ASSEMBLY OF A BEAM AND PASSIVE FIRE PROTECTION ENCLOSURE FOR THE BEAM

Abstract

Assembly (10) of a beam (12) and a passive fire protection enclosure (16) for the beam (12), the beam (12) having a longitudinal direction (L) and, in a cutting plane perpendicular to the longitudinal direction (L), a section inscribed in a quadrilateral, the enclosure (16) comprising, in the cutting plane, exactly two rows of fixing angles (18) arranged along the longitudinal direction (L), a first row of angles (18A) and a second row of angles (18B), and at least two walls (20) fitted with panels, each angle comprising a first flange and a second flange, at least one flange being parallel to the sides of the quadrilateral, the first flange being disposed distally with respect to the beam (12),a first wall (20A) fitted with panels from among the at least two walls (20) being fixed to the first flange of the first row of angle brackets (18A) and a second wall (20B) fitted with panels from among the at least two walls (20) being fixed to the first flange of the second row of angle brackets (18B). Figure for the abbreviation: Fig. 1,

Description

Title of the invention: ASSEMBLY OF A BEAM AND A PASSIVE FIRE PROTECTION ENCLOSURE FOR THE BEAM Technical field

[0001] The present disclosure relates to passive fire protection of structural elements, for example of a building. In particular, the present disclosure relates to an assembly of a beam of a passive fire protection enclosure of the beam. Prior art

[0002] In the event of a fire, the structural elements of a building may see their capacity to support loads reduced.

[0003] For a structure comprising metal beams, it is known that the mechanical resistance of the beams changes inversely with temperature. Thus, in the event of a fire, when the temperature reaches several hundred degrees Celsius, the mechanical resistance of the metal structure of the building is no longer ensured.

[0004] Similar problems exist for wooden and / or concrete structures.

[0005] Thus, for wooden structural elements, carbonization of the wooden structural elements may occur, thereby reducing the volume of the structural element capable of supporting the loads.

[0006] For reinforced concrete structural elements, dehydration of the concrete is observed which can lead to the appearance of cracks and spalling of the reinforced concrete structural elements. This degradation of the reinforced concrete structural elements can expose the metal reinforcement present in the reinforced concrete, metal reinforcement which will then be exposed to the increase in temperature due to the fire.

[0007] In the event of a fire, the protective enclosure makes it possible to thermally insulate the structural elements when the temperature rises. The enclosure makes it possible, in particular, to delay and reduce the rise in temperature of the building's load-bearing structure.

[0008] Passive fire protection of structural elements of a building therefore makes it possible to prolong the structural integrity of the building in the event of a fire.

[0009] Protective enclosures for load-bearing structures comprising metal profiles are known. For example, these enclosures comprise panels fixed to the metal profile by clips and / or metal rails, themselves fixed to the metal profile. These fixing systems can be complex to implement, in particular for beams for which the integrity of the enclosure is more difficult to guarantee.

[0010] Furthermore, thermal bridges between the inside and the outside of the enclosure may be created by elements for fixing the enclosure to the metal profile, for example screws for fixing panels to a metal rail, the metal rail being fixed to the metal profile. These thermal bridges reduce the effectiveness of the enclosure. Statement of the invention

[0011] The present disclosure aims to remedy at least in part these drawbacks by proposing a casing that is simple to implement and install while providing good passive protection against fire of the beam.

[0012] For this purpose, the present disclosure relates to an assembly of a beam and a passive fire protection enclosure for the beam, the beam having a longitudinal direction and, in a section plane perpendicular to the longitudinal direction, a section inscribed in a quadrilateral, for example a rectangle, the enclosure comprising exactly two rows of fixing angles arranged in the longitudinal direction, a first row of angles and a second row of angles, and at least two walls equipped with panels, each angle comprising a first flange and a second flange, at least one flange being parallel to the sides of the quadrilateral, the first flange being arranged distally relative to the beam,a first wall equipped with panels among the at least two walls equipped with panels being fixed on a distal face of the first wing of the first row of angles and a second wall equipped with panels among the at least two walls equipped with panels being fixed on a distal face of the first wing of the second row of angles.

[0013] The terms "distal" and "proximal" are used in reference to the beam.

