and the side portions 18 are formed by panel sections preferably of the same type or at least the same thickness and disposed generally perpendicular to the central portion.
  • the edge of each panel section 18 is disposed on the inner face of the panel 14, at the ends thereof and fixed by gluing. Alternatively, it could be provided that the edges of the central panel 14 are brought into contact with the inner faces of the panel sections 18 forming the side portions.
  • Other assembly methods well known to those skilled in the art are also conceivable.
  • An additional panel section 19 is superimposed on the panel section 18 outwardly offset from the U-shape.
  • the panel section 19 is glued to the side section 18 and forms a stairway at the free end of the lateral part.
  • the panel sections 19 arranged on the same side of the web 6 of the beam and facing each other are able to receive the closing element 20, 22 so that the outer surface of said closure element 22 is aligned with the outer surfaces of the respective lateral portions of the U-shaped section elements.
  • the two panel sections 19 of a U-shaped section box member each form a shoulder on the inner face of the side portion.
  • the distance between the inner faces of the panel sections 19 is less than the width of the sole, as is the case in the figure, it is necessary that there is a minimum clearance between the edges of the sole 8 of the beam and the adjacent internal faces of the side panels 18.
  • This game must allow to pass the inner face of the panel section 19 along one of the two edges of the sole 8, after having previously passed the panel section 19 opposite to the opposite edge of the sole.
  • the minimum clearance corresponds approximately to the shoulder, i.e. in this case to the thickness of the panel section 19.
  • the two panel sections 19 of a U-shaped section member form a shoulder on the outer face of the lateral part, similarly to the inner face and as described in the previous paragraph.
  • This shoulder serves as a connection zone with the element 20 or 22 closing the volume of the beam.
  • the metal sheet 16 covering the outer face of the U-shaped section elements ends at its two free ends at the side portions by a double fold 17 in the form of a staircase so as to marry the shoulder and than by a single fold 21 directed inwards, that is to say towards the core 6 of the beam.
  • This simple fold corresponds to the free edge of the sheet which is inserted in a corresponding groove formed in the outer surface of the panel section 19. This measure allows a satisfactory positioning of the sheet relative to the panel, particularly at the shoulder. where it is more important to ensure good correspondence of the sheet with the panels.
  • the elements (of the box) of cross section 20 and 22 also each comprise a sheet 26 covering the outside of the surface of the corresponding panel portion 24.
  • This sheet 26 forms, similarly to the sheet 16 of the U-shaped section elements, a staircase 27 so as to fit the shoulder created with the panel portions 19 when the element 20 or 22 is put in place on these portions. of panel.
  • the sheet 26 thus has two free edges 29 projecting from the two edges of the panel section 24 directed towards the elements 10 and 12 of U-shaped section.
  • These free edges 29 of the sheet 26 are generally plane and parallel to the surface internal panel 24 and slightly recessed relative thereto so as to come into contact with the sheet section 16 vis-à-vis while ensuring a contact between the edges of the inner face of the panel 24 and outer faces of the panel sections 19 forming the shoulder.
  • the offset between the plane of the inner surface of the panel and the inner surface of the free edge of sheet metal projecting from the edge corresponds approximately to the thickness of the sheet 16 on the zone of contact with the element 20 or 22.
  • a screw 30 of the self-tapping type is put in place through the sheet 26 and the sheet 16 superimposed and screwed into the thickness of the panel section 19. It results from this arrangement easy fixing by means of screwing technique well known. It allows an assembly with adjustment of the constituent elements of the box as well as easy disassembly not involving any damage to the reassembly that will ensue.
  • a plate cover 28, preferably metal of the same nature as the sheets 16 and 26, is inserted into the space formed by the two shoulders.
  • the cache is U-section and is inserted with the branches of the U directed towards the connecting zone, each along one of the two shoulders formed on the one hand with the panel 18 and on the other hand with the panel 24.
  • the cover can thus be mounted with a slight tightening ensuring its maintaining, the outer surface of the central portion of the U-section aligning with the outer surfaces of a straight member 20, or 22 and U-shaped section members 10 and 12.
  • Rigging and / or fixing means may be provided between the beam and the box.
  • the degree of finish of the box is very high especially at corners which are continuous at the sheet and also at the level of the connection areas between the elements, and by means of the U-shaped cover.
  • the box would comprise a first and a second generally U-shaped section element with a central portion corresponding to the hollow of the U and two side portions corresponding to the branches of the U, and intended to be arranged vis-à-vis to marry the beam and that at least two side portions of the first and second elements, respectively, meet.
  • a configuration is illustrated in figure 2 .
  • the section of the free end of at least one lateral portion 18 of one or more of the first and second members 10 and 12 comprises a shoulder so that the free end of the opposite lateral part intended to be connected to it can abut on said lateral portion with alignment of the outer surfaces of said lateral portion and said opposite lateral portion.
  • the construction details of such a box are identical to those described above in relationship with the example of the figure 1 . In this case, the box would have a single junction on one or each of two opposite faces.

Abstract

The device has a casing (2) formed by fire-resistant panels (24) that are covered with metal sheets (16, 26). The casing includes U-shaped sectional elements (10, 12) provided with a central portion (14). The casing has side portions (18) arranged in a manner to utilize a core (6) of a metal girder (4). Ends of the side portions are arranged facing one another by rejoining the U-shaped sectional elements directly or indirectly via straight sectional elements (20, 22). The straight sectional elements are fixed to the U-shaped sectional elements by connecting the side portions with each other. The U-shaped sectional elements and the straight sectional elements are formed of outer finishing metal sheets e.g. Aluzinc(RTM: Alloy Steel Sheet). The metal shields are arranged to cover a connection zone between the U-shaped sectional elements. The metal girder is in I-shape or H-shape.

Description

Domaine techniqueTechnical area

L'invention a trait à un dispositif d'habillage cloisonnement ou encore capotage et de protection contre le feu de poutrelles, plus particulièrement de poutrelles métalliques de bâtiments.The invention relates to a cladding device or partitioning and fire protection of beams, more particularly of metal beams of buildings.

Technique antérieurePrior art

De nombreuses approches pour protéger les poutrelles métalliques de bâtiments contre le feu tout en réalisant un capotage esthétique et pratique ont été développées.Many approaches to protect metal beams of buildings against fire while achieving an aesthetic and practical rollover have been developed.

