Timber beam connection and roof structure of a lightweight hall with such a timber beam connection

Abstract

Timber beam connection in the roof structure (1) of lightweight halls, comprising a main beam (2), a crossbeam (3) arranged substantially perpendicular to the main beam (2), a connecting element (5), main connecting means (7) and second connecting means (8), wherein the connecting element (5) is detachably connected to the main beam (2) by means of the main connecting means (7) and the crossbeam (3) is detachably connected to the connecting element (5) by means of the second connecting elements (8) and wherein the crossbeam (3) has a recess (10) into which the connecting element (5) engages in its operating position, characterized in that the connecting element (5) is made of wood and comprises at least two main through-holes (12) for the passage of the main connecting means (7) and at least two second through-holes (13) for the passage of the second connecting means (8),wherein the main through-holes (12) and the secondary through-holes (13) extend within the connecting element (5) in directions perpendicular to each other.

Description

[0001] The present invention relates to a timber beam connection in the roof structure of lightweight halls and to a roof structure of a lightweight hall which includes such a timber beam connection.

[0002] Lightweight structures are used wherever temporary space solutions are required. These can range from short-term structures, such as event venues, that only last a few days to structures designed for use over several months. Besides the stability of the underlying structure, the focus is primarily on quick and easy dismantling and the frequent reusability of individual components. Furthermore, such structures generally need to exhibit a high level of fire resistance of at least 30 minutes, as temperatures of up to 850°C are typically reached in the event of a fire within this period.

[0003] The roof structure of typical lightweight halls is often made of wooden beams and comprises so-called main beams as well as crossbeams, also known as purlins, which are connected to the main beams on one or both sides and are essentially perpendicular to them. The purlins are generally connected to the main beams of the roof structure using metal connectors, preferably made of steel, as described, for example, in DE 197 24 285 A1 or DE 39 14 618 C2. In the event of a fire, a layer of char quickly forms on the wooden surfaces directly exposed to the flames, insulating the underlying layers of wood, particularly the core of the purlins and main beams, from the heat. However, the aforementioned steel connectors represent a weak point.Surface steel, due to its high thermal conductivity, heats up very quickly in the event of a fire and rapidly transfers the heat to the inner core of the main beams and purlins. This heat transfer at the joints can damage them to such an extent that the load-bearing capacity of the structure is significantly reduced, and a fire resistance of 30 minutes may not be achieved when using steel connectors.

[0004] EP 0 138 476 B1 proposes a connection for joining two wooden beams in a roof structure, which is located entirely inside the structure and not on its surface. It consists of a metal plate with nails on both sides, which is inserted between the beams to be joined. However, this solution is designed for a single installation and, due to the numerous nails driven into the wood, does not allow for the repeated assembly and disassembly with reuse of individual components that is necessary for lightweight halls.

[0005] It is therefore an object of the present invention to provide a timber beam connection in the roof structure of lightweight halls that can be assembled and disassembled quickly and repeatedly while also exhibiting high fire resistance. A further object of the invention is to provide a roof structure for a lightweight hall incorporating such a timber beam connection.

[0006] These tasks are solved by a timber beam connection with the features of claim 1 and by a roof structure of a lightweight hall according to claim 11.

[0007] Specific embodiments and further developments of the invention are the subject of the dependent claims.

[0008] According to claim 1, the invention is a timber beam connection in the roof structure of lightweight halls, comprising a main beam, a crossbeam arranged substantially perpendicular to the main beam, a connecting element, main connecting means and second connecting means, wherein the connecting element is detachably connected to the main beam by means of the main connecting means and the crossbeam is detachably connected to the connecting element by means of the second connecting means and wherein the crossbeam has a recess into which the connecting element engages in the operating position.The invention is characterized in that the connecting element is made of wood and comprises at least two main through-holes for passing the main connecting means and at least two second through-holes for passing the second connecting means, wherein the main through-holes and the second through-holes extend within the connecting element in directions perpendicular to each other.

[0009] The wooden beam referred to here as a crossbeam can also be called a purlin.