[0014] A beam is a load-bearing or structural element used to transfer loads to supports. The beam differs from the post in that the post is substantially vertical and rests on the ground.

[0015] By way of non-limiting example, the beam may be a metal profile, a wooden beam or a reinforced concrete beam.

[0016] Passive fire protection means protection obtained by means of materials whose physical form (absence of chemical reaction) does not change under the effect of heat and which provide protection against fire due to their physical or thermal properties. These materials may include materials containing water or endothermal materials which, under the effect of heat, produce cooling.

[0017] As non-limiting examples, the panels may comprise a material of passive fire protection such as gypsum, magnesium oxide, calcium silicate, cement, vermiculite and / or glass fibers.

[0018] Gypsum-based panels are also called plaster-based panels.

[0019] By way of non-limiting example, the panels may be gypsum-based panels with a non-woven fabric reinforcement having good dimensional stability and good crack resistance. A commercial example of such panels is a panel marketed under the name Glasroc® F.

[0020] The longitudinal direction is the direction parallel to the largest dimension of the beam, namely the length of the beam.

[0021] In the section plane perpendicular to the longitudinal direction, the beam has a section inscribed in a quadrilateral. For example, the quadrilateral may be a rectangle or a square. Thus, by way of non-limiting example, a reinforced concrete beam will generally have a substantially rectangular section which will itself be inscribed in a rectangle. Similarly, by way of non-limiting example, a beam formed by a metal I-section will have an I-section which will be inscribed in a rectangle of which two sides are equal to the dimension of the flanges of the beam and the other two sides are equal to the height of the web plus the thickness of the two flanges.

[0022] The beam is not a beam embedded in a building wall in the longitudinal direction, that is to say that the beam is not received in a longitudinal housing of the building wall. It is understood that in the section plane perpendicular to the longitudinal direction, the walls equipped with panels have dimensions (height of the panels) greater than the dimensions of the quadrilateral.

[0023] Thanks to the enclosure which comprises exactly two rows of angles, the enclosure is simpler to install, even with panels having heights greater than the dimensions of the quadrilateral. Indeed, it is possible to avoid the use of clips and / or the fixing of rails on the beam, in particular on the lower part of the beam which can degrade the mechanical properties of the beam.

[0024] The enclosure being a passive fire protection enclosure for the beam, it is understood that the beam is thermally insulated, that is to say that there is thermal protection formed around the beam by the enclosure. The enclosure makes it possible to delay heating of the beam by the heat of a fire by thermally insulating the beam from the ambient air.

[0025] Depending on the type of beam, the sealing of the enclosure can be completed by a wall of the building such as the ceiling (three-wall enclosure) or the ceiling and a side wall (two-wall enclosure) or the enclosure can completely surround the beam (four-wall enclosure), the second wing of each angle iron being fixed to a wall of the building or a wall of the enclosure.

[0026] The first wing being disposed distally relative to the beam, and the first and second walls being fixed on the distal face of the first wing respectively of the first row of angles and of the second row of angles, the second wings of the first row of angles and of the second row of angles are entirely protected from the ambient air by the walls equipped with panels. This makes it possible in particular to obtain better thermal sealing by avoiding creating a thermal bridge with the second wing of each angle and by creating continuity of the passive fire protection of the beam. Indeed, when the first wing is arranged proximally with respect to the beam, the first and second walls are fixed on the distal face of the first wing and opposite the second wing. The second wing therefore creates a thermal bridge between the interior and the exterior of the enclosure.

[0027] Furthermore, with the first flange of each angle iron disposed distally of the beam, there is a gap between the beam and the first and second walls. This gap accommodates dimensional changes of the beam and / or panels in the event of a fire. This gap also accommodates dimensional irregularities of the beam.

[0028] An enclosure as described above provides passive fire protection for a beam whose classification according to standard NF EN 13501-2:2023 is determined by following the test method defined in the NF standard relating to the nature of the beam, in particular steel (NF EN 13381-4:2013), wood (NF-EN 13381-7:2019) or reinforced concrete (NF EN 13381-3:2015).

[0029] In some embodiments, the panels are fixed to the corners by screws.

[0030] In certain embodiments, the walls equipped with panels are fixed together by means of staples, screws, nails and / or by gluing.