Le document de brevet GB 1,010,699 divulgue un dispositif d'habillage et de protection contre le feu modulaire. Il consiste en un caisson de section rectangulaire correspondant approximativement à l'enveloppe de la section de la poutrelle (IPE, IPN, HEB, HED, ...) et formé de plusieurs éléments prêts à être assemblés. Ces éléments sont des panneaux correspondants essentiellement aux parois du capotage, ces éléments ayant la particularité d'être pourvus de moyens de fixation rapides et simples. Les éléments sont constitués, chacun, d'un panneau en matériau résistant au feu, comme typiquement de l'asbeste, recouvert d'une feuille métallique de finition. Aux bords de liaison des panneaux, la tôle dépasse et est repliée sur elle-même de manière à former soit un moyen de fixation du type mâle, soit un moyen de fixation du type femelle destiné à coopérer avec un moyen mâle par insertion de ce dernier en vue d'assurer une fixation rapide. Plus précisément, le moyen femelle est une boucle allongée et serrée formée par le pliage de la tôle dépassant du bord d'un des éléments formant le caisson. Une branche de cette boucle comprend une surépaisseur formant un épaulement. Le moyen mâle est formé par le pliage de l'extrémité de la tôle dépassant du bord d'un des éléments formant le caisson de manière à former une surépaisseur avec un épaulement. Les deux épaulements sont destinés à coopérer par accrochage une fois le moyen mâle inséré dans le moyen femelle. Un des éléments formant le caisson peut également présenter une forme de U destinée à entourer l'enveloppe de la poutrelle, sachant qu'un autre élément plan vient alors « fermer » le caisson par des moyens de fixation similaires à ceux décrits ci-avant. Ces moyens de fixation sont très faciles à assembler mais comporte toutefois une série d'inconvénients. En effet, le démontage est assez difficile en raison du fait que les épaulements formés par le pliage des tôles présentent des surfaces abruptes qui accrochent bien lors du montage mais qui sont difficiles à désengager. Il est en effet, souhaitable de pouvoir ouvrir le caisson après montage afin d'avoir accès au volume entre le caisson et le creux de la poutrelle dans lequel des câbles et tuyaux sont souvent logés. De plus, indépendamment des difficultés de démontage de ces moyens de fixation, l'enlèvement d'un des panneaux déstabilise automatiquement le caisson. En effet, chaque élément correspond généralement à une face ou plusieurs faces du caisson, ce qui signifie que les liaisons se font au niveau des arêtes du caisson. Tout enlèvement d'un élément est susceptible de déstabiliser le reste du caisson. En pratique, les bords de liaison du reste du caisson risque de bouger signifiant que le remontage de l'élément sera rendu plus difficile.The patent document GB 1,010,699 discloses a dressing and modular fire protection device. It consists of a box of rectangular section approximately corresponding to the envelope of the section of the beam (IPE, IPN, HEB, HED, ...) and formed of several elements ready to be assembled. These elements are panels corresponding essentially to the walls of the cowling, these elements having the particularity of being provided with fast and simple fastening means. The elements each consist of a fireproof material panel, typically asbestos, covered with a metal sheet finish. At the connecting edges of the panels, the sheet protrudes and is folded back on itself so as to form either a fastening means of the male type, or a female type fixing means intended to cooperate with a male means by insertion of the latter in order to ensure a quick fixation. More specifically, the female means is an elongated and tight loop formed by the folding of the sheet protruding from the edge of one of the elements forming the box. A branch of this loop comprises an extra thickness forming a shoulder. The male means is formed by folding the end of the sheet protruding from the edge of one of the elements forming the box so as to form an extra thickness with a shoulder. The two shoulders are intended to cooperate by hooking once the male means inserted into the female means. One of the elements forming the box may also have a U-shape intended to surround the casing of the beam, knowing that another plane element then comes "close" the box by fastening means similar to those described above. These fastening means are very easy to assemble but have a series of disadvantages. Indeed, disassembly is quite difficult because the shoulders formed by folding sheets have steep surfaces that hang well during assembly but are difficult to disengage. It is indeed desirable to be able to open the box after assembly to have access to the volume between the box and the trough of the beam in which cables and pipes are often housed. In addition, regardless of the difficulty of dismounting these fasteners, the removal of one of the panels automatically destabilizes the box. Indeed, each element generally corresponds to one or more faces of the box, which means that the connections are made at the edges of the box. Any removal of an element is likely to destabilize the rest of the box. In practice, the connecting edges of the rest of the box may move indicating that the winding of the element will be made more difficult.

Le document de brevet US 4,854,107 divulgue un concept de fixation de panneaux d'habillage à une poutrelle métallique de bâtiment. Ces fixations en forme de E et coopérant avec les semelles de la poutrelle permettent une fixation rapide et sûre mais requiert toujours un travail de menuiserie, c'est-à-dire de découpe et ajustage de panneaux, pour habiller la poutrelle et la protéger contre le feu.The patent document US 4,854,107 discloses a concept of fastening cladding panels to a building metal truss. These fixings E-shaped and cooperating with the soles of the beam allow a quick and secure fixation but still requires carpentry work, that is to say cutting and fitting panels, to dress the beam and protect it against fire.

Le document de brevet US 4,279,111 divulgue de manière similaire au document précédent un concept de fixation de panneaux d'habillage à une poutrelle métallique de bâtiment. Ces fixations sont en forme de crochet coopérant avec la tranche de la semelle de la poutrelle. Tout comme pour l'enseignement du document précédent, cette solution requiert toujours un travail de menuiserie, c'est-à-dire de découpe et ajustage de panneaux, pour habiller la poutrelle et la protéger contre le feu.The patent document US 4,279,111 discloses in a similar manner to the previous document a concept of fixing cladding panels to a building metal beam. These fasteners are hook-shaped cooperating with the edge of the sole of the beam. As for the teaching of the previous document, this solution still requires carpentry work, that is to say cutting and fitting panels, to dress the beam and protect it against fire.

L'invention a pour objectif de proposer une solution pour l'habillage et la protection contre le feu de poutrelle notamment métallique de bâtiment palliant au moins un des inconvénients sus mentionnés. Plus particulièrement, l'invention a pour objectif de proposer une solution d'habillage et de protection contre de feu de poutrelles qui est esthétique, facile à mettre en oeuvre, bon marché et permettant un accès facile au volume de la poutrelle pour les travaux d'installation et de maintenance de câbles et tuyauterie.The object of the invention is to propose a solution for the cladding and the protection against the fire of a particular metal building truss overcoming at least one of the abovementioned disadvantages. More In particular, the object of the invention is to provide a solution for covering and protection against log fire which is aesthetic, easy to implement, inexpensive and allowing easy access to the volume of the beam for the work of installation and maintenance of cables and piping.

Résumé de l'inventionSummary of the invention

L'invention consiste en un dispositif d'habillage et de protection contre le feu d'une poutrelle notamment métallique, comprenant un caisson de panneaux en matériau résistant au feu recouvert d'une feuille métallique; le caisson comprenant un premier et un deuxième élément de section généralement en U avec une partie centrale correspondant au creux du U et deux parties latérales correspondant aux branches du U, et destinés à être disposés en vis-à-vis de manière à épouser deux faces opposées de la poutrelle et de manière à ce que les extrémités d'au moins deux des parties latérales des premier et deuxième éléments, respectivement, disposées en vis-à-vis, se rejoignent directement, ou indirectement via un troisième élément de section généralement droite et destiné à être fixé au premier et au deuxième élément en reliant entre elles les deux parties latérales et disposées en vis-à-vis.The invention consists of a covering device and fire protection of a beam including metal, comprising a panel of fire resistant material covered with a metal sheet; the box comprising a first and a second element of generally U-shaped section with a central portion corresponding to the hollow of the U and two side portions corresponding to the branches of the U, and intended to be arranged vis-à-vis so as to marry both sides opposing the beam and so that the ends of at least two of the side portions of the first and second elements, respectively, arranged vis-à-vis, meet directly or indirectly via a third element of generally straight section and intended to be fixed to the first and second elements by interconnecting the two lateral parts and arranged vis-à-vis.

