FR2799779A1 - FIREWALL PARTITION - Google Patents

Abstract

High-rise fire partition comprising fire-resistant facing panels, arranged on either side of a metal frame, said partition comprising a first part and a second part able to slide relative to one another. another so as to accommodate the relative deformations of the upper floor (2a) with respect to the lower floor (2b).

Description

I The invention relates to the technical field of the development of

  buildings, in particular the fitting out of premises by the installation of partitions or

fire walls.

  In the prior art, various embodiments of firewalls are already known. In a large number of cases, the wall structures used are

multilayer or sandwich.

  Thus, for example: - document FR-2 655 675 describes an insulating and fire-resistant partitioning panel comprising a core of glass foam bonded between two facings; - Document FR-A-2 663 660 describes a sandwich panel comprising two steel sheets and a core of refractory product; - Document EP-A-0 390 999 describes a fire-resistant material comprising a core, a decorative surface layer and a metal fire-resistant layer with fire-retardant fabric placed between the core and the decorative layer; - Document EP-A-0 312 618 describes a fire-resistant material comprising two facing in light concrete reinforced with fibers and an insulating core in polyurethane foam or in polystyrene; - Document FR-A2 674 885 describes a fire barrier comprising a plaster-based core surrounded by rock wool, glass or ceramic, two outer layers of covering enclosing the core; We can also refer to the following other documents: EP-A-0 875 371,

  EP-A-0 761 896, EP-A-0 718 447, EP-A-0 684 348, EP-A-0 663 482,

  EP-A-0 654 566, EP-A-0 631 865, EP-A-0 624 462, EP-A-0 557 226,

  EP-A-0 546 279, EP-A-0 543 349, EP-A-0 511 017, EP-A-0 507 713,

  EP-A-0 501 271, WO-A-97 34765, WO-A-97 21884, WO-A-96 20829,

  WO-A-96 01347, WO-A-95 10673, WO-A-92 15452, FR-A-2 710 930,

FR-A-2 695 159, FR-A-2 687 709.

  There are also known fire partitions provided with a metal frame on which panels such as those are directly attached.

  described in the documents above.

  Such partitions have many disadvantages. There is conventionally no provision for accommodating the differential thermal expansions of the partition, due to the strong gradient

  thermal between the face opposite the flames and the other face of the partition.

  The document FR-A-2 713 323 describes a partition system in which the vertical steel posts of the frame are provided with a telescopic element adjustable in height, locked on the post by a fixing means dissociable by heat, so that the telescopic element and the post are made

  free to expand under the effect of heat.

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

  centimeters, under the effect of heat.

  Such deformations are encountered in particular in the case of very high fire partitions, of the order of 2 to 18 meters in height by

example.

  The invention discloses a structure of fire barrier allowing the accommodation of deformations of large amplitudes, for example when the high floor collapses during a fire, this partition being able moreover to ensure a fire resistance greater than two hours. at 1000 C, on one

any of its faces.

  The invention also discloses a supporting structure for this partition.

  To this end, the invention relates according to a first aspect to a cut-off partition.

  fire comprising facing panels on either side of a metal frame defining housings for fire resistant panels, said partition comprising a first part and a second part capable of sliding relative to each other of so as to accommodate the deformations

  relative from the high floor to the low floor.

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

  receive doors or heavy loads.

  Other objects and advantages of the invention will become apparent during the course of the

  following description of embodiments, with reference to the figures

  appended among which: FIG. 1 is a cross-sectional view of a fire wall, according to an embodiment of the invention; Figure 2 is a top view of the fire wall of Figure 1; Figure 3 is an enlarged view of part of the fire wall of Figure 1; Figure 4 shows a structure supporting the partition of Figure 1 and allowing the creation of openings; Figure 5 is a view along section A-A of the structure of Figure 4;

  FIG. 6 is a view along section B-B of the structure of FIG. 4.

