EP3835507B1 - Auxiliary rafters, skylight assembly and roof assembly - Google Patents

Description

The invention relates to an auxiliary rafter for arrangement between a first skylight and a second skylight of a skylight assembly. Furthermore, the invention relates to a skylight arrangement with a first skylight, a second skylight and an auxiliary rafter and a roof arrangement.

From the prior art, for example, the publication DE 80 00 999 U1 known. This describes a scaffolding that can be built into a roof opening to accommodate skylights or the like. It is provided that the framework has square tubes and connecting shoes which at least partially comprise a cavity for receiving one end of a square tube and can be connected to another square tube or to a boundary of the roof opening.

Furthermore, the document describes EP 1 581 706 B1 a side trim panel for use with a roof penetrating structure installed in a sloping roof surface, the trim panel having a substantially U-shaped cross section to allow water to be drained along the side of the roof penetrating structure, wherein an arm of the U is intended to engage the roof penetrating structure and the base of the U is intended to be substantially flush with the roof in the assembled condition.

In addition, the pamphlet shows EP 2 500 486 B1 a roof window consisting of a generally rectangular window frame containing four longitudinal members of the window frame, at least one window frame member having at least one mounting hole running along the outer surface of the member near its end, a window sash mounted on the window frame, and at least one bracket for attaching the window frame to the roof structure Has.

Other skylight assemblies are off DE 935 089 C , GB 861 677 A , and NO 156 951 B known.

It is an object of the invention to propose an auxiliary rafter for arrangement between a first skylight and a second skylight of a window arrangement which is opposite known auxiliary rafters has advantages, in particular it can be installed in an optically inconspicuous manner and at the same time does not impair the weather resistance of the roof window arrangement.

According to the invention, this is achieved with an auxiliary rafter having the features of claim 1 . In this case, a cranked rafter element is provided, which has a supporting element for supporting the two skylights, with two fastening elements for fastening the auxiliary rafter to a roof structure of a roof, which are arranged offset to the supporting element with respect to a longitudinal central axis of the supporting element, adjoining the supporting element on opposite sides of the supporting element. and wherein an intermediate window element for spacing the two skylights on the rafter element is arranged on a side of the longitudinal center plane facing away from the fastening elements.

The auxiliary rafter serves to support two skylights arranged directly next to one another, namely the first skylight and the second skylight, on or in relation to a roof. The auxiliary rafter, together with the two skylights, forms the skylight assembly that is placed on the roof. The roof and skylight assembly are in turn part of the roof assembly. The roof is located between an exterior environment and an interior space of a building, in particular a residential building or house, and separates them from one another.

The roof essentially consists of the roof construction and the roof skin. The roof structure has, for example, one or more rafters and one or more battens. The roof battens can be divided into counter battens and support battens, with the presence of counter battens being purely optional. The battens are usually arranged perpendicular to the rafters and attached to them. The counter battens, on the other hand, preferably run parallel to the rafters.

The roof skin is arranged or fastened on the outside of the roof structure, thus delimiting the roof structure in the direction of the outside environment. The roof skin is to be understood in particular as a roof covering or a roof seal. The roof covering has, for example, a large number of tiles, roof tiles, shingles or the like. On the inside, ie in the direction of the interior, the roof construction is preferably delimited by an inner wall. For this purpose, the inner wall is arranged and/or fastened to the roof structure on its side facing the interior.

The roof has, for example, several water-carrying levels, namely a first water-carrying level that is formed by the roof skin and/or a second water-carrying level that is defined, for example, by an underlay membrane present between the rafters and the battens. The underlay is in particular a film which rests against the rafters on the side of the rafters facing the battens and/or is fastened to the rafters. In addition or as an alternative, the second water-carrying level or another water-carrying level can be produced by means of over-rafter insulation or formwork with or without an additional underlay membrane. The water-bearing levels ensure reliable drainage of water in the form of precipitation or rain that hits the roof from the outside environment.

The auxiliary rafter is placed in or on the roof before or during assembly of the skylight. In addition to the first skylight and the second skylight, the auxiliary rafter is part of the skylight arrangement, which is ultimately installed on or in the roof and forms the roof arrangement with it. When installed in the roof, the auxiliary rafter is attached to the roof structure, for example to a rafter of the roof structure or to a change connecting several rafters of the roof structure. After assembly of the two skylights and the auxiliary rafter, the first skylight and the second skylight are positioned on opposite sides of the auxiliary rafter and abut and/or rest on or against it. In this respect, the auxiliary rafter has a supporting function for the two skylights. In other words, both skylights are connected or fastened to the roof structure via the auxiliary rafters.

