ZA200804293B - Grid tee for suspension ceiling - Google Patents

Grid tee for suspension ceiling

Info

Publication number
ZA200804293B
ZA200804293B ZA200804293A ZA200804293A ZA200804293B ZA 200804293 B ZA200804293 B ZA 200804293B ZA 200804293 A ZA200804293 A ZA 200804293A ZA 200804293 A ZA200804293 A ZA 200804293A ZA 200804293 B ZA200804293 B ZA 200804293B
Authority
ZA
South Africa
Prior art keywords
grid tee
suspension ceiling
ceiling
suspension
tee
Prior art date
Application number
ZA200804293A
Other languages
English (en)
Inventor
James J Lehane Jr
Peder J Gulbrandsen
Martin E Likozar
Original Assignee
Usg Interiors Inc
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 Usg Interiors Inc filed Critical Usg Interiors Inc
Publication of ZA200804293B publication Critical patent/ZA200804293B/xx

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/06Ceilings; 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
    • E04B9/065Ceilings; 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
    • E04B9/067Ceilings; 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
    • E04B9/068Ceilings; 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
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0413Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0439Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the cross-section comprising open parts and hollow parts
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/046L- or T-shaped
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49616Structural member making
    • Y10T29/49623Static structure, e.g., a building component
    • Y10T29/49625Openwork, e.g., a truss, joist, frame, lattice-type or box beam
    • Y10T29/49627Frame component

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Panels For Use In Building Construction (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Finishing Walls (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Road Signs Or Road Markings (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
ZA200804293A 2005-11-21 2006-10-10 Grid tee for suspension ceiling ZA200804293B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/283,619 US7516585B2 (en) 2005-11-21 2005-11-21 Grid tee for suspension ceiling

Publications (1)

Publication Number Publication Date
ZA200804293B true ZA200804293B (en) 2009-09-30

Family

ID=38067693

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA200804293A ZA200804293B (en) 2005-11-21 2006-10-10 Grid tee for suspension ceiling

Country Status (10)

Country Link
US (3) US7516585B2 (xx)
EP (1) EP1951966B1 (xx)
JP (1) JP2009516791A (xx)
CN (1) CN101351602B (xx)
AU (1) AU2006317658A1 (xx)
BR (1) BRPI0618774A2 (xx)
CA (1) CA2630383C (xx)
RU (1) RU2008125127A (xx)
WO (1) WO2007061524A2 (xx)
ZA (1) ZA200804293B (xx)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070175152A1 (en) * 2005-12-20 2007-08-02 Kupec Thoms F Single strip - double web ceiling grid member
US7797903B2 (en) * 2005-11-21 2010-09-21 Usg Interiors, Inc. Compressed dovetail lance
US7516585B2 (en) * 2005-11-21 2009-04-14 Usg Interiors, Inc. Grid tee for suspension ceiling
US20080120941A1 (en) * 2006-09-27 2008-05-29 Usg Interiors, Inc. Single web grid with reinforced bulb
JP4859802B2 (ja) * 2007-09-28 2012-01-25 株式会社内田洋行 吊装置
GB2456328A (en) * 2008-01-11 2009-07-15 Usg Interiors Inc Grid members for a suspended ceiling and methods of making same
USD668352S1 (en) 2008-01-11 2012-10-02 Usg Interiors, Llc Suspended ceiling wall angle
US8215075B2 (en) * 2008-03-18 2012-07-10 Awi Licensing Company Up-tight surface covering and attachment system
US7762034B2 (en) 2008-09-26 2010-07-27 Chicago Metallic Corporation Rotary stitch for joining sheet metal stock
US20100257807A1 (en) * 2009-04-09 2010-10-14 Usg Interiors, Inc. Extended short span tee for drywall ceiling
US8359801B2 (en) 2010-08-02 2013-01-29 Usg Interiors, Llc Grid runner
US8316600B2 (en) * 2010-12-06 2012-11-27 Usg Interiors, Llc Wall conforming suspended ceiling molding
CN102220795A (zh) * 2011-04-14 2011-10-19 广东省建筑装饰工程有限公司 一种适用于大跨空间钢结构的吊顶系统及施工方法
US8359803B2 (en) 2011-05-17 2013-01-29 Usg Interiors, Llc Grid runner cap anchoring lance
US8397462B2 (en) * 2011-06-03 2013-03-19 Usg Interiors, Llc Open web grid runner
US20130042560A1 (en) * 2011-08-16 2013-02-21 Worthington Armstrong Venture Noise damper
US8381486B1 (en) * 2011-12-29 2013-02-26 Usg Interiors, Llc Unique profile ceiling grid
US9021759B2 (en) 2012-06-13 2015-05-05 Usg Interiors, Llc Serpentine insert for open web grid
US9290293B2 (en) 2013-01-03 2016-03-22 Samuel A. Tilton Storage systems and related methods
DE102014002666A1 (de) * 2013-03-26 2014-10-02 Rainhard Nordbrock Traverse und Verfahren zum Montieren
NL2011556C2 (nl) * 2013-10-04 2015-04-09 Saint Gobain Acoustical Products Internat B V Plafondophangsysteem, profiel en werkwijze.
US9416536B1 (en) * 2015-07-16 2016-08-16 Usg Interiors, Llc Indexed support bar
CN105133732A (zh) * 2015-07-24 2015-12-09 哈尔滨工业大学空间钢结构幕墙有限公司 一种用于大跨度格构式网格结构的组装杆件单元
USD829345S1 (en) * 2016-11-14 2018-09-25 Certainteed Ceilings Corporation Support member for ceiling system
WO2018089903A1 (en) 2016-11-14 2018-05-17 Certainteed Ceilings Corporation Support member for ceiling system
USD828581S1 (en) * 2017-01-05 2018-09-11 Tate Access Floors Leasing, Inc. Ceiling grid T-bar structural member
EP3466601A1 (en) * 2017-10-04 2019-04-10 Saint-Gobain Ecophon AB Profile member and method for manufacturing thereof
AT521757B1 (de) * 2018-09-28 2021-05-15 Slavonia Baubedarf Gmbh Tragprofil für eine Fassadenkonstruktion
US10612236B1 (en) * 2018-11-29 2020-04-07 AES Clean Technology, Inc. Non-walkable clean room ceiling, mounting system, and method
EP3839164A1 (en) * 2019-12-16 2021-06-23 Saint-Gobain Ecophon AB Suspended ceiling system and method for installing thereof
USD999406S1 (en) * 2020-10-16 2023-09-19 Sasan Saidian Ceiling rail connector
US11384536B1 (en) * 2021-04-12 2022-07-12 Usg Interiors, Llc Ceiling grid hanger holes
USD1029297S1 (en) * 2022-01-06 2024-05-28 Polargy Llc Ceiling grid structural member

