EP4069915B1 - Hochleistungsmetallabdeckung für dächer von gebäuden - Google Patents

Hochleistungsmetallabdeckung für dächer von gebäuden Download PDF

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Publication number
EP4069915B1
EP4069915B1 EP20796945.2A EP20796945A EP4069915B1 EP 4069915 B1 EP4069915 B1 EP 4069915B1 EP 20796945 A EP20796945 A EP 20796945A EP 4069915 B1 EP4069915 B1 EP 4069915B1
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EP
European Patent Office
Prior art keywords
slab
bends
slabs
profiled
recesses
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EP20796945.2A
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English (en)
French (fr)
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EP4069915A1 (de
Inventor
Mauro Menegoli
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Individual
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    • 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
    • E04D3/3607—Connecting; Fastening the fastening means comprising spacer means adapted to the shape of the profiled roof covering
    • 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
    • E04D3/24—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like
    • E04D3/30—Roof covering by making use of flat or curved slabs or stiff sheets with special cross-section, e.g. with corrugations on both sides, with ribs, flanges, or the like of metal
    • 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
    • E04D3/361—Connecting; Fastening by specially-profiled marginal portions of the slabs or sheets
    • E04D3/362—Connecting; Fastening by specially-profiled marginal portions of the slabs or sheets by locking the edge of one slab or sheet within the profiled marginal portion of the adjacent slab or sheet, e.g. using separate connecting elements
    • 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
    • E04D3/361—Connecting; Fastening by specially-profiled marginal portions of the slabs or sheets
    • E04D3/363—Connecting; Fastening by specially-profiled marginal portions of the slabs or sheets with snap action
    • 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
    • E04D3/361—Connecting; Fastening by specially-profiled marginal portions of the slabs or sheets
    • E04D2003/3612—Separate fastening elements fixed to the roof structure and comprising plastic parts for avoiding thermal bridges

