EP2562323A1 - Plafond suspendu et procédé pour fournir un profilé pour un plafond suspendu - Google Patents

Plafond suspendu et procédé pour fournir un profilé pour un plafond suspendu Download PDF

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Publication number
EP2562323A1
EP2562323A1 EP11179024A EP11179024A EP2562323A1 EP 2562323 A1 EP2562323 A1 EP 2562323A1 EP 11179024 A EP11179024 A EP 11179024A EP 11179024 A EP11179024 A EP 11179024A EP 2562323 A1 EP2562323 A1 EP 2562323A1
Authority
EP
European Patent Office
Prior art keywords
profile
suspended
ceiling
deflection
suspended ceiling
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
Application number
EP11179024A
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German (de)
English (en)
Other versions
EP2562323B1 (fr
Inventor
Mikael Möller
Torbjörn PERSSON
Jan Wilkens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Ecophon AB
Original Assignee
Saint Gobain Ecophon AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Saint Gobain Ecophon AB filed Critical Saint Gobain Ecophon AB
Priority to DK11179024.2T priority Critical patent/DK2562323T3/en
Priority to PL11179024T priority patent/PL2562323T3/pl
Priority to EP11179024.2A priority patent/EP2562323B1/fr
Priority to PCT/EP2012/066441 priority patent/WO2013030091A1/fr
Priority to EA201490442A priority patent/EA201490442A1/ru
Publication of EP2562323A1 publication Critical patent/EP2562323A1/fr
Priority to ZA2014/02146A priority patent/ZA201402146B/en
Application granted granted Critical
Publication of EP2562323B1 publication Critical patent/EP2562323B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E04B9/065—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
    • E04B9/061—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 supporting construction for curved ceilings
    • 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
    • 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
    • E04B9/18—Means for suspending the supporting construction
    • E04B9/20—Means for suspending the supporting construction adjustable
    • E04B9/205—Means for suspending the supporting construction adjustable by means of a resilient clip

Definitions

  • the present invention relates a suspended ceiling comprising a grid and at least one ceiling tile.
  • the grid is formed of one or more profiles and is adapted to support said at least one ceiling tile, wherein each profile is adapted to be supported at at least two suspension points.
  • the present invention also relates to a method for providing a profile for a suspended ceiling.
  • Suspended ceilings can be installed in many different types of buildings for various reasons, for example to absorb sound, to reflect light, to lower the ceiling height or to conceal installations such as cable arrangements, ventilation equipment, lighting installations and other devices arranged in the space between the suspended ceiling and the ceiling structure of a building.
  • a suspended ceiling usually comprises a plurality of ceiling tiles and a supporting structure in form of a grid.
  • the grid comprises profiles which support the ceiling tiles.
  • the grid often comprises main profiles which are suspended to the ceiling structure of the building and transverse or cross profiles which are supported by the main profiles.
  • the profiles usually have an inverted T-shape.
  • the ceiling tiles may have sound-absorbing and/or sound-insulation properties in order to improve the acoustic environment of the room.
  • the tiles for instance, may be made of a compressed fibre material such as mineral wool and especially glass wool.
  • the profiles may also support various equipments such as lightning devices, ventilation equipments, inspection openings, detectors, cable trays, loudspeakers, signs, sprinklers etc.
  • the profiles are subjected to a load resulting from the weight of ceiling tiles or other equipment supported by the profile.
  • a load on a profile causes deflection.
  • the deflection is proportional to the load and strongly depends on the span between the points where the profile is supported. The deflection is also undesirable due to aesthetic reasons.
  • the deflection is measured as the maximum distance between the profile and an imaginary straight line between adjacent suspension points when the profile is in its loaded condition.
  • EN 13964 Various standards for suspended ceilings, for example EN 13964 include requirements on the maximum deflection allowed. EN 13964 allows a deflection (for instance measured in mm) not exceeding the distance the profile between the adjacent suspension points (for instance measured in mm) divided by 500 (for EN 13964 class 1), or for certain premises divided by 300 (EN 13964 class 2). However, the maximum deflection must be less or equal to 4,0 mm according to EN 13964 class 1.
  • One solution suggested in order to minimise the deflection of a loaded profile is to increase the bearing capacity of the profile.
  • the profile may be strengthen in different ways, for example by increasing the material thickness of the profile, by adding stiffening grooves to the profile, or by adding a reinforcement bulb to a web of the profile.
  • Another solution provided in the prior art in order to increase the torsional rigidity of the profile is to fold the profile such that the web has a layered structure and join different portions of the web of the profile by gluing, wedging or riveting. Examples of such solutions are found in WO 2009/087378 and in EP 2 099 983 .
  • a further object is to provide a suspended ceiling including a profile which withstands deflection better compared to the prior art solutions.
  • a suspended ceiling comprising a grid and at least one ceiling tile, the grid being formed of one or more profiles and being adapted to support said at least one ceiling tile, wherein each profile is adapted to be supported at at least two suspension points.
  • At least one profile of said one or more profiles comprises in an unloaded condition at least one upwardly curved portion, such that, in a loaded condition of said at least one profile, said at least one profile extends such that a deflection of said at least one profile is less than a predetermined value.
  • the predetermined value may be a maximum allowed value according to any of existing or future standards.
  • the deflection of said at least one profile in the loaded condition is less than a distance between two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the deflection of said at least one profile in the loaded condition is less than the distance between two adjacent suspension points of said at least one profile divided by a factor of 500.
  • an unloaded condition is meant a condition wherein the profile is unaffected by the force of gravity resulting from the own weight of the profile and from any additional load in a vertical direction.
  • a loaded condition is meant a condition wherein the profile is affected by the force of gravity resulting from the own weight of the profile and from any additional load in a vertical direction.
  • the additional load may be both a uniformly distributed load and/or a point load.
  • suspension points are meant a point wherein the profile is suspended, for example suspended by another profile, suspended by a suspension means, for example a hanger, or directly to the ceiling structure of the building by means of a fastening means.
  • the profile By providing the profile with at least one curved portion extending between adjacent suspension points, the profile forms in its unloaded condition an upwardly curved line in the vertical direction, i.e. as seen in a plane perpendicular to the extension of the suspended ceiling.
  • the profile When a load is applied to the profile but also by the own weight of the profile, the profile is deformed by the load such that it extends more or less along a straight line, or is deflected such that the deflection is less than the distance between two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the load is light-weight compared to the rigidity of the profile, the profile may even remain slightly upwardly curved in the loaded direction. However, the requirement that the deflection is, for example, less than the distance between two adjacent suspension points of the profile divided by a factor of 300 is still fulfilled.
  • the curvature required in the unloaded condition such that the profile, in the loaded condition, extends such that the deflection is less than a predetermined value, for example the distance between two suspension points divided by a factor of 300.
  • the curvature in the unloaded condition of the profile is calculated such that the deflection of the profile in the loaded condition of the profile is less than a maximum allowed value, for example the deflection is less than the distance between two suspension points divided by a factor of 300.