[0031] Staples allow for easier installation of the enclosure. Indeed, it is not necessary to make pilot holes in the panels before fixing them to each other. The use of staples also allows for faster fixing of the wall panels, compared to the use of screws for example.

[0032] In certain embodiments, two successive angles of the same row of angles are spaced from each other by a spacing in the longitudinal direction L.

[0033] The ends of two successive angles may not be joined. The positioning of the angles of the same row is therefore simplified.

[0034] By way of non-limiting example, the spacing between two angles may be greater than or equal to 1 mm, preferably greater than or equal to 3 mm and less than or equal to 30 mm, preferably less than or equal to 20 mm.

[0035] In some embodiments, each wall equipped with panels comprises a plurality of panels arranged jointly in the longitudinal direction, the enclosure comprising joint covers arranged at the joints between two successive panels of each wall equipped with panels.

[0036] The joint covers make it possible to increase the thermal sealing of the enclosure.

[0037] By way of non-limiting example, the joint covers can be made from the same material as the panels.

[0038] By way of non-limiting example, the joint covers may be made from a material different from the panels.

[0039] By way of non-limiting example, the joint covers and the panels may have an equal thickness.

[0040] By way of non-limiting example, the joint covers and the panels may have a different thickness.

[0041] In certain embodiments, the joint covers have a dimension in the longitudinal direction L greater than or equal to 100 mm.

[0042] The enclosure is not made heavier by the presence of the joint covers.

[0043] In certain embodiments, the joint covers of two walls equipped with panels are offset in the longitudinal direction.

[0044] The offset in the longitudinal direction of the joint covers of two walls equipped with panels makes it possible to improve the thermal sealing of the enclosure by avoiding having joints between the panels of the walls which are in the same section plane perpendicular to the longitudinal direction.

[0045] In some embodiments, the joint covers are disposed outside the quadrilateral.

[0046] The joint covers do not require the use of specific tools to be fixed to the enclosure, such as a U-shaped rail receiving the joint cover. The first wing of each angle iron being arranged distally relative to the beam, there is a space equal to the length of the second wing which allows the joint cover to be accommodated inside the enclosure formed by the walls equipped with panels.

[0047] When the beam is an I- or H-shaped metal profile, the joint cover being outside the quadrilateral, the joint cover is not arranged between the flanges of the beam, which facilitates the cutting of the joint covers (less strict dimensional tolerances) and the installation of the joint covers, in particular when the beam is of low height.

[0048] Furthermore, the joint cover can cover the parts of the joint between two successive panels which are opposite the core and the lower flange of the metal profile, and thus improve the thermal sealing of the enclosure. The joint cover can also cover the parts of the joint which are outside the quadrilateral in the sectional view and thus also improve the thermal sealing of the enclosure. in fact, when the joint cover is placed between the wings of the metal profile, the joint cover cannot cover the parts of the joint between two successive panels which are opposite the wings of the metal profile.

[0049] In some embodiments, at least one wall equipped with panels comprises two layers of panels.

[0050] In some embodiments, each paneled wall comprises two layers of panels.

[0051] The thermal insulation of the beam is improved by the presence of two layers of panels arranged one on top of the other.

[0052] In some embodiments, at least one wall equipped with panels comprises a first layer of panels and a second layer of panels, the joints between the panels of the first layer of panels and the joints between the panels of the second layer being offset in the longitudinal direction.

[0053] It is possible to do without the use of joint covers or joint-forming glue or paste.

[0054] In some embodiments, the enclosure is disposed at a distance from the beam on at least one side of the quadrilateral.

[0055] The space created by the distance between the beam and the enclosure, the enclosure being able to include the panels and the joint covers, makes it possible to accommodate dimensional changes of the beam and / or panels in the event of a fire. This space also makes it possible to accommodate dimensional irregularities of the beam.

[0056] By way of non-limiting example, the distance may be less than or equal to 10 mm.

[0057] In certain embodiments, the second wing of each angle iron is intended to be fixed to at least one wall of a building.

[0058] For example, when the beam is arranged near a wall and the ceiling of a room, the enclosure comprises two walls equipped with panels, the second wing of the first row of angles can be fixed on the wall and the second wing of the second row of angles can be fixed on the ceiling, or vice versa.