[0010] In other words, the core idea of ​​the invention is to also manufacture the connecting element for attaching the crossbeam to the main beam from wood. Surprisingly, it has been found that using a wooden connecting element results in better overall fire resistance of the connection than using a steel one. By using a wooden connecting element, the proportion of metal in the connection is significantly reduced; in particular, it avoids having large metal surfaces directly on the surface. This considerably reduces the direct heat transfer into the core of the wooden beams in the event of a fire.A layer of carbon formed on the wood surfaces initially acts as insulation, thus slowing the temperature rise in the core of the wooden beams and allowing them to retain their stability and load-bearing capacity for a longer period, even in the event of a fire. In this way, a fire resistance of 30 minutes or more can be achieved for the wooden beam connection according to the invention.

[0011] Furthermore, wood has the advantage that, unlike steel, it does not require protection against corrosion. This is beneficial when considering the frequent reuse of individual components in a wide variety of locations.

[0012] The main through-holes and the secondary through-holes are arranged offset from each other, so that the main through-holes and the secondary holes run completely separately from each other inside the connecting element. For example, a secondary through-hole can run in a space between two main through-holes. Alternatively, two secondary through-holes can be arranged in a space between two main through-holes.

[0013] According to one embodiment of the invention, the connecting element can be cuboid in shape. The connecting element can thus be a solid wooden cuboid pierced by the main through-holes and, perpendicular to these, by secondary through-holes. In principle, the connecting element can also be formed in another suitable shape, for example, trapezoidal. The wood used for the connecting element is preferably a very strong and durable wood with a comparatively high density. Preferably, a wood is used that has a strength class of D30 to D50 according to DIN EN 338. For example, it can be oak or meranti wood. The dimensions of the connecting element can vary depending on the application. For example, a wooden cuboid can have a height of 15-20 cm, a width of 5-7 cm, and a depth of 8-12 cm.

[0014] To connect the crossbeam to the main beam, the connecting element is first positioned on one side of the main beam and connected to it using the main connectors. These main connectors can, for example, consist of bolts with threads at both ends and two corresponding nuts. Alternatively, they can consist of bolts threaded at only one end and a corresponding nut. The bolts are inserted through the main through-holes of the connecting element and through corresponding holes in the main beam, and secured with one or two nuts, depending on the bolt's design. By using bolts with nuts screwed onto them from one or both ends for securing, the need to drive screws or nails directly into the wood is eliminated.This facilitates easy assembly and disassembly. Furthermore, the wood material is not damaged and the individual components can be reused many times.

[0015] According to one embodiment of the invention, the main connecting elements are located entirely inside the main beam and the connecting element when in use. For this purpose, the main through-holes in the connecting element can be expanded in a stepped manner in their end regions, so that even a thickened head of an inserted screw bolt or a nut screwed onto the screw bolt is located entirely inside the connecting element.

[0016] The crossbeam has a recess and is positioned against the main beam for assembly so that the connecting element engages in the recess of the crossbeam. It is secured using the secondary connecting elements. These secondary connecting elements can, for example, each consist of a screw bolt and corresponding nut. They can also include pins or bolts and corresponding locking elements, such as cotter pins. To secure the crossbeam, the bolts or pins are inserted through pre-drilled holes in the crossbeam and through the secondary through-holes in the connecting element, and then secured with the nuts or locking elements.

[0017] According to one embodiment of the invention, the second connecting elements may be arranged completely inside the crossbeam and the connecting element when in use. For this purpose, the second through-holes in the connecting element may be expanded in diameter in a stepped manner at their end regions.

[0018] The term "fully internal" refers to both primary and secondary fasteners, meaning that the primary and / or secondary fasteners are recessed within the respective wooden components and do not protrude beyond their outer surface. This further reduces and slows down the heat transfer into the interior of the wooden beams in the event of a fire.

