US3786604A - Fire stop between floor slab and curtain wall of building - Google Patents

Fire stop between floor slab and curtain wall of building Download PDF

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Publication number
US3786604A
US3786604A US00205106A US3786604DA US3786604A US 3786604 A US3786604 A US 3786604A US 00205106 A US00205106 A US 00205106A US 3786604D A US3786604D A US 3786604DA US 3786604 A US3786604 A US 3786604A
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United States
Prior art keywords
building
foam
trough
slab
gap
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Expired - Lifetime
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US00205106A
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English (en)
Inventor
F Kramer
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U F Chemical Corp
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U F Chemical Corp
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Publication date
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Publication of US3786604A publication Critical patent/US3786604A/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
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6815—Expansion elements specially adapted for wall or ceiling parts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/66—Sealings
    • E04B1/68—Sealings of joints, e.g. expansion joints
    • E04B1/6801—Fillings therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92—Protection against other undesired influences or dangers
    • E04B1/94—Protection against other undesired influences or dangers against fire
    • E04B1/948—Fire-proof sealings or joints
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/88—Curtain walls

Definitions

  • ABSTRACT A fire stop separating superposed floors of a building having a concrete floor slab and a curtain wall horizontally separated by a gap to permit relative thermal expansion movement of the slab and wall essentially consists of a trough of pliable sheet steel filling the gap, and urea formaldehyde resin foam filling the upwardly open cavity of the trough, The foam chars, but does not burn in the event of a fire so as to retain its cellular structure and much of its thermal insulating properties, and the thin sheet steel can support the light foam and its own weight even at temperatures high enough to reduce the tensile strength of the steel.
  • the fire stops employed heretofore provide protection for only limited periods, and recent fires are known to have burned through many floors of supposedly fireproof, newly erected buildings of the type described within a fraction of whom because of the inadequacy of the conventional fire stops.
  • a fire stop consisting of a body of urea-formaldehyde resin foam supported on a shell of sheet steel thin enough to be pliable, yet strong enough to carry its own weight and that of the supported, light resin foam when installed in the gap between a concrete floor slab and an upright curtain wall is more durable in the event of a fire than the materials employed heretofore.
  • the fire stop of the invention does not load the structure with a significant burden, costs very little, and is as durable as any other material of construction whenprotected againstrust, the resin foam being unaffected by atmospheric conditions and parasites.
  • the fire stop of the invention consists of a trough member of metallic material secured in the gap btween a slab element and a wall element of the building to be protected and extending substantially from the inner face of the wall element to the edge face of the floor slab.
  • the upwardly open cavity of the trough is substantially completely filled by a body of urea formaldehyde resin foam.
  • the floor slab l of reinforced concrete separates an upper floor from a lower floor, the floors not being shown in detail, and is separatd from a curtain wall 2 by an air gap.
  • An elongated trough 3 of galvanized mild steel sheet extends along the entire air gap between the inner face 4 of the curtain wall 2 and the narrow edge face 5 of the floor'slab 1.
  • the trough 3 is of approximately U-shaped cross section, and the leg portions 6, 7 of the U-shape abuttingly engage the faces 4, 5 respectively.
  • a wide, flat lip portion 8 integral with the leg portion 7 engages the up wardly directed major surface 9 of the slab 1 in area contact.
  • the troughv 3 foam is relatively low, and that of charred foam is even is fulcrumed on the upper free edge of the slab 1, cannot pivot clockwise because of the abutting engagement of the leg portion 6 with the inner face 4, nor counterclockwise because of engagement of the lip portion 8 with the upwardly directed surface 9 of the slab 1.
