EP3976898B1 - Grid tee for suspended ceiling - Google Patents

Grid tee for suspended ceiling Download PDF

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Publication number
EP3976898B1
EP3976898B1 EP20730411.4A EP20730411A EP3976898B1 EP 3976898 B1 EP3976898 B1 EP 3976898B1 EP 20730411 A EP20730411 A EP 20730411A EP 3976898 B1 EP3976898 B1 EP 3976898B1
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EP
European Patent Office
Prior art keywords
main runner
central web
flanges
sheet material
thickness
Prior art date
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Active
Application number
EP20730411.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3976898A1 (en
Inventor
Scott G. Jankovec
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.)
Rockwool AS
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Rockwool AS
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Publication date
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Publication of EP3976898A1 publication Critical patent/EP3976898A1/en
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    • 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
    • E04B9/06—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
    • E04B9/10—Connections between parallel members of the supporting construction
    • 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
    • E04B9/12—Connections between non-parallel members of the supporting construction
    • E04B9/122—Connections between non-parallel members of the supporting construction one member passing through the other member, both members laying at least partly in the same plane
    • 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
    • E04B9/12—Connections between non-parallel members of the supporting construction
    • E04B9/122—Connections between non-parallel members of the supporting construction one member passing through the other member, both members laying at least partly in the same plane
    • E04B9/125—Connections between non-parallel members of the supporting construction one member passing through the other member, both members laying at least partly in the same plane both members being continuous members
    • 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
    • E04B9/12—Connections between non-parallel members of the supporting construction
    • E04B9/127—Connections between non-parallel members of the supporting construction one member being discontinuous and abutting against the other member

Definitions

  • the present invention relates to a beam or runner having a generally inverted T cross section that is used in a support grid for suspended ceilings.
  • Suspended ceilings typically require a support grid comprising a plurality of interconnected beams for supporting ceiling tiles or panels, light fixtures, air diffusers, etc.
  • the beams also referred to as runners or tees, have a generally inverted T-shape, with a reinforcing bulb at the top, a vertical web extending downwardly from the bulb, and opposed horizontal flanges at the bottom of the web for supporting drop-end ceiling panels.
  • the beams also typically include connectors on their ends to permit end-to end connection between adjacent beams.
  • the beams are typically made in a roll-forming operation in which a flat strip of sheet metal is sequentially deformed into a tee that is symmetrical in cross-section about its vertical axis, with the web having a double layer of sheet material and the opposed flanges each having a single layer of sheet material, as is well known in the art.
  • EP 1 703 034 A1 discloses a main runner according to the preamble of independent claim 1.
  • a main runner for a suspended ceiling grid system having a combination of features that permit a reduced thickness of the sheet material from which the main runner is formed, while maintaining the structural characteristics of the min runner. This results in a runner that is more economical to manufacture (because less material is required), is easier to handle, particularly in bulk or carton quantities (because each runner is lighter in weight), and is easier to cut.
  • a beam or grid tee has a cross-section generally in the form of an inverted T, with a central web of a double thickness of sheet metal, a pair of panel support flanges extending from one edge of the web, and a reinforcing bulb extending from the other edge of the web.
  • a main runner in a first aspect, includes integrally-formed first and second end connectors extending from the first and second ends of the central web, respectively, past the flanges.
  • the connectors facilitate end-to-end attachment of a first main runner to a second main runner.
  • the first end connector is displaced out of a plane defined by the central web in a first direction and the second end connector is displaced out of the plane defined by the central web in a second direction opposite to the first direction, with each of the first and second end connectors having a distal edge.
  • Each of the first and second end connectors further comprises a rectangularly-shaped embossment extending out of a first side of the end connector, the embossment being defined by a proximal edge, a distal edge, an upper edge and a lower edge.
  • First and second spaced-apart locking tabs each having a proximal tapered camming surface and distal locking surface, extend out of a second side of the end connector, the distal locking surface being substantially in alignment with the proximal edge of the embossment, such that the distal locking surface of the locking tabs engage the distal edge of the end connector of the second tee.
  • the two layers of forming the web of the beam are secured to each other by a first row of longitudinally spaced stitches at the upper end of the web adjacent the bulb and a second row of longitudinally spaced stitches at the lower end of the web adjacent the flanges, with the stitches in the first row being staggered relative to the stitches in the second row.
  • a lower cap is applied to the flanges so that the free edges of the flanges are bent back on themselves along with the edges of the cap to provide a hemmed flange.
  • the vertical dimension of the bulb is increased and the upper corners of the bulb are rounded.
  • a main runner or tee 10 for use in a suspended ceiling comprising a reinforcing bead or bulb 12, a central web 14, and a pair of opposed flanges 16 for supporting ceiling panels or tiles, all as is well known in the art.
  • the grid member includes integrally-formed first and second end connectors 18 extending from the first and second ends of the central web 14, respectively, past the flanges 16.
  • first and second end connectors 18 extending from the first and second ends of the central web 14, respectively, past the flanges 16.
  • Fig. 2 only a single end connector 18, extending from the left end of the main runner 10, is shown.
  • the first end connector 18 is displaced out of a plane defined by the central web 14 in a first direction "X"
  • the second end connector would be displaced out of the plane defined by the central web in a second direction opposite to the first direction "X”.
  • Each of the first and second end connectors have a distal edge 20.
  • a strap 22 adjacent each end of the central web 14 is deformed out of the plane of the central web in a direction "Y" opposite to the adjacent end connector, so that the strap 22 is configured to receive an end portion 24 of an end connector of a second tee.
  • Each of the first and second end connectors 18 further comprises a rectangularly-shaped embossment 26 extending out of a first side of the end connector, the embossment being defined by a proximal edge, a distal edge, an upper edge and a lower edge.
  • the two layers of the web 14 are preferably secured to each other by means of locking stitches or lances 34 that mechanically join together the two layers of the web 14, thus providing the main runner 10 with added resistance to torque.
  • the stitches 34 may be of any configuration known in the art. In one embodiment, the stitches have a configuration such as that shown in U.S. Patent No. 5,979055 .
  • Placing each row of stitches 34 as close to the adjacent bulb12/flanges 16 is desired so as to maximize the spacing "D" between the two rows of stitches.
  • the spacing between the two rows 36, 38, together with the stitches 34 in one row being staggered relative to the stitches 34 in the other row, provide greater rigidity and also avoids stitches in the area of the slots 40 that receive the connectors for cross tees associated with the main runner in the assembled suspension grid, thus avoiding potential interference between the stitches 34 and the connectors of the cross tees.
  • a lower cap 42 is applied to the flanges so that the free edges 16a of the flanges 16 are bent back on themselves along with the edges 42a of the cap 42 to provide a hemmed flange.
  • the cap 42 also provides for increased section properties for the main runner 10 due to the additional mass provided by the cap 42.
  • the bulb 12 of the runner 10 is modified to provide for a greater beam height than a standard runner configuration. More specifically, the vertical dimension of the bulb 12 is increased and the upper corners 44 of the bulb 12 are rounded. The rounded corners 44 help to avoid interference between the bulb 12 and light fixture housings that are supported in the assembled grid system.
  • the bulb 12 has a height of 1.308 cm (0.515") and a width of 0.635 cm (0.250"), with the corners of the bulb having a radius of 0.236 cm (0.093"), while the runner has an overall height of 4.166 cm (1.640").
  • the enhanced strength provided to a main runner having the combination of features described above permit the runner to be formed of thinner material than the prior art runner without compromising the beam strength of the runner.
  • the thickness of the sheet material from which the main runner is roll formed may be reduced on the order of 20% (e.g., from 0.038 cm to 0.030 cm (0.015" to 0.012")).