In order to ensure sufficient load-bearing capacity of the auxiliary rafter, it must have certain dimensions. In known configurations of the auxiliary rafter, this has the consequence that the auxiliary rafter either protrudes beyond one of the water-carrying planes of the roof in the direction of the outside environment or protrudes comparatively far into the interior of the building, which is separated from the outside environment by the roof. The former can under certain circumstances impair the weather resistance of the roof, whereas the latter is visually disadvantageous.

For this reason, according to the invention, the auxiliary rafter should have a shape that allows the auxiliary rafter to be arranged in such a way that it does not pass through the water-carrying level of the roof, in particular the second water-carrying level, or only over part of its length and also hardly encroaches on the interior. The reaching through over part of the length preferably takes place over at most 75%, at most 50% or at most 25% of a longitudinal extension of the auxiliary rafter. The auxiliary rafter has the cranked rafter element. This has the support element and the two fastening elements. The supporting element serves to support the two skylights. For this purpose, the support element preferably has a corresponding support surface for the two skylights. The fastening elements, on the other hand, serve to connect the auxiliary rafter to the roof or to the roof structure of the roof. The fastening elements are arranged on opposite sides of the support element. In particular, they adjoin the support element at opposite ends of the support element, in particular directly. In other words, viewed in the longitudinal direction of the support element, the fastening elements are arranged on opposite sides of the support element. The longitudinal extent is to be understood as meaning that direction in which the respective element, here for example the support element, has the greatest extent.

The fastening elements are arranged offset with respect to the support element or with respect to the longitudinal center plane of the support element. The longitudinal center plane is to be understood as an imaginary plane which runs centrally through the support element and in this way accommodates the longitudinal direction or a longitudinal axis of the support element. The fastening elements are preferably aligned with one another. This means that although the fastening elements are arranged at a distance from one another in the longitudinal direction of the support element, they are in an extension of one another. For example, longitudinal center axes of the fastening elements coincide, in particular if the fastening elements are configured identically, at least when viewed in cross section, which is preferably the case.

The fastening elements can of course have different extensions in the longitudinal direction. However, it can also be provided that the extensions of the fastening elements are identical in the longitudinal direction. Due to the offset arrangement of the fastening elements to the support element, the offset of the rafter element is formed. More specifically, the rafter member is cranked multiple times because each of the fasteners is offset from the support member. It should be noted here that the fastening elements are arranged on the same side of the support element. In this respect, the two fastening elements are arranged on the same side of the longitudinal center plane of the support element and not, for example, on opposite sides. When assembling the auxiliary rafter, it is intended to fasten each of the fastening elements to the roof structure of the roof, for example to a rafter or a change in each case.

In addition to the cranked rafter element, the auxiliary rafter has the intermediate window element, which serves, among other things, to support the skylight and/or to space the two skylights apart at the sides. The intermediate window element is arranged on the rafter element, namely on its side facing away from the fastening elements. In particular, therefore, the rafter element is on the side of the longitudinal center plane of the support element that faces away from the fastening elements. After the assembly of the skylight arrangement, the intermediate window element is arranged between the two skylights, in particular the two skylights lie on opposite sides of the intermediate window element. This enables a secure hold of the skylight. The intermediate window element has, for example, a smaller width than the rafter element, in particular than the support element. In other words, a material thickness of the intermediate window element is less than a material thickness of the rafter element, so that side surfaces of the intermediate window element and side surfaces of the rafter element are aligned with one another. However, it can also be provided that the intermediate window element is narrower, so that the side surfaces of the intermediate window element are spaced apart from the side surfaces of the rafter element, in particular the support element, in particular lie between them.

With the described configuration of the auxiliary rafter, the goals mentioned above are achieved, namely to provide an auxiliary rafter which is optically advantageous on the one hand and also ensures high weather resistance. Of course, the roof window arrangement can have more than two roof windows which are arranged directly adjacent to one another. In this case, an auxiliary rafter of the type described is arranged between every two of the skylights. For example, the skylight arrangement can have at least two, at least three, at least four or at least five skylights. The configuration of the auxiliary rafter described allows roof windows to be lined up in almost any way without having to accept disadvantages in terms of weather resistance, the appearance or the load-bearing capacity of the roof construction, as has been the case up to now.