  • a body 10 of urea-formaldehyde resin foam fills the upwardly open receptacle provided by the cavity of the trough 3 and overflows the receptacle to a small extent.
  • the fire stop essentially constituted by the trough 3 and the foam body 10 is installed by first cutting thin, glavanized sheet steel to the desired size, then bending it into the J-shape of a trough fitting between the faces 4, 5 under resilient compressive stress and ultimately folding the longer leg of the J-shape over the edge of the slab 1 to form the lip 8.
  • the steel sheet may be fastened temporarily to the wall face 4 and/or the upper slab surface 9 by drops of quick-curing epoxy cement or by means of adhesive tape to facilitate the bending operation in which the elements of the building itself are employed as bending forms.
  • the only tool required is a pair of tinsnips or strong scissors for cutting the sheet steel employed which may not have to be thicker than 2 mils, and is strong enough even under adverse conditions when it is 5 mils thick. Steel heavier than 0.0l0 inch is neither necessary nor even desirable under any conditions that I am presently aware of.
  • Urea formaldehyde resin foam is prepared from ureaformaldehyde precondensate, compressed air, a surfactant, water, and phoshporic acid as a catalyst in a conventional manner, using the foam generator of Bauer, U.S. Pat. No. 2,860,856 or equivalent equipment.
  • the foam is soft when ejected from the nozzle of the generator which is directed toward the open top of the trough 3.
  • the fresh foam confonns to the trough so as fully to occupy the receptacle available, and is preferably applied in a thickness of at least 4 inches and in slight excess so that it overflows the trough 3 and plugs any cracks that may exist between the trough 3 and the cooperating building elements 1, 2.
  • The'foam quickly solidifies and reaches its ultimate mechanical strength within a few days.
  • the mechanical strength of urea-formaldehyde resin lower.
  • the foam body 10 is not subjected to significant mechanical stresses duing its use in a fire.
  • Both the trough 3 and the foam [0 are resilient enough to absorb the changes in the width of the gap between the faces 4, 5 due to thermal expansion and contraction of the structural elements 1, 2.
  • Galvanized sheet steel is preferred because of ther rust protection afforded by the zinc coating, but phosphate conversion coatings and like surface treatments may be resorted to in a known manner.
  • Aluminum and its alloys have been found to have melting points too low for performing the intended task, and any metal other than steel and employed for making the trough 3 should have a melting point well above that of aluminum.
  • plastic foam No full adequate plastic foam is available at this time to replace the urea-formaldehyde foam described above.
  • Some plastic foams, such as polyurethane foam, are flammable, and others give off noxious or even toxic vapors, as in the case of phenol-formaldehyde resin foam.
  • Urea-formaldehyde resin foam is most economical at this time, and the cost of the fire stops of the invention is minimal both in materials and in labor required for installation.
  • leg portion 6 is fastened initially to the wall face 4, it is not necessary to attach the lip portion 8 to the slab surface 9. When the gap between the faces 4, 5 widens due to thermal stresses or otherwise, the lip portion 8 may then slide freely on the slab surface 9.
  • a trough member of resilient sheet steel having a thickness of 0.002 to 0.010 inch secured in said gap and extending substantially from one of said faces to the other face
  • said trough member defining an upwardly open receptacle
  • said one element being said wall element and said lip portion engaging the major surface of said slab element directed toward an upper floor.
  • said trough member being of arcuate cross section in a vertical plane perpendicular to said inner face.
  • said lip portion being planar and substantially parallel to the engaged surface of said slab element.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)
US00205106A 1971-12-06 1971-12-06 Fire stop between floor slab and curtain wall of building Expired - Lifetime US3786604A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20510671A 1971-12-06 1971-12-06

Publications (1)

Publication Number Publication Date
US3786604A true US3786604A (en) 1974-01-22

Family

ID=22760815

Family Applications (1)

Application Number Title Priority Date Filing Date
US00205106A Expired - Lifetime US3786604A (en) 1971-12-06 1971-12-06 Fire stop between floor slab and curtain wall of building

Country Status (3)

Country Link
US (1) US3786604A (fr)
BE (1) BE792282A (fr)
LU (1) LU66589A1 (fr)