[0059] In some embodiments, the enclosure comprises at least three panel-equipped walls, a third panel-equipped wall among the at least three panel-equipped walls being fixed to the first wall and to the second wall, and the second wing of each angle iron being intended to be fixed on the same wall.

[0060] In some embodiments, the third wall equipped with panels is arranged at a distance from the beam.

[0061] In some embodiments, the joint covers of the third wall are arranged at a distance from the beam.

[0062] In some embodiments, the enclosure comprises at least four walls equipped with panels, a third wall equipped with panels among the at least four walls equipped with panels being fixed to the first wall and to the second wall and the second wing of each angle iron being fixed to a fourth wall equipped with panels among the at least four walls equipped with panels, the fourth wall equipped with panels being fixed to the first wall and the second wall.

[0063] In some embodiments, the beam is a metal I-shaped or H-shaped profile, comprising a web and two flanges, and the enclosure comprising at least four walls equipped with panels, a third wall equipped with panels among the at least four walls equipped with panels being fixed to the first wall and the second wall, a fourth wall equipped with panels among the at least four walls equipped with panels being fixed to the first wall and the second wall and the second flange of each angle iron being fixed to a flange of the metal profile. Brief description of the drawings

[0064] Other characteristics and advantages of the subject of the present disclosure will emerge from the following description of embodiments, given as non-limiting examples, with reference to the appended figures.

[0065] [Fig-1] [Fig.l] is a schematic perspective view of an assembly according to a embodiment of the invention.

[0066] [Fig.2] [Fig.2] is a schematic sectional view of the whole of [Fig.l] according to section plane II-II of [Fig.3].

[0067] [Fig.3] [Fig.3] is a schematic sectional view of the whole of [Fig.l] according to section plane III-III of [Fig.2].

[0068] [Fig.4] [Fig.4] is a schematic sectional view of [Fig.2] in the plane of section IV-IV.

[0069] [Fig.5] [Fig.5] is a schematic sectional view of [Fig.2] in the plane of VV cut.

[0070] [Fig.6] [Fig.6] is a schematic view similar to the schematic view of the [Fig.2],

[0071] [Fig.7] [Fig.7] is an enlarged schematic view of detail VII of [Fig.6].

[0072] [Fig.8] [Fig.8] is a schematic sectional view of an assembly according to a method of realization of the invention.

[0073] [Fig.9] [Fig.9] is a schematic sectional view of an assembly according to a method of realization of the invention.

[0074] [Fig. 10] [Fig. 10] is a schematic sectional view of an assembly according to one embodiment of the invention.

[0075] [Fig. 11] [Fig. 11] is a schematic sectional view of an assembly according to a mode of carrying out the invention.

[0076] [Fig. 12] [Fig. 12] is a schematic sectional view of an assembly according to one embodiment of the invention.

[0077] [Fig. 13] [Fig. 13] is a schematic sectional view of an assembly according to one embodiment of the invention.

[0078] [Fig. 14] [Fig. 14] is a schematic sectional view of an assembly according to one embodiment of the invention.

[0079] [Fig. 15] [Fig. 15] is a schematic sectional view of an assembly according to one embodiment of the invention.

[0080] [Fig. 16] [Fig. 16] is a schematic sectional view of an assembly according to one embodiment of the invention.

[0081] Throughout the figures, the elements in common are identified by identical numerical references. Detailed description

[0082] [Fig.l] is a schematic perspective view of an assembly 10 according to one embodiment of the invention.

[0083] In the embodiment of [Fig.l], the assembly 10 comprises a beam 12 and a casing 16 for passive fire protection of the beam 12, the beam 12 and the casing 16 being arranged in a longitudinal direction L.

[0084] Figures 2 to 7 relate to the embodiment of [Fig.l].

[0085] In the embodiment of Figures 1 to 7, the beam 12 is a metal I-shaped profile 12A comprising a core 12A1 and two flanges, an upper flange 12A2 and a lower flange 12A3, and the beam 12 is arranged near a wall 14 of a building, for example a ceiling of the building.