L'utilisation de deux éléments de section en U disposés en vis-à-vis, éventuellement complétés par au moins un élément plan reliant les deux éléments en U au moins d'un côté du U est particulièrement avantageuse. Elle confère au caisson une plus grande rigidité et rend le montage plus facile. Les éléments en U peuvent être mis en place par rapport à la poutrelle par des moyens de calage simples. Le ou les éléments plans venant fermer le caisson en reliant les deux éléments en U d'un ou des deux côtés, peuvent être mis en place aisément et garantissent un accès au volume de la poutrelle réservé par exemple à des conduites et/ou des câbles électriques. De plus, les éléments de section en U peuvent être dimensionnés pour une largeur de poutrelle donnée, indépendamment de la section de poutrelle, les éléments plans et beaucoup plus simples peuvent être exécutés dans différentes dimensions de manière à correspondre aux différentes hauteurs de poutrelles courantes. Il résulte une construction modulaire permettant d'habiller des poutrelles de dimensions différentes sans requérir systématiquement des éléments de dimensions spécifiques.The use of two U-shaped section elements arranged vis-à-vis, possibly supplemented by at least one plane element connecting the two U-shaped elements at least on one side of the U is particularly advantageous. It gives the box a greater rigidity and makes mounting easier. The U-shaped elements can be put in place with respect to the beam by simple wedging means. The flat element or elements coming to close the box by connecting the two U-shaped elements on one or both sides, can be easily set up and guarantee access to the volume of the beam reserved for example for pipes and / or cables electric. In addition, the U-section elements can be dimensioned for a given beam width, regardless of the beam section, the planar and much simpler elements can be executed in different dimensions so as to correspond to the different heights of common beams. It results a modular construction to dress beams of different dimensions without systematically requiring specific dimensions elements.

Selon un mode avantageux de l'invention, le caisson comprend un quatrième élément de section généralement droite et destiné à être fixé au premier et au deuxième élément du côté opposé au troisième élément en reliant entre elles deux parties latérales des premier et deuxième éléments, respectivement, et disposées en vis-à-vis. La présence d'un deuxième élément plan est indiquée pour les poutrelles dont la section comporte deux volumes opposés, comme typiquement une section en H. Dans le cas d'une poutrelle de section en U qui ne comporte qu'un seul volume d'un seul côté, il n'est pas nécessaire d'avoir deux élément plans de fermeture. En effet, les deux éléments du caisson et de section en U peuvent présenter, chacun, une branche du U destinée à être relié à la branche en vis-à-vis de l'autre élément une fois mis en place autour de la poutrelle, et ce du côté de l'âme de la poutrelle. Un seul élément plan de fermeture est alors disposé de l'autre côté reliant les deux éléments de section en U et ferment le volume de la section de la poutrelle.According to an advantageous embodiment of the invention, the box comprises a fourth element of generally straight section and intended to be fixed to the first and the second element on the opposite side to the third element by interconnecting two lateral parts of the first and second elements, respectively , and arranged vis-à-vis. The presence of a second planar element is indicated for the beams whose section comprises two opposite volumes, as typically a section in H. In the case of a U-section beam which comprises only one volume of a only side, it is not necessary to have two elements closure planes. Indeed, the two elements of the box and section U can each have a branch of the U to be connected to the branch vis-à-vis the other element once set up around the beam, and this on the side of the soul of the beam. A single closure plane element is then arranged on the other side connecting the two U-section elements and close the volume of the section of the beam.

Selon un autre mode avantageux de l'invention, d'une part les premier et deuxième éléments, et d'autre part le troisième et/ou le quatrième éléments, comprennent des moyens de fixation mutuelle tels que ces derniers sont mis en correspondance par un simple mouvement d'approche du troisième et/ou du quatrième élément vers les premier et deuxième éléments. Cette mesure présente l'avantage de permettre un montage et également un démontage aisé des éléments de fermeture, en particulier par rapport à l'enseignement de GB 1,010,699 discuté ci-avant, ce qui facilite les opérations de maintenance nécessitant un accès au volume de la poutrelle ainsi habillée par le caisson.According to another advantageous embodiment of the invention, on the one hand the first and second elements, and on the other hand the third and / or fourth elements, comprise mutual fixing means such that the latter are matched by a simple approach movement of the third and / or fourth element to the first and second elements. This measure has the advantage of allowing assembly and also easy dismantling of the closure elements, in particular with respect to the teaching of GB 1,010,699 discussed above, which facilitates maintenance operations requiring access to the volume of the beam and dressed by the box.

Selon un encore autre mode avantageux de l'invention, le dispositif comprend au moins au moins un, préférentiellement deux ou quatre caches métalliques (28) destinés à couvrir la ou les zones de liaison directe entre le premier et le deuxième élément (10, 12) et/ou entre le ou les premier et deuxième élément (10, 12) et le ou les troisième et quatrième éléments (20, 22) et, préférentiellement de manière à affleurer avec les surfaces extérieures desdits éléments de part et d'autre de la ou des zones de liaison. Ces caches sont importants pour la finition esthétique du caisson. Les zones de liaison sont potentiellement visibles compte tenu de la géométrie avantageuse du caisson.According to yet another advantageous embodiment of the invention, the device comprises at least at least one, preferably two or four metal caps (28) intended to cover the direct connection zone (s) between the first and the second element (10, 12). ) and / or between the first and second element (s) (10, 12) and the third fourth elements (20, 22) and preferably flush with the outer surfaces of said elements on either side of the one or more connecting zones. These covers are important for the aesthetic finish of the box. The connection areas are potentially visible given the advantageous geometry of the box.

Selon un encore autre mode avantageux de l'invention, la section de l'extrémité libre d'au moins une des parties latérales d'un ou des premier et deuxième éléments comprend un épaulement de manière à ce que l'extrémité de la partie latérale correspondante de l'autre des premier et deuxième éléments (10, 12) ou le troisième ou quatrième élément destiné(e) à y être relié puisse venir en appui sur ladite partie latérale avec alignement des surfaces extérieures de ladite partie latérale et de ladite partie latérale correspondante ou dudit troisième ou quatrième élément. L'épaulement permet un montage aisé garantissant un alignement des surfaces extérieures. Un épaulement n'est envisageable qu'en présence d'un élément de section en U, ce qui confirme l'avantage de cette géométrie.According to yet another advantageous embodiment of the invention, the section of the free end of at least one of the lateral parts of one or the first and second elements comprises a shoulder so that the end of the lateral part corresponding to the other of the first and second elements (10, 12) or the third or fourth element intended to be connected thereto can bear on said lateral part with alignment of the outer surfaces of said lateral part and of said part lateral section or third or fourth element. The shoulder allows easy mounting to ensure alignment of the outer surfaces. A shoulder can be envisaged only in the presence of a U-section element, which confirms the advantage of this geometry.

Selon un encore autre mode avantageux de l'invention, l'épaulement est réalisé par une superposition et fixation préférentiellement par collage d'une portion de panneau en matériau résistant au feu sur la portion de panneau formant la partie latérale d'un ou des premier et deuxième éléments. La réalisation de l'épaulement avec le même type de panneau que les éléments constitutifs du caisson, renforce la protection contre le feu du caisson tout en restant très simple à mettre en oeuvre.According to yet another advantageous embodiment of the invention, the shoulder is made by a superposition and fixing preferably by gluing a portion of fireproof material panel on the panel portion forming the lateral portion of one or the first and second elements. The realization of the shoulder with the same type of panel as the constituent elements of the box, reinforces the fire protection of the box while remaining very simple to implement.

Selon un encore autre mode avantageux de l'invention, la portion de panneau superposée formant l'épaulement est d'une épaisseur et d'un matériau tels qu'ils permettent la tenue d'une vis dans l'épaisseur dudit panneau. L'utilisation de vis, plus particulièrement de vis auto taraudeuses rend la construction du caisson assez simple et permet un démontage aisé d'un élément de fermeture.According to yet another advantageous embodiment of the invention, the superimposed panel portion forming the shoulder is of a thickness and a material such that they allow the holding of a screw in the thickness of said panel. The use of screws, more particularly self-tapping screws makes the construction of the box quite simple and allows easy removal of a closure element.