A development of the invention provides that the rafter element and the intermediate window element are manufactured integrally, in particular from a wood material, for example laminated veneer lumber. The auxiliary rafter is therefore made entirely of one continuous material, in particular by milling or the like. In other words, the rafter element, consisting of the support element and the fastening elements, and the intermediate window element are configured in one piece and/or of the same material. Matters in everyone Case that the auxiliary rafter, in particular consisting of the rafter element and the intermediate rafter element or the support element, the fastening elements and the intermediate rafter element, is made of a single piece of material and is not composed of several pieces of material. The auxiliary rafter preferably consists of the wood material, in particular of laminated veneer lumber. Laminated veneer lumber, for example, is used as the laminated veneer lumber. This is characterized by the crosswise gluing of layers of wood or veneers arranged one on top of the other. The veneers of the laminated wood are thus glued together crosswise, with at least 10%, at least 20% or at least 30% and/or at most 80%, at most 70% or at most 60% of the wood layers or veneers having the grain direction transverse to the longitudinal axis of the auxiliary rafter. The integrally manufactured auxiliary rafter has a high level of strength, which also allows for small dimensions.

A development of the invention provides that at least one bearing surface for at least one of the skylights is formed on the support element, which has a greater extent in a longitudinal direction of the support element than the intermediate window element. The contact surface is preferably flat throughout, that is to say it lies continuously in an imaginary plane. The bearing surface serves to support the at least one skylight, but preferably both skylights. After the installation of the skylight arrangement, at least one of the skylights rests against the support surface. A plurality of bearing surfaces are preferably formed on the support element, with each of the bearing surfaces serving to support one of the skylights. In that regard, a first bearing surface for the first skylight and a second bearing surface for the second skylight are realized on the support element. The two bearing surfaces are particularly preferably also on opposite sides of the intermediate window element on the support element.

The bearing surface should be larger than the intermediate window element in the longitudinal direction of the support element, ie project beyond the intermediate window element at least on one side, but particularly preferably on both sides in the longitudinal direction. In this way, for example, the first bearing surface and the second bearing surface merge into one another at the end of the intermediate window element, in particular on both sides of the intermediate window element. The protruding bearing surfaces are intended and designed in particular to accommodate supporting elements running transversely to the auxiliary rafter, for example roof battens, and thus indirectly to ensure the load transfer of the skylight. The two bearing surfaces are preferably each flat and also lie in a common imaginary plane. After assembly of the skylight arrangement, a counter-bearing surface of the at least one skylight preferably lies flat on the bearing surface. The counter-bearing surface is preferably provided on an insulating element or insulating block of the roof window. The configuration of the auxiliary rafter described enables the roof window or both roof windows to be supported in a particularly reliable manner.

A development of the invention provides that the fastening elements and the support element are connected to one another via at least one fitting element, with the fitting element preferably also forming the bearing surface of the support element. The fitting element can be used, for example, to reinforce the material of the integrally produced auxiliary rafter. Alternatively, however, it can also be provided that the fastening elements and the support element are produced separately from one another and are subsequently connected to one another by means of the at least one fitting element. For example, in this case the fastening elements and the support element are arranged at a distance from one another, in particular in the longitudinal direction. The fastening elements and the support element are particularly preferably connected to one another by means of a plurality of fitting elements which are arranged on opposite sides of said elements, namely preferably in a transverse direction which is perpendicular to the longitudinal direction.

The fastening elements of the rafter element are preferably connected to the support element via separate fitting elements. To this extent, these fitting elements are spaced apart from one another in the longitudinal direction and are connected to one another exclusively via the support element. This enables a cost-effective design of an auxiliary rafter that is nevertheless extremely stable. In any case, the fitting element can also form the bearing surface of the support element. This means that after the assembly of the skylight arrangement, at least one of the skylights or both skylights are supported on the fitting element. The multi-part design of the auxiliary rafter enables cost-effective production and also space-saving delivery.

A development of the invention provides that the bearing surface has two bearing surface areas spaced apart from one another, which are formed on the at least one fitting element. Both bearing surface areas serve to support exactly one of the skylights. For this purpose, the bearing surface areas are formed on the fitting element at a distance from one another in the longitudinal direction. If there are several fitting elements, the bearing surface areas of course also present on different fitting elements. Such a configuration also enables the realization of a cost-effective auxiliary rafter, which nonetheless has advantages over known configurations.

