A modular keder rail

Abstract

A modular keder rail comprising: a first elongated structural member (21) having a keder groove (31-34) extending along the length of the first structural member (21) and a first recess (37a) located at a first end face of the first structural member (21); a second elongated structural member (22) having a keder groove (31-34) extending along the length of the second structural member (22) and a first recess (37b) located at a first end face of the second structural member (22); and a first gasket arrangement (36); wherein the first and second elongated structural members (21, 22) are configured for being arranged next to each other, such that the first recesses (37a, 37b) of the first and second structural members (21, 22) faces each other; and wherein the first gasket arrangement (36) is configured to be located in the first recesses (37a, 37b) and to be compressed between the first and second structural members (21, 22) for providing a weatherproof seal between the first and second structural members (21, 22).

Description

[0001] A MODULAR KEDER RAIL

[0002] TECHNICAL FIELD

[0003] The present disclosure relates to modular keder rail, as well as a method for assembling a modular keder rail. The modular keder rail is for example suitable for construction of temporary roof installations, but may also be used for more permanent roof installations. The modular keder rail may for example be used for weather protection.

[0004] Moreover, even if the modular keder rail according to the disclosure will be described primarily in relation to a roof support beam, the modular keder rail is not restricted to this use, but may equally be used for other purposes, such as side wall, privacy protection, or the like.

[0005] BACKGROUND

[0006] Keder, also known as keder chord, is typically attached to a fabric for enabling a continuous sealed connection between a fabric and a rigid structural member. Keder is used in a variety of applications including for example permanent and semipermanent tents and structures.

[0007] A keder system comprises for example a sheet fabric or tarpaulin having a keder chord attached thereto a side edge of a fabric, and a keder groove provided in for example a rigid support beam, also known as luff track beam. Upon inserting the keder chord into the keder groove, a continuous sealed connection between fabric and support beam is accomplished.

[0008] Modular keder rails are known in the prior art. These known modular keder rails are for example provided in connection with roof support beams for enabling installation of a tarpaulin stretching between two neighbouring support beams.

[0009] However, the known keder roofs made using modular keder rails generally suffer from leakage problems, i.e. rain water may leak through the keder roof and cause problems and dissatisfaction for people, animals or equipment located under the keder roof. SUMMARY

[0010] An object of the present disclosure is to provide a modular keder rail where the previously mentioned problems are avoided. This object is at least partly achieved by the features of the independent claims.

[0011] According to a first aspect of the present disclosure, there is provided a modular keder rail comprising: a first elongated structural member having a keder groove extending along the length of the first structural member and a first recess located at a first end face of the first structural member; a second elongated structural member having a keder groove extending along the length of the second structural member and a first recess located at a first end face of the second structural member; and a first gasket arrangement; wherein the first and second elongated structural members are configured for being arranged next to each other, such that the first recesses of the first and second structural members faces each other; and wherein the first gasket arrangement is configured to be located in the first recesses and to be compressed between the first and second structural members for providing a weatherproof seal between the first and second structural members.

[0012] This novel design, in which a gasket arrangement is located in a first recess of each of the first and second structural members, enables improved control of the gasket arrangement condition, and thus improved sealing performance. For example, the risk for excessive compressive load on the gasket arrangement, caused by for example bending motion of the modular keder rail, is reduced because high compressive load will then be transferred through a metal to metal contact between the first and second structural members, and not through the gasket itself as in the prior art solution, in which a flat gasket was simply located between flat end faces of the first and second structural members.

[0013] The metal to metal contact will be provided by the wall sections of the first and second structural members that surrounds the first recesses.

[0014] The novel modular keder rail design according to the present disclosure also enables use of a gasket arrangement having a larger thickness and higher modulus of elasticity, because the gasket arrangement does no longer need to be designed to withstand high compressive forces, but may instead focus on providing a high sealing performance.

[0015] Further advantages are achieved by implementing one or several of the features of the dependent claims.

[0016] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first gasket arrangement is a single-piece gasket that is configured to be located in the first recess of both the first and second structural members.

[0017] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first gasket arrangement is a dual-piece gasket having a first part configured to be located in the first recess of the first structural member, and a second part configured to be located in the first recess of the second structural member, and wherein the first and second parts are configured to abut each other in an assembled state of the first and second structural members. Thereby, each gasket part can protrude just a little beyond the abutment surface of the first and second structural members, and the design may enable mounting of each of the first and second rail segments in both directions.

[0018] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first part of the first gasket arrangement is configured to protrude out from the first recess of the first elongated structural member in an uncompressed state of said first part, and the first part of the first gasket arrangement is configured to protrude out less from the first recess, or to be flush with an abutment surface of the first elongated structural member, in a compressed state of said first part. Thereby, the gasket arrangement may exhibit a relatively high level of elastic deformation with maintained sealing performance, while being protected from over-compression by means of the first recess.

[0019] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first elongated structural member has an abutment surface that is configured to abut a corresponding abutment surface of the second structural member, wherein a first part of the first gasket arrangement is configured to protrude out from the first recess and beyond the abutment surface of the first elongated structural member, in a longitudinal direction of the first elongated structural member, in a uncompressed state of the first gasket, and wherein the first part of the first gasket arrangement is configured to protrude out less from the first recess, or to be flush with the abutment surface of the first elongated structural member, in a longitudinal direction of the first elongated structural member, in a compressed state of the first gasket arrangement. Thereby, the first gasket arrangement may exhibit a relatively high level of elastic deformation with maintained sealing performance, while being protected from over-compression by means of the first recess.

