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 exposition relates to the passive fire protection of structural elements, for example, of a building. In particular, the present exposition relates to a beam assembly and a passive fire protection enclosure for the beam. Previous technique

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

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

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

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

[0006] In reinforced concrete structural elements, dehydration of the concrete can lead to cracking and spalling. This deterioration of the reinforced concrete structural elements can expose the metal reinforcement within the concrete, which will then be exposed to the temperature increase caused by fire.

[0007] In the event of a fire, the protective enclosure provides thermal insulation to the structural elements when the temperature rises. The enclosure notably delays and reduces the temperature rise in 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 incorporating metal profiles are known. For example, these enclosures include panels fixed to the metal profile by clips and / or metal rails, themselves fixed to the metal profile. These fastening systems can be complex to implement, especially for beams where the integrity of the formwork is more difficult to guarantee.

[0010] Furthermore, thermal bridges between the inside and outside of the enclosure can be created by elements used to fasten the enclosure to the metal profile, for example, screws used to fix panels to a metal rail, the metal rail being fixed to the metal profile. These thermal bridges reduce the efficiency of the enclosure. Description of the invention

[0011] The present presentation aims to remedy at least in part these drawbacks by proposing a simple enclosure to implement and install while allowing good passive fire protection of the beam.

[0012] To this end, the present description 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 cutting 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 along the longitudinal direction, a first row of angles and a second row of angles, and at least two walls 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 arranged distally with respect to the beam,a first wall fitted with panels, one of at least two walls fitted with panels, being fixed to a distal face of the first wing of the first row of angle brackets, and a second wall fitted with panels, one of at least two walls fitted with panels, being fixed to a distal face of the first wing of the second row of angle brackets.

[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 column in that the column 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 is defined as protection obtained by means of materials whose physical form (absence of chemical reaction) does not change under the effect of heat and which provide fire protection due to their physical or thermal properties. These materials may include water-containing materials or endothermic materials which, under the effect of heat, produce cooling.

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

[0018] Gypsum-based panels are also referred to as plaster-based panels.

[0019] By way of non-limiting example, the panels may be gypsum-based panels with a non-woven fabric reinforcement exhibiting 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 cutting plane perpendicular to the longitudinal direction, the beam has a cross-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 cross-section that will itself be inscribed in a rectangle. Similarly, by way of non-limiting example, a beam formed by a steel I-beam will have an I-shaped cross-section that will be inscribed in a rectangle two sides of which are equal to the dimensions of the beam's flanges and the other two sides are equal to the web height plus the thickness of the two flanges.

[0022] The beam is not a beam embedded in a building wall along the longitudinal direction; that is, the beam is not received into a longitudinal recess in the building wall. It is understood that in the cross-sectional plane perpendicular to the longitudinal direction, the walls fitted with panels have dimensions (panel height) greater than the dimensions of the quadrilateral.

[0023] Thanks to the casing, which comprises exactly two rows of angle brackets, the casing is simpler to install, even with panels whose height exceeds the dimensions of the quadrilateral. This eliminates the need for clips and / or rail fixings to the beam, particularly on the lower part of the beam, which can degrade its mechanical properties.

[0024] Since the enclosure provides passive fire protection for the beam, it is understood that the beam is thermally insulated; that is, there is thermal protection formed around the beam by the enclosure. The enclosure delays the beam's heating 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 being fixed to a wall of the building or a wall of the enclosure.

[0026] With the first wing positioned distal to the beam, and the first and second walls fixed to the distal face of the first wing of the first and second rows of angle brackets respectively, the second wings of the first and second rows of angle brackets are completely protected from the ambient air by the walls fitted with panels. This notably provides better thermal sealing by avoiding the creation of a thermal bridge with the second wing of each angle bracket and by creating continuity of the passive fire protection of the beam. Indeed, when the first wing is positioned proximal to the beam, the first and second walls are fixed to the distal face of the first wing and opposite the second wing. The second wing therefore creates a thermal bridge between the inside and outside of the enclosure.

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

[0028] An enclosure such as described above allows passive fire protection of 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 in steel (NF EN 13381-4:2013), in wood (NF-EN 13381-7:2019) or in reinforced concrete (NF EN 13381-3:2015).

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

[0030] In some embodiments the walls fitted 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 pre-drill the panels before attaching them to each other. The use of staples also allows for faster attachment 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 along the longitudinal direction L.

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

[0034] By way of non-limiting example, the spacing between two angle brackets 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 certain embodiments, each wall equipped with panels comprises a plurality of panels arranged side by side along the longitudinal direction, the casing comprising cover joints arranged at the joints between two successive panels of each wall equipped with panels.