[0086] In the embodiment of Figures 1 to 7, the beam 12 has, in a section plane perpendicular to the longitudinal direction L, a section inscribed in a quadrilateral, in particular, the section of the beam 12A is inscribed in a rectangle. In other words, the metal I-shaped profile 12A has an I-shaped section which is inscribed in a rectangle of which two sides are equal to the dimension of the flanges of the beam and the other two sides are equal to the height of the web added to the thickness of the two flanges.

[0087] In the embodiment of Figures 1 to 7, the enclosure 16 comprises exactly two rows 18 of angles, a first row 18A of angles and a second row 18B of angles, the angles being arranged in the longitudinal direction L. Each row 18A, 18B of angles comprising a plurality of angles arranged in the longitudinal direction L.

[0088] As shown in Figures 4 and 5, each angle iron comprises a first wing 18A1, 18B1 and a second leg 18A2, 18B2. The first leg 18A1, 18B1 and the second leg 18A2, 18B2 are parallel to the sides of the rectangle. The first leg 18A1, 18B1 of each angle iron is disposed distally relative to the beam 12 and the second leg 18A2, 18B2 of each angle iron is fixed to the ceiling by means of screws 26, a first series of screws 26A for the first row 18A of angles and a second series of screws 26B for the second row 18B of angles. The second leg 18A2, 18B2 of each angle iron is fixed to the same wall 14 of the building, in this embodiment, the ceiling.

[0089] In the embodiment of Figures 1 to 7, the enclosure 16 comprises three walls 20 equipped with panels.

[0090] By way of non-limiting example, the panels may be gypsum-based panels with a non-woven fabric reinforcement having good dimensional stability and good crack resistance. A commercial example of such panels is a panel marketed under the name Glasroc® F. By way of non-limiting example, the panels have a thickness equal to 30 mm (millimeter).

[0091] In the embodiment of Figures 1 to 7, the enclosure 16 comprises a first wall 20A, a second wall 20B and a third wall 20C. The first wall 20A is fixed on a distal face of the first wing 18A1 of the first row 18A of angles. The second wall 20B is fixed on a distal face of the first wing 18B1 of the second row 18B of angles. The third wall 20C is fixed to the first wall 20A and to the second wall 20B.

[0092] In the embodiment of Figures 1 to 7 and by way of non-limiting example, the first wall 20A and the second wall 20B are fixed respectively to the first row 18A of angle iron and to the second row 18B of angle irons by means of screws 28, a first series of screws 28A for the first wall 20A and the first 18A of angle iron and a second series of screws 28B for the second wall 20B and the second row 18B of angle irons. The third wall 20C is fixed to the first wall 20A and to the second wall 20B by means of staples 30.

[0093] In the embodiment of Figures 1 to 7, each wall 20 comprises a plurality of panels arranged jointly in the longitudinal direction L. The enclosure 16 comprises joint covers 22 arranged at the joints between two successive panels.

[0094] By way of non-limiting example, the joint covers 22 may be made of the same material as the panels. The joint covers 22 may have a thickness equal to the thickness of the panels. Alternatively, the joint covers 22 may have a thickness different from the thickness of the panels, for example 15 mm. The joint covers may have a dimension in the longitudinal direction tudinal L equal to 100 mm.

[0095] As shown in Figures 2, 3 and 4 of the embodiment of Figures 1 to 7, the joint covers 22A of the first wall 20A and the joint covers 22B of the second wall 20B are arranged opposite the core and the lower flange 12A3 of the metal profile 12A. The joint covers 22A, 22B are also arranged opposite the space present between the lower flange 12A3 of the metal profile 12A and the third wall 20C equipped with panels of the enclosure 16.

[0096] As shown in Figures 2, 3 and 5 of the embodiment of Figures 1 to 7, the joint covers 22C of the third wall 20C are arranged at a distance 32 from the beam 12, in this embodiment, at a distance 32 from the lower flange 12A3 of the metal profile 12A. The distance 32 between the enclosure 16 and the beam 12 is the smallest distance chosen between a wall of the enclosure and the beam and a joint cover of the enclosure and the beam.

[0097] By way of non-limiting example, the distance 32 may be less than or equal to 10 mm.

