EP4127346A1 - Rail pour plafond suspendu comportant des absorbeurs de dilatation - Google Patents
Rail pour plafond suspendu comportant des absorbeurs de dilatationInfo
- Publication number
- EP4127346A1 EP4127346A1 EP21717146.1A EP21717146A EP4127346A1 EP 4127346 A1 EP4127346 A1 EP 4127346A1 EP 21717146 A EP21717146 A EP 21717146A EP 4127346 A1 EP4127346 A1 EP 4127346A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rail
- rail according
- bulb
- expansion
- compressive force
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/06—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members
- E04B9/08—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members having the capability of expansion, e.g. in case of fire
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/06—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members
- E04B9/065—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members comprising supporting beams having a folded cross-section
- E04B9/067—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members comprising supporting beams having a folded cross-section with inverted T-shaped cross-section
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
- E04B9/06—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members
- E04B9/065—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members comprising supporting beams having a folded cross-section
- E04B9/067—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members comprising supporting beams having a folded cross-section with inverted T-shaped cross-section
- E04B9/068—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members comprising supporting beams having a folded cross-section with inverted T-shaped cross-section with double web
Definitions
- the present invention relates to a new design of suspended ceiling tracks comprising expansion absorbers.
- Suspended ceilings are typically composed of panels supported by a rectangular grid of rails.
- the rails have an inverted T-shaped profile, comprising a vertical web, two branches of the T forming a sole capable of supporting the panels, and a bead at the top of the web.
- a decorative strip is positioned under the sole and wound around the longitudinal edges of the sole.
- the panels can be acoustic tiles.
- the suspended ceiling is typically supported by a rectangular grid of rails: long so-called main rails, arranged parallel to each other and resting at their ends on angles integral with the walls, constitute the primary structure of the grid. Shorter rails, called transverse, arranged parallel to each other, but in the direction orthogonal to the primary structure, connect the primary rails to each other.
- the openings of the rectangular mesh thus formed, and the size of which is determined by the length and spacing of the transverse rails, are adapted to the size of the panels which simply rest on the footings of the rails.
- the rails In the event of a real fire or during fire certification tests, the rails, exposed to high temperature rises (+ 500 ° C at 5min, + 650 ° C at 10min, + 850 ° C at 30min and 950 ° C at 60min) expand and lengthen. Generally fixed at their ends or in abutment against the side walls, the expansion of the longest rails is blocked, which causes, from the first minutes of the fire, their buckling out of the plane, distortions in the plane, the fall slabs and breaking fire insulation. To avoid these deformations and increase the fire stability of the acoustic ceiling, areas capable of absorbing expansion are provided in the rails. These expansion zones or absorbers are portions of rail with a specific geometry, capable of deforming under the effect of the compressive force due to thermal expansion and thus maintaining a minimum distortion in the rail.
- Document FR 2704016 describes a ceiling rail comprising an expansion section with a particular configuration. It consists of cutouts and punctures, offset on the two adjacent parts of the central rib and the upper bead.
- EP 1 167649 describes expansion absorbers which each have two cutouts, one in the bead, the other in the core.
- US 4,893,444 describes a rail comprising an expansion absorber consisting of a large opening 40.
- the opening has a length greater than the height of the rail, which greatly reduces the bearing load of the rail.
- the absorber causes a stall, that is to say a loss of alignment of the profile.
- the rails available on the market generally have a single expansion absorber along their length. Since the expansion of the rail can be of the order of 5 mm / m, a single absorber must then absorb several centimeters of elongation. The occurrence of large amplitude compressive deformations, located at a single point on the ceiling, generates distortions of the rectangular mesh and increases the risk of slabs falling.
- the object of the present invention is to provide ceiling tracks which include at least one expansion absorbers of a new design such that the tracks can absorb expansion while maintaining the integrity of the ceiling, so that the ceiling panels do not fall during a fire.
- one of the aims of the present invention is to provide ceiling rails which include several expansion absorbers.
- One of the aims of the present invention is to provide rails which retain a significant bearing load despite the presence of one or more expansion absorbers along their length.