  • the profile can carry an increased load.
  • the maximum distance in a vertical direction between an upwardly curved portion extending between two suspension points and an imaginary straight line extending between the suspension points is equal to the distance between the suspension points divided by 300.
  • the curved profile can carry a load being doubled compared to a conventionally straight profile until the maximum allowed deflection is reached according to various standards such as EN 13964, ASTM C635, BS 8290 part 2, DIN 18 168 and SS 81 51 13.
  • the load that the profile can carry before reaching the maximum deflection allowed according to standards, for example EN 13964, is increased when using a profile having a curved portion compared to a conventional straight profile.
  • a profile having an upwardly curved portion may therefore carry a larger load in form of more ceiling tiles, heavier ceiling tiles, more additional equipment etc, before an undesired deflection is obtained.
  • the profile may be curved such that the maximum distance in mm in the vertical direction between the curved portion in its unloaded condition and an imaginary straight line corresponds to the previous deflection.
  • the profile may be even more curved in order to carry a larger load and still fulfil the deflection requirement.
  • the material thickness of the profile if the profile comprises at least one upwardly curved portion.
  • the cost of the profile can be decreased since the consumption of material for each profile is reduced.
  • a conventional profile which is not curved having a decreased material thickness would result in a deflection exceeding the allowed deflection for a certain load. If the same profile is provided with at least one curved portion, the deflection would be below the allowed deflection if the same load is applied. If a certain dimension is required for a profile in order to avoid a too large deflection when a load is applied, it is possible to diminish the dimension if a profile having at least one curved portion is used instead.
  • a grid for supporting a suspended ceiling usually comprises main profiles which are suspended to the ceiling structure and transverse profiles being suspended by the main profiles.
  • the ends of the transverse profile may be suspended by the main profiles such that the transverse profile is extending between at least two main profiles. If the profile having at least one upwardly curved portion is a transverse profile, the profile in its unloaded condition comprises an upwardly curved portion between the two adjacent suspension points. If the upwardly curved profile is a main profile, the main profile is curved such that it in its unloaded condition comprises at least one curved portion in the vertical direction between two adjacent suspension points.
  • the grid supporting the suspended ceiling may comprise both conventional profiles and a profile or profiles having at least one upwardly curved portion.
  • the profile having an upwardly curved portion may be both a main profile and a transverse profile.
  • both types of profiles may comprise upwardly curved portions.
  • Said at least one profile may be plastically and/or elastically deformed in its unloaded condition.
  • the upwardly curved portion may be formed in alternative ways.
  • the upwardly curved portion may be formed by plastically deforming the profile such that at least one curved portion is formed. Thereby, the profile is plastically deformed in its unloaded condition. Plastically deformation may be performed by a roll forming operation.
  • the curved portion may be formed by elastically deforming the profile such that at least one curved portion is formed. Thereby, the profile is elastically deformed in its unloaded condition. Elastically deforming may be achieved by introducing an internal state of stress into the profile.
  • a combination is also possible.
  • the curved portion may be formed by both plastically and elastically deformed such that at least one curved portion is formed. The profile may thus be both elastically and plastically deformed in its unloaded condition.
  • Said at least one profile may be pre-stressed in its unloaded condition.
  • the at least one upwardly curved portion may be formed by pre-stressing the profile.
  • the profile By pre-stressing the profile, the profile is elastically deformed such that at least one curved portion is formed.
  • pre-stressing the profile an advantageous stress distribution is obtained.
  • Tensile stress is formed at the upper parts of the profile due to the pre-stressing condition. The tensile stress improves the stability of the profile and reduces the risk of lateral-torsional buckling.
  • An internal state of stress may also be introduced into the profile by fixing a profile having at least one curved portion directly to the ceiling structure of the building.
  • a spacing member may be arranged between the profile and the ceiling structure.
  • the profile is fixed to the ceiling such that the profile extends along a straight line, preferably parallel to the ceiling.
  • an internal state of stress is introduced into the profile and the profile is thereby pre-stressed.
  • the profile may carry an increased load without reaching a critical deflection.
  • the material thickness of the profile may be reduced without reaching maximum allowed deflection.
  • Said at least one curved portion may be concavely curved in an upward direction in the unloaded condition of the profile as viewed from a side of the profile adapted to face the interior of a room when mounted in suspended ceiling.
  • the curved portion is upwardly curved in a plane perpendicular to the plane of the suspended ceiling.
  • Said at least one profile in its loaded condition may be elastically deformed by means of load applied and own weight such that in a loaded condition of said at least one profile, said at least one profile extends such that the deflection of said at least one profile is less than the predetermined value.
  • the predetermined value may be the distance between two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the curved portion of the profile is deflected due the load applied and the own weight of the profile.
  • Said at least one profile may have a curvature in the same direction along its entire longitudinal extension in its unloaded condition. Thereby, a single upwardly curved portion is formed.
  • the curved portion may be extending between two adjacent suspension points of the profile.
  • Said at least one profile may comprise a plurality of upwardly curved portions with respective curvature in the same direction along a longitudinal direction of the profile and transition portions between said upwardly curved portions in its unloaded condition.
  • the profile may be supported at more than two suspension points.
  • the curved portions may have a uniform radius.
  • a radius of curvature of a first curved portion may be different from a radius of curvature of a second of curved portion.
  • Said at least one profile may be a main profile adapted to be suspended to a ceiling structure or adapted to be suspended by another profile.
  • the profile may be suspended to the ceiling structure by means of hangers.
  • the profile may be suspended by profiles attached to two opposite walls.
  • Said at least one profile may be a transverse profile adapted to be suspended by another profile.
  • a transverse profile is normally only suspended at each end.
  • the end portions of an transverse profile is resting on a first and a second main profile, respectively, and the transverse portion has a curved portion extending between the first and second main profiles by which the transverse profile is supported in its unloaded condition.
  • Said at least one profile may be fixed directly to a ceiling structure of a building.
  • the profile may be in abutment with the ceiling.
  • Said at least one profile may comprise a web and a flange.
  • the flange may be adapted to support said at least one tile.
  • an edge portion of the ceiling tile may rest on the flange.
  • the ceiling tile may be provided with a groove in which the flange is inserted such that the profile supports the ceiling tile.
  • Said at least one profile may further comprise a capping enclosing at least a portion of the flange.
  • the capping may be used in order to pre-stress the profile such that at least one curved portion is formed. Further, the capping improves the visual appearance of the grid as seen from inside the room and hides parts of the profile.
  • Said at least one profile may be an inverted T-profile.
  • the inverted T-profile includes a web extending in a vertical direction and a flange extending in a horizontal direction as seen in cross-section.
  • the present invention is realised by a method for providing a profile for a suspended ceiling, comprising providing a profile, and forming at least one upwardly curved portion of the profile by plastically deforming at least one portion of the profile, such that the profile in a loaded condition when forming part of suspended ceiling extends such that a deflection of said at least one profile is less than a predetermined value.
