US3913290A - Fire insulation edge reinforcements for structural members - Google Patents

Fire insulation edge reinforcements for structural members Download PDF

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Publication number
US3913290A
US3913290A US47884474A US3913290A US 3913290 A US3913290 A US 3913290A US 47884474 A US47884474 A US 47884474A US 3913290 A US3913290 A US 3913290A
Authority
US
United States
Prior art keywords
edge
flange
insulation
mesh
structural member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
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English (en)
Inventor
Rudolph W Billing
George K Castle
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.)
Avco Corp
Original Assignee
Avco Corp
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 Avco Corp filed Critical Avco Corp
Priority to US05478844 priority Critical patent/US3913290A/en
Priority to US05/544,168 priority patent/US4069075A/en
Priority to GB1034175A priority patent/GB1504735A/en
Priority to NL7503292A priority patent/NL7503292A/xx
Priority to CA222,863A priority patent/CA1035595A/en
Priority to DE19752513563 priority patent/DE2513563A1/de
Priority to NO751024A priority patent/NO150769C/no
Priority to FR7509328A priority patent/FR2265932B3/fr
Priority to JP3668375A priority patent/JPS5631423B2/ja
Application granted granted Critical
Publication of US3913290A publication Critical patent/US3913290A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • 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
    • E04B1/941—Building elements specially adapted therefor
    • E04B1/943—Building elements specially adapted therefor elongated
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/92—Fire or heat protection feature
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/92—Fire or heat protection feature
    • Y10S428/921—Fire or flameproofing
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249987—With nonvoid component of specified composition
    • Y10T428/24999—Inorganic
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/102—Woven scrim
    • Y10T442/109—Metal or metal-coated fiber-containing scrim
    • 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2631—Coating or impregnation provides heat or fire protection
    • Y10T442/2648—Coating or impregnation is specified as an intumescent material

