EP0442810B1 - Wasserdichteindeckung mit einem Tragteil, einer Dämmschicht und einem Dichtungsbelag - Google Patents

Wasserdichteindeckung mit einem Tragteil, einer Dämmschicht und einem Dichtungsbelag Download PDF

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Publication number
EP0442810B1
EP0442810B1 EP91400366A EP91400366A EP0442810B1 EP 0442810 B1 EP0442810 B1 EP 0442810B1 EP 91400366 A EP91400366 A EP 91400366A EP 91400366 A EP91400366 A EP 91400366A EP 0442810 B1 EP0442810 B1 EP 0442810B1
Authority
EP
European Patent Office
Prior art keywords
piece
supporting element
head
layer
roofing according
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
EP91400366A
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English (en)
French (fr)
Other versions
EP0442810A1 (de
Inventor
Francis Ovaert
Henri Desgouilles
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.)
Axter SA
Original Assignee
Axter SA
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 Axter SA filed Critical Axter SA
Priority to AT91400366T priority Critical patent/ATE99372T1/de
Publication of EP0442810A1 publication Critical patent/EP0442810A1/de
Application granted granted Critical
Publication of EP0442810B1 publication Critical patent/EP0442810B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/14—Fastening means therefor
    • E04D5/141—Fastening means therefor characterised by the location of the fastening means
    • E04D5/143—Fastening means therefor characterised by the location of the fastening means in the field of the flexible material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
    • E04D3/36—Connecting; Fastening
    • E04D3/3601—Connecting; Fastening of roof covering supported by the roof structure with interposition of a insulating layer
    • E04D3/3603—Connecting; Fastening of roof covering supported by the roof structure with interposition of a insulating layer the fastening means being screws or nails
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/14—Fastening means therefor
    • E04D5/144—Mechanical fastening means
    • E04D5/145—Discrete fastening means, e.g. discs or clips
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/14—Fastening means therefor
    • E04D5/144—Mechanical fastening means
    • E04D5/147—Mechanical fastening means not perforating the flexible material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D5/00—Roof covering by making use of flexible material, e.g. supplied in roll form
    • E04D5/14—Fastening means therefor
    • E04D5/148—Fastening means therefor fastening by gluing