  • the deflection of said at least one profile in the loaded condition is less than a distance between two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the deflection of said at least one profile in the loaded condition is less than the distance between two adjacent suspension points of said at least one profile divided by a factor of 500.
  • Such a profile having at least one upwardly curved portion extends in the loaded condition such that the deflection is less than a predetermined value determined according to a standard for suspended ceilings.
  • Such an upwardly curved profile can carry a larger load without resulting in a deflection exceeding the allowed value according to various standards such as EN 13964.
  • the material thickness of the profile can be reduced while deflection is maintained to an acceptable level. Thereby, material consumption of the profile may be reduced.
  • the curvature required in the unloaded condition such that the profile, in the loaded condition, extends such that the deflection is less, for example, than the distance between two suspension points divided by a factor of 300.
  • the curvature in the unloaded condition of the profile is calculated such that the deflection of the profile in the loaded condition of the profile is less than a maximum allowed value, for example the deflection is less than the distance between two suspension points divided by a factor of 300.
  • the present invention is realised by a method for providing a profile for a suspended ceiling, comprising providing a profile having a web and a flange, pre-stressing the profile by attaching a capping to the flange, wherein the length of the capping is less than the length of the profile.
  • the profile is pre-stressed by attaching the capping to the flange such that at least one upwardly curved portion is formed. By pre-stressing the profile, the profile is elastically deformed.
  • the profile may form a part of a grid for a suspended ceiling.
  • Such a pre-stressed profile can carry a larger load without resulting in a deflection exceeding the allowed value according to various standards such as EN 13964.
  • the material thickness of the profile can be reduced while deflection is maintained to an acceptable level. Thereby, material consumption of the profile may be reduced.
  • an advantageous stress distribution is obtained. Tensile stress is formed at the upper parts of the profile, which improves the stability of the profile and reduces the risk of lateral-torsional buckling.
  • the profile is both plastically and elastically deformed.
  • the step of providing a profile may comprise roll forming at least one sheet blank into a profile having a web and a flange, wherein after the profile has been provided, at least one upwardly curved portion is formed by a second roll forming step.
  • the method may further comprise providing a capping and attaching the capping to the flange.
  • the capping may be attached to the flange after the profile has been provided with at least one curved portion.
  • the capping may already be attached to the flange before the profile is provided with at least one curved portion.
  • the step of attaching the capping to the flange may comprise folding the capping over at least a portion of the flange.
  • the step of attaching the capping to the flange may comprise folding, gluing, welding and/or riveting the capping to the flange.
  • the present invention is realised by a profile for forming part of a grid for suspended ceiling.
  • the profile is adapted to be supported at at least two suspension points.
  • the profile comprises in an unloaded condition at least one upwardly curved portion, such that, in a loaded condition of said profile, said profile extends such that a deflection of said profile is less than a predetermined value.
  • the deflection of said at least one profile in the loaded condition is less than a distance between two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the deflection of said at least one profile in the loaded condition is less than the distance between two adjacent suspension points of said at least one profile divided by a factor of 500.
  • Fig. 1 shows schematically a suspended ceiling 1.
  • the suspended ceiling 1 is attached to the ceiling structure of the building.
  • the suspended ceiling 1 comprises a grid 10 and a plurality of ceiling tiles 5.
  • the grid 10 comprises one or more profiles 2, 3.
  • the grid 10 comprises profiles of two types; main profiles 2 extending in a first direction and transverse profile 3 extending in a direction perpendicular to the first direction.
  • the main profiles 2 are suspended to the ceiling structure by means of suspension means 4, for example hangers.
  • the main profiles may be suspended by profiles attached to two opposite walls along the walls.
  • the transverse profiles 3 are suspended by the main profiles 2.
  • the main profiles 2 support both the ceiling tiles 5 forming the ceiling and the transverse profiles 3, and any additional load.
  • additional load may be various equipments such as lightning devices, ventilation equipments, inspection openings, detectors, cable trays, loudspeakers, signs, sprinklers etc.
  • load is meant both load resulting from the own weight of the profile and applied load in form of ceiling tiles, other profiles, additional load as described above etc.
  • the ceiling tiles 5 may be made of man-made mineral fibre, such as a compressed mineral fibre material. More specifically, the mineral fibre material may be mineral wool, especially glass wool. In addition to the mineral fibre material, the ceiling tiles 5 comprise a binder. The ceiling tiles 5 may further comprise at least one surface layer.
  • the profile 2, 3 in figs. 2a-b may be both a main profile and a transverse profile.
  • the profile 2, 3 is in the shown embodiment an inverted T-profile, having an inverted T-shaped cross-section as shown in fig. 2b .
  • the profile 2, 3 has an elongated extension.
  • the profile 2, 3 comprises a web 6, a flange 7 and a capping 8.
  • the web 6 is extending in vertical direction.
  • the web 6 comprises a bulb 9.
  • the flange 7 is extending in the horizontal direction.
  • the flange 7 is adapted to support ceiling tiles 5. An edge portion of the ceiling tile 5 may rest on the flange 7.
  • the ceiling tile 5 is provided with a groove in which the flange 7 is inserted such that the profile 2, 3 supports the ceiling tile 5.
  • the capping 8 is attached to the flange 7.
  • the capping 8 is extending along the flange 7.
  • the capping 8 is folded over at least a portion of the flange 7.
  • the capping 8 is covering at least a surface of the flange 7 facing the room when being suspended. Thereby, the underside of the flange 7 is not visible from the room, only the capping 8.
  • the capping 8 may be attached to the flange 7 by means of folding, gluing, welding and/or riveting the capping to the flange, or a combination thereof.
  • the profile 2, 3 may be produced in a roll forming operation in which two sheets of metal is folded into a profile 2, 3.
  • a load on a profile 2, 3 will cause deflection of the profile, which is shown in fig. 3 .
  • the deflection f is proportional to the load and strongly depends on the distance L between the points where the profile is supported. Load includes the own weight of the profile 2, 3, ceiling tiles 5 supported by the profile 2, 3, other profiles supported by the profile, additional loads such as lightning devices, ventilation equipments, inspection openings, detectors, cable trays, loudspeakers, signs, sprinklers etc.
  • the total load deforms the profile 2, 3 such that deflection of the profile 2, 3 occurs.
  • Fig. 3 shows a conventional profile in a loaded condition. In its unloaded condition, the conventional profile is extending along a straight line. In its loaded condition, the profile becomes slightly curved as shown in fig. 3 .
  • the deflection f is measured as a maximum distance f between the profile and an imaginary straight line extending between the suspension points of the profile.
  • the deflection for example measured in mm
  • a predetermined value for example less than the distance L between the suspension points, for example measured in mm
  • the maximum deflection allowed is 4 mm.
  • Figs. 4a-4c shows a profile 3 according to a first embodiment of the invention.
  • the profile 3 in figs. 4a-c is a transverse profile 3 adapted to be supported by main profiles 2 at its ends.