- One of the aims of the present invention is to provide rails which can include several expansion absorbers so that each of the absorbers absorbs part of the elongation of the rail and the present invention therefore relates to a rail for supporting panels forming a suspended ceiling, said rail having a cross section in the shape of an inverted T and having a height Ht, the rail comprising:
- said rail comprising at least one expansion absorber; said expansion absorber comprising at least:
- - a main opening comprising 2 substantially vertical edges extending in the vertical core, the 2 edges being spaced apart by a length L1 when the rail is not subjected to a longitudinal compressive force, the 2 edges being aligned so forming a stop against each other, when the rail is subjected to a sufficient longitudinal compressive force; said main opening extending at the bottom to an area of material capable of forming a fold line when the rail is subjected to a longitudinal compressive force; - two slots each extending on either side of the main opening over a total length L2 greater than L1, the two slots delimiting with the sole, two strips of material capable of bending, the two substantially vertical edges s' extending over a height H1 representing between 0.3 and 0.8 times the height Hb of the web of the section, preferably between 0.4 and 0.8 times the height Hb of the web.
- the slots have a horizontal part and a vertical part. Bands of material capable of bending are thus delimited.
- the slots extend obliquely from the base of the edges of the opening towards the areas capable of forming a fold line.
- the opening extends at its upper part to a thin strip of material capable of deforming, under the effect of a longitudinal compressive force, forming a bridge.
- this strip of material capable of deforming comprises a central notch defining a fold line in the upper part of the bulb.
- the upper part of the bulb has a cutout; the main opening extending at its top to a segment of intact material between the main opening and the bulb cutout; each segment of intact material of the bulb being able to deform laterally under the effect of a longitudinal compressive force;
- the core may include an extra thickness stiffening the substantially vertical edges of the main opening.
- the ratio of the distances L2 / L1 is greater than 2, preferably greater than 4.
- the ratio of the distances L2 / L3 is preferably between 4 and 9, and more preferably between 5 and 8.
- the L1 / Ht ratio is between 0.05 and 0.8, preferably between 0.1 and 0.5.
- the two strips of material capable of bending have a height H2, the H2 / Hb ratio being between 0.02 and 0.4, preferably between 0.05 and 0.2.
- the rail according to the invention may include several expansion absorbers arranged along its length.
- FIG. 1 shows a perspective view of part of a rail comprising an expansion absorber, according to a first embodiment
- FIG. 2 shows the same perspective view when the rail is subjected to a longitudinal compressive force
- Figure 3 shows a front view of the uncompressed rail
- Figure 4 shows a front view of the rail subjected to a longitudinal compressive force
- FIG. 5 shows a front view of part of a rail comprising an expansion absorber, according to a second embodiment
- Figure 6 shows a front view of the same rail as in fig. 5, subjected to a longitudinal compressive force.
- Figs. 1 to 4 illustrate a rail 1, according to a first embodiment, the profile of which is an inverted T, comprising a central core 2 arranged vertically. At its lower end, the branches of the T form a sole 3 capable of supporting ceiling panels (not shown). The upper part of the core is surmounted by a bulb 4.
- the profile is made from a metal plate or steel sheet, a one piece. The core 2 therefore consists of a double thickness of the starting plate.
- An expansion absorber is shown in Figs. 1 and 3. It consists of a main opening 5 formed through the two thicknesses of the core 2. It extends at its upper part substantially up to the lower part of the bulb 4 and at its lower part up to to the sole 3.
- the opening 5 has two vertical edges 6a and 6b, separated by a distance L1. The opening draws a V-shaped notch 7 in its lower part.
- the expansion absorber also has two slots formed in the two thicknesses of the core 2, on either side of the opening 5.
- the slits have a horizontal part 8a, 8b, extending over a total distance L2 and a vertical part 9a and 9b connecting the distal end of the slit to the sole 3.
- the remaining distance between the lower end vertical slots 9a and 9b and the sole 3 is of the same order of magnitude as the thickness of the steel sheet constituting the rail.
- the slots define in the core 2, two strips of material 10a and 10b on either side of the notch 7 and above the sole 3.
- the slots define at their distal end a point of flexion of the sole when the rail is subjected to a longitudinal compressive force.
- the slots may extend obliquely from the main opening 5 to the sole 3.
