US3846031A - Ceiling grid system expansion joint - Google Patents

Ceiling grid system expansion joint Download PDF

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Publication number
US3846031A
US3846031A US00240921A US24092172A US3846031A US 3846031 A US3846031 A US 3846031A US 00240921 A US00240921 A US 00240921A US 24092172 A US24092172 A US 24092172A US 3846031 A US3846031 A US 3846031A
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United States
Prior art keywords
beams
web
bulb
recited
apertures
Prior art date
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Expired - Lifetime
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US00240921A
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English (en)
Inventor
G Adams
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Rollform Inc
Original Assignee
Rollform Inc
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Filing date
Publication date
Application filed by Rollform Inc filed Critical Rollform Inc
Priority to US00240921A priority Critical patent/US3846031A/en
Priority to CA165,567A priority patent/CA966269A/en
Priority to DE2316927A priority patent/DE2316927A1/de
Priority to FR7312173A priority patent/FR2179123A1/fr
Application granted granted Critical
Publication of US3846031A publication Critical patent/US3846031A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E04B9/08—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members having the capability of expansion, e.g. in case of fire
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B9/00—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation
    • E04B9/06—Ceilings; Construction of ceilings, e.g. false ceilings; Ceiling construction with regard to insulation characterised by constructional features of the supporting construction, e.g. cross section or material of framework members
    • E04B9/12—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
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S52/00—Static structures, e.g. buildings
    • Y10S52/05—Designed for thermal distortion
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/21—Utilizing thermal characteristic, e.g., expansion or contraction, etc.
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ
    • Y10T403/4991—Both members deformed

