Assembly of support for fire-resistant partition panels, including solid or glazed panels, and associated partitions

Abstract

A support assembly for a fire-resistant glazed partition is proposed, comprising: a profiled transom (P1) with an access panel (13) and a slot (8), two sliding rails (2, 12), and a one-piece support plate (P2) comprising a main portion (16) and an assembly portion (7), in which the two sliding rails (2, 12) and the slot (8) together define a passage in the transom (P1) into which the support plate (P2) can be inserted. The support plate slides freely within the slot (8), and the assembly portion (7) can project from the transom (P1) so as to be engaged in a stud (18). (Shorthand figure: Fig. 4)

Description

Title of the invention: Support assembly for fire-resistant partition panels, particularly for solid or glazed panels, and associated partitions technical field

[0001] This disclosure relates to fire-resistant partitions comprising panels, including glazed panels. More specifically, it relates to an assembly system between a steel stud and a cross member of such a partition. STATE OF THE ART

[0002] Since the 1980s, so-called "fire-resistant" partition systems that may include glazed panels have been known. The earliest of these systems included single panes of tempered glass that mechanically resisted a temperature rise, but did not provide thermal insulation between the surface of the wall not exposed to fire and the surface exposed. Such partitions cannot therefore be considered as having a true fire-resistant function.

[0003] More recently, legislation has evolved to require fire-resistant partitions to use double-glazed walls, comprising two glazed walls with an interposed layer of insulating material, generally transparent alkali silicate, which, during a fire, forms a wall that is flame-proof, gas-proof and thermally insulating by chemical transformation.

[0004] Fire-resistant partitions currently in use are made from assemblies of square or rectangular profiles that form the mullions (profiles extending vertically when the partition is erected) and the transoms (profiles extending horizontally). Infill panels are held in place by the mullions and supported by the transoms. These infill panels can be fire-resistant glazing or solid and / or opaque panels. The transoms are therefore subjected to significant mechanical stress due to the weight of the infill panels they must support, which necessitates the use of transoms with two long sides, occupying a large and unsightly space.

[0005] Applicant's French patent FR 3 110 628 proposes an assembly that offers certain advantages over previous partitions. This assembly is shown in [Fig. 1]. The assembly comprises a cross member PI having a hollow profile with a substantially rectangular cross-section, and a flat portion P2 extending partially inside and partially outside the hollow cross member PI. The flat portion P2 extends along the cross member PI, and a portion of this flat portion P2 located outside the cross member PI serves as a support for a glazing panel 4. The flat portion P2 thus provides the support function for the glazing 4 so that its presence limits the mechanical stress suffered by the cross member PI due to the weight of the glazing panel 4. This makes it possible to reduce the cross-section of the cross member PI, which corresponds to a cross-section of the cross member PI visible from one side of the partition.

[0006] The flat portion P2 is attached to a slide 2 located inside the cross member PI, either by bolting or welding. Alternatively, the flat portion P2 is formed as a single unit with the slide 2, or even attached directly to the cross member PI. Each cross member PI is mounted on a vertically arranged stud in the assembled configuration of the fire-resistant partition by means of two flat portions P2 located at the two ends of the cross member PI.

[0007] Installing a cross member PI on a stud therefore requires that the cross member PI be fully assembled beforehand, and in particular that the flat portion P2 be fixed, i.e., bolted or welded, either to the slide 2 or to the hollow-profile portion PI. Furthermore, all cross members connected to a stud must be assembled to that stud before the adjacent stud can be added to the assembly. The partition proposed in French patent FR 3 110 628 is thus limited in terms of the ease and speed of assembling the cross members themselves, as well as the cross members relative to the studs. Similarly, disassembling the cross members from the studs, for example to modify the arrangement of the glazed panels, requires the successive dismantling of a stud, then of all the cross members associated with it, before another adjacent stud can be dismantled. EXPOSED

[0008] There is therefore a need for a fire-resistant partition whose assembly, including the mounting of the glazing support element, as well as the subsequent mounting of the support element on a stud, is easier and faster.