Definitions

  • the present invention relates to insulating and waterproof covers, in particular for industrial buildings; these covers include an insulating layer and a waterproofing coating, the assembly being fixed on a roofing support element which is either a concrete support element or a ribbed sheet fixed transversely to the purlins of the frame.
  • the present invention relates more particularly to a device for fixing said insulating layer and said sealing coating on the carrier element.
  • the fixing of the plates or panels of the insulating layer on the support element is carried out by gluing when the support element is made of concrete, or by mechanical fixing when the support element is a ribbed sheet.
  • a mechanical fixing consists of a screw, a rivet or a stud, made integral with the ribbed sheet by drilling or welding. At the free end of the screw, the rivet or the stud, there is a small washer, with a diameter of the order of 50 to 70 mm.
  • the waterproofing coating is made integral with the insulation plates by bonding or by welding using a hot source, most often by a flame or air torch, over the entire surface of the panels or in line with the washers of mechanical fasteners, the latter being able to be improved for welding by an appropriate surface coating or by a washer, of the same material as the sealing coating, and of larger dimension, interposed between the metal washer and the insulating panel under -jacent.
  • a more recent technique provides for the dry unwinding on the insulating panels of a first bed of sheets constituting the lower part of the sealing coating, the mechanical fasteners then passing through the bed of sheets and the insulating panels.
  • a preliminary heat shield can be used on the insulation.
  • the upper part of the waterproof coating is then glued or welded to the lower part with its visible washers.
  • Another technique provides for mechanical fastenings to the right of the covering joints of the strips of the waterproofing coating.
  • the covered part is glued, or welded on the one hand on the edge of the adjacent strip, and on the other hand on the small washers of the fixings.
  • the lower sheet of the waterproofing coating is pierced by mechanical fixing.
  • the rupture is located at the level of the bonding plane of the sealing coating on the washer, or by unbuttoning the fixing head through the washer, or by tearing off the fixing through the ribbed steel sheet.
  • the breaking values are relatively homogeneous, of the order of 900 to 1300 N.
  • the present invention therefore aims to achieve an insulating and waterproof cover with a reduced density of fasteners and, as a result, whose implementation is simpler and faster than that of classic blankets.
  • the invention relates to a waterproof cover, in particular for a building, comprising a support element in ribbed steel or in masonry, a layer of insulating material placed on this support element, and a coating of sealing covering the layer of insulating material, means being provided to keep these different constituents assembled, these means comprising a first member comprising a head and connected to the carrier element and a second member fixed to the first member from the face exterior of the layer of insulating material, characterized in that the first member is connected to the support element and retained with respect to the latter by means of a rigid flat base which is glued to the support element by a zone of dimensions substantially greater than those of said head, and which defines retaining means cooperating with this same head.
  • the device for fixing such a cover is identical, whether the support element is made of concrete with or without vapor barrier, or of ribbed sheet steel.
  • This high performance device makes it possible to use a maximum of one fixing per m2 of coverage (or even one for two m2), thus dividing by more than 5, compared to the conventional techniques previously described, the total number of fastenings.
  • FR-A-2 223 532 describes a waterproof cover in accordance with the preamble of claim 1 above, but where the head of said first member is directly welded to the carrier element.
  • the assembly means comprise a flexible plate, and the second member bears on this flexible plate by means of an enlarged head and / or a rigid washer, the dimension of the enlarged head or rigid washer being intermediate between the maximum dimension of the first or second member in the vicinity of the external surface of the layer of insulating material, and the dimension of the flexible plate.
  • the large base makes it possible to obtain, at the level of the carrying element, a pull-out resistance of 5,000 N; the fastening assembly is designed and dimensioned to also have a pull-out resistance of the same value, that is to say of 5,000 N; finally, the presence of the large flexible plate, for example a circular plate of 250 mm in diameter, also makes it possible to obtain, at the fixing of the sealing layer, a tear resistance of the same value, 5,000 N.
  • the flexible plate has a tear resistance Rd greater than or equal to 200 N, measured according to the UEATC method 5.4.1., July 1982, and the diameter d of the first or second member at vicinity of the outer surface of the layer of insulating material is at least equal to 6 mm.
  • the first member comprises a hollow body and the second member is a screw, completed by a rigid washer.
  • the first member comprises a rod and the second member consists of a plug having a hollow elongated part and a rigid flat head.
  • Figs. 1 and 2 are sectional representations of two embodiments of the invention.
  • the assembly means firstly comprise a base 1 which is glued to the load-bearing element of the roof, which is a concrete support in the example shown.
  • This base 1 is of large dimensions, it is for example circular and its surface is determined so as to have a resistance to tearing off of great value, for example 5,000 N.
  • the base can have a diameter greater than or equal to 140 mm.
  • This base 1 is made for example from sheet metal 1 mm thick or from material army plastic.
  • the base is glued to the support element, whether it is a ribbed steel sheet which can be galvanized or pre-painted or a concrete support with or without a vapor barrier.
  • this base by gluing has the advantage of not requiring drilling or pegging if it is a load-bearing concrete element; in the case of a load-bearing element consisting of a ribbed sheet, there are no visible fixings on the underside of the sheet.
  • the bonding of the base which is carried out on site during the production of the cover, is carried out for example by a cold adhesive of epoxy type or by heating with the flame of a torch of a base comprising a coating hot melt; one can also provide a self-adhesive coating on the ribbed sheet.
  • the fixing assembly proper comprises a first fixed member, which is integral with the base 1, and a second member which has a rigid support washer and which is fixed on said fixed member.
  • the first member consists of a substantially cylindrical hollow body 3 internally threaded and provided with a conical head 5 received in a housing 4 of conjugate shape of the base 1.
  • the second fixing member is constituted by a screw or the like 6 which is screwed into the hollow body 3 and which comprises a flat countersunk head 7 under which a rigid washer 8 is arranged.