Definitions

  • This invention relates generally to fire rated ceilings, and more particularly to an improved structural main beam for use in the associated supporting lattice or grid structure therefore.
  • the subject invention is addressed to a main structural beam for use in a fire rated suspended ceiling assembly which is adapted to functionally retain the integrity of such a ceiling. It is therefore the primary object of the subject invention to provide an improved structural main beam for a suspended ceiling assembly which is adapted to localize and control thermal expansion and thereby substantially maintain the integrity of the suspended ceiling during exposure to a fire.
  • the thermally responsive structural beam includes a web portion having a continuous flange on one spaced marginal edge and a bulb or rolled over portion along an opposite marginal edge.
  • a pair of vertically spaced rectangular apertures or cut outs are located adjacent the bulb and flange portions, respectively, and are adapted to provide localized deformation of the flange and bulb portion in response to longitudinal expansion of the beam.
  • the deformable section be devised in such a manner as to obviate the need for additional bracing or reinforcing members for supporting the ceiling load.
  • the design of the beam itself becomes more complex and correspondingly more costly to produce. It is therefore a general object of the subject invention to provide a beam having a localized deformable section not requiring additional reinforcement to support normal ceiling loads thereby simplifying the design and fabrication thereof.
  • the main structural beams are adapted to be connected in end to end relationship by means of an expandible interlocking coupling arrangement devised to provide expansion relief in response to exposure of induced stresses. It is therefore another object of the subject invention to provide an expandible interlocking coupling arrangement for longitudinally joining a pair of main beams in end to end relationship.
  • FIG. 1 is an enlarged fragmentary prospective view of a pair of main structural beams in accordance with the subject invention adapted for forming a part of a supporting lattice of a suspended ceiling and illustrated with a pair of fragmentary cross beams before assembly thereof;
  • FIG. 2 is an enlarged fragmentary prospective view of the end portions of the pair of main structural beams illustrated in FIG. 1 illustrating the pair of beams interlockingly connected;
  • FIG. .3 is an enlarged fragmentary prospective view of the structure illustrated in FIG. 1 with the cross beams assembled thereto and after the assembly has been exposed to a substantial thermal load;
  • FIG. 4 is an enlarged, fragmentary plan view looking in the direction of the arrows 4-4 in FIG. 1.
  • a plurality of main structural beams are generally located in spaced parallel relationship, with the spacing generally corresponding to an edge dimension of a ceiling panel such as an acoustic tile, a gypsum board, or the like and adapted to be supported by laterally extending flanges located on the lower end of each of the beam members forming the lattice.
  • the space between adjacent main structural beams is likewise subdivided by means of suitable cross beams appropriately located on centers which accommodate the adjacent edge dimensions of the ceiling panels to be suspended.
  • the cross beams are adapted to be supported at their extremities by the main beams and are usually located in perpendicular relationship thereto. As shall hereinafter be described, and in accordance with the subject invention, the cross beams are flexibly interlocked. in suitable slots located in the web of the main beams and adapted for maintaining the integrity of the system during a fire.
  • a structural main beam is indicated generally at 10, the beam l0'being adapted for use in forming a supporting lattice for a fire rated suspended ceiling.
  • the beam 10 is commonly referred to in the trade as a T-member because of its generally inverted T-shaped vertical cross crosssection and, as shown, the beam or T member is comprised of a vertically extending web 12, a ceiling panel supporting flange 16 which extends laterally from opposite sides of the web 12 and an enlarged bulb 14 of generally rectangular shaped cross-section.
  • the member 10 is shown in abutting end to end relationship with an identical structural beam 10', the beam 10' having a web 12', a bulb 14' and a laterally extending flange 16'.
  • the beam 10' is designated by like numerals used to designate the beam 10 but with the addition of a prime suffix.
  • the structural beams 10 and 10' are slidably held together and guided by an interlocking arrangement which permits the use of standard length beam members, e.g., 12 feet, in various multiples or parts thereof to accommodate different spans.
  • the structural beam members 10 and 10' are installed in parallel rows spaced apart a distance substantially equal to or slightly greater than an edge dimension of a ceiling tile (not shown) to be used whereby parallel edges of the panels are supported in flanges, such as the flanges l6 and 16', respectively.
  • the beams 10 and 10' include a plurality of spaced apertures 18 adapted to receive suitable hangers (not shown) for supporting the grid system from the superstructure, and spaced sets of vertically oriented slots 20, the latter being used for receiving tabs 22, for interconnecting suitable cross beams 24 and 24, respectively to the member 10.
  • the cross beams 24 and 24' also are generally inverted T- shaped in cross-section and each include web, bulb, and flange portions substantially identical to the web 12, bulb l4, and lateral flange 16 of the beam 10. Additional sets of apertures are longitudinally spaced in the web 12 of the beam 10 and are adapted to receive projecting tabs of other cross beams (not shown). The sets of apertures are preferably longitudinally spaced I flanges of the cross beams so that the grids system formed by the main structural beams and the cross beams define a substantially rectangular lattice.
  • the coupling means for interlocking the main structural beams 10 and 10' in end to end relationship are adapted to provide expansion relief.
  • the end of the beam 10 includes a projecting web portion 28 spaced slightly outward from the plane of the web 12 and defining a vertical shoulder 27 therewith, and a generally rectan-' gularly shaped tab 30 which deflects slightly inward relative to the web 12' of the beam 10'.
  • a tab engaging aperture 34 is suitably located to the left of the end portion 28 and adapted for receiving a tab 30' as defined in the abutting end of the beam 10'.
  • the tab 30 is convergentially tapered outwardly, the inner vertical dimension being substantially equal to the vertical dimension of the aperture 34.
  • the inner portion of the tab provides a retainer slide or guide for the beam assembly when engaged in the tab engaging aperture.
  • the bulb sections, however, 14 and 14' of each of the beams 10 and 10', respectively, is suitably undercut and defines vertically extending shoulder portions 32 and 32', respectively, which normally provides a longitudinally extending void in the bulb portions when the beams are interconnected in end to end relationship.