  • the profile 3 is in its unloaded condition.
  • the profile 3 is plastically and/or elastically deformed such that it is slightly curved in its unloaded condition.
  • the profile 3 thereby has one upwardly curved portion 11 extending along its longitudinal extension.
  • the curved portion 11 is extending between the suspension points 14, 15.
  • the profile 3 has a curvature in the same direction along its entire longitudinal extension. In this embodiment, the profile 3 has a constant curvature along its longitudinal extension. However, in other embodiments, the profile may have a varying curvature along its longitudinal extension.
  • the profile 3 is upwardly curved in a vertical direction, i.e. in a plane perpendicular to the plane of the suspended ceiling 1 when mounted.
  • the profile 3 is concavely curved in an upward direction as viewed from a side of the profile adapted to face the interior of a room when mounted in a suspended ceiling.
  • the profile 3 In its unloaded condition, as shown in fig. 4a , the profile 3 is curved such that the maximum distance between an imaginary straight line between the end points of the profile and the curved portion of the profile 3 is do.
  • Fig. 4b shows the transverse profile 3 in fig. 4a when being suspended in a suspended ceiling 1.
  • the profile 3 is suspended by main profiles 2. Each end of the profile 3 rests on a main profile 2.
  • the load of the own weight of the profile 3 may reduce the curvature of profile 3 and make the profile 3 slightly more straight.
  • the curvature of the profile 3 may be reduced by the own load of the profile 3 such that the maximum distance d 1 between an imaginary straight line between the suspension points and the profile 3 is less than d 0 .
  • Fig. 4c shows the transverse profile 3 in a loaded condition when forming part of a grid 10 for suspended ceiling 1.
  • the load deforms the profile 3 such that the profile assumes an essentially linear extension.
  • the load includes the own weight of the profile 3 and external load applied, such as weight of ceiling tiles 5.
  • the load deflects the profile 3 such that the curvature becomes straightened or deflected.
  • essentially linear extension is meant that the maximum deflection f is less than a predetermined value, for example the distance L measured in mm between the two adjacent suspension points 14, 15 of the profile 3 divided by a factor of 300.
  • a predetermined value for example the distance L measured in mm between the two adjacent suspension points 14, 15 of the profile 3 divided by a factor of 300.
  • the profile 3 in its loaded condition may be straight, or may be slightly curved or deflected, as long as the deflection does not exceed the predetermined value, for example the distance L between two adjacent suspension points 14, 15 of the profile 3 divided by a factor of 300.
  • the profile 3 may be both slightly convexly curved or slightly concavely curved in its loaded condition. Deflection around L/400 is possible to for the human eye to detect. By keeping the deflection below L/500, the human eye will not detect the deflection.
  • the distance between the suspension points for the transverse profile 3 in fig. 4c may be 1200 mm.
  • the transverse profile 3 may be curved such that in its unloaded condition, the maximum distance do between the profile 3 and an imaginary straight line extending between the ends of the profile 3 is 4 mm.
  • the transverse profile 3 may carry a load being doubled compared to a conventional straight profile without increasing the deflection in its loaded condition.
  • the profile can carry a load being more than doubled still fulfilling the deflection requirement.
  • Figs. 5a-c discloses a profile 2 according to a second embodiment of the invention.
  • the profile is a main profile 2 being suspended to the ceiling structure at two suspension points 16, 17 by means of suspension means 4.
  • the main profile 2 may be supported by profiles (not shown), for example profiles attached to two opposite walls.
  • the profile 2 is in its unloaded condition before being suspended to the ceiling.
  • the profile 2 is plastically and/or elastically deformed such that it is slightly curved in its unloaded condition.
  • the profile 2 thereby has one upwardly curved portion 21 extending along its longitudinal extension.
  • the curved portion 21 will be extending between two suspension points 16, 17.
  • the profile 2 has a curvature in the same direction along its entire longitudinal extension.
  • the profile 2 has a constant curvature along its longitudinal extension.
  • the profile may have a varying curvature along its longitudinal extension.
  • the profile 2 is upwardly curved in a vertical direction, i.e. in plane perpendicular to the plane of the suspended ceiling 1.
  • the profile 2 is concavely curved in an upward direction as viewed from a side of the profile adapted to face the interior of a room when mounted in a suspended ceiling.
  • the profile 2 In its unloaded condition, as shown in fig. 5a , the profile 2 is curved such that the maximum distance between an imaginary straight line extending between end points of the profile 2 and the curved portion of the profile 2 is do.
  • Fig. 5b shows the main profile 2 in fig. 5a when being suspended to the ceiling structure by suspension means 4.
  • the profile 2 is suspended at its respectively ends 16, 17.
  • the profile 2 is upwardly curved.
  • the load of the own weight of the profile 3 may reduce the curvature of profile 2 to some extent and make the profile 2 more straight.
  • the curvature of the profile 2 may be reduced by the own load of the profile 2 such that the maximum distance d 1 between an imaginary straight line between the suspension points and the profile 2 is less than d 0 .
  • Fig. 5c shows the main profile 2 in a loaded condition when forming part of a grid 10 for a suspended ceiling 1.
  • the load deforms the profile 2 such that the profile 2 assumes an essentially linear extension or deflected extension.
  • the load includes the own weight of the profile 2 and external load applied, such as weight of ceiling tiles 5 and of transverse profiles 3 suspended by the main profile 2.
  • the load deflects the profile 2 such that the curvature is straightened or deflected downwards.
  • essentially linear extension is meant that the maximum deflection is equal or is less than a predetermined value, for example the distance L measured in mm between the two adjacent suspension points 16, 17 of the profile 2 divided by a factor of 300.
  • a predetermined value for example the distance L measured in mm between the two adjacent suspension points 16, 17 of the profile 2 divided by a factor of 300.
  • the profile 2 in its loaded condition may be straight, or may be slightly curved, as long as the deflection f does not exceed the predetermined value, for example the distance L measured two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the profile 2 may be both slightly convexly curved or slightly concavely curved in its loaded condition.
  • the distance between the suspension points 16, 17 for the main profile 2 in fig. 4c may be 1200 mm.
  • the main profile 2 may be curved such that in its unloaded condition, the maximum distance d between the profile 2 and an imaginary straight line extending between the ends of the profile 2 is 4 mm.
  • the main profile 2 may carry a load being doubled compared to a conventional straight profile without increasing the deflection in its loaded condition.
  • the profile can carry a load being more than doubled still fulfilling the deflection requirement.
  • Figs. 6a-c discloses a profile 2 according to a third embodiment of the invention.
  • the profile is a main profile 2 being suspended to the ceiling structure at three suspension points 16, 17, 18 by means of suspension means 4, for example hangers.
  • the main profile 2 may be supported by profiles attached to two opposite walls at its ends (not shown).
  • the profile 2 is in its unloaded condition before being suspended to the ceiling.