A further development of the invention provides that, viewed in longitudinal section, the rafter element has a recess located between the fastening elements to form the offset. The recess is present between the fastening elements and to this extent spaces them apart from one another in the longitudinal direction. For example, the recess has a depth, ie an extension perpendicular to the longitudinal center plane of the support element, which corresponds to an extension of the fastening elements in this direction. In other words, the support element is offset relative to the fastening elements by the extent of the fastening elements in this direction. However, it can of course also be provided that the support element is only offset by at least 50%, at least 60%, at least 70%, at least 80% or at least 90% of this extent in relation to the fastening elements. The recess is used in particular to create an excellent visual impression of the auxiliary rafter, which extends into the interior to a much lesser extent than in known configurations. The recess is present on the side of the auxiliary rafter which faces the interior and which faces away from the outside environment.

A development of the invention provides that, viewed in longitudinal section, the fastening elements each have an inclined surface on their mutually facing sides, with an imaginary inclined surface plane that completely accommodates the respective inclined surface being angled relative to the longitudinal center plane, so that the recess widens in the direction facing away from the support element . Preferably, the inclined surfaces each extend from a side of the respective fastening element facing away from the supporting element up to the supporting element. However, it can also be provided that the sloping surface is not designed to be continuous, but only extends over part of the extent mentioned. Preferably, however, the sloping surface extends from that side of the corresponding fastening element which is remote from the carrying element.

The respective sloping surface is completely absorbed by the corresponding sloping surface plane. This plane of the inclined surface is angled relative to the longitudinal center plane, thus enclosing an angle with it that is greater than 0° and less than 180°. The angle is preferably at least 15°, at least 20°, at least 25° or at least 30° and at most 75°, at most 70°, at most 65° or at most 60°. For example, an angle of at least 30° and at most 60°. The inclined surfaces are aligned in such a way that the recess widens in the direction facing away from the support element, ie in the direction of the interior. The inclined surface is designed and arranged in such a way that it enables the attachment of an inner lining to at least one of the skylights or both skylights. For example, the inclined surfaces allow the attachment of crash boards of the inner lining, at least in certain areas, vertically and/or horizontally. Additionally or alternatively, the crash surfaces allow the crash boards of the inner lining to be attached below and/or above. This creates an excellent visual impression of the skylight arrangement.

A development of the invention provides that the inclined surface is formed at least in regions on the at least one fitting element. It was already pointed out above that the fitting element connects the support element and the fastening elements to one another. Accordingly, it makes sense to also provide the at least one fitting element with the sloping surface in order to enable simple attachment of the inner lining also for the multi-part embodiment of the auxiliary rafter.

A development of the invention provides that the fastening elements and the support element are arranged on opposite sides with respect to an imaginary plane, in particular in each case completely. The imaginary plane is preferably spaced parallel to the longitudinal center plane of the support element. The fastening elements are at least mostly on a first side of this plane and the support element is at least mostly on a second side of this plane opposite the first side. Particularly preferably, the fastening elements lie entirely on the first side and the supporting element entirely on the second side, so that the imaginary plane represents a connecting plane in which the fastening elements and the supporting element meet. Such a configuration allows a particularly clear cranking of the rafter element and a correspondingly large recess, so that the advantages already mentioned in terms of optics are achieved.

The invention further relates to a skylight arrangement having the features of claim 10.

It is provided that the auxiliary rafter has a cranked rafter element, which has a support element for supporting the two skylights, with two fastening elements arranged offset to the support element with respect to a longitudinal center plane of the support element on opposite sides of the support element for fastening the auxiliary rafter to a roof construction of a roof, to the support element, and wherein an intermediate window element for spacing the two skylights is arranged on the rafter element on a side of the longitudinal center plane facing away from the fastening elements.

The advantages of such a configuration of the auxiliary rafter and the skylight arrangement have already been pointed out. Both the skylight arrangement and the auxiliary rafter can be further developed according to the explanations within the scope of this description, so that reference is made to them in this respect.

A further development of the invention provides that a longitudinal extent of the intermediate window element corresponds to at least one longitudinal extent of a side rail of one of the two skylights and a longitudinal extent of the support element is greater than the longitudinal extent of the side rail, so that the side rail is preferably supported over its entire longitudinal extent on a bearing surface of the support element . Preferably, what has been said applies not only to one of the skylights, but to both skylights. The length of the intermediate window member and the length of the side rail are both longitudinal. Since the longitudinal extent of the intermediate window element should correspond at least to the longitudinal extent of the side rail, reliable spacing of the two skylights from one another is ensured. In addition, the longitudinal extent of the support element is greater than the longitudinal extent of the side rail, so that there is particularly reliable support for the skylight, in particular by means of the support slats supported on the auxiliary rafter, in particular the support element. For example, the skylight or at least one of the skylights is attached to the support battens. The side rail of the skylight preferably rests over its entire length on the bearing surface of the support element or is at least supported on this, either directly or only indirectly, for example via an insulating element attached to the side rail. Additionally or alternatively, the roof window, in particular the side rail, is supported on the intermediate window element, preferably on its side facing away from the support element. This support takes place, for example, via at least one mounting bracket.