  Figure 1 shows, in cross section, a fire wall 1 provided with a device for absorbing hot deformations of a high floor 2a and, if necessary, of metal doors. It is understood that the high floor 2a, like the low floor 2b with which the partition 1 is associated, may be subject to deformation, in particular during a fire. By partition or wall, conventionally means substantially vertical non-load-bearing elements intended to ensure compartmentalization

internal of a building.

  Several types of partition can be distinguished: - fixed partitions, intended to remain in place permanently and whose constituent elements may require during the implementation of additional finishes. In the event of transformations, the constituent elements are only difficult to recover and the demolition work generates certain deteriorations; - joinery partitions, usually made of wood and specially made to measure the room, using non-standardized elements mounted on a framework generally constructed on site; - demountable partitions, the elements of which arrive finished or pre-finished on site. They are dismantled without significant deterioration and the components are most often reusable; - the removable partitions, the elements of which arrive completely finished on site. The components of these removable partitions are easily removable and reassemblable without degradation and are interchangeable with each other; - movable partitions, the elements of which move in a fixed system integral with the structural work, the partitions being sliding, folding or articulated. The invention relates to fire partitions, of the fixed, dismountable or removable type. These partitions 1 can extend over a great height, for example of the order of seven meters, and over a great length, for example of the order of

forty meters.

  In the remainder of the text, the numerical data, mentioned by way of example of embodiment (known as Example), relate to a partition of 6, 9 m high and

40 m long.

  The terms "vertical", "height", "top", "bottom", "lower", "upper" will be used subsequently with reference to the direction D1 of the figure. The terms "horizontal", "width" will be used subsequently with reference

to direction D2 in the figure.

  The term "length" will be used subsequently with reference to direction D3

  in the figure, the directions D1, D2 and D3 forming a direct trihedron.

  Initially, the partition will be described in its initial mounting state,

not deformed.

  The partition 1 shown comprises a lower part 3 secured to the floor

bottom 2b.

  By floor, we mean a structural element supporting the floor of a floor and

  constituting the horizontal separation between two floors.

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

box or even hollowed out.

  For improved fire protection, the high and low floors may include a deposit of perlite or vermiculite projected or glued on a plate on

their undersides.

  The steel beams possibly contained in the floors can

  also be coated or coated with flame retardant material.

  The lower part 3 of the partition 1 comprises a metal frame core in the shape of a parallelepiped, composed of a lower beam 5 and uprights

  vertical 4, the spacing of which varies as a function of the height of the partition.

  In the embodiment shown, this bottom rail 5 is a steel profile, in

U shape in cross section.

  Facing plates 6 are placed on the two lateral faces of the

  vertical metal uprights 4, on either side of the partition 1.

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

vertical metal uprights 4.

  Between these uprights 4 is placed a fire-retardant packing 7, made of a material chosen from the group comprising fibers of rock wool, glass wool, mixtures of metal hydroxides and magnesium binder or any

other equivalent material.

  The choice of plate material used depends in particular, as is known to those skilled in the art, on the desired fire resistance for a thickness

  and a given density of facing material.

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

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

the metal frame.

  In the example, the flame retardant packing 7 is a rock wool of thickness 80 mm, height 370 mm and density greater than 100 kg / m3,

  type sold under the reference Rockfeu 520.

  The metal frame of the lower part of the partition is, in a fashion

  realization, entirely in steel.

  In other embodiments, certain parts of the framework, in particular

  those with low load, are made of light material.

  In the example, this frame includes a double upright of 90 arranged

following a center distance of 400mm.

  We will now describe the upper part of the partition 1, capable of sliding relative to the lower part of this partition 1, in particular under the effect of a

  deformation of the high floor 2a during a fire.

  Starting from the substantially horizontal upper edge 10 of the flame-retardant packing 7 and the vertical uprights 4 and going vertically towards the high floor 2a, there are successively: - a first substantially horizontal plate 13; - The core 14 of a sheet metal sheet 15 in U open downwards; - a second substantially horizontal plate 16; - a vertical point hanger 17 secured to the second plate 16; a third plate 18 and a fourth plate 19, substantially

  horizontal, fixed in the high floor 2a.