  • the profile 2 is plastically and/or elastically deformed such that it is slightly curved in its unloaded condition.
  • the profile 2 thereby has one upwardly curved portion 21 extending along its longitudinal extension.
  • the curved portion 21 will be extending between three suspension points 16, 17, 18.
  • the profile 2 has a curvature in the same direction along its entire longitudinal extension.
  • the profile 2 has a constant curvature along its longitudinal extension.
  • the profile may have a varying curvature along its longitudinal extension.
  • the profile 2 is upwardly curved in a vertical direction, i.e. in plane perpendicular to the plane of the suspended ceiling 1 when mounted.
  • the profile 2 is concavely curved in an upward direction as viewed from a side of the profile adapted to face the interior of a room when mounted in a suspended ceiling.
  • the profile 2 In its unloaded condition, as shown in fig. 6a , the profile 2 is curved such that the maximum distance between an imaginary straight line extending between end points of the profile 2 and the curved portion of the profile 2 is do.
  • Fig. 6b shows the main profile 2 in fig. 6a when being suspended to the ceiling structure by suspension means 4.
  • the profile 2 is suspended at its respectively ends.
  • the profile 2 is upwardly curved.
  • the load of the own weight of the profile 2 may reduce the curvature of profile 2 to some extent and make the profile 2 more straight.
  • the curvature of the profile 2 may be reduced by the own load of the profile 2 such that the maximum distance d 1 between an imaginary straight line between the suspension points and the profile 2 is less than d 0 .
  • the profile 2 When being suspended to the ceiling structure but still not carrying any additional load, as shown in fig. 6b , the profile 2 may not be supported at the second suspension point 17, due to the curvature of the profile 2.
  • Fig. 6c shows the main profile 2 in a loaded condition when forming part of a grid 10 for a suspended ceiling 1.
  • the load deforms the profile 2 such that the profile 2 assumes an essentially linear extension or deflected extension.
  • the load includes the own weight of the profile 2 and external load applied, such as weight of ceiling tiles 5 and of transverse profiles 3 suspended by the main profile 2.
  • the load deflects the profile 2 such that the curvature is straightened or deflected downwards.
  • essentially linear extension is meant that the maximum deflection f is less than a predetermined value, for example the distance L measured in mm between the two adjacent suspension points 16, 17 of the profile 2 divided by a factor of 300.
  • a predetermined value for example the distance L measured in mm between the two adjacent suspension points 16, 17 of the profile 2 divided by a factor of 300.
  • the profile 2 in its loaded condition may be straight, or may be slightly curved, as long as the deflection f does not exceed the predetermined value, for example the distance L measured two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the profile 2 may be both slightly convexly curved or slightly concavely curved in its loaded condition.
  • the distance between the suspension points 16, 17 for the main profile 2 in fig. 4c may be 1200 mm.
  • the main profile 2 may be curved such that in its unloaded condition, the maximum distance d between the profile 2 and an imaginary straight line extending between the ends of the profile 2 is 4 mm.
  • the main profile 2 may carry a load being more than doubled compared to a conventional straight profile without increasing the deflection in its loaded condition.
  • Figs. 7a-c discloses a profile 2 according to a fourth embodiment of the present invention.
  • the profile 2 in figs. 7a-c is a main profile 2.
  • the main profile 2 In its unloaded condition before being suspended to the ceiling, as shown in fig. 7a , the main profile 2 includes two upwardly curved end portions 21, 22 and a downwardly curved transition portion 23 extending between said end portions.
  • the curved end portions 21, 22 are concavely curved in an upward direction in the vertical plane as viewed from a side of the profile adapted to face the interior of a room when mounted in a suspended ceiling.
  • the transition portion 23 is convexly curved in an upward direction in the vertical plane as viewed from a side of the profile adapted to face the interior of a room when mounted in a suspended ceiling.
  • the profile 2 is adapted to be suspended to the ceiling structure at three suspension points 16, 17, 18 by means of suspension means 4, for example hangers.
  • the two upwardly curved end portions have a curvature in the same direction.
  • the downwardly curved transition portion has a curvature in the opposite direction as the end portions.
  • the radius of curvature of the two curved end portions may be equal. Alternatively, the radius of curvature may differ.
  • the radius of curvature of the transition portion may differ from the radius of curvature of the two curved end portions.
  • the profile 2 is elastically and/or plastically deformed such that the two curved portions 21, 22 are formed.
  • the profile 2 comprises three curved portions 21, 22, 23.
  • the first curved end portion 21 is extending between the first suspension point 16 and a point adjacent the second suspension point 17.
  • the second curved end portion 22 is extending between the third suspension point 18 and a point adjacent the second suspension point 17.
  • the second suspension point is arranged at a point of the transition portion 23 wherein the tangent is horizontal.
  • the transition portion 23 is extending between the first and second curved end portions 21, 22.
  • the maximum distance between an imaginary line extending between the ends of the profile and the profile is do.
  • Fig. 7b shows the main profile 2 in fig. 7a when being suspended to the ceiling structure by suspension means 4.
  • the profile 2 is suspended to the ceiling structure at three suspension points 16, 17, 18.
  • the three suspension points 16, 17, 18 are arranged at an equal distance from each other.
  • the load of the own weight of the profile 2 may reduce the curvature of profile 2 to some extent and make the profile 2 slightly more straight.
  • the maximum distance d 1 between an imaginary line extending between the ends of the profile and the profile is less than do.
  • Fig. 7c shows the main profile 2 in a loaded condition when forming part of a grid 10 for a suspended ceiling 1.
  • the load deforms the profile 2 such that the profile 2 assumes an essentially linear extension.
  • the load includes the own weight of the profile 2 and external load applied, such as weight of ceiling tiles 5 and of transverse profiles 3 suspended by the main profile 2.
  • the load deflects the profile 2 such that the two curved portions 21, 22 become straightened.
  • essentially linear extension is meant that the maximum deflection f is less than a predetermined value, for example the distance L measured in mm between two adjacent suspension points of the profile divided by a factor of 300.
  • a predetermined value for example the distance L measured in mm between two adjacent suspension points of the profile divided by a factor of 300.
  • the profile 2 in its loaded condition may be straight, or may have slightly curved portions, as long as the deflection f does not exceed the predetermined value, for example the distance L measured in mm between two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the profile 2 may have both slightly convexly curved portions or slightly concavely curved portions in its loaded condition.
  • Figs. 8a-c discloses a profile 2 according to a fifth embodiment of the present invention.
  • the profile in figs. 8a-c is a main profile 2 including five curved portions 31, 32, 33, 34, 35.
  • the main profile 2 includes three upwardly curved portions 31, 32, 33 and two downwardly curved transition portions 34, 35.
  • the upwardly curved portions 31, 32, 33 are concavely curved in an upward direction in the vertical plane as viewed from a side of the profile adapted to face the interior of a room when mounted in a suspended ceiling.
  • the downwardly curved transition portions 34, 35 have a curvature in the opposite direction as the upwardly curved portions 31, 32, 33.