[0009] To this end, a support assembly for a fire-resistant glazed partition is proposed, comprising: - a profiled cross member having a central recess, the cross member defining an assembly direction, an access wall of the cross member being provided with a slot extending over a part of the cross member according to the assembly direction, - a first slide and a second slide arranged in the central recess, and - a one-piece support plate, comprising: • a main portion that is substantially rectangular and has a first dimension greater than a first dimension of the crossbeam in a direction orthogonal to the access wall, the portion main portion having a second dimension less than or equal to a main dimension of the slot along the assembly direction, • a substantially rectangular assembly portion, extending from the main portion along a direction defined by the second dimension of the main portion, the assembly portion having a first dimension less than the first dimension of the cross member,

[0010] wherein the first slide, the second slide and the slot together define a passage in the cross member,

[0011] the support plate being dimensioned so as to be able to be placed in the passage, through the slot, and to be able to extend between the slides, said slides then ensuring its retention in relation to said cross member, while the support portion of said plate extends partially outside the cross member and is able to support a glazing panel,

[0012] and wherein said support plate is movable by sliding in the slot between a retracted position and a deployed position of its assembly portion, a length of the assembly portion protruding from one end of the cross member in the deployed position being greater than a length of the assembly portion protruding from the end in the retracted position, the length of the assembly portion protruding from one end of the cross member in the deployed position being intended to be engaged in a post.

[0013] The presence of two slides allows for a support assembly comprising a hollow cross member and a support plate, without the need for the plate to be welded or bolted, or more generally, permanently fixed to a slide or to the cross member itself. Thus, the slides together hold the plate within the cross member while allowing it to slide in the direction of assembly to enable the cross member to be mounted on the upright. Assembly is therefore simplified, as it is sufficient to place the cross member on the upright and slide the support plate into the deployed position.Moreover, the assembly is more versatile than in previous art: even if two vertical uprights were already mounted side by side, it is possible to place the crossbar between them, in its retracted position, since the majority - or even all - of the assembly portion of the support plate is retracted into the crossbar, and therefore does not prevent the placement of the crossbar between the uprights.

[0014] According to one embodiment, a second total dimension of the support plate is less than or equal to the main dimension of the slot.

[0015] According to one embodiment, an intumescent seal is disposed between the main portion and the first slider and / or an intumescent seal is disposed between the main portion and the second slider.

[0016] According to one embodiment, in the retracted position, the entire portion of the assembly is located in the central recess.

[0017] According to one embodiment, the first slide and the second slide are configured so that the passage extends from the slot to the inner wall of the cross member, an edge of the main portion being able to come into contact with the inner wall of the cross member.

[0018] According to one embodiment, the first slide and the second slide have a U-shaped section.

[0019] According to one embodiment, the cross member has a square section, the first dimension of the cross member and a second dimension of the cross member being greater than or equal to 35 mm and less than or equal to 45 mm, preferably substantially equal to 40 mm.

[0020] According to one embodiment, the access wall comprises: - a through hole configured to accommodate a headless screw capable of abutting against the first slide, and / or - a through hole configured to accommodate a headless screw capable of butting against the second slide, and / or - a through hole configured to accommodate a headless screw capable of butting against an edge of the assembly portion.

[0021] A second aspect is proposed: an assembly kit for a support assembly as defined above, comprising the cross member, the support plate, the first slide and the second slide,

[0022] A third aspect is proposed: a fire-resistant partition comprising: - a support assembly as defined above, - a glazed wall, an edge of the glazed wall resting on a portion of the main section projecting from the slot, and - an amount, the entire support package having risen to the amount in its deployed position.

[0023] A fourth aspect is proposed, a method for assembling a support assembly as defined above, the method comprising the following steps: - Insert the support plate through the slot, - Insertion of the first slide and the second slide into the recess, - coupling of the support assembly to the upright, including a sliding of the support plate in the recess from the retracted position to the deployed position.