  • the first member is constituted by a screw or threaded rod 11 having a milled flat head 12 received in a conjugate housing 13 of the base 1.
  • the second member is constituted by a sort of hollow plug 14 internally threaded which is screwed onto the rod 11 and which has a rigid flat head 15.
  • the head of the first member namely the head 5 of the hollow body 3 or the head 12 of the rod 11, can itself be fixed by gluing or simply held in the housing 4, respectively 13, of the 'base.
  • the last element of the fixing device according to the invention consists of a flexible plate 21 which is mounted under the rigid washer 8 or the rigid head 15.
  • This flexible plate has a tear resistance Rd (measured according to the UEATC method 5.4. 1., July 1982) greater than or equal to 200 N and preferably equal to 400 N.
  • Rd tear resistance measured according to the UEATC method 5.4. 1., July 1982
  • the diameter d of the first member 3, in the embodiment of FIG. 1, or of the second member 14, in the mode of embodiment of FIG. 2, in the vicinity of the external surface of the insulating layer is at least equal to 6 mm and, preferably, equal to 10 mm.
  • the bases are first fixed with the fixed members of the fixing assemblies on the load-bearing element of the roof by gluing, then the plates are put in place of insulating material by "impaling" them on the fixed members of the fixing assemblies; then the insulating layer is fixed by means of the second member of the fixing assemblies by placing the flexible plate below the rigid washer or the rigid head.
  • the different strips of the sealing layer are then put in place, which are fixed simply by welding or gluing at each fixing point on the flexible plate and on the rigid washer.
  • a particularly resistant fixing is then obtained at each point, for example a resistance of 5,000 N, because all the elements of the fixing device, namely the base, the first and second members and the rigid washer, are dimensioned and calculated to hold this resistance of 5,000 N.
  • the invention therefore makes it possible to produce a mixed fastening, namely mechanical as regards the waterproofing coating and by gluing as regards the carrier element, which makes it possible to multiply by an important factor, of the order of 5 , the resistance to tearing of each fixing point as regards both the insulating layer and the waterproofing coating; it is therefore possible to provide one fixing per m2 instead of 5 according to known fixing techniques. This results in a saving of manpower and a saving of time for the mounting of a cover.
  • the fastening assembly is flush with the upper level of the insulating panels and there is therefore no possibility of punching the waterproofing coating, unlike what happens when conventional mechanical fasteners are used.
  • the rigid washer or the flat cap head has a high rigidity which is generally greater than that of similar washers used in the prior art.
  • the fixing device described above also makes it possible to use a more compressible insulator than that which is the case in conventional covers, provided that the panels of the insulating layer are deformed in their elastic range. Indeed, these panels serve as a simple support for the sealing coating without there being any mechanical connection. If a settlement has to occur, for example under the effect of a load or the passage of a person, near a fixing, it is the flexible plate which will ensure the differences in level of the cover. Because the insulating layer and the sealing coating are not integral, the insulating layer may have significant dimensional variations without this hindering the proper functioning of the sealing coating; in particular, cracks cannot occur at the joints of the panels of the insulating layer.
  • Glass wool can also be used with a density less than 90 kg / m3 instead of the usual 100 kg / m3.
  • the different elements can be dimensioned as follows.
  • a circular base can be used whose diameter is at least 140 mm.
  • the attachment of the second member of the fastening element to the first member must also have a similar resistance; this attachment can be achieved by screwing, by clipping or by bayonet attachment.
  • the rigid washer 8 or the flat head 15 may have a diameter a of conventional dimensions, that is to say of the order of 80 mm.
  • the flexible plate it is advantageously circular and its diameter D is determined in such a way that the difference (D - a) is between 100 and 170 mm; one can for example use flexible plates whose diameter is 250 mm.
  • the diameter D is equal to the diameter of the largest circle inscribed in the surface of the flexible plate.
  • the flexible plate can also be made of thin metal, optionally comprising a surface coating compatible with the sealing material.
  • This plate can be returned previously secured to the rigid washer 8 or the flat head 15 by bonding or welding; this operation can be carried out in the factory before the installation operation.
  • the plate is coated with a material identical to that of the sealing layer or compatible with it.
  • the diameter d of the first or second member in the vicinity of the outer face of the insulation 10 must be chosen so that the tear resistance of the flexible plate is sufficient; this diameter will not be less than 6 mm and preferably equal to 10 mm.
  • the diameter of the washer or rigid head a and the diameter d of the fixing element are chosen such that the difference (a - d) is approximately equal to 90 mm and in any case greater than 70 mm. This prevents the flexible plate 21 from "escaping" the rigid part 8 or 15 by sliding, tearing or unbuttoning.
  • Fig. 3 shows an alternative embodiment of the invention in which the supporting element of the roof is constituted by a ribbed sheet 31.
  • the fixing assembly consists of a first screw 32 fixed in the 'base 33, of a hollow cylindrical body 34, preferably insulating, screwed on the screw 32; and a second flat countersunk head screw 35 screwed into the upper part of the body 34.
  • the hollow body 34 forms a spacer and has a height substantially equal to the thickness of the insulating layer 36.
  • the distance separating the upper face of the base and the underside of the washer or of the rigid head is substantially equal to the thickness of the insulating layer.
  • Fig. 4 a variant of the embodiment of FIG. 2 in which the plug 41 has a reinforcement 42 at its upper part so as to obtain the desired diameter d .
  • Fig. 5 shows another alternative embodiment in which the flexible plate 51 is crimped between two rigid washers 52 and 53. This variant applies to the embodiment of FIG. 1.
  • the fixing assembly constituted by the base and the first and second members is advantageously made rigid during its assembly; for this purpose, in the final position, in the case of FIG. 1, the rigid washer 8 abuts against the cylindrical part 3 and the edges of the housing 4 are in abutment on the cylindrical part 3.
  • the lower washer 52 is in abutment on the first member 50.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Cable Accessories (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Building Environments (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Packaging Of Annular Or Rod-Shaped Articles, Wearing Apparel, Cassettes, Or The Like (AREA)
  • Ink Jet (AREA)