[0020] In some example embodiments, that may be combined with any one or more of the above-described embodiments, each of the first and second elongated structural members have hollow and closed profiles. This provides high strength and simplifies formation of the first recess.

[0021] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first elongated structural member has an abutment surface, the second elongated structural member has an abutment surface, and said abutment surfaces are configured to abut each other to provide a gasket compression limiting arrangement in a connected / assembled state of the first and second elongated structural members. Thereby, the gasket arrangement may exhibit a relatively high level of elastic deformation with maintained sealing performance, while being protected from over-compression by means of the first recess.

[0022] In some example embodiments, that may be combined with any one or more of the above-described embodiments, each of the first and second elongated structural members has an abutment surface, wherein said abutment surfaces are configured to face and potentially abut each other in a connected / assembled state of the first and second elongated structural members, wherein the bottom surface of the first recess of the first structural member is inwardly offset from the abutment surface of the first structural member, and wherein the bottom surface of the first recess of the second structural member is inwardly offset from the abutment surface of the second structural member. Thereby, the gasket arrangement may exhibit a relatively high level of elastic deformation with maintained sealing performance, while being protected from over-compression by means of the first recess. In some example embodiments, that may be combined with any one or more of the above-described embodiments, each of the first and second elongated structural members has a hollow profile with an elongated side wall, wherein an end face of the side wall of the first and second elongated structural members form said abutment surfaces. The enables a cost-effective design because the hollow profile requires very little additional processing after manufacturing.

[0023] In some example embodiments, that may be combined with any one or more of the above-described embodiments, each of the first and second elongated structural members has a hollow profile with an elongated side wall, wherein a support member is fastened within the hollow profile of the first structural member inwardly offset from a first end face of the first structural member, wherein a support member is fastened within the hollow profile of the second structural member inwardly offset from a first end face of the second structural member, wherein the first recess of the first structural member is defined by the support member and the interior side wall surface of the first structural member, and wherein the first recess of the second structural member is defined by the support member and the interior side wall surface of the second structural member. This enables a cost-effective design because the hollow profile requires very little additional processing after manufacturing, and the support members may be relatively cost-efficiently manufactured and installed in the hollow profiles.

[0024] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the support members form bottom surfaces of the first recesses.

[0025] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the support members have a peripheral shape that corresponds to the internal shape of first and second structural members. Thereby, the first gasket arrangement has good support from the rear side, thereby enabling improved sealing performance in a lateral direction within the first recess.

[0026] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the support members have a flat shape that is arranged in a plane perpendicular to a longitudinal extension of the first and / or second structural members. This enables a cost-effective design because the flat support members may be relatively cost-efficiently manufactured and installed in the hollow profiles.

[0027] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the support members are removably fastened to the first and second structural members, respectively, by one or more fasteners. This enables cost-effective assembly of the first and second structural members, as well as simplified repair in case of damage.

[0028] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the support members are permanently fastened to the first and second structural members, respectively. This enables a more robust and reliable design of the first and second structural members.

[0029] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first gasket arrangement has a peripheral shape that corresponds to the internal shape of first and second structural members. Thereby, the first gasket arrangement enables improved sealing performance.

[0030] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first gasket arrangement has a flat shape that is arranged in a plane perpendicular to a longitudinal extension of the first and second structural members, respectively. This enables a compact design with a relatively shallow first recess.

[0031] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first gasket arrangement is arranged around the keder grooves of the first and second structural members for preventing leakage from keder grooves into the gap between first and second structural members. Thereby, the first gasket arrangement enables improved sealing performance.

[0032] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first gasket arrangement is made of elastic material and is removably fastened to one or both of the support members by one or more fasteners. This enables cost-effective assembly of the first and second structural members, as well as simplified repair in case of damage. In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first and second structural members are made of extruded metal profiles. This enables cost-effective manufacturing of the first and second structural members

[0033] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the support members are made of a metal plate, in particular aluminium metal plate. This enables cost-effective manufacturing of the first and second structural members

[0034] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first elongated structural member further has a first alignment member protruding out from the first end face of the first structural member, in the longitudinal direction of the first elongated structural member, wherein the second elongated structural member further has a corresponding depression or hole located at the first end face of the second structural member, wherein the first alignment member is configured to engage the depression or hole for ensuring accurate mutual alignment of the first and second structural members in a state when the first and second elongated structural members are assembled to form continuous elongated modular keder rail. This ensures proper alignment of the first and second structural members, such that the keder chord of a tarpaulin can be more easily slided through the keder groove of the modular keder rail.

[0035] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first alignment member is moveable between a first position in which the first alignment member protrude out from the first end face of the first structural member, and a second position in which the first alignment member does not protrude out from the first end face of the first structural member. This design enables simplified disassembly and assembly of a single rail segment in an assembled modular keder rail.

[0036] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first alignment member is linearly slidably moveable in the longitudinal direction of the first structural member.

[0037] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first alignment member extends through a hole in the support member of the second structural member. Thereby, the support member may have a large distribution within the profile of the first structural member.

[0038] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first alignment member extends through a hole in the first gasket arrangement. Thereby, the first gasket arrangement may have a large distribution within the profile of the first structural member.

[0039] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the corresponding depression or hole of the second structural member is provided in the support member of the second structural member. Thereby, the first alignment member of the first structural member will have a robust and rigid support in the second structural member.

[0040] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first alignment member is a cylindrical pin, and wherein the corresponding depression or hole located at the first end face of the second structural member is configured to receive an end portion of said pin for ensuring accurate mutual alignment of the first and second structural members.