- the expansion absorber further comprises a recess 11 in the upper part of the bulb 4 so as to define two strips of material 12a and 12b capable of buckling laterally when the rail is subjected to a longitudinal compressive force.
- Figs. 2 and 4 illustrate the rail 1 subjected to a longitudinal compressive force.
- the sole 3 and the strips of material 10a and 10b flex downward from the slits 9a and 9b, forming a fold line 13 under the notch 7.
- the strips of material 12a and 12b of bulb 4 move apart laterally and the edges 6a and 6b of the opening 5 approach.
- the strips of material 12a and 12b have a length L3.
- Figs. 3 and 4 show the same part of rail 1 fitted with an absorber, in front view.
- the distances L 1 have been shown between the two edges 6a and 6b and the distance L 2 between the distal ends of the horizontal parts 8a and 8b of the slots.
- the distance L2 defines the length of the sole which will flex under the compressive force.
- the distance L3 defines the length of the strips of material 12a and 12b of the bulb 4, capable of buckling when the rail is subjected to a longitudinal compressive force.
- the distance L2 is greater than the distance L1. In the example shown, L2 is approximately 14 times larger than L1.
- L1 has no effect on the load bearing capacity.
- L1 can be determined according to the desired fire resistance and the number of absorbers arranged on the same rail.
- the slots 8a, 9a and 8b, 9b of the absorber according to the present invention make it possible to maximize the load-bearing capacity of the rail and force the two ends of the rail to be held in an aligned plane, when the rail expands.
- Ht is the total height of the profile.
- Hb is the height of the soul. In the example shown, Ht is approximately 37mm and Hb is approximately 25mm.
- H1 is the height of the part of the vertical edges 6a and 6b located above the slots 8a, 8b. In the example shown, H1 is approximately half the height of the core Hb. The greater the H1, the more the compressive strength increases, which prevents all the expansion from being absorbed by a single absorber.
- H2 is the height of bands 10a and 10b. In the example shown, it is one tenth of Hb.
- H3 is the height of the strips of material 12a and 12b of bulb 4. In the example shown, H3 is eight tenths of the height of bulb 4 (Ht-Hb).
- Figs. 5 and 6 illustrate a second embodiment.
- the expansion absorber also consists of a main opening 50 formed through the two thicknesses of the core 2. It also extends at its lower part up to the sole 3, also drawing a notch 7 in the form of a V, but at its upper part, the opening 50 extends substantially to the upper part of the bulb 4, leaving only a thin strip of material 20. So that the strip of material 20 is able to buckle towards the top when the rail is subjected to a longitudinal compressive force, it has a notch 21 in the form of an inverted V. This notch 21 thins the strip of material 20 at its central part to form a folding zone 22 which rises when the rail is subjected to a longitudinal compressive force.
- the opening 50 also has two vertical edges 60a and 60b, distant by a distance L1.
- the expansion absorber also comprises the same slots 8a, 9a, 8b, 9b as the absorber illustrated in FIGS. 1 to 4.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Building Environments (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2002817A FR3108349B1 (fr) | 2020-03-23 | 2020-03-23 | Rail pour plafond suspendu comportant des absorbeurs de dilatation |
| PCT/FR2021/050481 WO2021191545A1 (fr) | 2020-03-23 | 2021-03-22 | Rail pour plafond suspendu comportant des absorbeurs de dilatation |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4127346A1 true EP4127346A1 (fr) | 2023-02-08 |
| EP4127346C0 EP4127346C0 (fr) | 2024-05-08 |
| EP4127346B1 EP4127346B1 (fr) | 2024-05-08 |
Family