  • the beams 10 and 10' are interconnected by locating the tabs 30 and 30 in the tab receiving apertures 34 and 34', respectively, and then suitably reversely folding over the tabs therethrough.
  • the longitudinal distance between the shoulders 32 and 32' re spectively define the limits of a slidable expansion relief point, the operation of which will be hereinafter described in conjunction with the operation of the beam 10 when subjected to a fire.
  • the main structural beams 10 and 10 include, at least, one localized expansion joint whereby thermal expansion can be localized to a selective area or zone of the beam, and the integrity of the system can be maintained.
  • the web 12 of the beam 10 is seen to include a generally rectangular shaped cutout area or slot 36 which defines a continuous marginal strip 46 of substantially uniform width between the lower edge of the aperture and the flange 16.
  • a V-shaped notch 38 formed in the strip substantially at the substantial at the midpoint of the lower edge of the aperture 36 extends downwardly toward the flange 16.
  • a second elongated rectangular slot or cut out 40 of slightly longer longitudinal dimension and centrally disposed and spaced above the cut out 36 defines a continuous marginal strip 48 also preferably of substantially uniform width adjacent to the bulb 14.
  • the bulb 14 includes suitable vertical suppression points or creases 44 oriented in accordance with the midpoint and end edges of the slot 40 to provide stress concentration points in the bulb 14 as shown generally in FIGS. 1 and 3 and in greatly exaggerated form in FIG. 4.
  • the rectangular cut outs 36 and 40 are adapted to permit lateral bending of the bulb 14 and of a section 42 of the web 12 disposed between the slots 36 and 40 and downward bending of the flange 16 in response to thermal expansion of the beam 10.
  • the flange 16 In operation, when the beam is exposed to a fire, the flange 16 is subjected to the highest thermal loading due to its location in direct confrontation therewith.
  • the bulb portion 14 located on the opposite vertical end of the beam however is exposed to a substantially less thermal loading due to its vertical position above the flange and generally speaking is only indirectly subjected to the high temperature source.
  • FIG. 3 the beam 10 is illustrated in its expansion relief state. More particularly it will be seen that the flange l6 buckles downwardly due to the eminence of the V-notch 38 disposed midway in the slot 36 providing stress concentration in the web 12 and more particularly described in the patent to Adams, US. Pat. No. 3,350,125, the patent also being incorporated herein by reference.
  • the flange l6 deflects upwardly in response to thermal expansion of the web 12 of the beam 10 to drive the shoulders 32 and 32' into abutting confrontation.
  • the folded over tabs and 30 longitudinally and guidably slide along the outer surfaces of web 12 and 12' and provide a slip joint therebetween.
  • two expansion relief cut outs each comprised of the slots 36 and 40 are located inwardly a selective distance from each opposite longitudinal end of the beam 10.
  • a controlled expansion beam for use in a ceiling grid system comprising:
  • said means including upper and lower longitudinally elongated apertures formed solely in said web one above the other and disposed in spaced relationship between said flange and said bulb portion, said apertures defining longitudinally extending upper and lower continuous marginal strips in the web along and adja- 5 cent to said bulb portion and said flange, said marginal strip located adjacent to said flange being of substantially uniform width and provided intermediate the ends thereof with only a single maximnly disposed notch means which extends downwardly from said lower aperture and terminates short of said flange for controlled downward buckling of said flange in response to longitudinal compressive forces applied to said beam.
  • the beam as recited in claim 1 including means located proximate, at least, one end of said beam for interlockingly connecting said beam in end to end relationship with a beam of similar configuration.
  • said means includes a tabprojecting outwardly from said web, and an aperture located inwardly in said web relative to said tab.
  • said bulb portion is cut back at an end of said beam and including means at said end of said beam for connecting the lat- 40 ter in endwise butting relation to another similar beam, said means adapted to permit the interconnected ends of said beams to slide toward each other within limits defined at least in part by the cut-back of said bulb portion.
  • said means comprises a generally rectangular aperture adjacent to the mentioned end of said beam, and a longitudinal tongue on said end laterally offset from the plane of the web of said beam, said tongue adapted to extend alongside the web of said other similar beam and to be folded back through a similar aperture in said other beam, said tongue adapted further to slide longitudinally in said aperture and fitting snugly between the upper and lower edges thereof normally and during sliding movement thereof to hold said beam and said other beam substantially in alignment with each other.
  • a controlled expansion beam as recited in claim 1 further including a second beam substantially similar to the first recited beam and disposed in endwise butting relation with said first recited beam; and means providing a sliding interlocking connection between said beams, said means holding the butted ends of said beams rigidly together and in alignment with each other while permitting said ends to 7 8 crush together when said beams are compressed ening the beams so that they are likely to be damlongitudinally as under thermal expansion, the bulb aged by normal handling. portions of both beams being cut back and spaced 12.
  • each of said beams is provided adsaid tongues being longitudinally slidable in said apjacent each end thereof with an expansion relief section ertures when the butted ends of said beams crush of the type specified in claim 1, together and snugly fitting between the upper and said expansion relief sections and the cut-backs in the lower edges of said apertures to hold said ends in bulb portions of said beams being mutually collecalignment with each other normally and at least tively operable to absorb and relieve forces of longenerally while said beams are crushing together.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
US00240921A 1972-04-04 1972-04-04 Ceiling grid system expansion joint Expired - Lifetime US3846031A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US00240921A US3846031A (en) 1972-04-04 1972-04-04 Ceiling grid system expansion joint
CA165,567A CA966269A (en) 1972-04-04 1973-03-08 Ceiling grid system expansion joint
DE2316927A DE2316927A1 (de) 1972-04-04 1973-04-04 Traggitterwerk fuer eine haengedecke
FR7312173A FR2179123A1 (en:Method) 1972-04-04 1973-04-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00240921A US3846031A (en) 1972-04-04 1972-04-04 Ceiling grid system expansion joint