[0019] In designs where the main connectors and / or secondary connectors are not completely enclosed within the connector or the timber beam, wooden covers can be provided to conceal the ends of the main connectors and / or secondary connectors. In other words, any ends of the main connectors and / or secondary connectors that protrude beyond the outer surface of the connector and / or the main beam and / or the crossbeam can be covered with wooden caps, ensuring that no metal is present on the surface of the timber beam connection in these areas and that the entire outward-facing surface of the timber beam connection is made of wood. In this way, a fire resistance rating of approximately 30 to 60 minutes can be achieved for the timber beam connection.

[0020] One embodiment of the invention provides that sleeves are arranged in the main through-holes and / or in the secondary through-holes. This makes it particularly easy to insert the main or secondary fasteners, and effectively prevents damage to the wood, for example splintering, during repeated assembly and disassembly.

[0021] For ease of assembly and disassembly, the dimensions of the connector and the recess in the crossbeam can be designed to allow for some play in the connection between the crossbeam and the connector. In other words, the opening width of the recess can be slightly larger than the corresponding width of the connector. This prevents the crossbeam from tilting when it is placed onto the connector. Furthermore, it allows for greater tolerance to variations in humidity and the associated swelling or shrinkage of the wood. Sufficient stability of the connection is nevertheless ensured by the additional connectors.Despite the play between the crossbeam and the connector, even in the event of a fire, heat penetrates the interior of the beams only slowly, as an insulating layer of char quickly forms on the wooden surfaces of both the connector and the beam. This is an advantage over connections with steel connectors, which, especially when the connections have play, transfer heat very quickly to the core of the wooden beams and compromise their stability.

[0022] In a further embodiment of the invention, the timber beam connection may comprise a second crossbeam arranged substantially perpendicular to the main beam, a second connecting element, and second connecting means, wherein the main connecting means are dimensioned in length such that both the first connecting element and the second connecting element are connected to the main beam by means of the main connecting means, and the second crossbeam is connected to the second connecting element by means of the second connecting means, and wherein the second crossbeam has a recess into which the second connecting element engages in its operating position, wherein the second connecting element is made of wood and comprises at least two main through-holes for the passage of the main connecting means and at least two second through-holes for the passage of the second connecting means.wherein the main through-holes and the secondary through-holes within the second connecting element extend in mutually perpendicular directions.

[0023] In other words, according to the invention, a crossbeam can also be arranged on both sides of the main beam, the attachment of the second crossbeam being carried out in essentially the same manner as the attachment of the first crossbeam described above and symmetrically to it with respect to the main beam. The main connecting elements simply need to be dimensioned in length so that they extend through the main beam and through both connecting elements.

[0024] The wooden beams referred to as the first and second crossbeams can also be called the first and second purlins.

[0025] What has been said above regarding the first connecting element and its possible designs applies equally to the second connecting element in the case of a design of the wooden beam connection with two crossbeams.

[0026] Accordingly, to connect the first and second crossbeams to the main beam, the first and second connecting elements are first positioned on either side of the main beam and connected to the main beam using the main connecting elements. These main connecting elements can comprise bolts with threads at both ends and two corresponding nuts. Alternatively, they can comprise bolts threaded at only one end and a corresponding nut. The bolts are inserted through the main through-holes of the first connecting element, through corresponding holes in the main beam, and through the main through-holes of the second connecting element, and secured with one or two nuts. In their installed position, the main connecting elements can be located entirely inside the main beam and the first and second connecting elements.For this purpose, the main through-holes in the connecting elements can be widened in diameter at their end regions so that even a thickened head of an inserted screw bolt and a nut screwed onto the screw bolt lie completely inside the connecting elements.

[0027] Both the first and second crossbeams each have a recess and are positioned against the main beam for assembly in such a way that the first connecting element engages in the recess of the first crossbeam and the second connecting element engages in the recess of the second crossbeam. They are secured using the second connecting elements. These second connecting elements can each consist of screw bolts and corresponding nuts. They can also consist of pins or bolts and corresponding locking elements, such as cotter pins. To secure the first crossbeam, the bolts or pins are inserted through pre-drilled holes in the first crossbeam and through the second through-holes in the first connecting element and secured with the nuts or locking elements. The same procedure applies to securing the second crossbeam.