[0041] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the first alignment member is located in a centre region of the first structural member.

[0042] In some example embodiments, that may be combined with any one or more of the above-described embodiments, also the second elongated structural member has a first alignment member protruding out from the first end face of the second structural member, in the longitudinal direction of the second elongated structural member, wherein also the first elongated structural member has a corresponding depression or hole located at the first end face of the first structural member, wherein the first alignment member of the second structural member is configured to engage the depression or hole of the first structural member for ensuring accurate mutual alignment of the first and second structural members, wherein the first alignment member of the first structural member and the corresponding depression or hole of the first structural member are located side by side. Two alignment members enables improved angular locking of the first and second structural members relative to each other. In some example embodiments, that may be combined with any one or more of the above-described embodiments, the modular keder rail further comprises a third elongated structural member having a keder groove extending along the length of the third structural member; and a second gasket arrangement; wherein the first elongated structural member has second recess located at a second end face of the first structural member, wherein the third elongated structural member has a first recess located at a first end face of the third structural member, wherein the first, second and third elongated structural members are configured for being arranged next to each other, such that the first recess of the first structural member faces the first recess of the second structural member, and such that the first recess of the third structural member faces the second recess of the first structural member; and wherein the second gasket arrangement is configured to be located in the second recess of the first structural member and in the first recess of the third structural member and to be compressed between the first and third structural members for providing a weatherproof seal between the first and third structural members.

[0043] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the modular keder rail is suitable for a being a part of a roof support beam, or for being integrated in a roof support beam.

[0044] The disclosure also relates to a first rail segment of a modular keder rail comprising: an elongated structural member having a first end with a first end face, a second end with a second end face, a keder groove extending along the length of the first structural member, a first recess located at the first end face; a second recess located at the second end face; a first gasket configured to be located in the first recess; and a second gasket configured to be located in the second recess; wherein the first rail segment is configured to be arranged next to a second rail segment and a third rail segment to form continuous elongated modular keder rail, and wherein the first gasket is configured to be compressed between a bottom surface of the first recess and the second rail segment for providing a weatherproof seal between the first and second rail segments, wherein the second gasket is configured to be compressed between a bottom surface of the second recess and the third rail segment for providing a weatherproof seal between the first and third rail segments.

[0045] The disclosure also relates to a keder roof comprising a first modular keder rail as described above arranged parallel with and spaced apart from a second modular keder rail as described above, wherein a tarpaulin is mounted in a keder groove of the first and second modular keder rails.

[0046] The disclosure also relates to a modular keder roof support beam comprising: at least one lattice roof support beam having an upper chord, a lower chord, and a plurality of intermediate connecting diagonal members; and the modular keder rail as described above, wherein the structural members of the modular keder rail are attached to the upper chord of the at least one lattice roof support beam, and wherein the structural members are connected end to end to jointly form a continuous elongated modular keder rail; or a plurality of lattice roof support beam segments, each having an upper chord, a lower chord, and a plurality of intermediate connecting diagonal members; wherein the plurality of lattice roof support beam segments are connected end to end to jointly form a continuous elongated modular keder roof support beam; wherein the modular keder rail as described above forms the upper chord of the modular keder roof support beam.

[0047] In some example embodiments, that may be combined with any one or more of the above-described embodiments, at least one structural member of the modular keder rail comprises a set of rail holders for detachable fastening of the modular keder rail to the at least one lattice roof support beam.

[0048] In some example embodiments, that may be combined with any one or more of the above-described embodiments, the rail holder has a foot for detachable fastening of the modular keder rail on the at least one lattice roof support beam, and wherein a contact surface of the foot is located spaced apart from the keder groove with a distance of at least 5 cm, specifically at least 25 cm, and more specifically within a range of 5 - 150 cm.

[0049] The disclosure also relates to a method for assembling a modular keder rail having a first and a second elongated structural members, wherein the first elongated structural member has a keder groove extending along the length of the first structural member and a first recess located at a first end face of the first structural member, wherein the second elongated structural member having a keder groove extending along the length of the second structural member and a first recess located at a first end face of the second structural member, the method comprising: positioning a first gasket arrangement in the first recess of one or both of the first and second structural members; arranging the first and second elongated structural members next to each other, such that the first recesses of the first and second structural members faces each other, and such that the first gasket arrangement is compressed for providing a weatherproof seal between the first and second structural members.

[0050] The disclosure also relates to a modular keder rail comprising: a first elongated structural member having a keder groove extending along the length of the first structural member, and a first alignment member protruding out from the first end face of the first structural member, in the longitudinal direction of the first elongated structural member; a second elongated structural member having a keder groove extending along the length of the second structural member, and a corresponding depression or hole located at the first end face of the second structural member and configured for receiving the first alignment member; wherein the first and second elongated structural members are configured for being arranged next to each other, and wherein the first alignment member is configured to engage the depression or hole for ensuring accurate mutual alignment of the first and second structural members in a state when the first and second elongated structural members are assembled to form continuous elongated modular keder rail.

[0051] Further features and advantages of the invention will become apparent when studying the appended claims and the following description. The skilled person in the art realizes that different features of the present disclosure may be combined to create embodiments other than those explicitly described hereinabove and below, without departing from the scope of the present disclosure.