Family Cites Families (85)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US582428A (en) * 1897-05-11 leonard
US991603A (en) * 1910-09-22 1911-05-09 George William Brooks Fireproof beam.
US1833174A (en) * 1927-08-11 1931-11-24 Burgess Lab Inc C F Furring strip
US1707198A (en) * 1928-08-02 1929-03-26 Standard Rice Company Inc Polishing machine
US2059483A (en) * 1931-12-24 1936-11-03 Johns Manville Replaceable unit ceiling construction
US2066205A (en) * 1935-09-11 1936-12-29 Paul J Keating Wallboard securing means
US2254558A (en) * 1938-10-10 1941-09-02 Ivan A Williams Fastening element and method of making same
US2307653A (en) * 1939-05-10 1943-01-05 Gyproc Products Ltd Wall and ceiling construction
US2403580A (en) * 1943-06-24 1946-07-09 Cartwright Harold Norman Walls and ceilings of buildings
US2457148A (en) * 1943-08-02 1948-12-28 Great Lakes Steel Corp Structural beam
US2447694A (en) * 1944-07-06 1948-08-24 Harold L Finch Ceiling and wall construction
US2700172A (en) * 1952-01-28 1955-01-25 Frederick W Rohe Sectional grommet for reinforcing openings in panels and sheets
US2920357A (en) * 1956-04-26 1960-01-12 Walter M Ericson Ceiling with controlled ventilation
US3059735A (en) * 1959-01-14 1962-10-23 Nat Gypsum Co Ceiling grid runner connection means
US3256670A (en) 1962-07-23 1966-06-21 Tersigni Ennio Prefabricated steel joist adapted for the reinforcement of floors
US3202077A (en) * 1963-04-17 1965-08-24 Owens Corning Fiberglass Corp Expansion channel
US3325954A (en) * 1964-01-13 1967-06-20 Wood Conversion Co Ventilating ceiling and resilient foam sealing means therefor
US3342007A (en) * 1964-08-03 1967-09-19 Anthes Imp Ltd Structural member
US3284977A (en) * 1965-04-08 1966-11-15 Lickliter Expansion splice
US3354598A (en) * 1965-07-30 1967-11-28 Wood Conversion Co Ventilating ceiling and suspension grid therefor
US3355206A (en) * 1966-02-02 1967-11-28 Wood Conversion Co Suspension grid for ceilings
US3370301A (en) * 1966-04-14 1968-02-20 Walter Jim Corp Ceiling suspension member and system
US3369332A (en) * 1966-04-14 1968-02-20 Walter Jim Corp Ceiling suspension system
US3511012A (en) * 1968-03-22 1970-05-12 Acoustical Ceiling Accessories Structural units for forming grids for suspended tile ceilings
US3609933A (en) * 1968-11-22 1971-10-05 Chicago Metallic Corp Spaced panel wall construction
US3586282A (en) * 1969-03-27 1971-06-22 Armstrong Cork Co Lighting fixture mounting bracket
US3599921A (en) * 1970-01-14 1971-08-17 Erico Prod Inc Independent support clips
US3612461A (en) * 1970-04-20 1971-10-12 Minerallac Electric Co Light fixture supporting clip
US3848385A (en) * 1970-06-12 1974-11-19 Nat Ceiling Corp Modular ceiling construction
US3671061A (en) * 1970-07-02 1972-06-20 Nat Gypsum Co Gypsum board fastener
US3698224A (en) 1970-11-16 1972-10-17 Siderurgica Occidental C A Process for the production of steel structural shapes
US3832816A (en) * 1972-06-05 1974-09-03 Chicago Metallic Corp Concealed grid suspended ceiling structure with simplified installation