Cited By (67)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449341A (en) * 1982-04-01 1984-05-22 Ppg Industries, Inc. Fire containment arrangement for curtain wall construction
US4455802A (en) * 1982-06-17 1984-06-26 Joseph Charniga Wire screen fire stops
US4531332A (en) * 1982-07-21 1985-07-30 Yoshida Kogyo K. K. Rooftop parapet for thermally-insulated curtain wall
US4733514A (en) * 1986-04-08 1988-03-29 Kelly Thomas L Building construction with meltable insulation and reservoir trough therefor
US4866898A (en) * 1988-06-20 1989-09-19 Manville Corporation Fire resistant expansion joint
US5088249A (en) * 1988-04-21 1992-02-18 Roland-Werke Dachbaustoffe Und Bauchemie Gmbh & Co. Kg Roof covering or wall covering
US5187910A (en) * 1989-10-02 1993-02-23 Mm Systems Corporation Fire barrier system
GB2261892A (en) * 1991-11-29 1993-06-02 Simpkin Machin & Company Limit Fire seal for building joints
US5765332A (en) * 1995-02-21 1998-06-16 Minnesota Mining And Manufacturing Company Fire barrier protected dynamic joint
US6131352A (en) * 1995-01-26 2000-10-17 Barnes; Vaughn Fire barrier
US20040045234A1 (en) * 2001-10-31 2004-03-11 W.R. Grace & Co.-Conn. In situ molded thermal barriers
US20050102941A1 (en) * 2003-11-04 2005-05-19 E.M.E.H., Inc. Fire barrier system for building panels
US20060137293A1 (en) * 2004-12-20 2006-06-29 Klein James A Head-of-wall fireblocks and related wall assemblies
US7424793B1 (en) * 2004-05-07 2008-09-16 Thermafiber, Inc. Interlocking curtain wall insulation system
US20090126297A1 (en) * 2007-11-16 2009-05-21 Specified Technologies Inc. Thermal insulation and sealing means for a safing slot
US20090178369A1 (en) * 2008-01-16 2009-07-16 California Expanded Metal Products Company Exterior wall construction product
US20100107532A1 (en) * 2008-10-31 2010-05-06 Thermafiber, Inc. Methods and apparatuses for positioning and securing safing insulation
CN1762511B (zh) * 2004-10-21 2010-06-09 深圳市方大装饰工程有限公司 通风式幕墙防火装置
US20110011019A1 (en) * 2009-07-14 2011-01-20 Specified Technologies Inc. Firestopping sealing means for use with gypsum wallboard in head-of-wall construction
US20110016808A1 (en) * 2009-07-23 2011-01-27 Balco, Inc Fire barrier
US20110314756A1 (en) * 2007-01-19 2011-12-29 Balco, Inc. Fire barrier
US8555566B2 (en) 2007-08-06 2013-10-15 California Expanded Metal Products Company Two-piece track system
US8590231B2 (en) 2012-01-20 2013-11-26 California Expanded Metal Products Company Fire-rated joint system
US8595999B1 (en) 2012-07-27 2013-12-03 California Expanded Metal Products Company Fire-rated joint system
US8640415B2 (en) 2010-04-08 2014-02-04 California Expanded Metal Products Company Fire-rated wall construction product
US8671632B2 (en) 2009-09-21 2014-03-18 California Expanded Metal Products Company Wall gap fire block device, system and method
US8671645B1 (en) * 2008-10-31 2014-03-18 Owens Corning Intellectual Capital, Llc Safing insulation with pre-applied smoke sealant
US8793947B2 (en) 2010-04-08 2014-08-05 California Expanded Metal Products Company Fire-rated wall construction product
GB2510475A (en) * 2012-12-11 2014-08-06 Mull It Over Products Wall cap for location between exterior and interior walls of a building, such as in a curtain wall.
US9045899B2 (en) 2012-01-20 2015-06-02 California Expanded Metal Products Company Fire-rated joint system
US9127454B2 (en) 2007-08-22 2015-09-08 California Expanded Metal Products Company Fire-rated wall and ceiling system
US9523193B2 (en) 2012-01-20 2016-12-20 California Expanded Metal Products Company Fire-rated joint system
US20170145685A1 (en) * 2015-11-24 2017-05-25 Hilti Aktiengesellschaft Fire-resistance-rated thermally insulating and sealing system for use with curtain wall structures
CN106836518A (zh) * 2017-02-28 2017-06-13 中国冶集团有限公司 钢结构楼板与砼结构间的伸缩缝施工方法
US9683364B2 (en) 2010-04-08 2017-06-20 California Expanded Metal Products Company Fire-rated wall construction product
US9752318B2 (en) 2015-01-16 2017-09-05 California Expanded Metal Products Company Fire blocking reveal