[0052] BRIEF DESCRIPTION OF DRAWINGS

[0053] The “Item and method” according to the disclosure will be described in detail in the following, with reference to the attached drawings, in which

[0054] Fig. 1 A shows schematically a view of the roof support structure,

[0055] Fig. 1 B shows a close-up view of a part of figure 1 A,

[0056] Fig. 2 shows schematically a view of the roof support structure having tarpaulins mounted thereon,

[0057] Fig. 3A shows schematically a side-view of the roof support structure, Fig. 3B-C show close-up views of parts of figure 3A,

[0058] Fig. 4 shows details of the curved section of the elongated rail structure

[0059] Fig. 5A-B show the modular design of the modular keder rail,

[0060] FIG. 6 shows a perspective view of an example embodiment of the modular keder rail,

[0061] FIG.7 shows a closer view of the first structural member,

[0062] FIG. 8 shows a magnified view of the first end of the first structural member,

[0063] FIG. 9A shows the modular keder rail in a disconnected state,

[0064] FIG. 9B shows the modular keder rail in a connected state,

[0065] FIG. 10 shows a side view of the first structural member,

[0066] FIG. 11A-D show various operating conditions of the modular keder rail,

[0067] FIG. 12A-B show an example embodiment having a single-piece gasket,

[0068] FIG. 13 shows an exploded view of the first end of the first structural member,

[0069] FIG. 14A-B show magnified views of the assembly to be installed in the first and second structural members,

[0070] FIG. 15 shows details relating to connection of the modular keder rail,

[0071] FIG. 16 shows a side view of the first structural member with support member and first alignment member,

[0072] FIG.17 shows operation of the first alignment members,

[0073] FIG.18A-C show operation of the first alignment members,

[0074] FIG. 19A-B show the modular keder rail integrally formed in an modular keder beam, in particular a modular roof keder beam.

[0075] FIG. 20 shows schematically a modular keder rail having three keder segments.

[0076] DESCRIPTION OF EXAMPLE EMBODIMENTS

[0077] Various aspects of the disclosure will hereinafter be described in conjunction with the appended drawings to illustrate and not to limit the disclosure, wherein like designations denote like elements, and variations of the described aspects are not restricted to the specifically shown embodiments, but are applicable on other variations of the disclosure.

[0078] The modular keder rail according to the present disclosure can be utilised for many different purposes, such as construction of roofs, walls, tents, entire buildings, etc. The modular keder rail may be used as load carrying member itself, or being attached to a separate dedicated load carrying structural member, or being an integral part of a load carrying structural member.

[0079] Figures 1A-B, 2, 3A-C, 4 and 5A-B show some example implementations of the modular keder rail according to the present disclosure for providing a tent having a roof and side walls.

[0080] Figure 1A and figure 2 schematically show a perspective overview of a keder roof system, wherein figure 1A shows an assembled roof support structure 1 before mounting of a set of tarpaulins, and figure 2 shows the assembled roof support structure 1 after mounting of the set of tarpaulins 15-17. The assembled and installed keder roof system may be deemed having an extension in a roof width direction 25, a roof length direction 26 that is perpendicular to the roof width direction 25, and a roof height direction 27 that is perpendicular to both the roof width and roof length directions 25, 26.

[0081] In the example embodiment of figures 1A, 2, the assembled roof support structure 1 of figure 1A comprises four roof support beams 2-5 arranged spaced apart side by side in the roof length direction 26, namely a first 2, a second 3, a third 4 and a fourth 5 roof support beam, wherein neighbouring roof support beams 2-5 are mutually structurally connected via brazing elements and / or ledgers 6 for defining a rigid framework the forms the roof support structure 1. Figure 1 B shows a closed-up view of a portion of the roof support structure 1 in the region of the fourth roof support beam 5.

[0082] One of the primary purposes of the roof support structure 1 is to carry and hold the tarpaulins at a desired position, and being capable of withstanding loads transferred to the roof support structure 1 from the tarpaulins and caused by for example winds, snow loads, etc.

[0083] The finished keder roof system of figure 2 comprises a roof ridge region 13, and first eave region 18 and a second eave region 19. The portion of the roof located between the roof ridge region 13 and the first or second eave region 18, 19 may be referred to as an intermediate region 20. Neighbouring roof support beams 2-5, such as for example the first and second roof support beams 2, 3 jointly define a roof bay 10. Hence, the roof structure of figure 2 comprises three roof bay regions 10, 11 , 12.

[0084] In the example embodiment of figure 2, a first tarpaulin 15 is being mounted to cover the first roof bay region 10 by means of first and second roof builders 24, who cooperate for jointly pulling and mounting the first tarpaulin 15 on the roof support structure using two pull ropes 14. A second tarpaulin 16 has been mounted to cover the second roof bay region 11 , and a third tarpaulin 17 has been mounted to cover the third roof bay region 12.

[0085] In the example embodiment of figure 2, the roof is a gambrel-type roof, but a keder roof system is equally useful for other types of roof designs, such as flat roof, leaning roofs, gable-type roofs, etc.

[0086] The roof has a modular structure, because the roof support structure 1 is made of a plurality of parts that are temporarily connected. For example, each of the roof support beams 2-5 may be made of a set of straight beam segments and a set of curved beam segments that are interconnected using for example clamping connection or positive locking. Similarly, the brazing elements and / or ledgers 6 are also separate parts that are temporarily connected to the roof support beams.

[0087] Consequently, depending on the construction of the modular framework, the roof free span width 7 and roof height 8 of the final roof may vary a lot. For example, the roof free span width 7 may be in the range of 5 - 50 metres, or more, and roof height, as measured from the vertical support surface at the first or second eave to the roof ridge, may be in the range of 0-30 metres, or more.