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

submerged counterplate.

  As understood by a person skilled in the art, the upper part of the partition 1 comprises a metal frame incorporating a set of gantries

  suspended under the high floor 2a, in alignment with the partition 1.

  In the Example: - the distance, measured in direction D3, between the point lines is 2.6 m maximum, the cantilevered dimension of the brackets formed by the sheets 15 being 1.2 m maximum relative to the lines 17, the second plates 16 being arranged along the center distance of the HEA; - a set of expansion end of 20 is left between the shooting sheets 11, the position of the assembly bolts of these sheets in their oblong holes

  allowing the expansion of the sheet metal sheets 11 towards their end clearances.

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

bulkhead 1.

  Each metallic element of the framework is coated, coated or coated with a material chosen from the group comprising; plasters, plasters reinforced with cellulose fibers, expanded micas such as vermiculite, perlites, intumescent paints, expanded clays, light concretes, cellular concretes, lime mortars, cement or plaster mortars, or all of it

other equivalent material.

  In the Example, and according to FIG. 2: - a casing of the point lines 17 by a layer of Stucal of 10 × 120 or 20 × 120 is produced, the Stucal plates being fixed every mm in the corners by means of screws type VSCG 45 mm in length; - a strip 21 of Stucal or Domisol mineral wool is placed on the vertical external lateral faces of the sheet metal sheets 11, these strips 21 being held in place by two high and low angle angles of 6/10 and 32x23, spot welded on the sheet metal sheets 11; - a flocking 22 of total thickness 40 mm in Dossolant 2000S is carried out on the third and fourth plates 18, 19, in two passes of thickness

  mm, with the installation of an ordinary grid fixed by screwing.

  We now describe the enclosure of the metal framework of the part

bulkhead 1.

  In the Example and according to FIGS. 1 and 2 - a double framework in double rails of 70 is implemented between the punctual lines 17 and between the high floor 2a and the sheet metal 11; each frame comprises a high rail, under the high floor 2a, double uprights arranged at a center distance of 600 mm, a low rail screwed onto the sheet metal 11, the double uprights being suspended at the head by screwing in the high rails, and held in place bottom by screwing in the bottom rails; - panels of rock wool with a thickness of 80mm and a density of around 40kg / m3 are placed in the wings of the double uprights; - the metal frame is covered on its outer faces by two or three layers 23 of Placoflam 12.5, these plates 23 descending to the level + 5630 mm, ie 220 mm above the lower level of the sheet metal 11. These plates 23 are fixed by screws type VSCG in the plate II of Stucal of the casing of the lines 17 and in the wings of the sheet

shooting 11.

  The position and the sliding of the upper part of the partition with respect to its lower part will now be described. The height hl between the top level of the vertical uprights 4 of the metal framework of the lower part of the partition and the plane of the core 12 of the sheet metal 11 contained in the upper part of the partition corresponds to the displacement stroke of the upper part of the partition with respect to the part

  lower, for example when the high floor collapses during a fire.

  This deformation accommodation is obtained by sliding the two

  partition parts one with respect to the other.

  Flame retardant packing 7, for example in rock wool, plug-shaped

  thermal and gaseous during this sliding.

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

partition 1.

  In the example, a vertical deformation of maximum amplitude ranging from + 70 mm to -70 mm relative to a median position corresponding to equal deformations of the high and low floors could be accommodated by the

fire barrier.

  This amplitude can reach, if necessary, a value of + 200 mm per

compared to the average value.

  We now describe the structure supporting the partition in FIG. 1, and

  allowing the creation of openings, with reference to Figures 4, 5 and 6.

  This structure 30 comprises 3 vertical posts 31a, 31b, 31c made up of 90x90x5 tubes filled with concrete, the height of which is identical to the vertical posts of the current metal framework of the partition 1; the center post

  31 b being formed by two joined tubes.