US20180010333A1 (en) * 2015-02-13 2018-01-11 Hilti Aktiengesellsschaft Joint-sealing element and sealing arrangement with such a joint-sealing element
US9879421B2 (en) 2014-10-06 2018-01-30 California Expanded Metal Products Company Fire-resistant angle and related assemblies
US9909298B2 (en) 2015-01-27 2018-03-06 California Expanded Metal Products Company Header track with stud retention feature
US20180106034A1 (en) * 2015-04-17 2018-04-19 3M Innovative Properties Company A fire-resistant building joint system
US20180112392A1 (en) * 2015-04-17 2018-04-26 3M Innovative Properties Company A smoke and sound barrier for a building joint system
US10000923B2 (en) 2015-01-16 2018-06-19 California Expanded Metal Products Company Fire blocking reveal
US10077550B2 (en) 2012-01-20 2018-09-18 California Expanded Metal Products Company Fire-rated joint system
US10138629B2 (en) * 2015-02-13 2018-11-27 Hilti Aktiengesellschaft Facade assembly, building structure, and method for mounting the facade assembly
US20180345059A1 (en) * 2015-11-25 2018-12-06 3M Innovative Properties Company Firestop system for marine or off-shore applications
US10184246B2 (en) 2010-04-08 2019-01-22 California Expanded Metal Products Company Fire-rated wall construction product
US10202759B2 (en) * 2017-05-19 2019-02-12 Hilti Aktiengesellschaft Dynamic, fire-resistance-rated thermally insulating and sealing system having a F-rating of 120 min for use with curtain wall structures
US10415239B2 (en) * 2015-09-17 2019-09-17 Hilti Aktiengesellschaft Facade assembly, building construction and method for mounting the facade assembly
US20190360195A1 (en) * 2018-03-15 2019-11-28 California Expanded Metal Products Company Fire-rated joint component and wall assembly
CN110593427A (zh) * 2019-09-24 2019-12-20 中国五冶集团有限公司 一种楼梯休息平台防火封堵的施工工艺
US10538915B1 (en) * 2019-03-14 2020-01-21 Hilti Aktiengesellschaft Process for assembling a fire-, smoke-, sound- and/or water-proof system within a dynamic curtain wall façade
US10563399B2 (en) * 2007-08-06 2020-02-18 California Expanded Metal Products Company Two-piece track system
US20200080300A1 (en) * 2018-08-16 2020-03-12 California Expanded Metal Products Company Fire or sound blocking components and wall assemblies with fire or sound blocking components
US10619347B2 (en) 2007-08-22 2020-04-14 California Expanded Metal Products Company Fire-rated wall and ceiling system
US10689842B2 (en) 2018-03-15 2020-06-23 California Expanded Metal Products Company Multi-layer fire-rated joint component
US10914065B2 (en) 2019-01-24 2021-02-09 California Expanded Metal Products Company Wall joint or sound block component and wall assemblies
US20210230869A1 (en) * 2016-05-20 2021-07-29 Hilti Aktiengesellschaft Thermal and acoustic insulating and sealing system for a safing slot in a curtain wall
US11091908B2 (en) * 2016-04-13 2021-08-17 Hilti Aktiengesellschaft Thermal and acoustic insulating and sealing means for a safing slot in a curtain wall
US11162259B2 (en) 2018-04-30 2021-11-02 California Expanded Metal Products Company Mechanically fastened firestop flute plug
US11268274B2 (en) 2019-03-04 2022-03-08 California Expanded Metal Products Company Two-piece deflection drift angle
US11486150B2 (en) 2016-12-20 2022-11-01 Clarkwestern Dietrich Building Systems Llc Finishing accessory with backing strip
US11713572B2 (en) * 2017-05-19 2023-08-01 Hilti Aktiengesellschaft Process for assembling a unitized panel for use within an exterior dynamic curtain wall assembly
US11885138B2 (en) 2020-11-12 2024-01-30 Clarkwestern Dietrich Building Systems Llc Control joint
US11920343B2 (en) 2019-12-02 2024-03-05 Cemco, Llc Fire-rated wall joint component and related assemblies
USD1026252S1 (en) 2020-11-12 2024-05-07 Clarkwestern Dietrich Building Systems Llc Control joint
US12215498B2 (en) 2012-01-20 2025-02-04 Cemco, Llc Fire-rated joint system
US12454824B2 (en) 2020-08-19 2025-10-28 Cemco, Llc Building joint with compressible firestopping component