[0088] Figure 3A schematically shows a side view of for example the first roof support beam 2 of figure 1A, wherein figure 3B shows a close-up side view of a curved portion of the first roof support beam 2, and figure 3C show a close-up side view of a straight portion of the first roof support beam 2. The roof support beam 2 of figure 3A is standing on a horizontal support surface.

[0089] Figure 4 shows a perspective overview of for example the first roof support beam 2 in a curved portion thereof. The roof support beams 2-5 may have various structure, composition and design. One particularly attractive design of the roof support beam 2-5 is in form of a lattice beam, lattice girder or truss beam, due to their high structural strength combined with low weigh. Such lattice girder or truss beams may be manufactured using steel, aluminium, or other types of metal. A lattice girder or truss beam, sometimes also referred to as an open web girder, typically comprises a top chord 59, a bottom chord 60 and a plurality of relatively straight structural elements 61 , also referred to as intermediate connecting diagonal members, for interconnecting the top and bottom chord and forming an essentially triangulated system.

[0090] In particular, by providing the roof support beam 2 in form of a lattice beam having top and bottom chords 59, 60 made from steel tubes with 48.3 mm outer diameter, according the European Standard EN 12810-1 for scaffolds products, the lattice beam is compatible for use as a scaffold part, i.e. for building fagade scaffolds or the like. The centre to centre distance of the top and bottom chords 59, 60 of the lattice beam may for example be 500 mm for further improved compatibility with other parts of a scaffold system.

[0091] However, the roof support beam is not limited to these kind of support beams, and may alternatively have a more solid design and being made of fibre-reinforced polymeric material and / or or a concrete material, or the like.

[0092] With reference to figure 3A-3C and figure 4, according to some example embodiments, the first roof support beam 2 carries a detachable modular keder rail 30 that has a first keder groove 31 . The roof support beam 2 may be any type of roof support beam, for example a multi-piece modular roof support beam or a single-piece rigid roof support beam, and not necessarily a dedicated keder roof support beam having integrated keder grooves. Consequently, the scaffolding and / or keder roof supplier can use an already available roof support beam as load carrying member, or nearly any type of roof support beam, thereby reducing cost and complexity when deciding to start utilising a keder roof system.

[0093] In addition, if for example the first keder groove of the modular keder rail 30 becomes damaged, it is not necessary to replace the entire roof support beam, but replacement of the relevant rail segments of the modular keder rail 30 is sufficient. Since the detachable modular keder rail 30 is carried by the rigid and load supporting first roof support beam 2, the modular keder rail 30 may be designed without any substantial requirement in terms of load capacity. In other words, the modular keder rail 30 may be designed with relatively low rigidity for saving weight and cost.

[0094] The first keder groove 31 may be integrally formed in the modular keder rail 30, for example by manufacturing the modular keder rail 30 as a cost-efficient aluminium profile in an aluminium extrusion process, or as a cost-efficient polymeric material profile in a polymeric material extrusion process.

[0095] The modular keder rail 30 may be made in one piece or composed of a plurality of parts and / or materials.

[0096] The first keder groove 31 clearly extends in parallel with the direction of elongation of the first rail structure 30.

[0097] According to some example embodiments, the modular keder rail 30 comprises a plurality of rail holders 35 for detachable fastening the modular keder rail 30 to the first roof support beam 2. The rail holder 35 may for example be fastened to, or integrally formed within, the modular keder rail 30, and configured for enabling quick and secure temporary attachment of the modular keder rail 30 to the first roof support beam 2 by a roof builder 24. The quick and secure temporary attachment may for example be accomplished be means of a rail holder foot 9 that includes a clamping member or a positive locking device using for example pin and hole attachment.

[0098] However, the keder roof system according to the disclosure is not limited to a separate or detachable modular keder rail 30. In other words, in some example embodiments, the modular keder rail 30 may be integrated in, or permanently attached to, the first roof support beam 2. For example, the first roof support beam 2 may include an integrally formed first keder groove 31 , or the modular keder rail 30 having the first keder groove 31 may be permanently attached, for example by welding or the like, to the first roof support beam 2.

[0099] With reference to figure 2, the mounting of the first tarpaulin 15 on the modular keder rail 30 is for example performed by a roof builder inserting an end of the first keder chord of the first tarpaulin 15 into an end of the first keder groove 31 of the modular keder rail 30. This may for example be performed manually. Thereafter, a pulling force is exerted on the first tarpaulin 15 for sliding the first keder chord into the first keder groove 31 until a desired position is attained. The pulling force is for example exerted on the first tarpaulin 15 via the pull rope 14 of the first shuttle arrangement 40.

[0100] Figure 5A shows schematically a side view of an assembled first roof support beam 2 having a modular keder rail 30 temporarily fastened on an upper side of first roof support beam 2, as well as a further elongated modular keder rail 62 temporarily fastened on an upper side of a second roof support beam 3.

[0101] Figure 5B shows schematically a side view of an exploded view of the first roof support beam 2 of figure 5A. Figure 5B thus shows an example embodiment of the modular composition of the first roof support beam and the modular keder rail 30.

[0102] In other words, the first roof support beam 2 may be composed of a plurality of support beam elements 63 that may have various forms, such as straight element and curved elements, and the desired first roof support beam 2 may thus be built by assembling and mutually fastening an appropriate set of support beam elements 63.

[0103] Similarly, the modular keder rail 30 is composed of a plurality of elongated rail segments 64 that are connected end to end, in continuation with each other, to jointly form the modular keder rail 30.

[0104] In the example embodiment of figure 5B, the modular keder rail 30 is composed of a curved elongated rail segment 64 and a plurality of straight elongated rail segments 64.