Definitions

  • the present invention relates to a high-performance metal covering for roofs of buildings.
  • a covering for roofs of buildings which utilises a plurality of metal slabs adjacent to one another and connected by the special profiling of the lateral edges thereof.
  • edges are fixed on the underlying structure with the use of brackets and the system made in this way forms a continuous covering that is easy and rapid to install, long-lasting, very resistant to wind and adequate for the protection of the underlying building.
  • the present invention is advantageously applied in the sector of coverings for roofs of buildings in general and panel or slab coverings, in particular with a metal structure.
  • roofs with large-surface elements being panels or slabs
  • large surfaces such as industrial sheds, or production facilities, or large infrastructures, because of the greater implementation velocity and low cost thereof.
  • the panels and slabs for coverings of buildings are prefabricated elements having large surfaces and supplied directly to the worksite, ready to mount and equipped with all the components and accessories for realising the complete covering.
  • the panels and slabs are made of various metals, aluminium, copper, zinc, steel or the like, or of plastic materials, ABS, Polycarbonate, PVC, or the like.
  • the slabs that make them up can have various dimensions, both in length (from less than one metre up to hundreds of metres) and in width, which is usually not greater than a metre. Further, the slabs can have various dimensions, both for static reasons and for the limitation in width of the laminated coil that they originate from.
  • the lateral edges of the covering panels or slabs can be connected to enable conjoining thereof in very many ways, from a simple superposing of the edges to very complex geometries with drainage channels in the joint, up to fixing surfaces to the sub-structure, utilising geometries suitable to special fixing systems.
  • the fixing brackets can be made of metal or plastic materials, can avoid the need for piercing of the slabs, and can allow for dilation of the slabs in the lengthwise direction.
  • the choice of geometry of the slab and the metal in production determines the frequency of the fixings in the lengthwise direction and the mechanical performance at concentrated positive load, for example so as to support foot traffic, at distributed load, such as snow and wind, and at negative load, as in the typical cases of wind-uplift, i.e. the lifting thrust of the wind.
  • gripping and hooking components are included, which gripping and hooking components are applicable on the conjoined edges of two adjacent panels/slabs, which are fixable by use of a tightening and constraint component which, in this case, has the characteristic of including at least one part being adapted to enable constraint of an accessory, represented for example by solar panels or other components and accessories located on the covering.
  • CN 110 241 981 discloses another example of a metal covering.
  • the present invention intends to make available a metal covering for roofs of buildings, which utilises a plurality of metal slabs adjacent to one another and connected by the special profiling of the lateral edges thereof.
  • the invention proposes to make available a covering which is able to improve the general performance of the system so as to satisfy the demands of the market as described in the foregoing.
  • the invention provides a metal covering for roofs of buildings according to claim 1, the slabs thereof, located adjacent to one another, comprise edges which are fixed on the underlying structure with the use of specially profiled brackets and the system made in this way forms a continuous covering that is easy and rapid to install, long-lasting, very resistant to wind and perfectly adequate for the protection of the underlying building.
  • the present invention further aims to significantly improve the performance of the covering system in place, enabling an increase in terms of distance, or span, between successive rests in the lengthwise direction of the slabs, and/or a greater resistance to the wind-uplift phenomenon, i.e. the resistance to the lifting thrust of the wind.
  • a further object of the present invention is to improve the sliding of the slabs into the respective fixing brackets in order to enable free longitudinal dilation of the slabs themselves, enabling the manufacturing of even very long slabs (well above 100 metres), without compromising the limits of resistance to wind-uplift, as instead happens with systems presently in existence.
  • a further object of the invention is to reduce to a minimum the number of bends of the profile of the edges of the panels/slabs to be placed against one another, in the interest of greater production cost effectiveness.
  • a further object is to realise the bends of the profile of the edges of the panels/slabs to be placed against one another with a curvature radius that is sufficiently wide, so as to enable the use of hard metal alloys, for example aluminium alloys, on the one hand avoiding the risk of formation of cracks, which can lead to the breakage of the material, and on the other hand preventing decolouration or whitening of the surface (phenomena which occur, for example, when using PVDF paints).
  • a further object of the invention is to facilitate the mounting of external clamps, without any need to pierce the slabs, but guaranteeing great resistance thereof to the lateral, longitudinal and extraction stresses, without however increasing friction between the slabs and the fixing brackets.
  • 10 denotes in its entirety one of the slabs according to the invention which are used for covering a roof with a metal frame, while 10' and 10" denote the adjacent slabs.
  • Each slab 10 has a substantially rectangular conformation, indicatively a width of about 0.5 metres and a length that can also be much above 100 metres. Given the specific conformation thereof, as will be more fully explained in the following, the slab can be made of hard metal alloys, for example aluminium alloy.
  • the slabs 10 are destined to be mutually conjoined to form the whole covering and for this purpose each pair of consecutive slabs coupled to one another form a longitudinal joint 11.
  • the connecting element of such longitudinal joint 11 is constituted by the geometry of the edges of the slabs, which are mutually retained, both by the co-penetration thereof, and by the fixing brackets 12 which join to one another two consecutive slabs and guarantee fixing of the slabs to the underlying structure, not illustrated.