[0024] According to one embodiment of the method, the insertion of the second slide into the recess is carried out before the insertion of the support plate, so that the second slide supports part of the weight of the support plate when the support plate is inserted. DESCRIPTION OF THE FIGURES

[0025] Other features, purposes and advantages will become apparent from the following description, which is purely illustrative and not limiting, and which should be read in conjunction with the accompanying drawings on which:

[0026] [Fig. 1] represents a vertical cross-sectional view of a fire-resistant partition comprising a glazing panel, known from the prior art.

[0027] [Fig.2] represents a fire-resistant partition comprising a glazing panel and a proposed support assembly for the glazing panel.

[0028] [Fig.3a] represents a vertical cross-sectional view of the fire-resistant partition of [Fig.2], according to a first embodiment.

[0029] [Fig.3b] represents a vertical cross-sectional view of the fire-resistant partition of [Fig.2], according to a second embodiment.

[0030] [Fig.4] represents the support assembly of the fire-resistant partition of [Fig.2] as well as the stud 18 in which the support assembly can be assembled.

[0031] [Fig.5a] represents a support plate for the support assembly of [Fig.4], according to a first embodiment.

[0032] [Fig.5b] represents a support plate of the support assembly of [Fig.4], according to a second embodiment.

[0033] [Fig.6] represents a proposed method for assembling the support assembly of [Fig.4], and coupling it to an upright.

[0034] In all figures, the same reference signs designate similar or identical elements. DETAILED DESCRIPTION OF IMPLEMENTATION METHODS

[0035] Figure 2 illustrates a fire-resistant partition 17 which comprises one or more uprights 18. Cross members PI are assembled to the uprights 18, so as to form a grid arrangement.

[0036] Between the uprights 18 and the cross members PI are arranged panels 4, 6. These may be solid metal panels or glazed panels. In the case of glazed panels 4, 6, the glass and its dimensions are chosen to prevent the passage of fire from one side of the partition 17 to the other side. Advantageously, a glazing panel 4, 6 is of the double-glazed type, which minimizes heat transfer from its surface on the fire side to its other surface. For example, the glazing panels 4, 6 are of the double-glazed type comprising a filling between two glazed surfaces, such as an alkali silicate. The glazing panels 4, 6 have a thickness, along a direction DI orthogonal to the partition 17, of between 25 and 35 mm, preferably about 28 mm.

[0037] Figures 3a and 3b show a vertical cross-sectional view of the fire-resistant partition 17, according to two distinct embodiments. A support assembly provides mechanical support for the weight of a glazing panel 4 arranged above the cross member PL. The support assembly, also visible in [Fig. 4], includes the cross member PI, which has a polygonal hollow section, generally rectangular.The cross member PI may in particular have a square section, with a width W1 defined along the direction DI orthogonal to the partition 17 of approximately 40 mm and a height Tl along a vertical direction D3 of approximately 40 mm. The hollow recess of the cross member has been referenced by 11.

[0038] In addition to the cross member PI, the support assembly includes a support plate P2. Two slides 2, 12 are arranged in the cross member PI and allow the support plate P2 to be fixed relative to said cross member PL. In a mounted configuration of the fire-resistant partition 17, the two slides 2, 12 are attached to one side and the other of the support plate P2.

[0039] When the cross member PI has a rectangular or square section, the slides have a U-shaped cross-section. As shown in [Fig.3a] and 3b, each slide 2, 12 has two branches 21, 22 and a bottom 19 connecting the branches 21, 22 together.

[0040] According to a first embodiment, shown in [Fig.3a], the slides 2, 12 are arranged in the recess 11 so as to face each other by their openings between their arms 21, 22. The edges of the arms 21, 22 of the two slides 2 and 12 are opposite each other, while the bottoms 19 constitute the parts of the two slides 2, 12 that are furthest from each other. The slides 2, 12 and the internal recess 11 of the cross member PI are dimensioned so that the two slides 2, 12 can be offset from each other in the height of the cross member PL. In the case where the support plate P2 is inserted into the cross member PI while the two slides 2, 12 are already arranged in the cross member PI, such an offset makes it possible to provide a space between the slides 2, 12 of a height sufficient to allow the introduction and sliding of the support plate P2 between the slides 2, 12.In the case where one of the slides 2, 12 is inserted into the cross member PI after insertion of the support plate P2, the space is of sufficient height to allow the insertion of said slide 2, 12. In both cases, the space. must however remain sufficiently narrow to allow the support plate P2 to be clamped in the cross member PI in such a way as to prevent the support plate P2 from disengaging from the cross member PI in the absence of manual action by a user.