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US3846031A true US3846031A (en) 1974-11-05

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US00240921A Expired - Lifetime US3846031A (en) 1972-04-04 1972-04-04 Ceiling grid system expansion joint

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US (1) US3846031A (en:Method)
CA (1) CA966269A (en:Method)
DE (1) DE2316927A1 (en:Method)
FR (1) FR2179123A1 (en:Method)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965632A (en) * 1974-07-19 1976-06-29 Questor Corporation Fire rated grid
US4016701A (en) * 1975-11-18 1977-04-12 Ceiling And Drywall Products Limited Controlled expansion suspended ceiling grid member
US4021986A (en) * 1975-04-18 1977-05-10 Specified Ceiling Systems Modular ceiling framework
US4208851A (en) * 1977-02-25 1980-06-24 Roblin Industries, Inc. Suspended ceiling system
US4442641A (en) * 1979-10-28 1984-04-17 Marley Tile A.G. Verge member for a pitched roof and roofing system incorporating the same
US4462198A (en) * 1981-04-03 1984-07-31 Ceiling Dynamics, Inc. Suspended ceiling system
US4549383A (en) * 1983-09-08 1985-10-29 Chicago Metallic Corporation Suspended ceiling grid system
US4586841A (en) * 1984-06-01 1986-05-06 Hunter Richard P Suspended ceiling
US4606166A (en) * 1985-05-13 1986-08-19 National Rolling Mills Inc. Fire-rated beam with expansion relief section
US4785595A (en) * 1988-01-29 1988-11-22 Chicago Metallic Corporation Fire-rated main runner
US4785603A (en) * 1986-11-28 1988-11-22 National Rolling Mills Inc. Interlocking cross tee
US4794745A (en) * 1986-12-15 1989-01-03 National Rolling Mills Inc. Tier drop grid system
US4827681A (en) * 1986-11-28 1989-05-09 National Rolling Mills, Inc. Interlocking cross tee
US4866900A (en) * 1987-11-23 1989-09-19 Chicago Metallic Corporation Drywall furring system
US4866898A (en) * 1988-06-20 1989-09-19 Manville Corporation Fire resistant expansion joint
US4893444A (en) * 1988-05-02 1990-01-16 Armstrong World Industries, Inc. Fire expansion joint for ceiling runner
USRE33501E (en) * 1985-05-13 1990-12-25 National Rolling Mills, Inc. Fire-rated beam with expansion relief section
US5617694A (en) * 1994-04-27 1997-04-08 Kabushiki Kaisha Kenchiku Shiryo Kenkyusha Beam or girder joint element
US6131362A (en) * 1998-02-04 2000-10-17 Buecker Machine & Iron Works, Inc. Sheet metal beam
US6351919B1 (en) 2000-07-01 2002-03-05 Worthington Armstrong Venture Compression relief section
US6729100B2 (en) 2002-04-30 2004-05-04 Usg Interiors, Inc. Main tee splice
RU2233954C2 (ru) * 2001-03-06 2004-08-10 Уэртингтон Армстронг Венчер Соединение главных балок подвесного потолка
US20060162270A1 (en) * 2003-06-11 2006-07-27 Christof Maisch Profiled rail and method for producing a profiled rail
USD562120S1 (en) * 2006-09-08 2008-02-19 Henderson Andrew G Structural fastener
USD562121S1 (en) * 2006-09-08 2008-02-19 Henderson Andrew G Structural fastener
US20150040495A1 (en) * 2013-08-06 2015-02-12 Usg Interiors, Llc Channel cross member
US20190264446A1 (en) * 2016-11-14 2019-08-29 Certainteed Ceilings Corporation Support member for ceiling system
US10760268B2 (en) * 2018-08-10 2020-09-01 Worthington Armstrong Venture Multi-directional beam for a drywall ceiling soffit related application
US11053682B1 (en) * 2020-03-12 2021-07-06 Usg Interiors, Llc High strength main tee splice
US20230114856A1 (en) * 2020-03-23 2023-04-13 Saint-Gobain Placo Rail for suspended ceiling comprising expansion absorbers
USD1009309S1 (en) * 2020-04-21 2023-12-26 Rockwool A/S Grid tee for suspended ceiling