Selon un encore autre mode avantageux de l'invention, le premier et/ou le deuxième élément comprend une tôle métallique extérieure de finition recouvrant également partiellement l'épaulement. Cette mesure permet une fixation de l'élément via la tôle métallique le recouvrant. Il en résulte une fixation stable de l'élément.According to yet another advantageous embodiment of the invention, the first and / or second element comprises an outer metal finishing sheet also partially covering the shoulder. This measure allows a fixing of the element via the metal sheet covering it. This results in a stable attachment of the element.

Selon un encore autre mode avantageux de l'invention, la tôle métallique de finition comprend à son extrémité recouvrant partiellement l'épaulement une première section en forme d'escalier correspondant à l'épaulement, suivie préférentiellement d'une seconde section angulaire se terminant par un bord libre de manière à ce que le bord libre de la tôle pénètre une rainure de la portion de panneau résistant au feu destinée à recevoir la partie latérale correspondante de l'autre des premier et deuxième éléments ou le troisième ou quatrième élément. Cette mesure permet un positionnement précis au niveau de l'épaulement, de la tôle métallique recouvrant l'élément de section en U.According to another advantageous embodiment of the invention, the finishing metal sheet comprises at its end partially covering the shoulder a first stair-shaped section corresponding to the shoulder, followed preferably by a second angular section ending in a free edge so that the free edge of the sheet penetrates a groove of the fire resistant panel portion for receiving the corresponding side portion of the other of the first and second members or the third or fourth member. This measurement allows precise positioning at the shoulder, of the metal sheet covering the U-section element.

Selon un encore autre mode avantageux de l'invention, au moins une des parties latérales d'au moins un des premier et deuxième éléments et/ou le troisième et/ou le quatrième élément comprend une tôle métallique extérieure de finition comprenant, à au moins un des bords de liaison avec le premier ou deuxième élément, une section en escalier de manière à présenter un bord plat libre s'étendant dans le plan général de l'élément et destiné à venir en contact avec le palier inférieur de la première section en forme d'escalier de la tôle métallique du premier ou deuxième élément. Cette superposition de sections de tôle métallique est idéale pour la fixation.According to yet another advantageous embodiment of the invention, at least one of the lateral parts of at least one of the first and second elements and / or the third and / or fourth element comprises an external metal finishing sheet comprising, at least one of the connecting edges with the first or second element, a stepped section so as to have a free flat edge extending in the general plane of the element and intended to come into contact with the lower bearing of the first section; staircase shape of the metal sheet of the first or second element. This superposition of sheet metal sections is ideal for fixing.

Selon un encore autre mode avantageux de l'invention, le palier inférieur de la section en escalier de la tôle métallique du premier ou deuxième élément et/ou le bord plat libre de la tôle métallique d'une des parties latérales d'au moins un des premier et deuxième éléments et/ou du troisième et/ou quatrième élément comprend au moins un trou destiné à recevoir au moins une vis, préférentiellement du type auto taraudeuse. Les trous permettent un positionnement relatif précis des éléments et, partant, un montage rendu plus simple.According to yet another advantageous embodiment of the invention, the lower bearing of the step section of the metal sheet of the first or second element and / or the free flat edge of the metal sheet of one of the lateral parts of at least one first and second elements and / or the third and / or fourth element comprises at least one hole intended to receive at least one screw, preferably of the self-tapping type. The holes allow precise relative positioning of the elements and hence a simpler editing.

Selon un encore autre mode avantageux de l'invention, le ou les caches métalliques ont une section en forme de U de manière à pouvoir être insérés via les branches du U dans le volume de section rectangulaire formé par l'épaulement.According to yet another advantageous embodiment of the invention, the metal cap (s) have a U-shaped section so as to be able to be inserted via the branches of the U into the rectangular section volume formed by the shoulder.

Il est à noter qu'un des éléments de section droite ou ces deux éléments ne sont pas nécessaires si un accès au volume de la poutrelle n'est pas désiré. Dans ce cas, le caisson comprendrait un premier et un deuxième élément de section généralement en U avec une partie centrale correspondant au creux du U et deux parties latérales correspondant aux branches du U, et destinés à être disposés en vis-à-vis de manière à épouser la poutrelle et à ce que les parties latérales se rejoignent respectivement. La section de l'extrémité libre d'au moins une partie latérale d'un ou des premier et deuxième éléments comprend un épaulement de manière à ce que l'extrémité libre de la partie latérale opposée destiné à y être reliée puisse venir en appui sur ladite partie latérale via l'épaulement avec alignement des surfaces extérieures de ladite partie latérale et de ladite partie latérale opposée. Les détails de constructions d'un tel caisson sont identiques à ceux décrits ci-avant.It should be noted that one of the elements of cross section or these two elements are not necessary if an access to the volume of the beam is not desired. In this case, the box would comprise a first and a second generally U-shaped section element with a central portion corresponding to the hollow of the U and two side portions corresponding to the branches of the U, and intended to be arranged vis-à-vis to marry the beam and that the side parts meet respectively. The section of the free end of at least one lateral portion of one or the first and second elements comprises a shoulder so that the free end of the opposite lateral part intended to be connected can bear on said side portion via the shoulder with alignment of the outer surfaces of said side portion and said opposite side portion. The construction details of such a box are identical to those described above.

Brève description des dessinsBrief description of the drawings

La figure 1 illustre une vue en coupe d'une poutrelle métallique de bâtiment, la poutrelle étant habillée par un caisson selon un premier mode de réalisation de l'invention.The figure 1 illustrates a sectional view of a building metal beam, the beam being dressed by a box according to a first embodiment of the invention.

La figure 2 illustre une vue en coupe d'une poutrelle métallique de bâtiment, la poutrelle étant habillée par un caisson selon un second mode de réalisation de l'invention.The figure 2 illustrates a sectional view of a building metal beam, the beam being dressed by a box according to a second embodiment of the invention.

Description des modes de réalisationDescription of the embodiments

Une poutrelle métallique 4 du type HEA couramment utilisée dans le domaine des bâtiments est illustrée à la figure 1 par une vue en coupe transversale. La poutrelle 4 comporte une âme 6 et deux semelles 8.A metal beam 4 of the HEA type commonly used in the field of buildings is illustrated in FIG. figure 1 by a cross-sectional view. The beam 4 comprises a core 6 and two flanges 8.

Les principales poutrelles rencontrées sur une structure de bâtiment sont de type : HEA, HEB, IPN, IPE, IPN, UAP. La forme de la poutrelle est désignée par la première lettre de son appellation :The main beams encountered on a building structure are of the type: HEA, HEB, IPN, IPE, IPN, UAP. The shape of the beam is designated by the first letter of its name:

H: poutrelle en forme de H. Les sections HEA s'inscrivent approximativement dans un rectangle (semelle de largeur sensiblement supérieure à la hauteur du profil). Les sections HEB ont un profil et une semelle d'égales dimensions. Pour ces deux poutrelles, tous les angles sont vifs, à l'exception des angles rentrants.H: H-shaped beam. The HEA sections are approximately in a rectangle (a sole of width substantially greater than the height of the profile). The HEB sections have a profile and a sole of equal dimensions. For these two beams, all angles are sharp, except for the re-entrant angles.

l: poutrelle en forme de l. Les poutrelles l ont une largeur de semelle égale à environ la moitié de la hauteur du profil. Les ailes des profils IPN sont d'épaisseurs variables (bords non parallèles), celles des IPE sont parallèles.l: l-shaped beam. The beams 1 have a sole width equal to about half the height of the profile. The wings of the IPN profiles are of variable thickness (non-parallel edges), those of the IPEs are parallel.