[0041] According to a second embodiment, shown in [Fig. 3b], the slides 2, 12 are arranged in the recess 11 such that the edges of the arms 21, 22 of the two slides 2 and 12 are opposite the inner wall of the cross member PI, while the bottoms 19 constitute the parts of the two slides 2, 12 arranged opposite each other. The slides 2, 12 thus have a shape complementary to that of the inner wall of the cross member PI, and the orientation of the slides along the vertical direction D3 in the cross member PI is therefore reversed compared to the first embodiment.The slides 2, 12 and the internal recess 11 of the cross member PI are dimensioned so that the two slides 2, 12 can be offset from each other in the height of the cross member PL. In the case where the support plate P2 is inserted into the cross member PI while the two slides 2, 12 are already positioned in the cross member PI, such an offset makes it possible to provide a space between the bottoms 19 of the slides 2, 12 of sufficient height to allow the insertion and sliding of the support plate P2 between the slides 2, 12. In the case where one of the slides 2, 12 is inserted into the cross member PI after the insertion of the support plate P2, the space is of sufficient height to allow the insertion of said slide 2, 12.In both cases, however, the space must remain sufficiently narrow to allow the support plate P2 to be clamped by the bottoms 19 in the cross member PI, in such a way as to prevent the support plate P2 from disengaging from the cross member PI without manual action by a user.

[0042] For the two aforementioned embodiments, a side wall of the cross member PI, called the access wall 13, has an access slot 8 which allows the support plate P2 to be slid into the recess 11. The plate P2 thus introduced into the cross member PI and between the slides 2, 12 is intended to come against the wall 20 of the cross member opposite the wall 13.

[0043] However, for the first embodiment illustrated in [Fig. 3a], the branches 22 closest to the wall 20 opposite the access wall 13 touch when the slides 2, 12 are in place in the cross member PL. The sum of their respective heights is equal to the height of the recess 11 of the cross member PL. The support plate P2 then comes to rest against these branches 22, but not against the wall 20. In this case, the support plate P2 is held in the cross member PI by being clamped between the first two branches 21 located near the access wall 13.

[0044] Thanks to the two slides 2, 12, the support plate P2 is held in the cross member PI without any fixed attachment between the support plate P2 and the cross member PI or between the support plate P2 and the slides 2, 12. In particular, it is not necessary to bolt or weld the support plate P2 to the slides 2, 12, so that the support plate P2 remains able to slide in the direction DI orthogonal to the partition 17 and the glazing panel 4. This results in easy insertion or removal of the support plate P2 in the cross member PI, as well as easier assembly and easier disassembly of the support assembly.

[0045] Intumescent seals 5 can be arranged in the recess 11, on either side of the support plate P2 (or on one side thereof), between the support plate P2 and the bottoms of the slides 2, 12 (for the first embodiment of [Fig. 3a]) or between the inner wall of the cross member PI and the bottoms 19 (for the second embodiment of [Fig. 3b]). Thus, when a fire breaks out on the side of the partition 17 that includes the cross member PI, the intumescent seals expand to occupy most of the available space in the recess 11, and increase the thermal insulation provided by the cross member PI to the fire-resistant partition 17.

[0046] The portion of the support plate P2 that extends beyond the slot 8, and therefore outside the cross member PI, is dimensioned to support the glazing panel 4. In particular, the thickness TP2 of the support plate P2—or at least of the portion thereof that supports the panel 4 when the thickness TP2 of the support plate P2 is not constant—must be sufficient to support the weight of the glazing panel 4, while ensuring that the cross member PI does not exceed predefined dimensions (in particular, a square section of 40 mm x 40 mm). Optionally, another solid or glazed panel 6 may extend below the support plate P2 and may be supported by another support element (not shown) identical to the support element in Figures 3a and 3b.When the panel positioned below the support plate P2 is a solid panel 6, for example metallic, the cross member PI can be fixed to the solid panel 6 by a fixing screw 28 passing through the solid panel 6 and through the access wall 13.