[0036] The joint covers increase the thermal sealing of the enclosure.

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

[0038] By way of non-limiting example, the cover strips can be made of a different material than the panels.

[0039] By way of non-limiting example, cover strips and panels may have the same thickness.

[0040] By way of non-limiting example, cover strips and panels may have a different thickness.

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

[0042] The enclosure is not weighed down by the presence of the cover joints.

[0043] In some embodiments, the cover strips of two walls fitted with panels are offset along the longitudinal direction.

[0044] The offset along 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 cutting plane perpendicular to the longitudinal direction.

[0045] In some embodiments, the cover strips are arranged 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 to receive the joint cover. Since the first flange of each angle bracket is positioned distal to the beam, there is a space equal to the length of the second flange which allows the joint cover to be accommodated inside the enclosure formed by the walls fitted with panels.

[0047] When the beam is a metal profile in the shape of an I or an H, 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 placement of the joint covers, in particular when the beam is of low height.

[0048] Furthermore, the joint cover can cover the portions of the joint between two successive panels that are opposite the web and the lower flange of the metal profile, and thus improve the thermal sealing of the enclosure. The joint cover can also cover the portions of the joint that are outside the quadrilateral in view in cross-section and thus also improve the thermal sealing of the enclosure. Indeed, when the joint cover is placed between the flanges of the metal profile, the joint cover cannot cover the parts of the joint between two successive panels that are opposite the flanges of the metal profile.

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

[0050] In some embodiments, each wall equipped with panels 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 along the longitudinal direction.

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

[0054] In some embodiments, the enclosure is placed 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 potentially including panels and joint covers, accommodates dimensional changes in the beam and / or panels in the event of a fire. This space also accommodates dimensional irregularities in the beam.

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

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

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

[0059] In some embodiments, the enclosure comprises at least three walls fitted with panels, a third wall fitted with panels among the at least three walls fitted with panels being fixed to the first wall and the second wall, and the second wing of each angle being intended to be fixed to 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 cover strips of the third wall are arranged at a distance from the beam.

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

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

[0064] Other features and advantages of the subject matter of this presentation will become apparent from the following description of embodiments, given by way of non-limiting examples, with reference to the attached figures.

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

[0066] [Fig.2] [Fig.2] is a schematic cross-sectional view of the entire [Fig.1] according to the section plane II-II of [Fig.3].

[0067] [Fig.3] [Fig.3] is a schematic cross-sectional view of the entire [Fig.1] according to the section plane III-III of [Fig.2].

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

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

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

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

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

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

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

[0075] [Fig. 11] The [Fig. 11] is a schematic cross-sectional view of an assembly according to an embodiment of the invention.

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

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

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

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

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

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

[0082] Fig. 1 is a schematic perspective view of an assembly 10 according to one embodiment of the invention.

[0083] In the embodiment of [Fig.1], the assembly 10 comprises a beam 12 and a passive fire protection enclosure 16 for the beam 12, the beam 12 and the enclosure 16 being arranged in a longitudinal direction L.

[0084] Figures 2 to 7 relate to the embodiment of [Fig. 1].

[0085] In the embodiment of figures 1 to 7, the beam 12 is a metal I-beam 12A comprising a web 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 shown in Figures 1 to 7, the beam 12 has, in a cutting plane perpendicular to the longitudinal direction L, a cross-section inscribed in a quadrilateral; in particular, the cross-section of beam 12A is inscribed in a rectangle. In other words, the I-beam 12A has an I-section inscribed in a rectangle, two sides of which are equal to the dimensions of the beam flanges and the other two sides are equal to the web height plus the thickness of the two flanges.

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

[0088] As shown in Figures 4 and 5, each angle bracket comprises a first flange 18A1, 18B1 and a second flange 18A2, 18B2. The first flange 18A1, 18B1 and the second flange 18A2, 18B2 are parallel to the sides of the rectangle. The first flange 18A1, 18B1 of each angle bracket is positioned distal to the beam 12, and the second flange 18A2, 18B2 of each angle bracket is fixed to the ceiling by means of screws 26, a first set of screws 26A for the first row 18A of angle brackets and a second set of screws 26B for the second row 18B of angle brackets. The second flange 18A2, 18B2 of each angle bracket 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 exhibiting 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 of 30 mm (millimeter).

[0091] In the embodiment shown in 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 to a distal face of the first wing 18A1 of the first row 18A of angle brackets. The second wall 20B is fixed to a distal face of the first wing 18B1 of the second row 18B of angle brackets. The third wall 20C is fixed to the first wall 20A and the second wall 20B.