  • the fixing brackets 12 are arranged as a function of the design, and in a normal situation, but not every situation, they would be aligned in both a transversal direction, being arranged at regular intervals inferiorly of each longitudinal joint 11 (i.e. at a distance that corresponds to the width of the slab) and in a longitudinal direction, at a distance coinciding with the rests of the underlying structure, not illustrated herein, on which they are fixed.
  • the longitudinal joint 11 further guarantees the seal of the roof against penetration of water and air.
  • the described system comprises a plurality of longitudinal joints 11 fixed on the underlying structure, on which the coupled slabs are hooked, forms a single continuous surface which constitutes the covering in its entirety.
  • the fixing brackets 12 comprise a body typically made with a plastic material, or a metal material, or a group of these materials, or other materials, said body having a conformation generally defined by a flat base surface 13 which rests on the sub-structure of the roof.
  • the fixing bracket 12 comprises two holes 14 which constitute the housing of the fixing elements to the sub-structure, typically screws, or other suitable elements.
  • the fixing bracket 12 has a central axis of frontal symmetry and has a shape that allows fixing of two consecutive slabs 10.
  • the shape of the fixing bracket 12 defines two opposite recesses 15 and 16, formed respectively by two portions 15' and 16' projecting upwards and inclined in a mutually specular direction towards the common median plane.
  • the two recesses 15 and 16 are further specularly inclined, with respect to the common median plane, with the closest part to the central axis being lower and the distal part being higher. This inclination, as more fully described in the following, determines the best performance in relation to wind-uplift, i.e. the lifting thrust of the wind, with respect to the existing systems.
  • each single slab has two opposite profiled edges 17, 18 which are only partially symmetrical to one another, from a first bend, proximal with respect to the central axis of the slab, up to a sixth bend.
  • Bends 18a, 19a, 20a, and 21a of the profiled edge 17 and corresponding bends 18b, 19b, 20b and 21b of the profiled edge 18, are symmetrical to one another and coincide with the geometry of the fixing bracket 12.
  • the pathway corresponding to the bends 21 of the slab, is housed in the recesses 15 and 16 of the fixing bracket 12.
  • profiled edges 17, 18 comprise at least one curvature at the bends 21 located lower than the longitudinal axis of the joint 11 and higher than the central axis of the slab, so that said curvature is overall inclined.
  • Said fixing bracket 12 is adapted to conjoin the profiled edges 17, 18.
  • the recesses 15, 16 are symmetrical to one another, respectively defined by two portions 15', 16', in which recesses said curvature formed by the bends 21 located respectively on the profiled edges 17, 18 of the slab is housed.
  • the recesses 15, 16 have a shape that extends downwards towards the proximal portion with respect to the centre of the bracket, and upwards towards the distal portion with respect to the centre of the bracket, so that the recesses 15, 16 are inclined like said curvature.
  • bends 22a and 22b respectively of the profiled edges 17 and 18 of the slab, return the extension of the slab into a substantially vertical direction with an upwards direction.
  • bends 23a and 23b are also substantially symmetrical. These last two bends 23a and 23b bring two contiguous slabs to be substantially adherent to one another at a portion 24 (visible in figure 8 ) located at the longitudinal joint 11.
  • An external fixing system can be mounted at this portion 24 for mounting accessories, such as snow catches, anti-fall systems, solar panels, or others besides.
  • This clamp when tightened, does not deform the slabs and does not block them in the fixing bracket, enabling free longitudinal dilation, even in the case of slabs of significant length.
  • the slab 10 at the profiled edge 17, proceeds upwards and forms a curve of about 180° at a bend 25 which, when the slab is engaged to form the longitudinal joint 11, covers the profiled edge 18 of the adjacent slab.
  • the profiled edge 17 of the slab 10 has, at the end thereof, a bend 26 that, when the slab is engaged to form the longitudinal joint 11, comes to adhere to the bend 23b of the adjacent slab.
  • the coupling between the bends 23a and 23b exploits the elasticity of the construction material of the slabs and represents an element with an excellent seal against water, as the external surface exposed to a pressure determined by the level of the water which rises, pushes the profiled edge 17 and the last bend 26 against the bend 23b with an intrinsically advantageous cohesion mechanism: the greater the pressure the greater the seal.
  • the bends 26, 27 form a geometry which determines the formation of a channel 28, dedicated to collecting the residual water that might have penetrated into the coupling between the bends 26 and 23b.
  • This channel 28 advantageously transfers the water towards a final part of the slab.
  • the inclination of the pathways formed by the bends 21 of the slabs which are housed in the recesses 15 and 16 of the fixing bracket 12 determines the fact that an upwards thrust caused by wind, which acts both on the flat surface in the centre of the slab 10, and on the longitudinal joint 11 formed by the coupling of the two profiled edges 17 and 18 of two contiguous slabs, unloads in a component having an opposite direction with respect to the lifting thrust, i.e. downwards, due to the conformation of the fixing brackets 12 adapted to retain the longitudinal joints 11 with maximum effectiveness.
  • the seal limit for wind-uplift, or lifting thrust of the wind, of the system of the present invention is uniquely determined by the resistance of the fixing bracket 12 which, if built for example of metal, is extremely high, and by the resistance of the material used for the slabs.
  • the solution according to the present invention determines an interference stress between the slab 10 and the fixing bracket 12 only in the moment of mechanical stress, for example during a meteorological event with very strong winds. This leaves total freedom between slabs 10 and fixing brackets 12 in normal conditions and significantly improves the longitudinal sliding necessary for free heat dilation of the slabs, even in the case of very long slabs.
  • each slab is represented provided with profiled edges 17, 18, but there remains the possibility of using two types of slabs: a first type in which each slab is totally symmetrical with profiled edges 17 on both sides and a second type in which each slab is totally symmetrical with profiled edges 18 on both sides. According to this constructional variant, the slabs are thus mounted in alternated fashion.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)