[0105] The straight elongated rail segments 64 of the modular keder rail 30 may be identical to each other, or with varying length.

[0106] At least one elongated rail segment 64 of the elongated modular keder rail 30 comprises a rail holder 35, in particular two, three or four rail holders 35, for detachable fastening the elongated rail segment 64 to a first roof support beam 2.

[0107] With reference to figure 5A, each rail holder 35 has a foot 9 for detachable fastening the elongated rail segment 64 on the first roof support beam 2, and a contact surface of the foot 9, i.e. the surface of the foot that is in contact with and load-carrying relative to the first roof support beam, is located spaced apart from the first keder groove 31 with a distance 65 of at least 5 cm, specifically at least 25 cm, and more specifically within a range of 5 - 150 cm, specifically 15 - 50 cm, as measured in a direction opposite to the direction of elongation of the elongated rail segment. This reduces the risk of damages and / or wear to the tarpaulins caused be interference with the roof support structure 1 .

[0108] The foot 9 may be detachably fastened to the underlying roof support beam by any type of attachment, such as by means of one or more locking pins 68 of the foot 9 being inserted into associated locking holes 67 or recesses of the roof support beam, or by means of clamping, or the like.

[0109] The modular keder rail 30 is described more in detail below with reference to figure 6 - 10, which shows different views of an example embodiment of the modular keder rail 30 according to the present disclosure.

[0110] Specifically, figure 6 shows a perspective view of the modular keder rail 30 having two connected rail segments 64. Figure 7 shows a perspective view of a single elongated rail segment 64 in form of the first structural member 21 . Figure 8 shows a magnification of the first end 28 of the first structural member 21 of figure 7. Figure 9A and 9B show perspective views of the first and second elongated structural member 21 , 22 in a disconnected and connected state, respectively, and figure 10 shows an end view of the first end 28 of the first structural member 21 .

[0111] The rail segments 64 of the modular keder rail 30 are illustrated in an upside down orientation in figures 6-9B and 13, i.e. having a bottom side of the rail segments 64 of the modular keder rail 30 facing upwards, for enabling a better illustration of a rail segment alignment mechanism, as will be described in detail herein below.

[0112] With reference to figure 6, the modular keder rail 30 is composed from a plurality of individual elongated rail segments 64 that are connected end to end, in continuation with each other, to jointly form the modular keder rail 30. The plurality of elongated rail segments 64 are also referred to as elongated structural members 21 , 22 for indicating that the form and shape of the rail segments 64 can vary to a large degree, e.g. from a relatively small rail to a large roof support beam, or the like. In the described example embodiment, the first and second elongated structural members 21 , 22 are made of extruded hollow aluminium profile. Consequently, the modular keder rail 30 according to the example embodiment of figure 6 comprises at least a first elongated structural member 21 and a second elongated structural member 22, wherein each of said first and second elongated structural members 21 , 22 has a first end 28, a second end 29, and a plurality of keder grooves 31-34 extending along the entire length of the first structural member 21.

[0113] The keder grooves 31-34 have an access opening extending along the length of the grooves towards the outside of the structural member 21 , 22,

[0114] For avoiding leakage at the connection area between the first and second elongated structural members 21 , 22, a first gasket arrangement 36 is provided between the first ends 28 of the first and second structural members 21 , 22. The first gasket arrangement 36 is preferably designed such that stops rain water or the like from entering at the abutment joint between the first and second structural members 21 , 22, as well as preventing rain water that has entered any of the keder grooves 31-34 from leaking at said abutment joint.

[0115] This task may be complicated by the fact that the first and second structural members 21 , 22 may exposed to a small degree of relative motion due to for example bending torque of the modular keder rail. Such bending motion typically occurs with increased load of the modular keder rail, in particular when being used for providing a roof structure. The load can vary slowly over time due to for example snow, but also more quickly due to gust of wind.

[0116] A further complicating aspect is that the first and second structural members 21 , 22 in some implementations are not directly mutually connected to each other, but possibly primarily via a separate load carrying support beam, onto which the first and second structural members 21 , 22 are attached. Such a situation is schematically illustrated in figure 5A, wherein the individual elongated rail segments 64 may be simply located next to each other and attached to the underlying roof support beam 2 via the rail holders 35. Consequently, varying vertical load on the roof support beam 2 may then result in varying compression load at the mutual contact surface between the first and second structural members 21 , 22, and / or a varying gap size between the end faces of the first and second structural members 21 , 22.

[0117] The present disclosure provides an improved gasket arrangement that is designed to better handle relative motion between the first and second structural members 21 , 22 with maintained leakproofness, as well as providing reduced risk that the gasket arrangement becomes deformed in a way that causes the gasket arrangement to enter into the keder groove(s) and interfere with the keder chord(s). This is solved, as schematically illustrated in figures 9A-9B and 11A-11 D, by providing each of the first and second elongated structural members 21 , 22 with a first recess 37a, 37b located at a first end face 28 of the structural members 21 , 22, and by locating the first gasket arrangement 36 in said first recesses 37a, 37b, such that said first gasket arrangement 36 becomes compressed in a longitudinal direction 76 of the structural members 21 , 22 between the first and second structural members 21 , 22.

[0118] Thereby, a more protected installation of the first gasket arrangement is provided, because the first recesses 37a, 37b enables the first gasket arrangement 36 to avoid damage due to over-compression and / or cutting during for example bending motion of the modular keder rail 30.