A further development of the invention provides that the longitudinal extension of the support element corresponds to at least one longitudinal extension of one of the skylights and that at least one cross member attached to the side rail is supported on the bearing surface of the support element. The support element should therefore not only serve to support the side rail, but also the Supporting the crossbeam. For this purpose, the support element has a corresponding longitudinal extension.

A further development of the invention provides that the first skylight and the second skylight are surrounded by an inner lining which has at least one first lintel board wall interrupted by the auxiliary rafter and a second lintel board wall which spans both skylights and is angled in relation to the first lintel board wall. The inner lining serves to connect the skylight to an inner wall delimiting the interior in the direction of the outside environment and the roof in the direction of the interior. For example, the inner lining has two crash boards which are connected to one another by two opposite side walls. The auxiliary rafters preferably pass through the two crash boards. For example, at least one of the crash boards consists of the first crash board wall and the second crash board wall. The first lintel board wall is interrupted by the auxiliary rafter, whereas the second lintel board wall continuously connects the two side walls with each other. The two crash board walls are angled towards each other, for example they enclose an angle of at least 15 and at most 75° with each other.

The invention further relates to a roof assembly having the features of claim 13.

It is provided that the auxiliary rafter has a cranked rafter element, which has a support element for supporting the two skylights, with two fastening elements arranged offset to the support element with respect to a longitudinal center plane of the support element on opposite sides of the support element for fastening the auxiliary rafter to a roof construction of a Attach the roof to the support element, and wherein an intermediate window element for spacing the two skylights is arranged on the rafter element on a side of the longitudinal center plane facing away from the fastening elements.

With regard to the advantages of such a configuration of the roof arrangement and possible advantageous developments, reference is again made to the explanations within the scope of this description.

A further development of the invention provides that the supporting element and the fastening elements are arranged on a side of an imaginary plane which faces away from the roof skin of the roof accommodates an upper side of a batten of the roof structure, on which the roof skin is supported. The battens comprise one or more battens of the roof structure. The imaginary plane runs through the upper side of the supporting batten or the individual supporting battens, ie it runs on its side facing the outside environment. For example, the imaginary plane defines the area of the roof structure closest to the outside environment. The roof skin, in particular the roof covering, is supported on the battens or the roof structure. The imaginary level describes, for example, the first water-bearing level already mentioned. The support element and the fastening elements are now arranged, in particular completely, on the side of the imaginary plane facing away from the outside environment or the roof skin. This means that the water-carrying plane defined by the imaginary plane is not penetrated by the support element and the fastening elements, so that a high degree of weather resistance of the roof arrangement is ensured. In addition, what has been said can also apply to the intermediate window element.

A development of the invention provides that the fastening elements are arranged on a side of an imaginary plane facing away from the roof skin, which accommodates an underside of the supporting battens and/or a counter batten and/or a formwork of the roof construction. The (further) imaginary plane now defines the underside of the supporting battens or the counter battens, i.e. the area of the supporting battens or the counter battens that is closest to the interior. Alternatively, the plane may be on an exterior side of the rafters of the roof structure. The imaginary level represents, for example, the second water-carrying level already mentioned. The fastening elements should now be arranged on the side of this imaginary level facing away from the roof skin or the outside environment, preferably completely. Here, too, the water-bearing level is not penetrated by the fastening elements, so that the high level of weather resistance is ensured. In addition, what has been said can apply to the support element and/or the intermediate window element.

Figur 1

eine schematische Darstellung einer Dachanordnung mit einer Dachfensteranordnung, welche drei Dachfenster sowie zwei Hilfssparren umfasst,

Figur 2

eine schematische Darstellung des Hilfssparrens in einer ersten Ausführungsform,

Figur 3

eine schematische Darstellung des Hilfssparrens ins einer zweiten Ausführungsform,

Figur 4

eine schematische Seitenschnittdarstellung durch die Dachanordnung sowie

Figur 5

eine schematische Querschnittsansicht durch die Dachanordnung.