  These vertical posts can be doubled or replaced by other profiles

according to the charges to be resumed.

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

  spillage of posts 31a, 31b, 31c.

  These posts allow the same vertical clearance of the floors as the

partition 1.

  The posts 31a, 31b, 31c are connected by a cross-member 33 made from two 90x90x5 tubes also filled with concrete, linked by two sails

welded in 4 mm sheet.

  On this cross-member 33 are fixed the supports of the sliding doors or of any

another heavy object.

  This cross member is integral with the end posts 31a, 31c, and connected to the central post 31b by a sheathing system allowing free expansion

  of said cross member, so as not to cause bending of the posts.

  The assembly made up of posts 31a, 31b, 31c and cross-member 33 forms two

  gantries 35, 36 attached to the level of the central post 31b.

  The interior of the gantries 35, 36 can be empty in normal service in order to create a passage opening and closed in the event of a disaster by a sliding fire door. Above and below the cross-member 33, the solid partition is made up of the

  same way as the partition 1 described above.

  A rail identical to the bottom rail of the partition 1 is placed on the cross member 33 to hold the vertical uprights, but is not integral with the cross member 33 so as not to

  be driven by the expansion of said crosspiece.

Claims (11)

  1. Fire-resistant partition comprising facing panels on either side of a metal frame defining housings for fire-resistant panels, said partition being characterized in that it comprises a first part and a second suitable part to slide relative to each other so as to accommodate the relative deformations of the high floor (2a) relative to the low floor (2b).   2. Partition according to claim 1, characterized in that its height is   between two and eighteen meters.   3. Partition according to claim 1 or 2, characterized in that the lower part of the partition comprises a metal frame core having vertical uprights 4, as well as a flame retardant packing (7); plates of   facing (6) being arranged on either side of this core.   4. Partition according to claim 3, characterized in that the flame retardant packing is made of a material chosen from the group comprising glass wools, rock wools, mixtures of metal hydroxides and binder   magnesium or any equivalent material.   5. Partition according to any one of claims 3 to 4, characterized in that   that the facing plates (6) are made of a material chosen from the group comprising plasters, plasters reinforced with glass fibers, reinforced plasters with cellulose fiber, expanded micas, light concretes, cellular concretes; the facing plates (6) which can be coated with sheet metal black steel or jointed stainless steel.   6. Partition according to any one of claims 3 to 5, characterized in that   that the facing plates (6) placed on one side of the lower part of the partition (1) extend over a height (h6) substantially equal to that of the facing plates placed on the other side of the lower part of the partition (1), this height (h6) being less than that (h4) of the vertical uprights (4) of the metal frame.   7. Partition according to any one of claims 3 to 6, characterized in that   that the width (17) of the flame retardant packing (7) is substantially equal to the width (14) of the metal frame.   8. Partition according to any one of claims 1 to 7, characterized in that   that its upper part comprises a folded sheet metal sheet (11) open downwards, vertical lines (17) and means (16, 18, 19) joining the vertical lines (17) to the sheet metal sheet (11) and to the floor high (2a) respectively, so that the upper part of the partition is provided with a metal framework incorporating a set of suspended gantries under the high floor (2a).   9. Partition according to claim 8, characterized in that the framework of the upper part of the partition is metallic and is coated, coated or coated with a material chosen from the group comprising; plasters, plasters reinforced with cellulose fibers, expanded micas, vermiculites, perlites, intumescent paints, expanded clays, light concretes, cellular concretes, lime mortars, cement or plaster mortars, or all of it other equivalent material.   10. Partition according to claim 8 or 9, characterized in that the framework of the upper part of the partition is a double framework, implemented between the lines (17) and between the high floor (2a) and the sheet strip (11), each frame comprising a high rail, under the high floor (2a), a low rail fixed to the sheet metal (11), and double uprights fixed to the high and low rails.   11. Partition according to any one of claims 1 to 10 characterized in that   that it has independent interior structures capable of receiving doors or heavy loads.