CH565911A5 (xx) 1972-12-14 1975-08-29 Armstrong Cork Co
US3881286A (en) * 1973-07-23 1975-05-06 Edward A Smith Preformed floor and roof structure
US4144691A (en) * 1976-07-02 1979-03-20 Hindman Milo F Patio roof
US3996716A (en) * 1976-09-15 1976-12-14 Johns-Manville Corporation Ceiling grid arrangement and connector used therewith
US4206578A (en) * 1978-07-31 1980-06-10 Donn Incorporated Grid tee for suspension ceilings or the like
USRE31528E (en) * 1978-07-31 1984-03-06 Donn Incorporated Grid tee for suspension ceilings or the like
SE424223B (sv) * 1979-05-22 1982-07-05 Bohlin Jan Olof Anordning for att etablera en flodesforbindelse med en rorledning
US4334703A (en) * 1979-08-09 1982-06-15 Arvin Industries, Inc. Tube-to-plate connection
DE8008759U1 (de) * 1980-03-29 1980-09-18 Richter, Reinhold, Dipl.-Ing., 6100 Darmstadt Haenger fuer eine tragschiene einer unterdecke
DE3012261C2 (de) 1980-03-29 1983-08-04 Richter-System GmbH & Co KG, 6103 Griesheim Aufhängevorrichtung für eine Tragschiene einer Unterdecke
US4542615A (en) * 1982-03-30 1985-09-24 Specified Ceiling Systems Drop ceiling framework
US4520609A (en) * 1982-09-27 1985-06-04 Donn Incorporated Grid tee for suspension ceilings or the like
DE3235957A1 (de) * 1982-09-29 1984-03-29 Gebr. Knauf Westdeutsche Gipswerke, 8715 Iphofen Kreuzverbinder fuer tragschienen einer unterdecke
US4489529A (en) * 1983-01-17 1984-12-25 Armstrong World Industries, Inc. Reinforced ceiling runner
US4549383A (en) * 1983-09-08 1985-10-29 Chicago Metallic Corporation Suspended ceiling grid system
US4525973A (en) * 1984-01-09 1985-07-02 Chicago Metallic Corporation Suspended ceiling system
US4601153A (en) * 1985-06-14 1986-07-22 Chicago Metallic Corporation Suspended ceiling system
DE3525139A1 (de) 1985-07-13 1987-01-15 Richter System Gmbh & Co Kg Tragschiene fuer unterdecken
DE3606112C2 (de) * 1986-02-26 1995-06-29 Boegle Kg Wilhelm Tragschiene für Unterdecken
US4677802A (en) * 1986-03-07 1987-07-07 Chicago Metallic Corporation Suspended ceiling system and runner
US4850172A (en) * 1986-04-25 1989-07-25 Alcan Aluminum Corporation Ceiling or like structural system and splice member therefor
US4794745A (en) * 1986-12-15 1989-01-03 National Rolling Mills Inc. Tier drop grid system
US4852325A (en) * 1987-10-26 1989-08-01 Chicago Metallic Corporation Reinforced bead
US4817357A (en) * 1987-12-21 1989-04-04 Donn Incorporated Suspension ceiling grid tee
US4785595A (en) * 1988-01-29 1988-11-22 Chicago Metallic Corporation Fire-rated main runner
US4932186A (en) * 1989-04-06 1990-06-12 Chicago Metallic Corporation Reinforced bead
US4989387A (en) * 1989-08-24 1991-02-05 Chicago Metallic Corporation Ceiling system with staked on connectors
US5044138A (en) * 1989-10-13 1991-09-03 Usg Interiors, Inc. Ceiling suspension structure adapted for unopposed intersections
DE9013073U1 (xx) * 1990-09-14 1990-11-15 Nadel- Und Drahtwarenfabrik Ernst Bierbach Gmbh & Co Kg, 4750 Unna, De