The invention is explained in more detail below with reference to the exemplary embodiments illustrated in the drawing, without the invention being restricted. It shows:

figure 1

a schematic representation of a roof assembly with a skylight assembly, which includes three skylights and two auxiliary rafters,

figure 2

a schematic representation of the auxiliary rafters in a first embodiment,

figure 3

a schematic representation of the auxiliary rafters in a second embodiment,

figure 4

a schematic side sectional view through the roof assembly and

figure 5

a schematic cross-sectional view through the roof assembly.

the figure 1 shows a portion of a roof assembly 1 having a roof 2 and a skylight assembly 3 . The roof 2 has a roof structure 4 (not shown) which is delimited in the direction of an outside environment 5 by a roof skin 6 (not shown) and in the direction of an interior 7 by an inner wall 8 . The skylight arrangement 3 has a first skylight 9 and at least one second skylight 10, in the exemplary embodiment shown here several second skylights 10. Between the first skylight 9 and the second skylight 10, in particular between the first skylight 9 and each of the second skylights 10, an auxiliary rafter 11 is arranged in each case, which cannot be seen here because it is provided with a panel 12 . In other words, there is an auxiliary rafter 11 between each two adjacent skylights 9 and 10 .

The skylights 9 and 10 are preferably in the form of skylights. They are surrounded by a common inner lining 13 which connects them to the inner wall 8 . The inner lining 13 has crash boards 14 and 15 which are connected to one another via side walls 16 and 17 of the inner lining 13 . It can be seen that the crash board 14 has a first crash board wall 18 and a second crash board wall 19, which are each flat or at least essentially flat and preferably merge directly into one another, for example via a curve. In the exemplary embodiment shown here, the first lintel board wall 18 is interrupted by the cladding 12 , whereas the second lintel board wall 19 overlaps the roof windows 9 and 10 without interruption, i.e. extends uninterruptedly from the side wall 16 to the side wall 17 . For example, the cladding 12 stands perpendicularly on the first crash board wall 18. The second crash board wall 19 is preferably arranged vertically from a geodetic point of view. The lintel 15 also preferably runs geodetically horizontally, in particular continuously from the skylights 9 and 10 to the inner wall 8.

the figure 2 shows a schematic representation of the auxiliary rafter 11 in a first embodiment. The auxiliary rafter 11 has an offset rafter element 20, which in turn - to implement the offset - has a support element 21 and two fastening elements 22 has. The support element 21 and the fastening elements 22 are offset relative to one another with respect to a longitudinal center plane 23 of the support element 21 . In this case, the fastening elements 22 are preferably aligned with one another, that is to say they are in an imaginary extension of one another. Due to the offset between the support element 21 and the fastening elements 22, these jointly delimit a recess 24.

The recess 24 is delimited by the fastening elements 22 on opposite sides in the longitudinal direction of the rafter element 20 and by the supporting element 21 in the direction perpendicular to the longitudinal direction. As a result, the cranked design of the rafter element 20 is realized. The support element 21 serves to support the skylights 9 and 10. For this purpose, it has a bearing surface 25 which preferably runs parallel to the longitudinal center plane 23 and is continuously flat. The bearing surface 25 is on the opposite side of the longitudinal center plane 23 from the fastening elements 22 . Provision is preferably made for the bearing surface 25 to extend over the entire length of the support element 21 . The fastening elements 22 are used to fasten the auxiliary rafter 11 to the roof structure 4, for example to change the roof structure 4. For example, this fastening takes place by means of a joist shoe or the like.

An intermediate window element 26 of the auxiliary rafter 11 extends from the bearing surface 25 and is on the side of the support element 21 or the longitudinal center plane 23 opposite the fastening elements 22 . The intermediate window element 26 is used to space the skylights 9 and 10 in the lateral direction. After the roof arrangement 1 has been installed, the roof windows 9 and 10 , for example, are supported on opposite sides of the intermediate window element 26 and at the same time rest on the bearing surface 25 . Provision can also be made for one or more supporting battens to rest on the support surface 25, to which the skylights 9 and 10 are fastened. As a further alternative, it can be provided that the skylights are only supported on the intermediate window element 26 .