U: poutrelle en forme de U. Les ailes des profils UAP sont parallèles.U: U-shaped beam. The wings of the UAP profiles are parallel.

On désigne toutes ces poutrelles par la hauteur. Par exemple, une poutrelle IPN 120 a une hauteur de profil de 120 mm.All these beams are designated by the height. For example, an IPN 120 beam has a profile height of 120 mm.

Un caisson d'habillage 2 entoure la poutrelle 4. Il présente une section rectangulaire épousant ou du moins correspondant approximativement à l'enveloppe rectangulaire de la section de la poutrelle. Il est généralement construit en panneaux résistants au feu et recouverts d'une tôle métallique de finition. Les panneaux sont typiquement faits de matériaux alvéolés à base de matières cellulosiques ignifugées, de matériaux à base de particules ou de fibres d'origine végétale ignifugées, à base de produits minéraux (tels que de l'amiante-ciment, des mousses de plâtre ou de ciment), de l'amiante, du plâtre, de l'agile expansée ou de la vermiculite. La liaison entre les tôles métallique et les panneaux est assurée par collage. D'autres moyens de liaison connus de l'homme de métier sont également envisageables.A casing box 2 surrounds the beam 4. It has a rectangular section matching or at least approximately corresponding to the rectangular envelope of the section of the beam. It is usually constructed of fire-resistant panels and finished with a sheet metal finish. The panels are typically made of cellular materials based on flame retarded cellulosic materials, particulate materials or flame retarded plant-based fibers, based on mineral products (such as asbestos cement, plaster foams or cement), asbestos, plaster, expanded agile or vermiculite. The connection between the metal sheets and the panels is ensured by gluing. Other connecting means known to those skilled in the art are also conceivable.

Idéalement les panneaux sont en fibres minérales silicates ou encore fibro-silicate, comme par exemple du FIBRODICE MS® qui est un panneau à base de silicate de magnésium renforcé. Les silicates sont des sels dérivant de la silice (Si02), ils sont des minéraux dont le squelette est essentiellement formé par des tétraèdres de Silicium et d'Oxygène additionnés d'aluminium, magnésium, fer, calcium, potassium, sodium et autres éléments (il est à noter que l'amiante désigne une famille de silicates ayant une structure fibrillaire et dotés de propriétés mécaniques et d'isolation qui ont justifié son usage industriel). Des panneaux à base de silicates de calcium auto clavées et éventuellement renforcées de fibres minérales ou de cellulose sont disponibles dans le commerce. Ils peuvent avoir différentes épaisseurs, typiquement entre 6 et 25 mm, préférentiellement entre 9 et 12 mm.Ideally the panels are made of silicate mineral fibers or fibro-silicate, such as FIBRODICE MS® which is a panel based on magnesium silicate reinforced. Silicates are salts derived from silica (SiO2), they are minerals whose skeleton is essentially formed by silicon and oxygen tetrahedra supplemented with aluminum, magnesium, iron, calcium, potassium, sodium and other elements ( it should be noted that asbestos refers to a family of silicates having a fibrillar structure and having mechanical and insulating properties which justified its industrial use). Panels based on calcium silicates self-claved and optionally reinforced with mineral fibers or cellulose are commercially available. They may have different thicknesses, typically between 6 and 25 mm, preferably between 9 and 12 mm.

La tôle métallique est idéalement en Aluzinc® qui est un produit plat en acier revêtu d'un alliage composé de 55% d'aluminium, de 43,4% de zinc et 1,6% de silicium. L'Aluzinc® est disponible en qualités d'aciers doux pour formage à froid et emboutissage ainsi qu'en aciers de résistance. Il présente un aspect esthétique dû à son fleurage caractéristique de couleur argent. La tôle métallique présente une épaisseur qui est fonction des divers paramètres comme par exemple la largeur des panneaux et la nuance de l'acier. Typiquement l'épaisseur va se situer dans une plage allant de 0.2 mm à 2 mm. D'autres types de tôles métalliques sont bien sûr possibles.The metal sheet is ideally Aluzinc® which is a flat steel product coated with an alloy composed of 55% aluminum, 43.4% zinc and 1.6% silicon. Aluzinc® is available in mild steel grades for cold forming and stamping as well as strength steels. It has an aesthetic appearance due to its characteristic silver color. The metal sheet has a thickness which is a function of the various parameters such as the width of the panels and the grade of the steel. Typically the thickness will be in a range from 0.2 mm to 2 mm. Other types of metal sheets are of course possible.

Le caisson 4 comprend quatre éléments, à savoir deux éléments 10 et 12 de section en forme de U et deux élément 20, 22 de section généralement droite destinés à être fixés aux éléments en U. Chaque élément 10 et 12 de section en forme de U comprend une partie centrale 14 destinée à être disposée le long d'une semelle 8 d'une poutrelle en section en H ou l ou encore, par exemple, d'une aile d'une poutrelle de section en U. Une partie latérale 18 est disposée à chaque extrémité de la partie centrale 14 de manière à former un U apte à être mis en place autour de la semelle 8 sans déformation de l'élément en question. Les parties latérales 18 sont de part et d'autre de la semelle 8 et la contournent. Les parties latérales 18 sont suffisamment courtes que pour laisser libre une majeure partie, c'est-à-dire au moins 50%, préférentiellement au moins 60%, de la largeur du volume de la poutrelle. Les éléments de section en forme de U sont préférentiellement identiques ou symétriques par rapport à un axe médian traversant l'âme 6 de la poutrelle 4.The casing 4 comprises four elements, namely two elements 10 and 12 of U-shaped section and two element 20, 22 of generally straight section intended to be fixed to the U-shaped elements. Each element 10 and 12 of U-shaped section comprises a central portion 14 intended to be disposed along a sole 8 of a beam section H or 1 or, for example, a wing of a beam section U. A side portion 18 is disposed at each end of the central portion 14 so as to form a U adapted to be placed around the sole 8 without deformation of the element in question. The side portions 18 are on either side of the sole 8 and surround it. The side portions 18 are sufficiently short that to leave free a major part, that is to say at least 50%, preferably at least 60%, of the width of the volume of the beam. The U-shaped section elements are preferably identical or symmetrical with respect to a median axis crossing the core 6 of the beam 4.

La partie centrale 14 est formée par une première section de panneau 14 et les parties latérales 18 sont formées par des sections de panneau préférentiellement du même type ou à tout le moins de la même épaisseur et disposés généralement perpendiculairement par rapport à la partie centrale. Le chant de chaque section de panneau 18 est disposé sur la face interne du panneau 14, aux extrémités de celle-ci et fixé par collage. Alternativement, on pourrait prévoir que les chants du panneau central 14 soient mis en contact avec les faces internes des sections de panneau 18 formant les parties latérales. D'autres modes d'assemblage bien connus de l'homme de métier sont également envisageables.The central portion 14 is formed by a first panel section 14 and the side portions 18 are formed by panel sections preferably of the same type or at least the same thickness and disposed generally perpendicular to the central portion. The edge of each panel section 18 is disposed on the inner face of the panel 14, at the ends thereof and fixed by gluing. Alternatively, it could be provided that the edges of the central panel 14 are brought into contact with the inner faces of the panel sections 18 forming the side portions. Other assembly methods well known to those skilled in the art are also conceivable.