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Residential Or Office Buildings (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP20730411.4A 2019-06-03 2020-05-31 Grid tee for suspended ceiling Active EP3976898B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201962856217P 2019-06-03 2019-06-03
US16/854,184 US20200378116A1 (en) 2019-06-03 2020-04-21 Grid tee for suspended ceiling
PCT/EP2020/065104 WO2020245067A1 (en) 2019-06-03 2020-05-31 Grid tee for suspended ceiling

Publications (2)

Publication Number Publication Date
EP3976898A1 EP3976898A1 (en) 2022-04-06
EP3976898B1 true EP3976898B1 (en) 2023-05-31

Family

ID=73551183

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20730411.4A Active EP3976898B1 (en) 2019-06-03 2020-05-31 Grid tee for suspended ceiling

Country Status (6)

Country Link
US (1) US20200378116A1 (pl)
EP (1) EP3976898B1 (pl)
DK (1) DK3976898T3 (pl)
ES (1) ES2950840T3 (pl)
PL (1) PL3976898T3 (pl)
WO (1) WO2020245067A1 (pl)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD1009309S1 (en) * 2020-04-21 2023-12-26 Rockwool A/S Grid tee for suspended ceiling
CN112854584B (zh) * 2021-01-11 2022-05-17 广东新艺达国际装配式建筑装饰工程有限公司 一种墙体龙骨钢结构连接结构
USD1047225S1 (en) 2021-11-23 2024-10-15 Rockwool A/S Support member for a suspended ceiling
US11802407B2 (en) 2021-11-23 2023-10-31 Rockwool A/S Suspended drywall ceiling grid system support members
US12060708B2 (en) 2022-08-01 2024-08-13 Usg Interiors, Llc Light gauge main tee splice

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1424800A (en) * 1972-06-26 1976-02-11 Electronic Components Ltd Structural members and supportin frameworks
GB2274080B (en) 1993-01-08 1995-09-06 Armstrong World Ind Inc Ceiling runners and process for producing same
US5421132A (en) * 1994-03-24 1995-06-06 Armstrong World Industries, Inc. Decorative elements for subceilings
ATE472642T1 (de) * 2005-03-18 2010-07-15 Chicago Metallic Continental Abgehängtes deckensystem
ITVE20120032A1 (it) * 2012-09-11 2014-03-12 Dallan Spa Profilato a t rovescia per realizzare strutture di sostegno di controsoffittature
AU2018276075B2 (en) * 2017-06-02 2023-07-13 Locking Key Pty Ltd A suspended ceiling hanger clip

Also Published As

Publication number Publication date
WO2020245067A1 (en) 2020-12-10
DK3976898T3 (da) 2023-08-14
US20200378116A1 (en) 2020-12-03
ES2950840T3 (es) 2023-10-13
EP3976898A1 (en) 2022-04-06
PL3976898T3 (pl) 2023-07-31

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