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Publication number Priority date Publication date Assignee Title
US1031926A (en) * 1911-03-23 1912-07-09 George W Hansbrough Building construction.
US2291616A (en) * 1938-05-02 1942-08-04 Plastergon Wall Board Company Method of coating webs
US2616866A (en) * 1949-04-26 1952-11-04 Pyrotron Dev Corp Fire retardant

Cited By (146)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4449341A (en) * 1982-04-01 1984-05-22 Ppg Industries, Inc. Fire containment arrangement for curtain wall construction
US4455802A (en) * 1982-06-17 1984-06-26 Joseph Charniga Wire screen fire stops
US4531332A (en) * 1982-07-21 1985-07-30 Yoshida Kogyo K. K. Rooftop parapet for thermally-insulated curtain wall
US4733514A (en) * 1986-04-08 1988-03-29 Kelly Thomas L Building construction with meltable insulation and reservoir trough therefor
US5088249A (en) * 1988-04-21 1992-02-18 Roland-Werke Dachbaustoffe Und Bauchemie Gmbh & Co. Kg Roof covering or wall covering
US4866898A (en) * 1988-06-20 1989-09-19 Manville Corporation Fire resistant expansion joint
US5187910A (en) * 1989-10-02 1993-02-23 Mm Systems Corporation Fire barrier system
GB2261892A (en) * 1991-11-29 1993-06-02 Simpkin Machin & Company Limit Fire seal for building joints
US6131352A (en) * 1995-01-26 2000-10-17 Barnes; Vaughn Fire barrier
US5765332A (en) * 1995-02-21 1998-06-16 Minnesota Mining And Manufacturing Company Fire barrier protected dynamic joint
US20040045234A1 (en) * 2001-10-31 2004-03-11 W.R. Grace & Co.-Conn. In situ molded thermal barriers
US7152385B2 (en) * 2001-10-31 2006-12-26 W.R. Grace & Co.-Conn. In situ molded thermal barriers
US20050102941A1 (en) * 2003-11-04 2005-05-19 E.M.E.H., Inc. Fire barrier system for building panels
EP1689949A4 (fr) * 2003-11-04 2007-09-26 Emeh Inc Joint coupe feu pour panneaux de construction
US7424793B1 (en) * 2004-05-07 2008-09-16 Thermafiber, Inc. Interlocking curtain wall insulation system
US7886491B1 (en) * 2004-05-07 2011-02-15 Thermafiber, Inc. Interlocking curtain wall insulation system
US7765753B1 (en) 2004-05-07 2010-08-03 Thermafiber, Inc. Interlocking curtain wall insulation system
CN1762511B (zh) * 2004-10-21 2010-06-09 深圳市方大装饰工程有限公司 通风式幕墙防火装置
US20060137293A1 (en) * 2004-12-20 2006-06-29 Klein James A Head-of-wall fireblocks and related wall assemblies
US8181404B2 (en) * 2004-12-20 2012-05-22 James Alan Klein Head-of-wall fireblocks and related wall assemblies
US8601760B2 (en) * 2007-01-19 2013-12-10 Balco, Inc. Fire barrier
US20110314756A1 (en) * 2007-01-19 2011-12-29 Balco, Inc. Fire barrier
US12252881B2 (en) 2007-08-06 2025-03-18 Cemco, Llc Two-piece track system
US9995039B2 (en) 2007-08-06 2018-06-12 California Expanded Metal Products Company Two-piece track system
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US10011983B2 (en) 2007-08-22 2018-07-03 California Expanded Metal Products Company Fire-rated wall and ceiling system