[0028] Here too, it can be provided that the second connecting elements, when in use, are arranged entirely inside the first crossbeam and the first connecting element, or entirely inside the second crossbeam and the second connecting element. For this purpose, the second through-holes in the connecting elements can be expanded in diameter in a stepped manner at their ends.

[0029] In designs where the main connectors and / or secondary connectors are not completely enclosed within the two connectors or the wooden beams, wooden covers can be provided to cover the end areas of the main connectors and / or secondary connectors. This ensures that no metal is present on the surface of the wooden beam connection in these areas, and that the entire outward-facing surface of the wooden beam connection is made of wood. In this way, a fire resistance of approximately 30 to 60 minutes can be achieved for the wooden beam connection.

[0030] For ease of assembly and disassembly, the dimensions of the connectors and the recesses in the first and second crossbeams can be such that the connections between the first crossbeam and the first connector, and between the second crossbeam and the second connector, have some play. In other words, the opening width of the recesses can be slightly larger than the corresponding width of the connectors.

[0031] According to claim 11, the invention also relates to a roof structure of a lightweight hall, comprising at least one timber beam connection according to one of claims 1 to 10.

[0032] The invention will now be explained in more detail using an exemplary embodiment and with reference to the accompanying drawings. These show: Fig. 1: A section of the roof structure of a lightweight hall; Fig. 2: an embodiment of the timber beam connection according to the invention; Fig. 3: the wooden beam connection made of Fig. 2 in an exploded view; Fig. 4: a sectional view of the timber beam joint made of Fig. 3 from the top; Fig. 5: another sectional view of the timber beam connection made of Fig. 3; Fig. 6: a further embodiment of the timber beam connection according to the invention; Fig. 7: the wooden beam connection made of Fig. 6 in an exploded view; Fig. 8: a connecting element of the wooden beam joints; Fig. 9: a sectional view of the timber beam joint made of Fig. 6; Fig. 10: another sectional view of the timber beam connection made of Fig. 6 from the top; Fig. 11: a view of the connecting element from Fig. 8 from the front; Fig. 12: a side view of the connecting element made of Fig. 8; Fig. 13: a view of the connecting element from Fig. 8 from the top; Fig. 14: a sectional view of a crossbeam; Fig. 15: another sectional view of the crossbeam made of Fig. 14.

[0033] Fig. Figure 1 shows a section of the roof structure, designated as 1 in its entirety, of a lightweight hall (not shown in detail). The roof structure 1 comprises several main beams 2 and numerous transverse beams 3, 4, also referred to as purlins, which run perpendicular to them and are connected to the main beams 2 partly on one side and partly on both sides.

[0034] The in Fig. The area indicated by the dashed line A is in Fig. Figure 2 is enlarged and shows a connection area between a crossbeam 3 and a main beam 2. The crossbeam 3 is arranged essentially at right angles to the main beam 2.

[0035] From the exploded view of the Fig. 3 the inventive design of the timber beam connection according to Fig. 2 clearly. The timber beam connection includes a connecting element 5 for connecting the crossbeam 3 to the main beam 2.

[0036] The connecting element 5 is made of meranti wood. Furthermore, the timber beam connection includes main connectors 7, wherein the connecting element 5 is connected to the main beam 2 by means of the main connectors 7. The main connectors 7 are designed here as two screw bolts with a thread formed at one end. The connecting element 5 includes two main through holes 12 through which the main connectors 7 pass. The length of the main connectors 7 is dimensioned such that, as in the Fig. As indicated in Figure 3, the bolts first pass through bores in the main beam 2 and then through the main through-bores 12 in the connecting element 5. There, the bolts are each secured with a nut 20 such that the connecting element 5 is firmly and securely connected to the main beam 2. Washers 21 can be arranged between the thickened head of the main connecting element 7 and the main beam 2.