It can be seen that the recess 24 is delimited by inclined surfaces 27 and 28 of the fastening elements 22 . The inclined surfaces 27 and 28 each start directly from the corresponding fastening element 22 and extend in the direction of the supporting element 21, for example completely, as in the case of the inclined surface 27. The inclined surface 28, however, extends purely by way of example only partially up to the supporting element 21, ends at a distance from this. The inclined surfaces 27 and 28 each lie completely in an imaginary plane 29 or 30, which each encloses a certain angle with the longitudinal center plane 23. This angle is greater than 0° and less than 180°. For example, it is between 15 and 75°, preferably between 30 and 60°. The sloping surfaces 27 and 28 are here - viewed in cross section - aligned such that the recess 24 widens in the direction facing away from the intermediate window element 26 .

the figure 3 shows a schematic representation of the auxiliary rafter 11 in a second embodiment. In principle, reference is made to the above statements on the first embodiment and only the differences are discussed below. These lie in the fact that the support element 21 and the fastening elements 22 are no longer formed in one piece or integrally with one another, but that the fastening elements 22 and the support element 21 are connected to one another via at least one fitting element 31, in the exemplary embodiment shown here via a plurality of fitting elements 31 . The fitting element 31 is preferably made of a different material than the intermediate window element 26. For example, the fastening elements 22 and the supporting element 21 are made of wood, whereas the fitting element 31 is made of metal. The fitting element 31 here forms the contact surface 25 at least in regions. For example, the bearing surface 25 is composed of a plurality of bearing surface regions 32 spaced apart from one another. It can be seen that the inclined surfaces 27 and 28 are not only present on the fastening elements 22 but also extend to the fitting element 31 .

the figure 4 shows a schematic sectional view through the roof arrangement 1. The auxiliary rafter 11 is shown in its first embodiment; of course, however, the second embodiment can also be used. It can be seen that the roof structure has 4 rafters 33, on which in turn counter battens 34 and supporting battens 35 are fastened. Changes 36 and 37 are also fastened to the rafters 33, to which in turn the fastening elements 22 of the auxiliary rafters 11 are fastened. It can be seen that the support element 21 and the fastening elements 22 , ie the rafter element 20 , do not extend through an imaginary plane 38 which is defined by an underside of the supporting battens 35 and an upper side of the counter battens 34 . In addition, it is provided that the intermediate window element 26 does not reach through an imaginary plane 39 which is defined by an upper side of the supporting batten 35 . A particularly weatherproof roof arrangement 1 is hereby achieved.

the figure 5 shows a schematic sectional view through the roof assembly 1. It can be seen that each of the skylights 9 and 10 each have a frame 40 with each at least one side rail 41 has. The side rail 41 of each of the skylights 9 and 10 is now supported on the bearing surface 25, in particular via an insulating element 42 which is attached to the respective side rail 41. It can also be seen that the side rail 41 is also supported in the lateral direction via the insulating element 42 on the auxiliary rafter 11, namely on its intermediate window element 26. Provision can also be made for the insulating element 42 or an extension 43 of the insulating element 42 to be on the supporting element 21 fits snugly, this being the case for the skylights 9 and 10 on different sides of the intermediate window element 26 .

The skylights 9 and 10 are fastened to the auxiliary rafter 11, for example, on the intermediate window element 26, namely via corresponding fastening elements 44, which are shown here as fastening brackets. The fastening elements 44 act on the insulating elements 42 on the one hand and on the intermediate window element 26 on the other hand, so that the skylights 9 and 10 are supported on the roof structure 4 via the fastening elements 44 and the auxiliary rafters 11 and are fastened to it. The intermediate window element 26 of the auxiliary rafter 11 shown here has a smaller width than the rafter element 20. Alternatively, however, it can also be provided that it has the same width as the rafter element 20, in particular as the supporting element 21. In this case, the lateral areas of the Bearing surface 25. The bearing surface 25 is in this respect, for example, only formed on opposite sides of the intermediate window element 26 in the longitudinal direction. On the bearing surface 25 is in particular a batten, which is used to attach the skylight 9 and 10.

The described configuration of the roof arrangement 11 and in particular of the auxiliary rafter 11 enables the auxiliary rafter 11 to be arranged unobtrusively between the skylights 9 and 10 without the auxiliary rafter 11 protruding in the direction of the outside environment 5 beyond a sealing plane of the roof 2 . In that regard, a visually pleasing roof assembly 1 is realized with high weather resistance at the same time.

Claims (15)