GB2274080B (en) * 1993-01-08 1995-09-06 Armstrong World Ind Inc Ceiling runners and process for producing same
US5577313A (en) * 1995-01-17 1996-11-26 Guido; Anthony Method and apparatus for joining deformable sheet stock
DE19510741A1 (de) * 1995-03-24 1996-09-26 Wilhelmi Werke Gmbh & Co Kg Längs- oder Querträger für eine Deckenverkleidung
SE504079C2 (sv) * 1995-05-03 1996-11-04 Ecophon Ab Anordning för hopkoppling av profiler
US5720144A (en) * 1996-03-07 1998-02-24 Knudson; Gary A. Metal beams with thermal break and methods
AU717886B2 (en) * 1996-10-31 2000-04-06 Kalford Pty Ltd A reinforcing strut
US6050534A (en) * 1998-01-16 2000-04-18 Andrews; Carl E. Cubicle curtain and IV track support and mounting clip
US6047511A (en) * 1998-03-04 2000-04-11 Usg Interiors, Inc. Grid tee with integrally stitched web
US6041564A (en) * 1998-03-06 2000-03-28 Usg Interiors, Inc. Clinched double web grid tee
US6029413A (en) * 1998-10-14 2000-02-29 Compas, Jr.; Albert W. Dropped ceiling support frame
US6138416A (en) * 1998-11-12 2000-10-31 Worthington Armstrong Venture Beam
US6205733B1 (en) * 1999-07-27 2001-03-27 Usg Interiors, Inc. Direct mount ceiling panel grid system
US6523313B2 (en) * 2001-03-06 2003-02-25 Worthington Armstrong Venture Main beam connection
US6722098B2 (en) * 2002-02-21 2004-04-20 Worthington Armstrong Venture Beam for drywall ceiling
GB2387609B (en) 2002-04-17 2005-09-28 Hadley Ind Plc Security fencing
US6701686B1 (en) * 2003-01-16 2004-03-09 Worthington Armstrong Venture Ceiling grid with seal
US20070175152A1 (en) * 2005-12-20 2007-08-02 Kupec Thoms F Single strip - double web ceiling grid member
US20070028554A1 (en) * 2005-08-05 2007-02-08 James Ferrell High strength runner
US20080148668A1 (en) * 2005-08-05 2008-06-26 Jahn Peter G Grid tee for suspended ceiling
US7516585B2 (en) 2005-11-21 2009-04-14 Usg Interiors, Inc. Grid tee for suspension ceiling
US7797903B2 (en) * 2005-11-21 2010-09-21 Usg Interiors, Inc. Compressed dovetail lance
US8590274B2 (en) * 2006-06-05 2013-11-26 Worthington Armstrong Venture Single-layered web beam for a suspended ceiling
US8590275B2 (en) * 2006-06-05 2013-11-26 Worthington Armstrong Venture Single-layered web beam for a panel suspended ceiling
US8572930B2 (en) * 2006-06-05 2013-11-05 Worthington Armstrong Venture Single layered web beam for a drywall suspended ceiling

Also Published As

Publication number Publication date
US7516585B2 (en) 2009-04-14
CN101351602B (zh) 2011-11-30
AU2006317658A1 (en) 2007-05-31
RU2008125127A (ru) 2009-12-27
EP1951966A2 (en) 2008-08-06
WO2007061524A2 (en) 2007-05-31
CN101351602A (zh) 2009-01-21
JP2009516791A (ja) 2009-04-23
WO2007061524A3 (en) 2007-11-22
US7832168B2 (en) 2010-11-16
US8266860B2 (en) 2012-09-18
BRPI0618774A2 (pt) 2011-09-13
CA2630383C (en) 2015-06-30
US20070125038A1 (en) 2007-06-07
EP1951966A4 (en) 2012-10-10
US20090158684A1 (en) 2009-06-25
US20080134611A1 (en) 2008-06-12
CA2630383A1 (en) 2007-05-31
EP1951966B1 (en) 2015-01-21

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