ID=71784170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21717146.1A Active EP4127346B1 (fr) | 2020-03-23 | 2021-03-22 | Rail pour plafond suspendu comportant des absorbeurs de dilatation |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11788285B2 (fr) |
| EP (1) | EP4127346B1 (fr) |
| CA (1) | CA3168442C (fr) |
| FR (1) | FR3108349B1 (fr) |
| WO (1) | WO2021191545A1 (fr) |
Family Cites Families (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3175655A (en) * | 1962-02-16 | 1965-03-30 | Donn Prod Inc | Controlled expansion structural beam and grid structure including same |
| US3388519A (en) * | 1964-10-28 | 1968-06-18 | Donn Prod Inc | Controlled expansion structural beam and grid |
| US3390503A (en) * | 1965-09-10 | 1968-07-02 | Armstrong Cork Co | Thermally responsive beam joint |
| US3397501A (en) * | 1965-10-23 | 1968-08-20 | Reinhardt H. Jahn | Fire-rated runner with expansion section |
| US3496690A (en) * | 1967-04-17 | 1970-02-24 | Chicago Metallic Sash Co | Main runner part |
| US3589089A (en) * | 1969-10-20 | 1971-06-29 | Eastern Prod Corp | Structural beam for ceiling suspension system |
| US3778947A (en) * | 1971-11-03 | 1973-12-18 | Flangeklamp Corp | Fire-rated grid member with controlled expansion means |
| US3846031A (en) * | 1972-04-04 | 1974-11-05 | Rollform Inc | Ceiling grid system expansion joint |
| US3965631A (en) * | 1974-08-01 | 1976-06-29 | Roblin Hope's Industries, Inc. | Fire rated grid-member with controlled expansion means |
| CA1013917A (en) * | 1975-11-18 | 1977-07-19 | Ceiling And Drywall Products Limited | Controlled expansion suspended ceiling grid member |
| US4106878A (en) * | 1977-02-04 | 1978-08-15 | National Rolling Mills Company | Fire-rated ceiling grid cross joint |
| CA1038585A (fr) * | 1977-04-06 | 1978-09-19 | John O. Beynon | Poutre a dilatation controlee pour grille de plafond suspendu |
| US4598514A (en) * | 1984-09-06 | 1986-07-08 | Donn Incorporated | Suspension ceiling grid runner with expansion means |
| USRE33501E (en) * | 1985-05-13 | 1990-12-25 | National Rolling Mills, Inc. | Fire-rated beam with expansion relief section |
| US4606166A (en) * | 1985-05-13 | 1986-08-19 | National Rolling Mills Inc. | Fire-rated beam with expansion relief section |
| US4685262A (en) * | 1985-10-17 | 1987-08-11 | Consolidated Systems, Inc. | Main beam for ceiling panel suspension system |
| US4713919A (en) * | 1986-09-05 | 1987-12-22 | National Rolling Mills Inc. | Laser welded ceiling grid members |
| US4785595A (en) * | 1988-01-29 | 1988-11-22 | Chicago Metallic Corporation | Fire-rated main runner |
| US4893444A (en) | 1988-05-02 | 1990-01-16 | Armstrong World Industries, Inc. | Fire expansion joint for ceiling runner |
| US5313750A (en) * | 1992-04-06 | 1994-05-24 | Armstrong World Industries, Inc. | Fire-rated runner |
| US5347783A (en) * | 1993-03-04 | 1994-09-20 | Armstrong World Industries, Inc. | Prenotched fire-rated runner |
| US5349803A (en) | 1993-06-07 | 1994-09-27 | Armstrong World Industries, Inc. | Lanced fire-rated runner |
| US6351919B1 (en) * | 2000-07-01 | 2002-03-05 | Worthington Armstrong Venture | Compression relief section |
| US6751922B1 (en) | 2003-02-25 | 2004-06-22 | Worthington Armstrong Venture | Faceted radius grid |
-
2020
- 2020-03-23 FR FR2002817A patent/FR3108349B1/fr active Active
-
2021
- 2021-03-22 US US17/913,681 patent/US11788285B2/en active Active
- 2021-03-22 WO PCT/FR2021/050481 patent/WO2021191545A1/fr not_active Ceased
- 2021-03-22 EP EP21717146.1A patent/EP4127346B1/fr active Active
- 2021-03-22 CA CA3168442A patent/CA3168442C/fr active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA3168442C (fr) | 2023-09-12 |
| EP4127346C0 (fr) | 2024-05-08 |
| US11788285B2 (en) | 2023-10-17 |
| US20230114856A1 (en) | 2023-04-13 |
| CA3168442A1 (fr) | 2021-09-30 |
| WO2021191545A1 (fr) | 2021-09-30 |
| FR3108349B1 (fr) | 2022-03-25 |
| EP4127346B1 (fr) | 2024-05-08 |
| FR3108349A1 (fr) | 2021-09-24 |
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