Claims (13)

  1. Dichte Abdeckung mit einem Trägerelement (2) aus geripptem Stahl oder aus Mauerwerk, einer auf dem Trägerelement angeordneten Isoliermaterialschicht (10) und einer die Isolïermaterialschicht (10) bedeckenden Dichtverkleidung (20), wobei zum zusammenhalten der verschiedenen Bestandteile Einrichtungen (1, 3-8; 11-15) vorgesehen sind, die ein erstes Organ (3; 11), das einen Kopf aufweist und mit dem Trägerelement (2) verbunden ist, und ein zweites Organ (6; 14), das von der Außenseite der Isoliermaterialschicht (10) her an dem ersten Organ befestigt ist, aufweisen, dadurch gekennzeichnet, daß das erste Organ (3; 11) mit dem Trägerelement (2) verbunden ist und an diesem mittels einer starren, ebenen Grundplatte (1) festgehalten ist, die über einen Bereich, dessen Abmessungen wesentlich größer sind als diejenigen des Kopfes, auf das Trägerelement (2) aufgeklebt ist und die mit dem jeweiligen Kopf zusammenwirkenden Halteeinrichtungen begrenzt.
  2. Abdeckung nach Anspruch 1, dadurch gekennzeichnet, daß die verbindungseinrichtungen eine biegsame Platte (21) aufweisen, und daß das zweite Organ (6; 14) über einen vergrößerten Kopf (15) und/oder eine starre Scheibe (8) an der biegsamen Platte abgestützt ist, wobei die Abmessung (a) des vergrößerten Kopfes oder der starren Scheibe zwischen der maximalen Abmessung (d) des ersten (3; 11) oder des zweiten Organs (6; 14) in der Nähe der Außenfläche der Isoliermaterialschicht (10) und der Abmessung (D) der biegsamen Platte liegt.
  3. Abdeckung nach Anspruch 2, dadurch gekennzeichnet, daß, wenn a den Durchmesser des vergrößerten Kopfes (15) oder der starren Scheibe (8), d den Durchmesser des ersten (3; 11) oder des zweiten Organs (6; 14) in der Nähe der Außenseite der Isoliermaterialschicht (10), D den Durchmesser der biegsamen Platte und Rt die mechanische Zugfestigkeit der biegsamen Platte bezeichnet, die folgenden Bedingungen gelten:
    Rπna >   5000 N
    a - d >   70 mm
    d - a >   100 mm
  4. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die biegsame Platte (21) eine Reißfestigkeit Rd aufweist, die größer oder gleich 200 N ist, und daß der Durchmesser d des ersten (3; 11) oder des zweiten (6; 14) Organs in der Nähe der Außenfläche der Isoliermaterialschicht (10) mindestens 6 mm beträgt.
  5. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Grundplatte (1) im wesentlichen kreisförmig ist und in ihrem Mittelteil eine Aufnahme (4; 13) aufweist, die zur Aufnahme des Kopkes (5; 12) des ersten Organs vorgesehen ist, wobei die Grundplatte auf das Tragerelement (2) aufgeklebt ist.
  6. Abdeckung nach Anspruch 5, dadurch gekennzeichnet, daß der Durchmesser der Grundplatte und die Klebegüte derart gewählt sind, daß eine Widerstandsfähigkeit gegen ein Losreißen der Grundplatte von dem Trägerelement erzielt wird, die größer als 5000 N ist.
  7. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das erste Organ einen hohlen Körper (3) aufweist, und daß das zweite Organ eine durch eine starre Scheibe (8) vervollständigte Schraube (6) ist.
  8. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das erste Organ eine Stange (11) aufweist und das zweite Organ ein Stopfen (14) mit einem hohlen länglichen Teil und einem starren flachen Kopf (15) ist.
  9. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das zweite Organ (6; 14) an dem ersten Organ (3; 11) durch Verschrauben, Klemmen oder Bajonettbefestigung befestigt ist.
  10. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das erste Organ eine Schraube (32) ist, auf der ein hohlzylindrisches Zwischenstück (34) befestigt ist, wobei das zweite Organ eine Schraube (35) ist, die unter Zwischenfügung einer starren Scheibe (30) in das Zwischenstück eingeschraubt ist.
  11. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die biegsame Platte (51) zwischen zwei starren Scheiben (52, 53) eingesetzt ist.
  12. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Isoliermaterialschicht (10) aus Mineralwollemiteiner Dichte unter 120 kg/m³ oder Glaswolle mit einer Dichte unter 90 kg/mm³ besteht.
  13. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß im Falle eines Trägerelementes (2) aus Stahl dieser galvanisiert und/oder vorlackiert ist.
EP91400366A 1990-02-14 1991-02-13 Wasserdichteindeckung mit einem Tragteil, einer Dämmschicht und einem Dichtungsbelag Expired - Lifetime EP0442810B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91400366T ATE99372T1 (de) 1990-02-14 1991-02-13 Wasserdichteindeckung mit einem tragteil, einer daemmschicht und einem dichtungsbelag.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9001756 1990-02-14
FR9001756A FR2658224A1 (fr) 1990-02-14 1990-02-14 Couverture etanche comportant un element porteur, une couche isolante et un revetement d'etancheite.