Une section de panneau supplémentaire 19 est superposée à la section de panneau 18 de manière décalée vers l'extérieur de la forme en U. La section de panneau 19 est fixée par collage à la section latérale 18 et forme un escalier à l'extrémité libre de la partie latérale. Les sections de panneau 19 disposés du même côté de l'âme 6 de la poutrelle et en vis-à-vis sont aptes à recevoir l'élément de fermeture 20, 22 de manière à ce que la surface extérieure dudit élément de fermeture 22 soit alignée avec les surfaces extérieures des parties latérales respectives des éléments de section en forme de U.An additional panel section 19 is superimposed on the panel section 18 outwardly offset from the U-shape. The panel section 19 is glued to the side section 18 and forms a stairway at the free end of the lateral part. The panel sections 19 arranged on the same side of the web 6 of the beam and facing each other are able to receive the closing element 20, 22 so that the outer surface of said closure element 22 is aligned with the outer surfaces of the respective lateral portions of the U-shaped section elements.

Les deux sections de panneau 19 d'un élément du caisson de section en forme de U forment, chacune, un épaulement sur la face interne de la partie latérale. Lorsque la distance entre les faces internes des sections de panneau 19 est inférieure à la largeur de la semelle, comme c'est le cas sur la figure, il est nécessaire qu'il existe un jeu minimum entre les chants de la semelle 8 de la poutrelle et les faces internes adjacentes des panneaux latéraux 18. Ce jeu doit permettre de faire passer la face interne de la section de panneau 19 le long d'un des deux chants de la semelle 8, après avoir préalablement fait passer la section de panneau 19 opposée au-delà du chant opposé de la semelle. Le jeu minimum correspond approximativement à l'épaulement, c'est-à-dire dans ce cas ci à l'épaisseur de la section de panneau 19.The two panel sections 19 of a U-shaped section box member each form a shoulder on the inner face of the side portion. When the distance between the inner faces of the panel sections 19 is less than the width of the sole, as is the case in the figure, it is necessary that there is a minimum clearance between the edges of the sole 8 of the beam and the adjacent internal faces of the side panels 18. This game must allow to pass the inner face of the panel section 19 along one of the two edges of the sole 8, after having previously passed the panel section 19 opposite to the opposite edge of the sole. The minimum clearance corresponds approximately to the shoulder, i.e. in this case to the thickness of the panel section 19.

Les deux sections de panneau 19 d'un élément (du caisson) de section en forme de U forment un épaulement sur la face externe de la partie latérale, similairement à la face interne et tel que décrit au paragraphe précédent. Cet épaulement sert de zone de liaison avec l'élément 20 ou 22 de fermeture du volume de la poutrelle. En effet, la tôle métallique 16 recouvrant la face extérieure des éléments de section en forme de U se termine à ses deux extrémités libres au niveau des parties latérales par un double pli 17 en forme d'escalier de manière à épouser l'épaulement ainsi que par un pli simple 21 dirigé vers l'intérieur, c'est-à-dire vers l'âme 6 de la poutrelle. Ce pli simple correspond au bord libre de la tôle qui est inséré dans une rainure correspondante pratiquée dans la surface extérieure de la section de panneau 19. Cette mesure permet un positionnement satisfaisant de la tôle par rapport au panneau en particulier au niveau de l'épaulement où il est d'avantage important d'assurer une bonne correspondance de la tôle avec les panneaux.The two panel sections 19 of a U-shaped section member (box) form a shoulder on the outer face of the lateral part, similarly to the inner face and as described in the previous paragraph. This shoulder serves as a connection zone with the element 20 or 22 closing the volume of the beam. Indeed, the metal sheet 16 covering the outer face of the U-shaped section elements ends at its two free ends at the side portions by a double fold 17 in the form of a staircase so as to marry the shoulder and than by a single fold 21 directed inwards, that is to say towards the core 6 of the beam. This simple fold corresponds to the free edge of the sheet which is inserted in a corresponding groove formed in the outer surface of the panel section 19. This measure allows a satisfactory positioning of the sheet relative to the panel, particularly at the shoulder. where it is more important to ensure good correspondence of the sheet with the panels.

Les éléments (du caisson) de section droite 20 et 22 comprennent également, chacun, une tôle 26 recouvrant à l'extérieur la surface de la portion de panneau 24 correspondante. Cette tôle 26 forme, pareillement à la tôle 16 des éléments de section en forme de U, un escalier 27 de manière à épouser l'épaulement créé avec les portions de panneau 19 lorsque l'élément 20 ou 22 est mise en place sur ces portions de panneau. La tôle 26 présente ainsi deux bords libres 29 en saillie des deux bords de la section de panneau 24 dirigés vers les éléments 10 et 12 de section en forme de U. Ces bords libres 29 de la tôle 26 sont généralement plans et parallèles à la surface interne du panneau 24 et légèrement en retrait par rapport à celle-ci de manière à pouvoir venir en contact avec la section de tôle 16 en vis-à-vis tout en assurant une mise en contact des bords de la face interne du panneau 24 et des faces externes des sections de panneau 19 formant l'épaulement. Le décalage entre le plan de la surface interne du panneau et la surface interne du bord libre de tôle en saillie du bord correspond approximativement à l'épaisseur de la tôle 16 sur la zone de contact avec l'élément 20 ou 22.The elements (of the box) of cross section 20 and 22 also each comprise a sheet 26 covering the outside of the surface of the corresponding panel portion 24. This sheet 26 forms, similarly to the sheet 16 of the U-shaped section elements, a staircase 27 so as to fit the shoulder created with the panel portions 19 when the element 20 or 22 is put in place on these portions. of panel. The sheet 26 thus has two free edges 29 projecting from the two edges of the panel section 24 directed towards the elements 10 and 12 of U-shaped section. These free edges 29 of the sheet 26 are generally plane and parallel to the surface internal panel 24 and slightly recessed relative thereto so as to come into contact with the sheet section 16 vis-à-vis while ensuring a contact between the edges of the inner face of the panel 24 and outer faces of the panel sections 19 forming the shoulder. The offset between the plane of the inner surface of the panel and the inner surface of the free edge of sheet metal projecting from the edge corresponds approximately to the thickness of the sheet 16 on the zone of contact with the element 20 or 22.

Une vis 30 du type auto taraudeuse est mise en place au travers de la tôle 26 et de la tôle 16 superposées et vissée dans l'épaisseur de la section de panneau 19. Il résulte de cet agencement une fixation aisée au moyen de technique de vissage bien connue. Elle permet un montage avec ajustement des éléments constitutifs du caisson ainsi qu'un démontage facile ne portant aucun préjudice au remontage qui s'ensuivra.A screw 30 of the self-tapping type is put in place through the sheet 26 and the sheet 16 superimposed and screwed into the thickness of the panel section 19. It results from this arrangement easy fixing by means of screwing technique well known. It allows an assembly with adjustment of the constituent elements of the box as well as easy disassembly not involving any damage to the reassembly that will ensue.

Un cache 28 en tôle, préférentiellement métallique de la même nature que les tôles 16 et 26, est inséré dans l'espace formé par les deux épaulements. Le cache est de section en U et il est inséré avec les branches du U dirigée vers la zone de liaison, chacune le long d'un des deux épaulements formés d'une part avec le panneau 18 et d'autre part avec le panneau 24. Le cache peut ainsi être monté avec un léger serrage assurant son maintien, la surface extérieure de la partie centrale de la section en U s'alignant avec les surfaces extérieures d'un élément droit 20, ou 22 et des éléments 10 et 12 de section en forme de U.A plate cover 28, preferably metal of the same nature as the sheets 16 and 26, is inserted into the space formed by the two shoulders. The cache is U-section and is inserted with the branches of the U directed towards the connecting zone, each along one of the two shoulders formed on the one hand with the panel 18 and on the other hand with the panel 24. The cover can thus be mounted with a slight tightening ensuring its maintaining, the outer surface of the central portion of the U-section aligning with the outer surfaces of a straight member 20, or 22 and U-shaped section members 10 and 12.