[0098] As shown in Figures 2 and 3 of the embodiment of Figures 1 to 7, the joint covers 22C of the third wall 20C are offset in the longitudinal direction L relative to the joint covers 22A, 22B respectively of the first wall 20A and of the second wall 20B by an offset 24.

[0099] By way of non-limiting example, the offset 24 along the longitudinal direction L is preferably greater than twice the dimension of the joint cover 22 along the longitudinal direction L.

[0100] [Fig. 6] is a side view of the beam 12 and a row 18 of angle irons (first row 18A or second row 18B) of [Fig. 1]. The enlargement VII shown in [Fig. 7] shows the row 18 of angle irons and in particular two successive angle irons of the row 18. As shown in [Fig. 6], two successive angle irons of the same row 18 may be spaced apart from each other in the longitudinal direction L by a spacing 34. As a non-limiting example, the spacing 34 between two angle irons may be approximately 5 mm.

[0101] [Fig.8] is a view similar to [Fig.4] for another embodiment of the invention.

[0102] The embodiment of [Fig. 8] differs from the embodiment of Figures 1 to 7 in that the enclosure comprises two walls equipped with panels, a first wall 20A and a second wall 20B, in that the first row 18A of angles and the second row 18B of angles are fixed on different walls 14 of a building and in that the first wall 20A is fixed on the second wall 20B. The enclosure 16 may comprise joint covers 22 which are not present in the section plane of [Fig. 8].

[0103] The embodiments of Figures 9 to 13 differ from the embodiment of Figures 1 to 7, in that the enclosure 16 comprises four walls 20 equipped with panels, the fourth wall 20D being fixed to the first wall 20A and to the second wall 20B.

[0104] In the embodiments of figures 9 to 13, the joint covers 22 (22A, 22B, 22C, 22D) have been shown in the same section plane perpendicular to the longitudinal direction L. The joint covers 22A and 22C can be offset in the longitudinal direction L, the same applies to the other joint covers.

[0105] In the embodiment of [Fig.9], the second wing 18A2, 18B2 of each row 18A, 18B of angles is fixed on the upper wing 12A2 of the metal profile 12A.

[0106] In the embodiment of [Fig.9], the joint covers 22A of the first wall 20A and the joint covers 22B of the second wall 22B are arranged between the wings 12A2, 12A3 of the metal profile 12.

[0107] The embodiment of [Fig. 10] differs from the embodiment of [Fig. 9] in that the joint covers 22A, 22B are arranged on the distal face of the first wing 18A1, 18B1 of each row 18A, 18B of angles.

[0108] The embodiment of [Fig.l 1] differs from the embodiment of [Fig.9] in that the second wing 18A2 of the first row 18A of angles and the second wing 18B2 of the second row 18B of angles are fixed on a joint cover 22D of the fourth wall 20D of the enclosure.

[0109] The embodiment of [Fig. 12] differs from the embodiment of [Fig. 10] in that the second wing 18A2 of the first row 18A of angles and the second wing 18B2 of the second row 18B of angles are fixed to a joint cover 22D of the fourth wall 20D of the enclosure.

[0110] The embodiment of [Fig. 13] is similar to the embodiment of [Fig. 12]. It differs therefrom in that the beam 12 is a wooden beam 12B.

[0111] The embodiment of [Fig. 14] is similar to the embodiment of Figures 1 to 8. It differs in that the beam 12 is a wooden beam 12B. The view of [Fig. 14] is similar to the view of [Fig. 4]. The joint cover 22C of the third wall 20C equipped with panels is not shown, the joint cover 22C being in a different section plane.

[0112] The embodiment of [Fig. 15] is similar to the embodiment of Figures 1 to 8. It differs in that the beam 12 is a concrete beam 12C. The concrete beam 12C may be in one piece with the wall 14 of the building, in this example the ceiling. The view of [Fig. 15] is similar to the view of [Fig.4]. The joint cover 22C of the third wall 20C equipped with panels is not shown, the joint cover 22C being in a different section plane.

[0113] The embodiment of [Fig. 16] is similar to the embodiment of the figures 1 to 8. It differs in that each wall 20 is equipped with two layers of panels, a first layer of panels formed by the first wall 20A, the second wall 20B and the third wall 20C and a second layer of panels formed by a first wall 36A of the second layer of panels, a second wall 36B of the second layer of panels and a third wall 36C of the second layer of panels.