[0037] The crossbeam 3 is now placed onto the connecting element 5, which is thus connected to the main beam 2, with the crossbeam 3 having a recess 10 for this purpose. The recess 10 is shown in the illustrations of the Fig. 14 and Fig. As can be seen in Figure 15, the recess 10 is dimensioned such that the crossbeam 3 can be placed on the connecting element 5 with some play. To fix the crossbeam 3 to the connecting element 5, the latter has two secondary through-holes 13 for the passage of the secondary connecting elements 8. The secondary through-holes 13 extend within the connecting element 5 in a direction perpendicular to the direction of the primary through-holes 12. The crossbeam 3 is connected to the connecting element 5 by means of the secondary connecting elements 8. For this purpose, the crossbeam 3 has bores 14 which, in the installed position, are aligned with the secondary through-holes 13 and through which the secondary connecting elements 8 are passed. The secondary connecting elements 8 are designed here as pins, which are secured by means of cotter pins 15; see also the illustration in Figure 15. Fig. 4.

[0038] The described timber beam connection therefore has a very low metal content due to the connecting element 5 being made of wood, which is advantageous with regard to the fire resistance of the connection.

[0039] The sectional views of the Fig. 4 and Fig. Figure 5, in two mutually perpendicular directions, shows the complete wooden beam connection. The second connecting elements 8, which are designed as pins, protrude slightly from the wood material at their front and rear ends in the illustrated embodiment, cf. Fig. 4, wherein they are secured against slipping out of the second through-holes 13 by means of cotter pins 15. For this purpose, the cotter pins 15 are inserted into openings in the second connecting elements 8. The end regions of the main connecting elements or the second connecting elements that project beyond the outer surface of the main beam or the crossbeam, respectively, can be covered by wooden caps not shown in the figures.

[0040] The in Fig. The area indicated by the dashed line B is in Fig. Figure 6 is enlarged and shows a connection area between a first crossbeam 3, a second crossbeam 4 and a main beam 2. The first crossbeam 3 and the second crossbeam 4 are arranged essentially perpendicular to the main beam 2.

[0041] From the exploded view of the Fig. 7. The design of the timber beam connection will be described in accordance with Fig. 6 clearly. The timber beam connection comprises a first connecting element 5 for connecting the first crossbeam 3 to the main beam 2, as well as a [missing element] shown in the illustration of the Fig. 7. Invisible second connecting element 6 for connecting the second crossbeam 4 to the main beam 2. The second connecting element 6 is, for example, shown in the illustration of the Fig. Figure 9 shows that the two connecting elements 5 and 6 are made of meranti wood. The timber beam connection also includes main connecting elements 7, whereby both the first connecting element 5 and the second connecting element 6 are connected to the main beam 2 by means of the correspondingly longer main connecting elements 7. The main connecting elements 7 are designed here as two screw bolts with a thread at one end. The two connecting elements 5 and 6 each include two main through holes 12 through which the main connecting elements 7 pass. The length of the main connecting elements 7 is dimensioned such that, as shown in the figure 9, they Fig. As indicated in Figure 7, the bolts are first guided through the main through-holes 12 in the first connecting element 5, then through holes in the main beam 2, and finally through the main through-holes 12 in the second connecting element 6. There, the bolts are each secured with a nut in such a way that the connecting elements 5 and 6 are firmly and securely connected to the main beam 2.

[0042] The first crossbeam 3 and the second crossbeam 4 are now placed onto the connecting elements 5, 6, which are thus connected to the main beam 2. The first crossbeam 3 has a recess 10 for this purpose, and the second crossbeam 4 has a corresponding recess 11. The recess 10 of the first crossbeam 3 is shown in the illustrations of the Fig. 14 and Fig. Figure 15 shows that the recesses 10 and 11 are dimensioned such that the first crossbeam 3 and the second crossbeam 4 can each be placed onto the connecting elements 5 and 6 with some play. To fix the crossbeams 3 and 4 to the connecting elements 5 and 6, the latter each have two secondary through-holes 13 for the passage of the secondary connecting elements 8 and 9. The secondary through-holes 13 extend within the connecting elements 5 and 6 in a direction perpendicular to the direction of the main through-holes 12. The first crossbeam 3 is connected to the first connecting element 5 by means of a secondary connecting element 8; similarly, the second crossbeam 4 is connected by means of a connecting element 8. Fig. 7. The second connecting element 9, not visible, is connected to the second connecting element 6. The second connecting elements 8, 9 are made of Fig. 10. The first and second crossbeams 3, 4 have bores 14 through which the second connecting elements 8, 9 are passed. The second connecting elements 8, 9 are designed here as pins, which are secured by means of cotter pins 15; compare also the illustration of the Fig. 10.