Le pré perçage des tôles 16 et 26 aux zones de fixation permet une mise en place précise et une fixation aisée des éléments du caisson. La mise en place de caches 28 par insertion en force en est par conséquent également facilitée.The pre drilling of the sheets 16 and 26 to the attachment zones allows precise positioning and easy attachment of the elements of the box. The establishment of caches 28 by force insertion is therefore also facilitated.

Des moyens de calage et/ou de fixation (non représentés) peuvent être prévus entre la poutrelle est le caisson.Rigging and / or fixing means (not shown) may be provided between the beam and the box.

L'accès aux deux volumes formés par la poutrelle et le caisson, de part et d'autre de l'âme de la poutrelle, est rendu sensiblement plus facile. Le degré de finition du caisson est très élevé en particulier au niveau de coins qui sont continus au niveau de la tôle et également au niveau des zones de liaison entre les éléments, et ce au moyen du cache en U.Access to the two volumes formed by the beam and the box, on either side of the soul of the beam, is made significantly easier. The degree of finish of the box is very high especially at corners which are continuous at the sheet and also at the level of the connection areas between the elements, and by means of the U-shaped cover.

Il est à noter que l'un des deux éléments 20 et 22 de section ou ces deux éléments n'est pas nécessaire si un accès au volume de la poutrelle n'est pas désiré. Dans ce cas, le caisson comprendrait un premier et un deuxième élément de section généralement en U avec une partie centrale correspondant au creux du U et deux parties latérales correspondant aux branches du U, et destinés à être disposés en vis-à-vis de manière à épouser la poutrelle et à ce que au moins deux parties latérales du premier et du deuxième élément, respectivement, se rejoignent. Une telle configuration est illustrée à la figure 2. La section de l'extrémité libre d'au moins une partie latérale 18 d'un ou des premier et deuxième éléments 10 et 12 comprend un épaulement de manière à ce que l'extrémité libre de la partie latérale opposée destiné à y être relié puisse venir en appui sur ladite partie latérale avec alignement des surfaces extérieures de ladite partie latérale et de ladite partie latérale opposée. Les détails de constructions d'un tel caisson sont identiques à ceux décrits ci-avant en relation avec l'exemple de la figure 1. Dans ce cas, le caisson présenterait une seule jonction sur une ou chacune de deux faces opposées.It should be noted that one of the two elements 20 and 22 section or these two elements is not necessary if access to the volume of the beam is not desired. In this case, the box would comprise a first and a second generally U-shaped section element with a central portion corresponding to the hollow of the U and two side portions corresponding to the branches of the U, and intended to be arranged vis-à-vis to marry the beam and that at least two side portions of the first and second elements, respectively, meet. Such a configuration is illustrated in figure 2 . The section of the free end of at least one lateral portion 18 of one or more of the first and second members 10 and 12 comprises a shoulder so that the free end of the opposite lateral part intended to be connected to it can abut on said lateral portion with alignment of the outer surfaces of said lateral portion and said opposite lateral portion. The construction details of such a box are identical to those described above in relationship with the example of the figure 1 . In this case, the box would have a single junction on one or each of two opposite faces.

Claims (12)