  • the profile 2 is adapted to be suspended to the ceiling structure at four suspension points 16, 17, 18, 19 by means of suspension means 4 for example hangers.
  • the profile 2 is elastically and/or plastically deformed such that three curved portions 31, 32, 33 are formed.
  • the distance ⁇ between two adjacent suspension points 16, 17, 18, 19 is equal for all suspension points.
  • the three upwardly curved portions have a curvature in the same direction in the longitudinal direction. However, the three upwardly curved portions have different radius of curvature.
  • the maximum distance between the profile and an imaginary straight line extending between the suspension points is d 0a .
  • the maximum distance between the profile and an imaginary straight line extending between the suspension points is d 0b , which is less than d 0a .
  • the radius of curvature of the second curved portion is smaller than the radius of curvature of the first and third curved portion.
  • Fig. 8b shows the main profile 2 in fig. 8a when being suspended to the ceiling structure by suspension means 4.
  • the profile 2 is suspended to the ceiling structure at four suspension points 16, 17, 18, 19.
  • the four suspension points 16, 17, 18, 19 divide the profile 2 into three sections.
  • the four suspension points 16, 17, 18, 19 are arranged at an equal distance ⁇ from each other.
  • the first suspension point 16 is arranged at the first end of the profile 2.
  • the second suspension point 17 is arranged at a first transition portion 34 extending between the first and second upwardly curved portions.
  • the third suspension point is arranged at a second transition 35 portion extending between the second and third upwardly curved portions.
  • the fourth suspension point 19 is arranged at the second end of the profile 2.
  • the profile 2 When being suspended, the profile 2 comprises three upwardly curved portions 31, 32, 33.
  • the load of the own weight of the profile 2 may reduce the curvature of profile to some extent and make the profile slightly more straight, i.e. the maximum distance between the profile and an imaginary straight line extending between the suspension points is less than d 0a and d 0b , respectively.
  • the maximum distance between the profile and an imaginary straight line extending between the suspension points is d 1a .
  • the maximum distance between the profile and an imaginary straight line extending between the suspension points is d 1b , which is less than d 1a .
  • Fig. 8c shows the main profile 2 in a loaded condition when forming part of a grid 10 for a suspended ceiling 1.
  • the load deforms the profile 2 such that the profile 2 assumes an essentially linear extension.
  • the load includes the own weight of the profile 2 and external load applied, such as weight of ceiling tiles 5 and of transverse profiles 3 suspended by the main profile 2.
  • the load deflects the profile 2 such that the three curved portions 21, 22, 23 become straightened or deflected.
  • the maximum deflection f is less than a predetermined value, for example the distance L measured in mm between two adjacent suspension points of the profile 2 divided by a factor of 300.
  • a predetermined value for example the distance L measured in mm between two adjacent suspension points of the profile 2 divided by a factor of 300.
  • the profile 2 in its loaded condition may be straight, or may have slightly curved portions, as long as the deflection f does not exceed the predetermined value, for example the distance L measured in mm between two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the profile 2 may have both slightly convexly curved portions or slightly concavely curved portions in its loaded condition.
  • the deflection f b of the second portion 32 is less than the deflection f a of the first and third portion 31, 33.
  • Figs. 9a-c discloses a profile 2 according to a sixth embodiment of the present invention.
  • the profile in figs. 9a-c is a main profile 2 including five curved portions 31, 32, 33, 34, 35.
  • the main profile 2 includes three upwardly curved portions 31, 32, 33 and two downwardly curved transition portions 34, 35.
  • the upwardly curved portions 31, 32, 33 are concavely curved in an upward direction in the vertical plane as viewed from a side of the profile adapted to face the interior of a room when mounted in a suspended ceiling.
  • the profile 2 is adapted to be suspended to the ceiling structure at four suspension points 16, 17, 18, 19 by means of suspension means 4, for example hangers.
  • the profile 2 is elastically and/or plastically deformed such that three curved portions 21, 22, 23 are formed.
  • the embodiment shown in figs. 9a-c differs from the embodiment shown in figs. 8a-c in that the distance between adjacent suspension points 16, 17, 18, 19 differs.
  • the distance between the first and second suspension point 16, 17 is ⁇ 1 .
  • the distance between the third and fourth suspension point 18, 19 is ⁇ 1 .
  • the distance between the second and third suspension point 17, 18 is ⁇ 2 which is larger than ⁇ 1 .
  • the maximum distance between the profile and an imaginary straight line extending between the suspension points is d 0a .
  • the maximum distance between the profile and an imaginary straight line extending between the suspension points is d 0b , which is larger than d 0a .
  • a ratio defined as the deflection d 0a , d 0b divided by the length ⁇ 1 , ⁇ 2 between respective suspension points is the same for the first, second and third upwardly curved portions 31,32, 33.
  • Fig. 9b shows the main profile 2 in fig. 9a when being suspended to the ceiling structure by suspension means 4.
  • the profile 2 is suspended to the ceiling structure at four suspension points 16, 17, 18, 19.
  • the second suspension point 17 is arranged at a first transition portion extending between the first and second upwardly curved portions.
  • the third suspension point is arranged at a second transition portion extending between the second and third upwardly curved portions.
  • the fourth suspension point 19 is arranged at the second end of the profile 2.
  • the profile 2 When being suspended, the profile 2 comprises three upwardly curved portions 31, 32, 33.
  • the load of the own weight of the profile 2 may reduce the curvature of profile to some extent and make the profile slightly more straight, i.e. the maximum distance d 1a , d 1b between the profile and an imaginary straight line extending between the suspension points is less than d 0a , d 0b , respectively.
  • the maximum distance between the profile and an imaginary straight line extending between the suspension points is d 1a .
  • the maximum distance between the profile and an imaginary straight line extending between the suspension points is d 1b , which is larger than d 1a .
  • a ratio defined as the deflection d 0a , d 0b divided by the length ⁇ 1 , ⁇ 2 between respective suspension points is the same for the first, second and third upwardly curved portions 31,32, 33.
  • Fig. 9c shows the main profile 2 in a loaded condition when forming part of a grid 10 for a suspended ceiling 1.
  • the load deforms the profile 2 such that the profile 2 assumes an essentially linear extension.
  • the load includes the own weight of the profile 2 and external load applied, such as weight of ceiling tiles 5 and of transverse profiles 3 supported by the main profile 2.
  • the load deflects the profile 2 such that the three curved portions 21, 22, 23 become straightened or deflected.
  • essentially linear extension is meant that the maximum deflection f is less than a predetermined value, for example the distance L measured in mm between two adjacent suspension points of the profile 2 divided by a factor of 300.
  • a predetermined value for example the distance L measured in mm between two adjacent suspension points of the profile 2 divided by a factor of 300.
  • the profile 2 in its loaded condition may be straight, or may have slightly curved portions, as long as the deflection does not exceed the predetermined value, for example the distance L measured in mm between two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the profile 2 may have both slightly convexly curved portions or slightly concavely curved portions in its loaded condition. In fig.