[0047] The support element includes a clamp 3, also visible in Figures 3a and 3b. The clamp 3 is disposed on a face 42 of the glazing panel 4 opposite the face 41 of the glazing panel facing the cross member PL. The clamp 3 includes a groove 24 configured to receive a lug 23 disposed on an edge of the support plate P2 opposite the cross member PL. The clamp 3 allows the glazing panel 4 to be clamped against the access wall 13 of the cross member PL.

[0048] Figures 4, 5a and 5b illustrate the support plate P2 in more detail. The support plate P2 has a shape such that it defines two substantially rectangular portions extending in line with each other, along a direction D2 which, in the mounted configuration of the support plate P2 in the cross member PI, is aligned with a direction along which the cross member PL extends. A main portion 16 has a dimension W16 along the DI direction which is larger than the corresponding dimension W7 of the other portion, called assembly portion 7.

[0049] With reference to [Fig.5a], the support plate P2 can therefore define an L-shape, with on one side a straight edge 25 which extends without a step in the direction of the length of the plate P2 (assembly direction D2) and on the other side an edge with a step which defines the two portions 7 and 16.

[0050] Alternatively, and as shown in [Fig. 5b], the central portion 16 extends beyond the width of the assembly portion 7 along the DI direction on both sides. In particular, the assembly portion 7 and the central portion 16 can be centered around the same median axis X7 extending along the assembly direction D2. For both embodiments mentioned above, the main portion 16 has a length L16 which is necessarily less than the length L8 of the slot, the main portion 16 projecting from the slot and constituting the part of the support plate P2 which provides mechanical support for the glazing panel 4.

[0051] Furthermore, according to a particular embodiment, the length LP2 of the support plate P2 (i.e., the sum of the length L7 of the assembly portion and the length L16 of the main portion 16) is less than the length of the slot 8. Thus, the support plate P2 can be inserted into the slot 8 by a simple horizontal translational movement along the direction D1. Conversely, the total length LP2 may be greater than the length of the slot 8, in which case the insertion must be carried out by inserting the assembly portion 7 into the slot 8 first, before performing a hybrid insertion movement, both along the direction D1 and along the assembly direction D2 to allow the main portion 16 to in turn access the cross member PI.

[0052] Once inserted into the slot 8, the support plate P2 can slide along the assembly direction D2. The support plate P2 has a deployed position, visible in particular in [Fig.4] in which the support plate P2 is located as close as possible to a first end 26 of the slot 8, this first end 26 being itself located near an end 14 of the cross member PI from which the assembly portion 7 protrudes. Thus, in the deployed position, a length of the assembly portion 7 protruding from the end 14 along the assembly direction D2 is as great as possible. This position therefore allows a secure assembly of the cross member PI to a post 18 by means of the assembly portion 7. For this purpose, the post 18 includes a mounting hole 29 suitable for receiving the assembly portion 7 of the support plate P2 so that it engages in it and ensures the retention of the cross member PI and the post P2.A thickness of the mounting hole 29 of the upright along the vertical direction D3 is substantially equal to a thickness of the assembly portion 7 along this same direction, so as to allow a retention by . interference of the assembly portion 7 once it is inserted into the mounting hole 29.

[0053] In the deployed position, the main portion 16 can be in contact with the first end 26 of the slot 8, when the shape of the first end 26 is complementary to the shape of the main portion 16. Alternatively, and as shown in [Fig.4], the main portion 16 can remain slightly away from the first end 26 of the slot 8, including in the deployed position, for example when the first end 26 has a rounded shape which does not allow the main portion 16 to come into contact with the first end 26.