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2221231A (en) * 1987-11-06 1990-01-31 Rondo Building Services Ltd Frame for ceiling suspension system
AU606505B2 (en) * 1989-03-03 1991-02-07 Rondo Building Services Pty Limited Frame for ceiling suspension system

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159252A (en) * 1961-05-25 1964-12-01 Celotex Company Fire retardant ceiling suspension system
US3189138A (en) * 1961-10-24 1965-06-15 Eastern Prod Corp Ceiling construction
US3284977A (en) * 1965-04-08 1966-11-15 Lickliter Expansion splice
US3288489A (en) * 1963-07-05 1966-11-29 Chicago Metallic Sash Company Main runner coupling
US3367695A (en) * 1966-08-26 1968-02-06 W J Haertel & Co Ceiling suspension apparatus
US3388519A (en) * 1964-10-28 1968-06-18 Donn Prod Inc Controlled expansion structural beam and grid
US3397501A (en) * 1965-10-23 1968-08-20 Reinhardt H. Jahn Fire-rated runner with expansion section
US3457688A (en) * 1965-05-03 1969-07-29 Eastern Prod Corp Suspended ceiling
US3496690A (en) * 1967-04-17 1970-02-24 Chicago Metallic Sash Co Main runner part
CA848115A (en) * 1970-08-04 Reginald M. Russell, Jr. Structural beam
US3589089A (en) * 1969-10-20 1971-06-29 Eastern Prod Corp Structural beam for ceiling suspension system
US3778947A (en) * 1971-11-03 1973-12-18 Flangeklamp Corp Fire-rated grid member with controlled expansion means

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA848115A (en) * 1970-08-04 Reginald M. Russell, Jr. Structural beam
US3159252A (en) * 1961-05-25 1964-12-01 Celotex Company Fire retardant ceiling suspension system
US3189138A (en) * 1961-10-24 1965-06-15 Eastern Prod Corp Ceiling construction
US3288489A (en) * 1963-07-05 1966-11-29 Chicago Metallic Sash Company Main runner coupling
US3388519A (en) * 1964-10-28 1968-06-18 Donn Prod Inc Controlled expansion structural beam and grid
US3284977A (en) * 1965-04-08 1966-11-15 Lickliter Expansion splice
US3457688A (en) * 1965-05-03 1969-07-29 Eastern Prod Corp Suspended ceiling
US3397501A (en) * 1965-10-23 1968-08-20 Reinhardt H. Jahn Fire-rated runner with expansion section
US3367695A (en) * 1966-08-26 1968-02-06 W J Haertel & Co Ceiling suspension apparatus
US3496690A (en) * 1967-04-17 1970-02-24 Chicago Metallic Sash Co Main runner part
US3589089A (en) * 1969-10-20 1971-06-29 Eastern Prod Corp Structural beam for ceiling suspension system
US3778947A (en) * 1971-11-03 1973-12-18 Flangeklamp Corp Fire-rated grid member with controlled expansion means