  • the deflection f b of the second portion 32 is larger than the deflection f a of the first and third portion 31, 33.
  • a ration defined as the deflection f a , f b divided by the length ⁇ 1 , ⁇ 2 between respective suspension points is the same for the first, second and third upwardly curved portions 31, 32, 33.
  • the profile 2, 3 may have a plurality of curved portions.
  • the portions may be concavely curved in an upward direction in the vertical plane.
  • the profile 2, 3 When being suspended to a ceiling structure and forming part of a suspended ceiling 1, the profile 2, 3 have an essentially linear extension.
  • essentially linear extension is meant that the maximum deflection is less than a predetermined value, for example the distance L measured in mm between two adjacent suspension points of the profile divided by a factor of 300. This implies that the profile 2, 3 in its loaded condition may be straight, or may have slightly curved portions. As long as the maximum deflection is not exceeded, the profile 2, 3 may have either slightly convexly curved portions or slightly concavely curved portions in its loaded condition.
  • the profile 2, 3 with at least one upwardly curved portion in its unloaded position, it is possible to control the deflection of the profile 2, 3. It is thus possible to adapt the curvature of the curved portions and the overall shape of the profile 2, 3 in the vertical direction to the loads that is to be applied to the profile 2, 3 such that the deflection f of the profile 2, 3 in its loaded condition is less than a predetermined value, for example the distance L measured in mm between two adjacent suspension points of said at least one profile divided by a factor of 300. Load applied to the profile 2, 3 may be increased, or the material thickness of the profile 2, 3 may be reduced, while maintaining an acceptable deflection.
  • a predetermined value for example the distance L measured in mm between two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the profile 2 fixed directly to the ceiling structure of the building.
  • the profile may be a main profile or a transverse profile.
  • the profile 2 In its unloaded condition, when not affected by the gravity resulting from the own weight of the profile 2 or any additional load in the vertical direction, the profile 2 is upwardly curved, as shown in fig. 10a .
  • the profile2 is plastically and/or elastically deformed such that it is slightly curved in its unloaded condition.
  • the profile 2 thereby has one upwardly curved portion 11 extending along its longitudinal extension.
  • the curved portion 11 is extending between the suspension or fastening points 14, 15.
  • the profile 2 has a curvature in the same direction along its entire longitudinal extension.
  • the profile 2 has a constant curvature along its longitudinal extension.
  • the profile may have a varying curvature along its longitudinal extension.
  • the profile 2 is upwardly curved in a vertical direction, i.e. in a plane perpendicular to the plane of the suspended ceiling 1 when mounted.
  • the profile 2 is concavely curved in an upward direction as viewed from a side of the profile adapted to face the interior of a room when mounted in a suspended ceiling. The maximum distance between an imaginary line extending between the ends of the profile and the profile is do.
  • the profile 2 When the profile 2 is suspended and fixed to the ceiling structure, as shown in fig. 10b , the profile 2 will be forced to become straightened.
  • the profile 2 when suspended will have an essential linear extension, preferably parallel to the ceiling structure.
  • the profile 2 may directly abut the ceiling structure, or may be arranged at distance from the ceiling structure.
  • a spacer may be arranged between the profile 2 and the ceiling structure.
  • the profile 2 may carry an increased load without reaching a critical deflection.
  • the material thickness of the profile may be reduced without reaching maximum allowed deflection.
  • Fig. 10c shows the main profile 2 in a loaded condition when forming part of a grid 10 for a suspended ceiling 1.
  • the load deforms the profile 2 such that the profile 2 assumes an essentially linear extension or deflected extension.
  • the load includes the own weight of the profile 2 and external load applied, such as weight of ceiling tiles 5 and of transverse profiles 3 suspended by the main profile 2.
  • the load deflects the profile 2 such that the curvature is straightened or deflected downwards.
  • essentially linear extension is meant that the maximum deflection f is less than a predetermined value, for example the distance L measured in mm between the two adjacent suspension points 16, 17 of the profile 2 divided by a factor of 300.
  • a predetermined value for example the distance L measured in mm between the two adjacent suspension points 16, 17 of the profile 2 divided by a factor of 300.
  • the profile 2 in its loaded condition may be straight, or may be slightly curved, as long as the deflection f does not exceed the predetermined value, for example the distance L measured two adjacent suspension points of said at least one profile divided by a factor of 300.
  • the profile 2 may be both slightly convexly curved or slightly concavely curved in its loaded condition.
  • profiles 2, 3 described above with reference to figs. 4a-c , 5a-c , 6a-c , 7a-c , 8a-c , 9a-c , and 10a-c all are adapted to form part of a grid 10 for a suspended ceiling 1 as described above in connection with fig. 1 .
  • transverse profiles 3 comprising at least one curved portion may be combined with conventional profiles as well as main profiles 2 comprising at least one curved portion, and the opposite.
  • the curved portion or portions of the profile may be achieved by curving the profile, for example in a roll forming operation, or by pre-stressing the profile.
  • the profile 2, 3 is formed from a sheet blank.
  • the sheet blank is made of metal, for example steel or aluminium.
  • the sheet blank is fed between successive pairs of rolls that progressively bend, fold and form the sheet blank until the desired shape and cross section of the profile 2, 3 is obtained.
  • the sheet blank is folded such that a profile 2, 3 having a web 6 and flange 7 is formed.
  • the profile 2, 3 is shaped into an inverted T-profile.
  • pressure is applied to the profile 2, 3 such that a curved portion is formed, which is shown in fig. 11 .
  • the profile 2, 3 is fed between a pressure roll 31 and a pair of opposite rolls 32, 33, wherein the pressure roll 31 applies pressure on the profile 2, 3 such that a curved portion is formed.
  • the profile 2, 3 is thereby plastically deformed.
  • a uniform pressure may be applied, such that a uniform curvature is obtained.
  • a profile 2, 3 according to the embodiments shown in figs. 4a-c , 5a-c , 6a-c and 10a-c are obtained.
  • a non-uniform pressure may be applied on the profile 2, 3.
  • a profile 2, 3 having a non-uniform curvature and different radius of curvature.
  • a profile 2, 3 according to the embodiments which are shown in figs. 7a-c , 8a-c and 9a-c may be formed by applying pressure to a first portion of the profile 2, 3 in a first direction, then applying pressure to a second portion of the profile 2, 3 in a direction opposite to the first direction, and then applying pressure to a third portion of the profile 2, 3 in the first direction. After a desired shape of the profile 2, 3 is obtained, the profile is cut into a desired length.
  • the profile 2, 3 may also be provided with a capping 8, before or after the curved portion is formed.
  • the profile 2, 3 may be formed in a separate step from the operation for forming curved portions, and that the profile 2, 3 may be formed in a different operation than by roll forming, for example by extruding.
  • An alternative solution to the above described method is to pre-stress the profile.