[0054] Correspondingly, the main portion 16 of the support plate P2 can be slid as close as possible to a second end 27 of the slot 8, located furthest from the end 14 of the cross member PI. The plate P2 can be either in contact with the second end 27, when their shapes are complementary, or slightly away from the second end 27, for example, when the second end 27 is rounded. When the main portion 16 is positioned as close as possible to the second end 27, the assembly portion 7 protrudes only slightly from the end 14—or, when the total length LP2 of the plate P2 is less than the length L8 of the slot, the assembly portion 7 is entirely housed within the recess 11. Thus, the assembly portion 7 does not obstruct the placement of the cross member PI between two vertical uprights 18.In particular, when the assembly portion 7 is configured to be fully housed in the recess 11 in the retracted position, the cross member PI can be inserted between two vertical uprights 18 by simple insertion along the DI direction orthogonal to the partition 17, without risk of the assembly portion 7 hindering this movement.

[0055] In order to ensure that the slides 2, 12 do not move once positioned in the recess 11 of the cross member PI, the access wall 13 includes two threaded through holes 9, configured to accommodate headless screws. Each screw is screwed into the through hole 9 until it exerts pressure on the arm 21 of the corresponding slide 2, 12, the arm 22 on the opposite side then being constrained against the opposite wall 20 of the cross member PL. Similarly, the access wall 13 includes a through hole 8 with an internal thread, into which a worm screw can be screwed, so as to press against an edge of the assembly portion 17 and constrain the support plate P2 against the opposite wall 20 to the access wall 13. The screw is only inserted through the through hole 8 once the assembly portion 7 has moved into the deployed position, for example at the end of an assembly of the cross member PI onto a post 18.

[0056] This disclosure also relates to a kit comprising a plurality of separate components, supplied in such a way as to permit the assembly of a set of support as defined above. The kit includes at a minimum a hollow cross member PI, in particular with a rectangular or square cross-section, the two slides 2, 12 and the support plate P2. The kit may also include one or more intumescent seals 5, to be inserted into the recess of the cross member PI once the support plate P2 is positioned in the cross member PL. Finally, the kit may include the headless screws which allow a force to be applied to the slides 2, 12 or to the assembly portion 7 of the support plate P2, via the through holes 8, 9.

[0057] This disclosure also relates to an assembly method for forming a support element from the previously defined kit elements. The assembly includes inserting the support plate P2 into the cross member PI via the slot 8. The insertion is performed either by a simple action along the DI direction orthogonal to the access wall 13 (when the LP2 length of the support plate P2 is less than the length of the slot L8), or by inserting the assembly portion 7 into the slot 8, followed by inserting the support plate with a hybrid movement along the DI direction and the assembly direction D2. When the insertion is performed solely along the D1 direction, the assembly method includes a step of sliding the support plate P2 from the retracted position to the extended position.The process may also include such a step when the insertion is performed according to a hybrid movement, but may also include a single insertion step according to the hybrid movement.

[0058] Once mounted, the support element can be assembled to a post 18. With reference to [Fig.6], coupling the support assembly to the post 18 includes sliding the support plate P2 so as to move it from its retracted position to its deployed position, the assembly portion 7 then fitting into the complementary mounting hole 29 of the post 18. The mounting hole 29 allows the assembly portion 7 to be retained by interference - an internal thickness of the mounting hole 29 is then substantially identical to the thickness TP2 of the support plate P2.

[0059] Steps 102, 102' for inserting the slides 12, 2 are also part of the assembly process. These steps can be carried out before or after the insertion 101 of the support plate P2 into the cross member. It is advantageous to insert the second slide 12 into a lower portion of the cross member PI before inserting the support plate P2 into the cross member PI, as the second slide 12 then supports the weight of the support plate P2 during insertion, thus reducing the effort required by a user during the insertion 101 of the support plate P2.

[0060] Steps for inserting the headless screws into the through holes 8, 9 can also be provided, the only condition being that these steps are carried out subsequently to the insertion of the corresponding portion (slides 2, 12 and support plate P2) into the cross member.