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965632A (en) * 1974-07-19 1976-06-29 Questor Corporation Fire rated grid
US4021986A (en) * 1975-04-18 1977-05-10 Specified Ceiling Systems Modular ceiling framework
US4016701A (en) * 1975-11-18 1977-04-12 Ceiling And Drywall Products Limited Controlled expansion suspended ceiling grid member
US4208851A (en) * 1977-02-25 1980-06-24 Roblin Industries, Inc. Suspended ceiling system
US4442641A (en) * 1979-10-28 1984-04-17 Marley Tile A.G. Verge member for a pitched roof and roofing system incorporating the same
US4462198A (en) * 1981-04-03 1984-07-31 Ceiling Dynamics, Inc. Suspended ceiling system
US4549383A (en) * 1983-09-08 1985-10-29 Chicago Metallic Corporation Suspended ceiling grid system
US4586841A (en) * 1984-06-01 1986-05-06 Hunter Richard P Suspended ceiling
US4606166A (en) * 1985-05-13 1986-08-19 National Rolling Mills Inc. Fire-rated beam with expansion relief section
USRE33501E (en) * 1985-05-13 1990-12-25 National Rolling Mills, Inc. Fire-rated beam with expansion relief section
US4785603A (en) * 1986-11-28 1988-11-22 National Rolling Mills Inc. Interlocking cross tee
US4827681A (en) * 1986-11-28 1989-05-09 National Rolling Mills, Inc. Interlocking cross tee
US4794745A (en) * 1986-12-15 1989-01-03 National Rolling Mills Inc. Tier drop grid system
US4866900A (en) * 1987-11-23 1989-09-19 Chicago Metallic Corporation Drywall furring system
US4785595A (en) * 1988-01-29 1988-11-22 Chicago Metallic Corporation Fire-rated main runner
US4893444A (en) * 1988-05-02 1990-01-16 Armstrong World Industries, Inc. Fire expansion joint for ceiling runner
US4866898A (en) * 1988-06-20 1989-09-19 Manville Corporation Fire resistant expansion joint
US5617694A (en) * 1994-04-27 1997-04-08 Kabushiki Kaisha Kenchiku Shiryo Kenkyusha Beam or girder joint element
US6131362A (en) * 1998-02-04 2000-10-17 Buecker Machine & Iron Works, Inc. Sheet metal beam
US6351919B1 (en) 2000-07-01 2002-03-05 Worthington Armstrong Venture Compression relief section
RU2233954C2 (ru) * 2001-03-06 2004-08-10 Уэртингтон Армстронг Венчер Соединение главных балок подвесного потолка
US6729100B2 (en) 2002-04-30 2004-05-04 Usg Interiors, Inc. Main tee splice
US20060162270A1 (en) * 2003-06-11 2006-07-27 Christof Maisch Profiled rail and method for producing a profiled rail
US7574838B2 (en) * 2003-06-11 2009-08-18 Protekorwerk Florenz Maisch Gmbh & Co. Kg Profiled rail and method for producing a profiled rail
USD562120S1 (en) * 2006-09-08 2008-02-19 Henderson Andrew G Structural fastener
USD562121S1 (en) * 2006-09-08 2008-02-19 Henderson Andrew G Structural fastener
US8955273B1 (en) * 2013-08-06 2015-02-17 Usg Interiors, Llc Channel cross member
US20150040495A1 (en) * 2013-08-06 2015-02-12 Usg Interiors, Llc Channel cross member
US20190264446A1 (en) * 2016-11-14 2019-08-29 Certainteed Ceilings Corporation Support member for ceiling system
US10648177B2 (en) * 2016-11-14 2020-05-12 Certainteed Ceilings Corporation Support member for ceiling system
US10995490B2 (en) 2016-11-14 2021-05-04 Certainteed Ceilings Corporation Support member for ceiling system
US11608635B2 (en) 2016-11-14 2023-03-21 Certainteed Ceilings Corporation Support member for ceiling system
US10760268B2 (en) * 2018-08-10 2020-09-01 Worthington Armstrong Venture Multi-directional beam for a drywall ceiling soffit related application
US11306479B2 (en) 2018-08-10 2022-04-19 Worthington Armstrong Venture Multi-directional beam for a drywall ceiling soffit related application
US11053682B1 (en) * 2020-03-12 2021-07-06 Usg Interiors, Llc High strength main tee splice
US20230114856A1 (en) * 2020-03-23 2023-04-13 Saint-Gobain Placo Rail for suspended ceiling comprising expansion absorbers
US11788285B2 (en) * 2020-03-23 2023-10-17 Saint-Gobain Placo Rail for suspended ceiling comprising expansion absorbers
USD1009309S1 (en) * 2020-04-21 2023-12-26 Rockwool A/S Grid tee for suspended ceiling

Also Published As

Publication number Publication date
DE2316927A1 (de) 1973-10-18
FR2179123A1 (en:Method) 1973-11-16
CA966269A (en) 1975-04-22

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