Definitions

  • This invention provides an insulated reinforcement for use on structural members.
  • the reinforcement is supported on the structural member and the fireproofing material placed thereabout so as to protect and insulate the surface and respective edges of the members from damage due to heat during unplanned fires.
  • the reinforcement secures an insulation strip against the end of the structural flange. Fireproofing material is applied over the mesh and insulation strip in a thickness sufficient to protect the flanges and webs of the structural member.
  • the edge reinforcement 20 is constructed of a meshlike member such as wire mesh 18.
  • the wire mesh 18 is formed in a press brake or similar machine to the shape required for the member to be protected. Welded wire mesh is preferred and may either be with or without galvanizing.
  • the mesh size may be any suitable opening from one-fourth inch to 1 inch or greater.
  • the wire diameter should be small enough to reduce cost and permit easy forming, but large enough to hold the formed shape firmly.
  • One edge reinforcement having excellent fireproofing capabilities was constructed of one-half inch mesh and 19 gauge wire.
  • the formed wire 18A with the insulation22A in place is placed edge first into a mold (not shown) containing the casting material.
  • the edge reinforcement A is left in the mold until hardening of the edge material 24 occurs.
  • the reinforcement with the precast edge 24 is then stripped from the mold and is ready for shipping and installation.
  • a metal edge 24 may be stapled or welded on the reinforcement 20A in place of the precast edge.
  • the crimping tool 26 is seen to comprise a pair of forcing members or handles 28 and 30 pivotally connected together at 32.
  • the handle 28 includes an outer peripheral shoulder 34 and a vertically projecting shoulder 36.
  • the peripheral shoulder 34 acts against one leg of the wire mesh 18 and holds the mesh 18 against the flange 12.
  • the shoulder 36 abuts against the precast edge 24 along the exterior side of the insulation strips 22.
  • One end or shoulder 38 of the handle 30 engages the opposite leg of the wire mesh 18.
  • any suitable fireproofing material (not shown) is applied over the reinforcement 20 in a thickness which is sufficient to protect the flanges and webs of the structural member 10. These thicknesses are in practice determined by actual fire tests (i.e., ASTM E-119). However, the edges 14-16 of the reinforced flange do not now have to be built up in thickness; they merely have to be covered with enough material to produce a neat continuous coating.
  • the insulated reinforcement 20 works in the following manner. First of all, the presence of the insulation 22 inside the wire mesh 18 retards the perpendicular flow of heat into the edge of the flange 12, thus keeping it cooler for a longer period of time.
  • the wire mesh 18 itself holds the fireproofing material together all around the edges 14-16 and flange 12 as the material decomposes, intumesces, etc. This is especially important since the steel primers and paints which the coatings are applied over usually lose their bonding strength at temperature levels far below that which the steel itself may be safely allowed to reach, approximately 1000F. In the presence of bonding strength failure, the fireproofing mate rial has nothing holding it onto the steel except its own structural integrity. The wire reinforcement 18 provides this integrity if needed.
  • the edge reinforcement member of this invention may be formed in varying shapes depending on the desired end use. Different wire meshes may be employed, as well as different types of insulation. The insulation can be placed on the edge of the flange by any suitable means such as contact cement and the wire slipped over the insulation later. If a precast or metal edge is used, the type of material can be varies as long as it bonds well to the fireproofing material which is applied over it. The actual shape of the wire mesh will depend on the end use.
  • FIG. 9 is very similar to the FIG. 2 embodiment.
  • the difference in this instance is that the wire mesh 18D is formed with surface standoff dimples 42.
  • the dimples 42 will engage the flange with the majority of the wire mesh 18 being supported away from the surface of the flange. This permits better anchoring of the fireproofing material under the mesh.
  • the fire insulation reinforcement of this invention is also applicable for use on large flat surfaces such as walls, large cylindrical containers and the like.
  • FIGS. 10 and 11 a fragmentary view of a wall 44 is seen to be fire protected by a fire insulation reinforcement designated generally as 46.
  • the fire insulation reinforcement 46 is formed in the same manner as previously described.
  • the wire mesh 48 is mechanically attached to the wall by any suitable means. As an example, if the wall 44 is of steel plate, the wire mesh 48 may be secured thereto by spot welds 50. If the member will not support a weld, suitable means, such as support pins or the like, may be utilized to support the wire mesh in place.
  • the fireproof coating 52 is then applied over the wire mesh 48 such that the wire mesh is in effect encased in the fireproof material 52.
  • the material 52 will intumesce.
  • the fireproofing material very often will lose the bonding capabilities it has with the structural member.
  • fissures may occur in the material. If the wire mesh 48 was not used, sections of the fire protective material might fall off thereby exposing the structural member. However, the wire mesh 48 holds the fireproofing material 52 in place even though the material has lost its bonding effect. Similarly, if a fissure should develop, the fissure would be stopped in the wire mesh level and would not extend to the structural member.
  • the fireproof reinforcements of this invention overcome the disadvantages of prior methods of fireproofing structural members.
  • the fireproof reinforcement of this invention is simple in structure, easily applied to the flange portions and provides effective fireproofing when used with the fireproofing material, such as intumescent coatings and the like. Accordingly, it is seen that the objectives hereinbefore set forth have been accomplished.
  • a fire insulation structure comprising:
  • a mesh means around the periphery of said insulation means, said mesh means having leg portions extending beyond the insulation means, said leg portions being engageable with the flange portions of the structural member to secure said insulation means in an abutting relationship with the edge of the flange wherein a fireproof coating is applied over the entire structural member and mesh means thereby substantially reducing the amount of heat flow directed to the end and edges of the flange during fire conditions.
  • said mesh means is a wire mesh wherein said wire mesh holds the fireproofing coating together all around the edge and flange as the coating decomposes.
US05478844 1974-03-25 1974-06-13 Fire insulation edge reinforcements for structural members Expired - Lifetime US3913290A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US05478844 US3913290A (en) 1974-03-25 1974-06-13 Fire insulation edge reinforcements for structural members
US05/544,168 US4069075A (en) 1974-03-25 1975-01-27 Structural support for char derived from intumescent coatings
GB1034175A GB1504735A (en) 1974-03-25 1975-03-12 Fire protection of structural members
NL7503292A NL7503292A (nl) 1974-03-25 1975-03-19 Werkwijze voor het beschermen van constructie- -elementen tegen brand en daarmee beschermde elementen.
CA222,863A CA1035595A (en) 1974-03-25 1975-03-24 Fire protection of structural members
DE19752513563 DE2513563A1 (de) 1974-03-25 1975-03-24 Verbesserter feuerschutz von bau- und konstruktionselementen
NO751024A NO150769C (no) 1974-03-25 1975-03-24 Konstruksjonselement, samt fremgangsmaate for fremstilling av samme
FR7509328A FR2265932B3 (no) 1974-03-25 1975-03-25
JP3668375A JPS5631423B2 (no) 1974-03-25 1975-03-25