1. Auxiliary rafter (11) for arrangement between a first skylight (9) and a second skylight (10) of a skylight assembly (3), characterised by a cranked rafter element (20) having a support element (21) for supporting the two skylights (9, 10), wherein on opposite sides of the supporting element (21) two fastening elements (22), which are arranged offset relative to the supporting element (21) with respect to a longitudinal centre plane (23) of the supporting element (21), adjoin the supporting element (21) for fastening the auxiliary rafter (11) to a roof structure (4) of a roof (2), and wherein on a side of the longitudinal centre plane (23) facing away from the fastening elements (22) an intermediate window element (26) is provided for spacing the two skylights (9, 10) on the rafter element (20).
2. Auxiliary rafter according to claim 1, characterised in that the rafter element (20) and the intermediate window element (26) are manufactured integrally.
3. Auxiliary rafter according to one of the preceding claims, characterised in that at least one resting surface (25) for at least one of the roof windows (9, 10) is formed on the support element (21), which resting surface (25) has a greater extension in a longitudinal direction of the support element (21) than the intermediate window element (26).
4. Auxiliary rafter according to one of the preceding claims, characterised in that the fastening elements (22) and the resting element (21) are connected to each other via at least one fitting element (31).
5. Auxiliary rafter according to one of the preceding claims, characterised in that the resting surface (25) has two spaced-apart resting surface regions (32) formed on the at least one fitting element (31).
6. Auxiliary rafter according to one of the preceding claims, characterised in that, viewed in longitudinal section, the rafter element (20) has a recess (24) located between the fastening elements (22) for forming the crank.
7. Auxiliary rafter according to one of the preceding claims, characterised in that, viewed in longitudinal section, the fastening elements (22) each have an inclined surface (27, 28) on their mutually facing sides, wherein an imaginary inclined surface plane (29, 30) completely accommodating the respective inclined surface (27, 28) is angled relative to the longitudinal centre plane (23), so that the recess (24) widens in the direction facing away from the supporting element (21).
8. Auxiliary rafter according to one of the preceding claims, characterised in that the inclined surface (27, 28) is formed at least partially on the at least one fitting element (31).
9. Auxiliary rafter according to one of the preceding claims, characterized in that the fastening elements (22) and the supporting element (21) are arranged on opposite sides with respect to an imaginary plane.
10. Skylight assembly (3) comprising a first skylight (9), a second skylight (10) and an auxiliary rafter (11) according to one or more of the preceding claims, characterized in that the auxiliary rafter (11) has a cranked rafter element (20) comprising a supporting element (21) for supporting the two skylights (9, 10), wherein on opposite sides of the supporting element (21) two fastening elements (22), which are arranged offset relative to the supporting element (21) with respect to a longitudinal centre plane (23) of the supporting element (21), adjoin the supporting element (21) for fastening the auxiliary rafter (11) to a roof structure (4) of a roof (2), and wherein on a side of the longitudinal centre plane (23) facing away from the fastening elements (22) an intermediate window element (26) is provided for spacing the two skylights (9, 10) on the rafter element (20).
11. Skylight assembly according to claim 10, characterised in that a longitudinal extent of the intermediate window element (26) corresponds at least to a longitudinal extent of a side spar (41) of one of the two skylights (9, 10) and a longitudinal extent of the supporting element (21) is greater than the longitudinal extent of the side spar (41), so that the side spar (41) is preferably supported over its entire longitudinal extent on a resting surface (25) of the supporting element (21).
12. Skylight assembly according to one of the claims 10 to 11, characterized in that the longitudinal extent of the supporting element (21) corresponds at least to a longitudinal extent of one of the skylights (9, 10), and in that at least one transverse spar fastened to the side spar (41) is supported on the resting surface (25) of the supporting element (21).
13. Roof assembly (1) comprising a roof (2) having a roof structure (4) and a roof skin (6), and a skylight assembly (3) according to any one of claims 10 to 12, comprising a first skylight (9), a second skylight (10) and an auxiliary rafter (11), characterised in that the auxiliary rafter (11) has a cranked rafter element (20) comprising a support element (21) for supporting the two skylights (9, 10), wherein on opposite sides of the supporting element (21) two fastening elements (22), which are arranged offset relative to the supporting element (21) with respect to a longitudinal centre plane (23) of the supporting element (21), adjoin the supporting element (21) for fastening the auxiliary rafter (11) to a roof structure (4) of a roof (2), and wherein on a side of the longitudinal centre plane (23) facing away from the fastening elements (22) an intermediate window element (26) is provided for spacing the two skylights (9, 10) on the rafter element (20).
14. Roof assembly according to claim 13, characterised in that the supporting element (21) and the fastening elements (22) are arranged on a side of an imaginary plane (39) facing away from the roof skin (6) of the roof (2), which plane receives an upper side of a supporting batten (35) of the roof structure (4) on which the roof skin (6) is supported.
15. Roof assembly according to one of the claims 13 to 14, characterized in that the fastening elements (22) are arranged on a side of an imaginary plane (38) facing away from the roof skin (6), which plane (38) receives an underside of the supporting battening (35) and/or a counterbattening (34) and/or a formwork of the roof structure (4).

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