  • the profile 2, 3 By pre-stressing the profile 2, 3, the profile 2, 3 elastically deformed.
  • the profile 2, 3 is elastically deformed such that a curved portion is formed.
  • the profile 2, 3 may be pre-stressed by means of a capping 8 attached to the flange 7 of the profile 2, 3.
  • the profile 2, 3 having a web 6 and a flange 7 is formed in any conventional way, such as by roll forming as described above.
  • a capping 8 is adapted to enclose at least a portion of the flange 7, especially a side of the flange 7 adapted to face the room when the profile 2, 3 is suspended to the ceiling structure of the room.
  • the capping 8 is provided in form of an elongated sheet or strip of metal which is folded around the flange 7 of the profile 2, 3.
  • the capping 8 is attached to the flange 7 by means of folding, gluing, welding and/or riveting the capping to the flange. A combination of the alternatives mentioned is also possible.
  • the length of the capping 8 in the longitudinal direction is less than the length of the profile 2, 3 onto which the capping 8 is to be attached.
  • the ends of the profile 2, 3 and the capping 8 are aligned such that the capping 8 is to be extending along the entire length of the profile 2, 3.
  • a first end of the capping 8 is attached to a first end of the profile 2, 3, and a second end of the capping 8 is attached to a second end of the profile 2, 3.
  • the rest of the capping 8 is then adhered to the flange 7 of the profile 2, 3.
  • the profile 2, 3 is pre-stressed such that a curved portion is formed.
  • a profile 2, 3 according to the embodiments disclosed in figs. 4a-c , 5a-c , 6a-c and 10a-c is obtained.
  • the profile 2, 3 will have a uniform curvature.
  • the curvature of the curved portions in the figures is highly exaggerated in order to make the curvature visible.
  • the maximum distance d between the curved portion an imaginary straight line could be for example in the range of 2-4 mm.
  • transverse profile also may be provided with more than one curved portion, although not shown in the drawings.
  • the profile has been an inverted T-profile.
  • a person skilled in the art contemplates that the invention also may be applied to a profile of any other shape, for example, a L-shaped profile, a I-shaped profile, a Z-shaped profile etc.
  • the profiles are provided with a bulb.
  • the invention also may be applied to a profile without any bulb.
  • main profile instead of being suspended by hangers or directly to the ceiling structure may be suspended by another profile, for example profiles attached to two opposite walls, and be provided with curved portion/portions in the manner described above.
  • the profile is shown as slightly curved when it is suspended but not carrying any additional load in addition to the own weight of the profile, as shown in figs. 4b , 5b , 6b , 7b , 8b , and 9b .
  • the own weight of the profile may result in that the profile has an essentially linear extension when being suspended.
  • the additional load may result in a deflection not exceeding the length of the profile L divided by 300.

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  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
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EP11179024.2A 2011-08-26 2011-08-26 Plafond suspendu et procédé pour fournir un profilé pour un plafond suspendu Active EP2562323B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DK11179024.2T DK2562323T3 (en) 2011-08-26 2011-08-26 Hanging ceiling and method for providing a profile for a hanging ceiling
PL11179024T PL2562323T3 (pl) 2011-08-26 2011-08-26 Podwieszany sufit i sposób zapewniania profilu podwieszanego sufitu
EP11179024.2A EP2562323B1 (fr) 2011-08-26 2011-08-26 Plafond suspendu et procédé pour fournir un profilé pour un plafond suspendu
PCT/EP2012/066441 WO2013030091A1 (fr) 2011-08-26 2012-08-23 Faux plafond et procédé de construction d'un profilé pour un faux plafond
EA201490442A EA201490442A1 (ru) 2011-08-26 2012-08-23 Подвесной потолок и способ получения профиля для подвесного потолка
ZA2014/02146A ZA201402146B (en) 2011-08-26 2014-03-24 A suspended ceiling and a method for providing a profile for a suspended ceiling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11179024.2A EP2562323B1 (fr) 2011-08-26 2011-08-26 Plafond suspendu et procédé pour fournir un profilé pour un plafond suspendu

Publications (2)

Publication Number Publication Date
EP2562323A1 true EP2562323A1 (fr) 2013-02-27
EP2562323B1 EP2562323B1 (fr) 2018-07-04

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EP11179024.2A Active EP2562323B1 (fr) 2011-08-26 2011-08-26 Plafond suspendu et procédé pour fournir un profilé pour un plafond suspendu

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EP (1) EP2562323B1 (fr)
DK (1) DK2562323T3 (fr)
EA (1) EA201490442A1 (fr)
PL (1) PL2562323T3 (fr)
WO (1) WO2013030091A1 (fr)
ZA (1) ZA201402146B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3839164A1 (fr) 2019-12-16 2021-06-23 Saint-Gobain Ecophon AB Système de plafond suspendu et procédé d'installation associé
EP3879044A1 (fr) 2020-03-13 2021-09-15 Saint-Gobain Ecophon AB Dalle de plafond et système de plafond suspendu comprenant une telle dalle de plafond

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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CN115288355A (zh) * 2022-07-29 2022-11-04 广东省建筑设计研究院有限公司 一种夏热冬暖地区枢纽机场航站楼综合采光结构
CN116065750B (zh) * 2023-03-06 2023-06-06 山西五建集团有限公司 钢结构多功能厅波浪形铝板吊顶及其模块化安装方法

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US5088261A (en) * 1990-12-20 1992-02-18 Usg Interiors, Inc. Curved grid tees for suspension ceilings
DE10214824A1 (de) * 2001-08-29 2003-06-12 Karl Gerhards Konstruktionen und Verfahren zur Erhöhung der Biegesteifigkeit und Tragfähigkeit von Biegeträgern
US20080155935A1 (en) * 2006-12-29 2008-07-03 Usg Interiors, Inc. Single strip single web grid tee
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EP3839164A1 (fr) 2019-12-16 2021-06-23 Saint-Gobain Ecophon AB Système de plafond suspendu et procédé d'installation associé
WO2021122125A1 (fr) 2019-12-16 2021-06-24 Saint-Gobain Ecophon Ab Système de plafond suspendu et son procédé d'installation
US11859383B2 (en) 2019-12-16 2024-01-02 Saint-Gobain Ecophon Ab Suspended ceiling system and method for installing thereof
EP3879044A1 (fr) 2020-03-13 2021-09-15 Saint-Gobain Ecophon AB Dalle de plafond et système de plafond suspendu comprenant une telle dalle de plafond
WO2021180644A1 (fr) 2020-03-13 2021-09-16 Saint-Gobain Ecophon Ab Carreau de plafond et système de plafond suspendu comprenant un tel carreau de plafond

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EP2562323B1 (fr) 2018-07-04
PL2562323T3 (pl) 2019-01-31
EA201490442A1 (ru) 2014-08-29
WO2013030091A1 (fr) 2013-03-07
DK2562323T3 (en) 2018-10-15
ZA201402146B (en) 2015-11-25

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