Claims (10)

  1. Abdeckung mit einer Metallstruktur für Dächer von Gebäuden, umfassend mehrere Platten (10), die eine im Wesentlichen vierseitige Form aufweisen, von denen jede mit profilierten Kanten (17, 18) versehen ist, die parallel und einander gegenüberliegend sind, um benachbarte Platten (10) in der Längsrichtung gegenseitig zu verbinden und eine Verbindung (11) zu bilden, die sich zwischen jeder der benachbarten Platten (10) befindet, wobei die profilierten Kanten (17, 18) mindestens teilweise symmetrische Biegungen (18, 19, 20, 21, 22, 23) und weitere Biegungen (25, 26) umfassen, die an mindestens einer der profilierten Kanten (17) ausgebildet sind, wobei die mindestens teilweise symmetrische Biegungen (21a, 21b) mindestens eine Krümmung bilden, die tiefer als die Längsachse der Verbindung (11) und höher als die Mittelachse der Platte derart liegt, dass die mindestens eine Krümmung Teil einer Sektion der profilierten Kanten ist, die insgesamt geneigt ist, wobei die Abdeckung ferner einen Befestigungsbügel (12) umfasst, der geeignet ist, die profilierten Kanten (17, 18) zu verbinden, wobei der Befestigungsbügel (12) mindestens zueinander symmetrische Ausnehmungen (15, 16) aufweist, die jeweils durch zwei Abschnitte (15', 16') definiert sind, die nach oben ragen und in zueinander spiegelbildlicher Richtung zur gemeinsamen Mittelebene hin geneigt sind, wobei sich in den Ausnehmungen (15, 16) die mindestens eine Krümmung der profilierten Kanten (17, 18) der Platte befindet, wobei die Ausnehmungen (15, 16) des Befestigungsbügels (12) eine Form aufweisen, die sich nach unten in Richtung des proximalen Abschnitts in Bezug auf die Mitte des Bügels und nach oben in Richtung des distalen Abschnitts in Bezug auf die Mitte des Bügels derart erstreckt, dass die Ausnehmungen (15, 16) in gleicher Weise wie die geneigte Sektion geneigt sind, die die mindestens eine Krümmung umfasst.
  2. Abdeckung für Dächer von Gebäuden nach Anspruch 1, dadurch gekennzeichnet, dass der Befestigungsbügel (12) einen Körper mit einer Gestalt umfasst, die durch eine flache Grundfläche (13) definiert ist, die konfiguriert ist, um auf einer Unterkonstruktion eines Daches zu ruhen, wobei der Befestigungsbügel (12) Durchgangslöcher (14) aufweist, die geeignet sind, Befestigungselemente aufzunehmen, wobei der Befestigungsbügel (12) ferner eine mittlere Symmetrieebene und eine Form aufweist, die das Befestigen von zwei aufeinanderfolgenden Platten (10) mittels Biegungen (21a, 21b) davon ermöglicht, die jeweils in die Ausnehmungen (15, 16) eindringen.
  3. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Ausnehmungen (15, 16) in Bezug auf die gemeinsame Mittelebene spiegelbildlich geneigt sind, wobei der der Mittelachse am nächsten liegende Teil niedriger und der distale Teil höher ist, wobei diese Neigung das Halten der Platten gegen einen Hebeschub bestimmt.
  4. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass jede Platte (10) von einer ersten Biegung (18a, 18b), proximal zur Mittelachse der Platte, bis zu einer sechsten Biegung (23a, 23b) zwei gegenüberliegende profilierte Kanten (17, 18) aufweist, die teilweise symmetrisch zueinander sind.