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45407774A 1974-03-25 1974-03-25
US05478844 US3913290A (en) 1974-03-25 1974-06-13 Fire insulation edge reinforcements for structural members

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US05/544,168 Continuation-In-Part US4069075A (en) 1974-03-25 1975-01-27 Structural support for char derived from intumescent coatings

Publications (1)

Publication Number Publication Date
US3913290A true US3913290A (en) 1975-10-21

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
US05478844 Expired - Lifetime US3913290A (en) 1974-03-25 1974-06-13 Fire insulation edge reinforcements for structural members
US05/544,168 Expired - Lifetime US4069075A (en) 1974-03-25 1975-01-27 Structural support for char derived from intumescent coatings

Family Applications After (1)

Application Number Title Priority Date Filing Date
US05/544,168 Expired - Lifetime US4069075A (en) 1974-03-25 1975-01-27 Structural support for char derived from intumescent coatings

Country Status (8)

Country Link
US (2) US3913290A (no)
JP (1) JPS5631423B2 (no)
CA (1) CA1035595A (no)
DE (1) DE2513563A1 (no)
FR (1) FR2265932B3 (no)
GB (1) GB1504735A (no)
NL (1) NL7503292A (no)
NO (1) NO150769C (no)

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US4529467A (en) * 1983-10-25 1985-07-16 Ppg Industries, Inc. Fire protective intumescent mastic composition and method employing same
US4669243A (en) * 1985-11-06 1987-06-02 Truswal Systems Corporation Fire protective system and method for a support structure
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US5433991A (en) * 1992-12-01 1995-07-18 Avco Corporation Reinforcement system for mastic intumescent fire protection coatings comprising a hybrid mesh fabric
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US5580648A (en) * 1992-12-01 1996-12-03 Avco Corporation Reinforcement system for mastic intumescent fire protection coatings
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US20140352243A1 (en) * 2013-06-03 2014-12-04 Philip Glen Miller Self-aligning corner bead for fireproofing structural steel member and method of using same
US9540813B2 (en) 2013-06-03 2017-01-10 Philip Glen Miller Self-aligning, double wire corner bead for fireproofing structural steel member and method of using same
US10036192B2 (en) * 2016-05-11 2018-07-31 Plastpro 2000, Inc. Reinforced mull post assembly
US10066392B2 (en) * 2016-09-29 2018-09-04 United States Gypsum Company One hour fire rated wooden frame members using lightweight gypsum wallboard
US10415237B1 (en) 2013-06-03 2019-09-17 Philip Glen Miller Self-aligning corner bead for fireproofing structural steel member and method of using same
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Cited By (72)

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Publication number Priority date Publication date Assignee Title
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Also Published As

Publication number Publication date
DE2513563A1 (de) 1975-10-02
CA1035595A (en) 1978-08-01
JPS5631423B2 (no) 1981-07-21
NO150769B (no) 1984-09-03
NL7503292A (nl) 1975-09-29
NO150769C (no) 1984-12-12
GB1504735A (en) 1978-03-22
JPS50159196A (no) 1975-12-23
NO751024L (no) 1975-09-26
FR2265932B3 (no) 1977-12-02
FR2265932A1 (no) 1975-10-24
US4069075A (en) 1978-01-17

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