[0119] Moreover, the first recesses 37a, 37b also enables the first gasket arrangement 36 to better maintain is natural shape and form and avoiding being squeezed out in a lateral direction into the keder grooves 31-34 of the first and second structural members 21 , 22, and thereby obstructing the sliding motion of the keder chord within said the keder grooves 31-34.

[0120] Consequently, with reference to for example figures 6 - 10, the present disclosure relates to a modular keder rail 30 comprising: a first elongated structural member 21 having a keder groove 31-34 extending along the length of the first structural member 21 and a first recess 37a located at a first end face of the first structural member 21 ; a second elongated structural member 22 having a keder groove 31-34 extending along the length of the second structural member 22 and a first recess 37b located at a first end face of the second structural member 22; and a first gasket arrangement 36; wherein the first and second elongated structural members 21 , 22 are configured for being arranged next to each other, such that the first recesses 37a, 37b of the first and second structural members 21 , 22 faces each other; and wherein the first gasket arrangement 36 is configured to be located in the first recesses 37a, 37b and to be compressed between the first and second structural members 21 , 22 for providing a weatherproof seal between the first and second structural members 21 , 22. The first and second elongated structural members may be straight or curved structural members, being made primarily of metal, in particular aluminium.

[0121] The first recess 37a of the first elongated structural member 21 is facing the first recess 37b of the second elongated structural member 22 in a state when the first and second elongated structural members 21 ,22 are arranged to form continuous aligned elongated modular keder rail 30.

[0122] The first gasket arrangement 36 is configured to be compressed in the longitudinal direction of the first and second structural members 21 , 22 between a bottom surface of the first recess 37a of the first structural member 21 and a bottom surface of the first recess 37b of the second structural member 22.

[0123] In the example embodiments of figure 6 - 11 D, the first gasket arrangement 36 is a multi-piece first gasket arrangement, i.e. the first gasket arrangement 36 is composed of two separate gasket parts 36a, 36b that are pressed together between the first and second structural members 21 , 22. This is particularly clearly illustrated in figures 11 A, wherein a first part 36a of the first gasket arrangement 36 is attached in the first recess 37a of the first structural member 21 , a second part 36b of the first gasket arrangement 36 is attached in the first recess 37b of the second structural member 22, and wherein the first and second structural members 21 , 22 subsequently are arranged coaxially next to each other, as illustrated in figure 11 B-11C, such that the first and second parts 36a, 36b of the first gasket arrangement 36 becomes compressed in a longitudinal direction 76 of the structural members 21 , 22 between the first and second structural members 21 , 22 to provide a weatherproof seal between the first and second structural members 21 , 22.

[0124] In other words, the first gasket arrangement 36 may be a dual-piece gasket arrangement having a first part 36a configured to be located in the first recess 37a and a second part 36b configured to be located in the second recess 37b, and wherein the first and second parts 36a, 36b are configured to abut each other in an assembled state of the first and second structural members 21 , 22, in particular when a relatively strong compression force is applied to the first and second structural members 21 , 22.

[0125] The assembled state of the first and second structural members 21 , 22 refers the state in which the first and second structural members 21 , 22 are arranged to provide a continuous modular keder rail. This may for example occur when the first and second structural members 21 , 22 are arranged next to each other while being connected to an underlying roof support beam, as schematically illustrated in figures 1A-5B, or when the first and second structural members 21 , 22 are directly connected to each other via a suitable connection mechanism.

[0126] The size, shape and elastic material of the first and second parts 36a, 36b of the first gasket arrangement 36, as well as the size and shape of the first recesses 37a, 37b of the first and second structural members 21 , 22, may be selected such first and second parts 36a, 36b of the first gasket arrangement 36 protrudes out from the first recesses 37a, 37b a certain distance 44 in the longitudinal direction of the modular keder rail 30, in a non-compressed stated of the first gasket arrangement 36, i.e. before pressing the first and second structural members 21 , 22 together.

[0127] The protruding distance 44 may for example be in the range of 1 - 10 millimetres. Consequently, in some example embodiments, the protruding distance 44 may be equal to the thickness 53 of the first part 36a of the gasket arrangement 36, in its natural shape, minus the depth 54 of the first recess 37a.

[0128] Similarly, the size, shape and elastic material of the first and second parts 36a, 36b of the first gasket arrangement 36, as well as the size and shape of the first recesses 37a, 37b of the first and second structural members 21 , 22, may be selected such that the first and second parts 36a, 36b of the first gasket arrangement 36 may be compressed to be essentially flush with an abutment surface 45,73 of the first and second structural members 21 , 22, in an assembled state of the first and second structural members 21 , 22, in particular when a relatively strong compression force is applied to the first and second structural members 21 , 22..

[0129] In other words, the first and second parts 36a, 36b of the first gasket arrangement 36 are configured to protrude out from the first recesses 37a, 37b of the first and second elongated structural members 21 , 22, respectively, in a longitudinal direction of the first elongated structural member in an uncompressed state of the first gasket arrangement 36, and to protrude out less from the first recesses 37a, 37b, or to be flush with an abutment surface 45,73 of the first and second elongated structural members 21 , 22, respectively, in a compressed state of the first gasket arrangement 36. Others said, each of the first and second elongated structural members may have an integrally formed abutment surface, and said abutment surfaces may be configured to abut each other to provide a gasket compression limiting arrangement for avoiding over compression of the first gasket arrangement in a mutually assembled state of the first and second elongated structural members.

[0130] Consequently, the size, shape and elastic material of the first and second parts 36a, 36b of the first gasket arrangement 36, as well as the size and shape of the first recesses 37a, 37b of the first and second structural members 21 , 22, may be selected such that the risk for over compression of the first gasket arrangement is very low, because said abutment surface 45,73 of the first and second structural members 21 , 22 is arranged to prevent further compression of the first gasket arrangement 36.