Claims

Demands

1. Support assembly for a fire-resistant glazed partition, comprising: - a profiled cross member (PI) having a central recess (11), the cross member (PI) defining an assembly direction (D2), an access wall (13) of the cross member (PI) being provided with a slot (8) extending over a portion of the cross member (PI) along the assembly direction (D2), - a first slide (2) and a second slide (12) disposed in the central recess (11), and - a one-piece support plate (P2), comprising: • a main portion (16) substantially rectangular and having a first dimension (W16) greater than a first dimension (Wl) of the cross member (PI) in a direction orthogonal to the access wall (13), the main portion (16) having a second dimension (L16) less than or equal to a main dimension (L8) of the slot (8) in the assembly direction (D2), • a substantially rectangular assembly portion (7), extending from the main portion (16) in a direction defined by the second dimension (L16) of the main portion (16), the assembly portion (7) having a first dimension (W7) smaller than the first dimension (Wl) of the cross member (PI), in which the first slide (2), the second slide (12) and the slot (8) together define a passage in the cross member (PI), the support plate (P2) being dimensioned so as to be able to be placed in the passage, through the slot (8), and to be able to extend between the slides (2,12), said slides (2,12) then ensuring its retention with respect to said cross member (PI), while the support portion (16) of said plate (P2) extends partially outside the cross member (PI) and is able to support a glazing panel (4), and wherein said support plate (P2) is movable by sliding in the slot (8) between a retracted position and a deployed position of its assembly portion (7), a length of the assembly portion (7) protruding from one end (14) of the cross member (PI) in the deployed position being greater than a length of the assembly portion (7) protruding from the end (14) in the retracted position, the length of the assembly portion (7) protruding from one end (14) of the cross member (PI) in the deployed position being intended to be engaged in a post (18).

2. Support assembly according to claim 1, wherein a second total dimension (LP2) of the support plate (P2) is less than or equal to the main dimension (L8) of the slot (8).

3. Support assembly according to any one of claims 1 and 2, wherein an intumescent seal (5) is disposed between the main portion (16) and the first slider (2) and / or wherein an intumescent seal (5) is disposed between the main portion (16) and the second slider (12).

4. Support assembly according to any one of claims 1 to 3, wherein, in the retracted position, the entire portion of the assembly (7) is located in the central recess (11).

5. Support assembly according to any one of claims 1 to 4, wherein the first slide (2) and the second slide (12) are configured such that the passage extends from the slot (8) to the inner wall of the cross member (PI), an edge of the main portion (16) being able to come into contact with the inner wall of the cross member (PD-

6. Support assembly according to any one of claims 1 to 5, wherein the first slide (2) and the second slide (12) have a U-shaped section.

7. Support assembly according to any one of claims 1 to 6, wherein the cross member (PI) has a square section, the first dimension (Wl) of the cross member (PI) and a second dimension (Tl) of the cross member (PI) being greater than or equal to 35 mm and less than or equal to 45 mm, preferably substantially equal to 40 mm.

8. Support assembly according to any one of claims 1 to 7, wherein the access wall (13) comprises: - a through hole (9) configured to accommodate a headless screw suitable for abutting against the first slide (2), and / or - a through hole (9) configured to accommodate a headless screw suitable for abutting against the second slide (12), and / or - a through hole (10) configured to accommodate a headless screw suitable for abutting against an edge of the assembly portion (7).

9. Assembly kit for a support assembly according to any one of claims 1 to 8, comprising the cross member (PI), the support plate (P2), the first slider (2) and the second slider (12),

10. Fire-resistant partition (17) comprising: - a support assembly according to any one of claims 1 to 8, - a glazed wall (4), an edge of the glazed wall resting on a part of the main portion (16) projecting from the slot (8), and - a stud (18), the support assembly being mounted in the stud (18) in its deployed position.

11. Method of assembling a support assembly according to any one of claims 2 to 8 to a post, comprising the following steps: - insertion (101) of the support plate (P2) through the slot (8), - insertion (102, 102') of the first slide (2) and the second slide (12) into the recess (11), - coupling (103) of the support assembly to the post, comprising sliding the support plate (P2) in the recess (11) from the retracted position to the deployed position.

12. An assembly method according to claim 11, wherein the insertion (102) of the second slide (12) into the recess (11) is carried out before the insertion (101) of the support plate (P2), so that the second slide (12) supports part of the weight of the support plate (P2) during the insertion (101) of the support plate (P2).

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