Dispositif d'habillage et de protection contre le feu d'une poutrelle (4) notamment métallique, comprenant un caisson (2) de panneaux en matériau résistant au feu recouvert d'une feuille métallique ;
caractérisé en ce que le caisson comprend
un premier et un deuxième élément (10, 12) de section généralement en U avec une partie centrale (14) correspondant au creux du U et deux parties latérales (18) correspondant aux branches du U, et destinés à être disposés en vis-à-vis de manière à épouser la poutrelle (6) et de manière à ce que les extrémités d'au moins deux parties latérales (18) des premier et deuxième éléments (10, 12), respectivement, disposées en vis-à-vis, se rejoignent directement ou indirectement via un troisième élément (20, 22) du dispositif, de section généralement droite et destiné à être fixé au premier et au deuxième élément (10, 12) en reliant entre elles lesdites deux parties latérales (18).Apparatus for covering and protecting against fire a beam (4) in particular metal, comprising a box (2) of fireproof material panels covered with a metal sheet;
characterized in that the box comprises
a first and a second element (10, 12) of generally U-shaped section with a central portion (14) corresponding to the hollow of the U and two lateral parts (18) corresponding to the branches of the U, and intended to be arranged screw-in -shaped so as to fit the beam (6) and so that the ends of at least two side portions (18) of the first and second elements (10, 12), respectively, arranged vis-à-vis, join directly or indirectly via a third element (20, 22) of the device, of generally straight section and intended to be fixed to the first and second element (10, 12) by interconnecting said two side portions (18). Dispositif d'habillage et de protection contre le feu selon la revendication précédente, caractérisé en ce que le caisson (2) comprend un quatrième élément (22) de section généralement droite et destiné à être fixé au premier et au deuxième élément (10, 12) du côté opposé au troisième élément (20) en reliant entre elles deux parties latérales (18) des premier et deuxième éléments (10, 12), respectivement, et disposées en vis-à-vis.Device for covering and protection against fire according to the preceding claim, characterized in that the box (2) comprises a fourth element (22) of generally straight section and intended to be fixed to the first and second element (10, 12 ) on the opposite side to the third element (20) by connecting two side parts (18) of the first and second elements (10, 12), respectively, and arranged facing each other. Dispositif d'habillage et de protection contre le feu selon l'une des revendications précédentes, caractérisé en ce que, d'une part les premier et deuxième éléments (10, 12), et d'autre part le troisième et/ou le quatrième éléments (20, 22), comprennent des moyens de fixation mutuelle (19) tels que ces derniers sont mis en correspondance par un simple mouvement d'approche du troisième et/ou du quatrième élément (20, 22) vers les premier et deuxième éléments (10, 12).Device for covering and protection against fire according to one of the preceding claims, characterized in that , on the one hand the first and second elements (10, 12), and on the other hand the third and / or fourth elements (20, 22) comprise mutual fixing means (19) such that the latter are matched by a simple movement of approaching the third and / or fourth element (20, 22) towards the first and second elements (10, 12). Dispositif d'habillage et de protection contre le feu selon l'une des revendications précédentes, caractérisé en ce qu'il comprend au moins un, préférentiellement deux ou quatre caches métalliques (28) destinés à couvrir la ou les zones de liaison entre le premier et le deuxième élément (10, 12) et/ou entre le ou les premier et deuxième élément (10, 12) et le ou les troisième et quatrième éléments (20, 22) et, préférentiellement de manière à affleurer avec les surfaces extérieures desdits éléments de part et d'autre de la ou des zones de liaison.Device for covering and protection against fire according to one of the preceding claims, characterized in that it comprises at least one, preferably two or four metal caps (28) intended to cover the or the connecting regions between the first and the second element (10, 12) and / or between the first and second element (s) (10, 12) and the third or fourth element (20, 22) and, preferably, flush with the outer surfaces of said elements on either side of the connection area or zones. Dispositif d'habillage et de protection contre le feu selon l'une des revendications précédentes, caractérisé en ce que la section de l'extrémité libre d'au moins une des parties latérales (18) d'un des ou des premier et deuxième éléments (10, 12) comprend un épaulement (19) de manière à ce que l'extrémité de la partie latérale correspondante de l'autre des premier et deuxième éléments (10, 12) ou le troisième ou quatrième élément (20, 22) destiné(e) à y être relié puisse venir en appui sur ladite partie latérale (18) avec alignement des surfaces extérieures de ladite partie latérale et de ladite partie latérale correspondante ou de ladite partie latérale et dudit troisième ou quatrième élément.Device for covering and protection against fire according to one of the preceding claims, characterized in that the section of the free end of at least one of the side portions (18) of one or the first and second elements (10, 12) comprises a shoulder (19) so that the end of the corresponding side portion of the other of the first and second members (10, 12) or the third or fourth member (20, 22) for (e) to be connected thereto may abut on said lateral portion (18) with alignment of the outer surfaces of said lateral portion and said corresponding lateral portion or said lateral portion and said third or fourth member. Dispositif d'habillage et de protection contre le feu selon la revendication précédente, caractérisé en ce que l'épaulement est réalisé par une superposition et fixation préférentiellement par collage d'une portion de panneau (19) en matériau résistant au feu sur la portion de panneau formant la partie latérale (18) d'un ou des premier et deuxième éléments (10, 12).Device for covering and protection against fire according to the preceding claim, characterized in that the shoulder is formed by a superposition and fixing preferably by bonding a panel portion (19) of fire-resistant material on the portion of panel forming the lateral portion (18) of one or more first and second members (10, 12). Dispositif d'habillage et de protection contre le feu selon la revendication précédente, caractérisé en ce que la portion de panneau superposée (19) formant l'épaulement est d'une épaisseur et d'un matériau tels qu'ils permettent la tenue d'une vis dans l'épaisseur dudit panneau.Device for covering and protection against fire according to the preceding claim, characterized in that the superimposed panel portion (19) forming the shoulder is of a thickness and a material such that they allow the holding of a screw in the thickness of said panel. Dispositif d'habillage et de protection contre le feu selon l'une des revendications 4 et 5, caractérisé en ce que le premier et/ou le deuxième élément (10, 12) comprend une tôle métallique extérieure de finition (16) recouvrant également partiellement l'épaulement.Device for covering and protection against fire according to one of claims 4 and 5, characterized in that the first and / or second element (10, 12) comprises an outer metal finishing sheet (16) also partially covering the shoulder. Dispositif d'habillage et de protection contre le feu selon la revendication précédente, caractérisé en ce que la tôle métallique de finition (16) comprend à son extrémité recouvrant partiellement l'épaulement une première section (17) en forme d'escalier correspondant à l'épaulement, suivie préférentiellement d'une seconde section angulaire (21) se terminant par un bord libre de manière à ce que le bord libre de la tôle pénètre une rainure de la portion de panneau (19) résistant au feu destinée à recevoir la partie latérale correspondante de l'autre des premier et deuxième éléments ou le troisième ou quatrième élément.Device for covering and protection against fire according to the preceding claim, characterized in that the metal finishing sheet (16) comprises at its end partially covering the shoulder a first section (17) in the form of a staircase corresponding to the shoulder, followed preferably by a second angular section (21) ending in a free edge so that the free edge of the sheet penetrates a groove of the fire-resistant panel portion (19) for receiving the portion side of the other of the first and second elements or the third or fourth element. Dispositif d'habillage et de protection contre le feu selon la revendication précédente, caractérisé en ce que au moins une des parties latérales d'au moins un des premier et deuxième éléments (10, 12) et/ou le troisième et/ou le quatrième élément (20, 22) comprend une tôle métallique extérieure (26) de finition comprenant, à au moins un des bords de liaison avec le premier ou deuxième élément (10, 12), une section en escalier (27) de manière à présenter un bord plat libre (29) s'étendant dans le plan général de l'élément et destiné à venir en contact avec le palier inférieur de la première section (17) en forme d'escalier de la tôle métallique (16) du premier ou deuxième élément (10, 12).Device for covering and protection against fire according to the preceding claim, characterized in that at least one of the lateral parts of at least one of the first and second elements (10, 12) and / or the third and / or fourth element (20, 22) comprises an outer finishing metal sheet (26) comprising, at at least one of the connecting edges with the first or second element (10, 12), a step section (27) so as to have a free flat edge (29) extending in the general plane of the element and intended to come into contact with the lower bearing of the first stair-shaped section (17) of the metal sheet (16) of the first or second element (10, 12). Dispositif d'habillage et de protection contre le feu selon l'une des revendications 8 et 9, caractérisé en ce que le palier inférieur de la section (17) en escalier de la tôle métallique (16) du premier ou deuxième élément (10, 12) et/ou le bord plat libre (29) de la tôle métallique (26) d'une des parties latérales d'au moins un des premier et deuxième éléments (10, 12), du troisième et/ou quatrième élément (20, 22) comprend au moins un trou destiné à recevoir au moins une vis (30), préférentiellement du type auto taraudeuse.Device for covering and protection against fire according to one of claims 8 and 9, characterized in that the lower bearing of the section (17) of the metal sheet (16) of the first or second element (10, 12) and / or the free flat edge (29) of the metal sheet (26) of one of the lateral portions of at least one of the first and second elements (10, 12), the third and / or fourth element (20). , 22) comprises at least one hole intended to receive at least one screw (30), preferably of the self-tapping type. Dispositif d'habillage et de protection contre le feu selon les revendications 3 et 8, caractérisé en ce que le ou les caches métalliques (28) ont une section en forme de U de manière à pouvoir être insérés via les branches du U dans le volume de section rectangulaire formé par l'épaulement.Device for covering and protection against fire according to claims 3 and 8, characterized in that the metal cap (s) (28) have a U-shaped section so that they can be inserted via the arms of the U into the volume. of rectangular section formed by the shoulder.
EP09173200A 2009-10-15 2009-10-15 Device for covering and protecting steel joists against fire Withdrawn EP2312075A1 (en)

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EP09173200A EP2312075A1 (en) 2009-10-15 2009-10-15 Device for covering and protecting steel joists against fire
EP10768909A EP2488706A1 (en) 2009-10-15 2010-10-08 Covering and fire-protection device for metal girders
PCT/EP2010/065133 WO2011045247A1 (en) 2009-10-15 2010-10-08 Covering and fire-protection device for metal girders

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EP09173200A EP2312075A1 (en) 2009-10-15 2009-10-15 Device for covering and protecting steel joists against fire

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US4279111A (en) 1977-08-10 1981-07-21 High Efficiency Insulation Technologies, Inc. Retaining clip for soffit fixing on steel beams or columns
US4854107A (en) 1988-01-28 1989-08-08 Roberts Gary L Beam framing system and process
DE29611407U1 (en) * 1996-07-02 1996-10-02 Berweger Nina Fire protection clothing made of molded insulating parts
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GB1010699A (en) 1963-01-14 1965-11-24 Cape Building Prod Ltd Fireproof coverings for columns, beams and other framework members
FR2092721A1 (en) * 1970-06-11 1972-01-28 Assie Jacqueline
US4279111A (en) 1977-08-10 1981-07-21 High Efficiency Insulation Technologies, Inc. Retaining clip for soffit fixing on steel beams or columns
US4854107A (en) 1988-01-28 1989-08-08 Roberts Gary L Beam framing system and process
DE29611407U1 (en) * 1996-07-02 1996-10-02 Berweger Nina Fire protection clothing made of molded insulating parts
WO2007028974A1 (en) * 2005-09-07 2007-03-15 Interact Fire Solutions Limited Apparatus for protecting a building element from fire

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CN105089170A (en) * 2015-09-24 2015-11-25 江苏同风钢结构科技有限公司 Novel building material of fiberglass composite structure, production device and production method
CN105089170B (en) * 2015-09-24 2018-02-27 江苏溧阳建设集团有限公司 Construction material, process units and the production method of novel glass fiber composite construction

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