[0043] The sectional views of the Fig. 9 and Fig. Figures 10 in two mutually perpendicular directions each show the complete timber beam connection according to Fig. 6. From the Fig. Figure 9 shows that the main connectors 7 are located entirely inside the first and second connectors 5, 6 and the main beam 2. In the illustrated embodiment, the second connectors 8 and 9, which are designed as pins, protrude slightly from the wood at their front and rear ends, respectively, and are secured against slipping out of the second through-holes 13 by means of cotter pins 15. For this purpose, the cotter pins 15 are inserted into openings in the second connectors 8, 9. The end regions of the main connectors and the second connectors that project beyond the outer surface of the main beam and the crossbeam, respectively, can be covered by wooden caps (not shown in the figures).

[0044] This timber beam connection also has a very low metal content due to the connecting elements 5, 6 being made of wood, which is advantageous with regard to the fire resistance of the connection.

[0045] Fig. Figure 8 shows a connecting element 5, as it is used in the timber beam connection according to Fig. 2 or according to Fig. 6 is used, shown in detail. The connecting element 5 is made as a solid cuboid of meranti wood and is penetrated by two main through holes 12 and, in a perpendicular direction, by two secondary through holes 13. The diameter of the main through holes 12 is widened in a stepped manner adjacent to a front end face 16 of the connecting element 5. This results in the following for the timber beam connection according to Fig. 6. When the main connecting elements 7 are passed through, neither the thickened head 27 of the main connecting elements 7 nor a nut screwed onto the opposite end protrudes beyond the outer surface of the connecting elements 5, 6. Rather, the main connecting elements 7, including any nuts, lie completely inside the connecting elements 5, 6 and the main beam 2; see also the illustration of the Fig. 9.

[0046] Both the main through-holes 12 and the secondary through-holes 13 each contain sleeves that facilitate the insertion of the main fasteners 7 and the secondary fasteners 8, 9 and protect the wood from damage. This is advantageous with regard to the desired ease of assembly and disassembly and the multiple reuse of the individual components. The sleeves are not visible in the illustrations.

[0047] The Fig. Figure 11 shows a front view of the connecting element 5, looking towards the end face 16. The course of the second through-holes 13 is indicated by dashed lines. The figure shows the Fig. Figure 12 shows a top view of a side surface 17 of the connecting element 5, with the position of the main through-holes 12 indicated by dashed lines. The stepwise widening of the diameter of the main through-holes 12 adjacent to the end face 16 is clearly visible in this illustration. In this widened area, the thickened head 27 of the main connecting element 7, designed as a screw bolt, comes to rest in the insertion position, and at the opposite end, a nut 20 for fixing the screw bolt is located in the second connecting element 6. From the Fig. 11 and Fig. Figure 12 shows that the two second through-bores 13 are arranged in a space between the two main through-bores 12. Fig. Figure 13 shows a top view of an upper surface 18 of the connecting element 5, with the position of the main through holes and the second through holes perpendicular to them being indicated by dashed lines.

[0048] The illustrated connecting element 5 has a height H of approximately 18 cm, a width B of approximately 6 cm, and a depth T of approximately 10 cm. The diameter of the second through-holes 13 is approximately 18 mm, the diameter of the main through-holes 12 is approximately 17 mm, and widens to a diameter of approximately 36 mm adjacent to the end face 16.