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US11802404B2 (en) 2007-08-22 2023-10-31 Cemco, Llc Fire-rated wall and ceiling system
US9481998B2 (en) 2007-08-22 2016-11-01 California Expanded Metal Products Company Fire-rated wall and ceiling system
US11466449B2 (en) 2007-08-22 2022-10-11 California Expanded Metal Products Company Fire-rated wall and ceiling system
US9127454B2 (en) 2007-08-22 2015-09-08 California Expanded Metal Products Company Fire-rated wall and ceiling system
US20090126297A1 (en) * 2007-11-16 2009-05-21 Specified Technologies Inc. Thermal insulation and sealing means for a safing slot
US7856775B2 (en) * 2007-11-16 2010-12-28 Specified Technologies Inc. Thermal insulation and sealing means for a safing slot
US8499512B2 (en) 2008-01-16 2013-08-06 California Expanded Metal Products Company Exterior wall construction product
US20090178369A1 (en) * 2008-01-16 2009-07-16 California Expanded Metal Products Company Exterior wall construction product
US9016014B2 (en) 2008-10-31 2015-04-28 Thermafiber, Inc. Methods and apparatuses for positioning and securing safing insulation
US20100107532A1 (en) * 2008-10-31 2010-05-06 Thermafiber, Inc. Methods and apparatuses for positioning and securing safing insulation
US8683763B2 (en) 2008-10-31 2014-04-01 Owens Corning Intellectual Capital, Llc Methods and apparatuses for positioning and securing safing insulation
US8671645B1 (en) * 2008-10-31 2014-03-18 Owens Corning Intellectual Capital, Llc Safing insulation with pre-applied smoke sealant
US20110011019A1 (en) * 2009-07-14 2011-01-20 Specified Technologies Inc. Firestopping sealing means for use with gypsum wallboard in head-of-wall construction
US8375666B2 (en) * 2009-07-14 2013-02-19 Specified Technologies Inc. Firestopping sealing means for use with gypsum wallboard in head-of-wall construction
US8584415B2 (en) * 2009-07-14 2013-11-19 Specified Technologies Inc. Firestopping sealing means for use with gypsum wallboard in head-of-wall construction
US20110016808A1 (en) * 2009-07-23 2011-01-27 Balco, Inc Fire barrier
US9616259B2 (en) 2009-09-21 2017-04-11 California Expanded Metal Products Company Wall gap fire block device, system and method
US8671632B2 (en) 2009-09-21 2014-03-18 California Expanded Metal Products Company Wall gap fire block device, system and method
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US11896859B2 (en) 2009-09-21 2024-02-13 Cemco, Llc Wall gap fire block device, system and method
US9931527B2 (en) 2009-09-21 2018-04-03 California Expanded Metal Products Company Wall gap fire block device, system and method
US8640415B2 (en) 2010-04-08 2014-02-04 California Expanded Metal Products Company Fire-rated wall construction product
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LU66589A1 (fr) 1973-02-08
BE792282A (fr) 1973-06-05

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