[0114] In the embodiment of [Fig. 16], the joints between the panels of the first layer of panels and the joints between the panels of the second layer are offset in the longitudinal direction L. The embodiment of [Fig. 16] also differs from the embodiment of Figures 1 to 8 in that the enclosure does not include a joint cover.

[0115] Although the present disclosure has been described with reference to a specific exemplary embodiment, it is obvious that various modifications and changes may be made to these examples without departing from the general scope of the invention as defined by the claims. Furthermore, individual features of the various embodiments recited may be combined in additional embodiments. Therefore, the description and drawings should be considered in an illustrative rather than restrictive sense.

Claims

Claims

1. Assembly (10) of a beam (12) and a casing (16) for passive fire protection of the beam (12), the beam (12) having a longitudinal direction (L) and, in a section plane perpendicular to the longitudinal direction (L), a section inscribed in a quadrilateral, for example a rectangle, the casing (16) comprising exactly two rows of fixing angles (18) arranged in the longitudinal direction (L), a first row of angles (18A) and a second row of angles (18B), and at least two walls (20) equipped with panels, each angle comprising a first flange (18A1, 18B1) and a second flange (18A2, 18B2), at least one flange being parallel to the sides of the quadrilateral, the first flange (18A1, 18B1) being arranged distally relative to the beam (12),a first wall (20A) equipped with panels among the at least two walls (20) equipped with panels being fixed on a distal face of the first wing (18A1) of the first row of angles (18A) and a second wall (20B) equipped with panels among the at least two walls (20) equipped with panels being fixed on a distal face of the first wing (18B1) of the second row of angles (18B).,

2. Assembly (10) according to claim 1, in which each wall (20) equipped with panels comprises a plurality of panels arranged jointly in the longitudinal direction (L), the enclosure (16) comprising joint covers (22) arranged at the joints between two successive panels of each wall (20) equipped with panels.

3. Assembly (10) according to claim 2, in which the joint covers (22) of two walls (20) equipped with panels are offset in the longitudinal direction (L).

4. An assembly (10) according to claim 2 or 3, wherein the joint covers (22) are arranged outside the quadrilateral.

5. An assembly (10) according to any one of claims 1 to 4, wherein the enclosure (16) comprises, in the section plane, two layers of panels.

6. An assembly (10) according to any one of claims 1 to 5, wherein the enclosure (16) is disposed at a distance (32) from the beam (12) on at least one side of the quadrilateral.

7. An assembly (10) according to any one of claims 1 to 6, wherein the second wing (18A2, 18B2) of each angle iron is intended to be fixed on at least one wall (14) of a building.

8. An assembly (10) according to claim 7, wherein the enclosure (16) comprises at least three walls (20) equipped with panels, a third wall (20C) equipped with panels among the at least three walls equipped with panels being fixed to the first wall (20A) and to the second wall (20B), and the second wing (18A2, 18B2) of each angle iron being intended to be fixed to the same wall (14) of the building.

9. An assembly (10) according to any one of claims 1 to 6, wherein the enclosure (16) comprises at least four walls (20) equipped with panels, a third wall (20C) equipped with panels among the at least four walls (20) equipped with panels being fixed to the first wall (20A) and to the second wall (20B) and the second wing (18A2, 18B2) of each angle iron being fixed to a fourth wall (20D) equipped with panels among the at least four walls (20) equipped with panels, the fourth wall (20C) equipped with panels being fixed to the first wall (20A) and the second wall (20B).

10. Assembly (10) according to any one of claims 1 to 6, in which the beam (12) is a metal profile (12A) in I or H, comprising a web and two flanges, and the enclosure (16) comprising at least four walls (20) equipped with panels, a third wall (20C) equipped with panels among the at least four walls (20) equipped with panels being fixed to the first wall (20A) and the second wall (20B), a fourth wall (20D) equipped with panels among the at least four walls (20) equipped with panels being fixed to the first wall (20A) and the second wall (20B) and the second flange (18A2, 18B2) of each angle iron being fixed on a flange of the metal profile (12A).

Images