[0092] In the embodiment shown in 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 brackets and to the second row 18B of angle brackets by means of screws 28, a first set of screws 28A for the first wall 20A and the first 18A of angle brackets, and a second set of screws 28B for the second wall 20B and the second row 18B of angle brackets. 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 side by side along the longitudinal direction L. The casing 16 includes cover strips 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 along the longitudinal direction 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 web and the lower flange 12A3 of the metal profile 12A. The joint covers 22A, 22B are also arranged opposite the space between the lower flange 12A3 of the metal profile 12A and the third wall 20C fitted 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 along the longitudinal direction L relative to the joint covers 22A, 22B respectively of the first wall 20A and 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 cover joint 22 along the longitudinal direction L.

[0100] Figure 6 is a side view of beam 12 and a row 18 of angle brackets (first row 18A or second row 18B) of Figure 1. The enlargement VII shown in Figure 7 presents the row 18 of angle brackets and in particular two successive angle brackets of the row 18. As shown in Figure 6, two successive angle brackets of the same row 18 may be spaced apart along the longitudinal direction L by a spacing 34. By way of non-limiting example, the spacing 34 between two angle brackets 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 fitted with panels, a first wall 20A and a second wall 20B, in that the first row 18A of angle brackets and the second row 18B of angle brackets are fixed to different walls 14 of a building, and in that the first wall 20A is fixed to the second wall 20B. The enclosure 16 may include joint covers 22 which are not present in the cross-sectional 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 represented in the same cutting plane perpendicular to the longitudinal direction L. The joint covers 22A and 22C can be offset along 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 angle brackets is fixed to 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 cover strips 22A, 22B are arranged on the distal face of the first wing 18A1, 18B1 of each row 18A, 18B of corner pieces.

[0108] The embodiment of [Fig.1 1] differs from the embodiment of [Fig.9] in that the second wing 18A2 of the first row 18A of angle brackets and the second wing 18B2 of the second row 18B of angle brackets are fixed on a cover joint 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 angle brackets and the second wing 18B2 of the second row 18B of angle brackets are fixed on a cover joint 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 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 cover strip 22C of the third wall 20C fitted with panels is not shown, as the cover strip 22C is in a different cutting 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 can be integral with the building wall 14, in this example the ceiling. The view of [Fig. 15] is similar to the view of [Fig. 4]. The cover strip 22C of the third wall 20C fitted with panels is not shown, as the cover strip 22C is in a different cutting plane.

[0113] The embodiment of [Fig. 16] is similar to the embodiment of 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 along the longitudinal direction L. The embodiment of [Fig. 16] also differs from the embodiment of Figures 1 to 8 in that the casing does not include a cover joint.

[0115] Although the present description has been made with reference to a specific embodiment, it is evident that various modifications and changes can 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 mentioned can be combined in additional embodiments. Therefore, the description and drawings should be considered in an illustrative rather than restrictive sense.

Claims

Demands

1. 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, for example a rectangle, the enclosure (16) comprising 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 wing (18A1, 18B1) and a second wing (18A2, 18B2), at least one wing being parallel to the sides of the quadrilateral, the first wing (18A1, 18B1) being disposed distally with respect to the beam (12),a first wall (20A) equipped with panels from among the at least two walls (20) equipped with panels being fixed to a distal face of the first wing (18A1) of the first row of angle brackets (18A) and a second wall (20B) equipped with panels from among the at least two walls (20) equipped with panels being fixed to a distal face of the first wing (18B1) of the second row of angle brackets (18B), the second wing (18A2, 18B2) of each angle bracket being intended to be fixed to at least one wall (14) of a building.

2. Assembly (10) according to claim 1, wherein each wall (20) equipped with panels comprises a plurality of panels arranged contiguously along the longitudinal direction (L), the casing (16) comprising cover joints (22) arranged at the joints between two successive panels of each wall (20) equipped with panels.

3. Assembly (10) according to claim 2, wherein the cover strips (22) of two walls (20) fitted with panels are offset along the longitudinal direction (L).

4. Assembly (10) according to claim 2 or 3, wherein the cover joints (22) are arranged outside the quadrilateral.

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

6. 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. Assembly (10) according to any one of claims 1 to 6, wherein the enclosure (16) comprises at least three walls (20) fitted with panels, a third wall (20C) fitted with panels among the at least three walls fitted with panels being fixed to the first wall (20A) and the second wall (20B), and the second wing (18A2, 18B2) of each angle being intended to be fixed to the same wall (14) of the building.

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