[0049] The Fig. 14 and Fig. Figure 15 shows the formation of the recess 10 in one end region of the crossbeam 3. The dimensions of the recess 10 in the crossbeam 3 and the recess 11 in the second crossbeam 4 are chosen such that a certain amount of play exists when the connecting elements 5, 6 engage in the recesses 10, 11. This prevents tilting during assembly and disassembly. Furthermore, the individual components can still be assembled and disassembled quickly and easily even if the wood has swollen slightly, for example, due to increased humidity or other moisture. This distinguishes the described wood joint from known mortise and tenon or dowel joints. The Fig. 14 and Fig. The crossbeam 3 shown in Figure 15 has a height h of approximately 28 cm and a width b of approximately 12 cm.

[0050] In summary, the metal content of the described timber beam connection is significantly reduced compared to known timber beam connections due to the manufacture of the connecting elements 5 and 6 from wood. This results in a fire resistance of 30 minutes or more for the timber beam connection. At the same time, the described timber beam connection is quick and easy to assemble and disassemble, and the individual components can be reused many times. Therefore, the timber beam connection is ideally suited for the roof structure of lightweight buildings. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 197 24 285 A1

[0003] DE 39 14 618 C2

[0003] EP 0 138 476 B1

[0004]

Claims

[1] Timber beam connection in the roof structure (1) of lightweight halls, comprising a main beam (2), a crossbeam (3) arranged substantially perpendicular to the main beam (2), a connecting element (5), main connecting means (7) and second connecting means (8), wherein the connecting element (5) is detachably connected to the main beam (2) by means of the main connecting means (7) and the crossbeam (3) is detachably connected to the connecting element (5) by means of the second connecting elements (8) and wherein the crossbeam (3) has a recess (10) into which the connecting element (5) engages in its operating position, characterized by, that the connecting element (5) is made of wood and comprises at least two main through holes (12) for passing the main connecting means (7) and at least two second through holes (13) for passing the second connecting means (8), wherein the main through holes (12) and the second through holes (13) extend within the connecting element (5) in directions perpendicular to each other. [2] Timber beam connection according to claim 1, characterized by , that the connecting element (5) is cuboid in shape. [3] Timber beam connection according to claim 1 or 2, characterized by , that the main connecting elements (7) are arranged completely inside the connecting element (5) and the main beam (2) in the operating position. [4] Timber beam connection according to claim 1 or 2, characterized by , that wooden covers are provided to cover the end areas of the main fasteners (7). [5] Timber beam connection according to any one of claims 1 to 4, characterized by , that in the operational position the second connecting means (8) are arranged completely inside the crossbeam (3) and the connecting element (5). [6] Timber beam connection according to any one of claims 1 to 4, characterized by , that wooden covers are provided to cover the end areas of the second fasteners (8). [7] Timber beam connection according to any one of claims 1 to 6, characterized by that sleeves are arranged in the main through-holes (12) and / or in the second through-holes (13). [8] Timber beam connection according to any one of claims 1 to 7, characterized by , that the dimensions of the connecting element (5) and the recess (10) in the crossbeam (3) are dimensioned such that the connection between the connecting element (5) and the crossbeam (3) has play. [9] Timber beam connection according to any one of claims 1 to 8, characterized by, that the timber beam connection comprises a second crossbeam (4) arranged substantially perpendicular to the main beam (2), a second connecting element (6) and second connecting means (9), wherein the main connecting means (7) are dimensioned in length such that both the first connecting element (5) and the second connecting element (6) are detachably connected to the main beam (2) by means of the main connecting means (7) and the second crossbeam (4) is detachably connected to the second connecting element (6) by means of the second connecting means (9) and wherein the second crossbeam (4) has a recess (11) into which the second connecting element (6) engages in its operating position,wherein the second connecting element (6) is made of wood and comprises at least two main through holes (12) for passing the main connecting elements (7) and at least two secondary through holes (13) for passing the secondary connecting elements (9), wherein the main through holes (12) and the secondary through holes (13) extend within the second connecting element (6) in directions perpendicular to each other. [10] Timber beam connection according to claim 9, characterized by , that wooden covers are provided to cover the end areas of the second fasteners (9). [11] Roof structure (1) of a lightweight hall, comprising at least one timber beam connection according to one of claims 1 to 10.

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