  5. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie Biegungen (18a, 19a, 20a und 21a) umfasst, die an einer profilierten Kante (17) angeordnet sind, und entsprechende Biegungen (18b, 19b, 20b und 21b), die an einer weiteren profilierten Kante (18) angeordnet sind, wobei die Biegungen zueinander symmetrisch und spiegelbildlich sind und mit der Geometrie des Befestigungsbügels (12) übereinstimmen und dass die Krümmung der Platte in den Ausnehmungen (15, 16) des Befestigungsbügels (12) untergebracht ist.
  6. Abdeckung nach Anspruch 5, dadurch gekennzeichnet, dass sie symmetrische Biegungen (22a, 22b) umfasst, die jeweils an den profilierten Kanten (17, 18) der Platte angeordnet sind, um eine im Wesentlichen vertikale Ausdehnung mit einer Aufwärtsrichtung zu bestimmen.
  7. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass sie symmetrische Biegungen (23a, 23b) umfasst, die jeweils an den profilierten Kanten (17, 18) der Platte angeordnet sind, wobei die Biegungen zwei angrenzende Platten dazu bringen, dass sie an einem Abschnitt (24), der sich an der Verbindung (11) befindet, im Wesentlichen aneinander anliegend sind.
  8. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Platte (10) ausgehend von den Biegungen (23) nach oben verläuft und eine Kurve von etwa 180° an einer weiteren Biegung (25) bildet, die, wenn die Platte mit einer benachbarten Platte in Eingriff ist, um die Verbindung (11) zu bilden, eine profilierte Kante (18) der benachbarten Platte bedeckt.
  9. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass an einem Ende davon eine profilierte Kante (17) der Platte (10) eine Biegung (26) aufweist, die, wenn die Kante mit der Verbindung (11) in Eingriff ist, mit einer Biegung (23b) der benachbarten Platte zum Anliegen gelangt.
  10. Abdeckung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine profilierte Kante (18) mehrere der letzten Biegungen mit einer Gestaltung aufweist, die derart ist, dass, wenn die profilierte Kante (18) mit der Verbindung (11) in Eingriff ist, ein Kanal (28) definiert wird, wobei der Kanal (28) geeignet ist, Wasser zu sammeln, das in die Kupplung dieser Biegungen eingedrungen sein könnte.
EP20796945.2A 2019-12-05 2020-10-21 Hochleistungsmetallabdeckung für dächer von gebäuden Active EP4069915B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102019000023133A IT201900023133A1 (it) 2019-12-05 2019-12-05 “copertura metallica di rivestimento ad elevate prestazioni per tetti di edifici”
PCT/IB2020/059883 WO2021111206A1 (en) 2019-12-05 2020-10-21 A high-performance metal covering for roofs of buildings

Publications (2)

Publication Number Publication Date
EP4069915A1 EP4069915A1 (de) 2022-10-12
EP4069915B1 true EP4069915B1 (de) 2023-12-06

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EP (1) EP4069915B1 (de)
IT (1) IT201900023133A1 (de)
PL (1) PL4069915T3 (de)
WO (1) WO2021111206A1 (de)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT245370Y1 (it) 1998-06-12 2002-03-20 Iscom S R L Ora Iscom Spa Struttura di copertura piana in lamiera sagomata
CN110241981B (zh) * 2018-03-07 2021-05-11 霍高文建筑系统（广州）有限公司 金属屋面系统构建方法及其构件

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EP4069915A1 (de) 2022-10-12
IT201900023133A1 (it) 2021-06-05
WO2021111206A1 (en) 2021-06-10
PL4069915T3 (pl) 2024-04-22

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