Publications (2)

Publication Number Publication Date
EP0442810A1 EP0442810A1 (de) 1991-08-21
EP0442810B1 true EP0442810B1 (de) 1993-12-29

Family

ID=9393710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400366A Expired - Lifetime EP0442810B1 (de) 1990-02-14 1991-02-13 Wasserdichteindeckung mit einem Tragteil, einer Dämmschicht und einem Dichtungsbelag

Country Status (5)

Country Link
EP (1) EP0442810B1 (de)
AT (1) ATE99372T1 (de)
DE (1) DE69100852T2 (de)
ES (1) ES2049528T3 (de)
FR (1) FR2658224A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2691761A1 (fr) * 1992-06-01 1993-12-03 Siplast Sa Dispositif de fixation d'un revêtement étanche sur un élément porteur métallique nervuré, notamment pour toiture ou analogue.
FR2697556B1 (fr) * 1992-11-03 1994-12-23 Siplast Sa Dispositif de fixation pour toiture ou analogue.
BE1011842A3 (fr) * 1998-03-18 2000-02-01 Prelasti S A Procede de fixation non perforant de membranes etanches a une structure sous-jacente, elements de fixation et outillage utilise pour la mise en oeuvre du procede.
EP1984170B1 (de) * 2006-02-14 2014-03-12 Physical Systems Inc. Haftbefestigungsanordnung für einen isoliermantel
US8950129B2 (en) * 2012-01-17 2015-02-10 II Stephen J. Motosko Shutter panel assembly

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2822764A (en) * 1954-01-26 1958-02-11 George D Widman Fastening unit for insulating roofs
FR2214803A1 (de) * 1973-01-18 1974-08-19 Amadeuf Claude
FR2223532A1 (en) * 1973-03-30 1974-10-25 Charpentier Roger Magnetic securing device for roof covering - has insulation and covering sheet between metal plates attracted by magnet
FR2283276A1 (fr) * 1974-08-28 1976-03-26 Chalumel Ste Expl Entreprise Procede et dispositif pour fixer mecaniquement des materiaux isolants sur des supports metalliques
US4003175A (en) * 1975-06-30 1977-01-18 Johns-Manville Corporation Fastener and roof arrangement using the fastener
US4852323A (en) * 1988-05-31 1989-08-01 The Firestone Tire & Rubber Company Nonpenetrating roof membrane fastening system

Also Published As

Publication number Publication date
FR2658224A1 (fr) 1991-08-16
ES2049528T3 (es) 1994-04-16
EP0442810A1 (de) 1991-08-21
DE69100852T2 (de) 1994-06-01
DE69100852D1 (de) 1994-02-10
ATE99372T1 (de) 1994-01-15

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