[0131] Furthermore, with reference to figure 11C and 9B, the size, shape and elastic material of the first and second parts 36a, 36b of the first gasket arrangement 36, as well as the size and shape of the first recesses 37a, 37b of the first and second structural members 21 , 22, may be selected such that first gasket arrangement 36 provides an adequate sealing of the connection area between the first and second structural members 21 , 22 also when the first and second structural members 21 , 22 are slightly spaced apart from each other a certain distance 46 for any reason, as long as the spacing distance 46 is smaller than the accumulated protruding distance 44 of the first and second parts 36a, 36b of the first gasket arrangement 36 in a natural, uncompressed state, i.e. as long as the first and second parts 36a, 36b of the gasket arrangement 36 are at least partly compressed in the longitudinal direction. This may be particular useful in circumstances when the first and second structural members 21 , 22 are not directly attached to each other, and the gasket arrangement must ensure proper sealing also during and after certain relative movement between the first and second structural members 21 , 22.

[0132] Moreover, with reference to figure 11 D, the size, shape and elastic material of the first and second parts 36a, 36b of the first gasket arrangement 36, as well as the size and shape of the first recesses 37a, 37b of the first and second structural members 21 , 22, may be selected such that first gasket arrangement 36 provides an adequate sealing of the connection area between the first and second structural members 21 , 22 also when the first and second structural members 21 , 22 have a slightly different angular orientation, i.e. they are not perfectly aligned as indicated by angle 72, as long as a maximal spacing distance 46 between the abutment surfaces 45,73 is not larger than said accumulated protruding distance 44 of the first and second parts 36a, 36b of the first gasket arrangement 36. This may be useful in circumstances of heavy loading or large deflection of the first and second structural members 21 , 22.

[0133] In figure 7 a first part 36a of the first gasket arrangement 36 is visible at the first end 28 of the first structural member 21 , together with a first alignment member 38a in form of a first cylindrical pin, as will be described more in detail herein below. The first structural member 21 comprises a mounting track 42 for attachment of rail holders 35 to the structural member 21 .

[0134] Figure 8 shows a magnification of the first end 28 of the first structural member 21 including the first part 36a of the first gasket arrangement 36 fastened in the first recess 37a by means of a gasket fastener 39, the first alignment member 38a, the first to fourth keder grooves 31-34, a fastener 40 for detachably mounting a support member (not visible in figure 8) within the hollow profile, an adjustment fastener 41 for enabling position adjustment of the first alignment member 38a and an associated opening 43 in the wall of the first structural member 21 for enabling adjustment motion of the adjustment fastener 41. The opening 43 is normally facing downwards after final installation of the modular keder rail 30, such that rain water is prevented from entering into the first structural member 21 through the opening 43.

[0135] Figure 9A shows the first and second structural members 21 , 22 in a disconnected state, wherein the first alignment member 38a of each structural member 21 , 22 is set in a protruding position, i.e. the first alignment member 38a of each structural member 21 , 22 protrudes outwards in the longitudinal direction of the structural member 21 , 22 through the first gasket arrangement 36. Hence, the first gasket arrangement may have dedicated holes that enables the first alignment member 38a to extend forwards beyond the first gasket arrangement 36.

[0136] Figure 9B shows the first and second structural members 21 , 22 in a connected state, wherein the first alignment member 38a, 38b of each structural member 21 , 22 is engaged a hole of the oppositely facing structural member 21 , 22. As mentioned above, the first gasket arrangement 36 is here pressed together to form a weatherproof seal, but the abutment surfaces 45,73 of the first and second structural members 21 , 22 are here not in mutual contact. However, in case of a strong compression force or bending force, as illustrated in figure 11 B, the first and second structural members 21 , 22 may be pushed further towards each other, such that said abutment surfaces 45,73 come in mutual contact, while the first gasket arrangement 36 is well protected in the first recesses 37a, 37b, albeit more compressed, and the first gasket arrangement 36 continues to provide a weatherproof sealing of the connection area of the first and second structural members 21 , 22 also in this state.

[0137] Figure 10 shows an end view of the first elongated structural member 21 , wherein the metal profile of the first elongated structural member 21 defines an interior side wall surface 57 that completely encloses the first gasket arrangement 36 in a plane that is perpendicular to the longitudinal direction of the structural member 21 .

[0138] In other words, each of the first and second elongated structural members 21 , 22 have hollow and closed profiles.

[0139] Moreover, each of the first and second elongated structural members has a hollow profile with an elongated side wall, wherein an end face of the side wall of the first and second elongated structural members form said abutment surfaces.

[0140] As illustrated in figure 10, the first gasket arrangement 36 may be provided with a peripheral natural shape, i.e. non-compressed shape, that corresponds to an internal shape of first and second structural members 21 , 22.

[0141] This enables improved sealing performance of the first gasket arrangement 36, because the first gasket arrangement 36 will then, upon compression in the longitudinal direction, expand laterally to come in sealing contact around the entire inner periphery of the of first structural member 21 , and thus contribute to an improved sealing capacity.

[0142] Others said, the first gasket arrangement is arranged around the keder grooves of the first and second structural members for preventing leakage from keder grooves into the gap between first and second structural members.

[0143] Figure 10 also shows that the first gasket arrangement 36 may have first and second through holes 56a, 58a for enabling lead-through for the first alignment members 38a, 38b, as well as a hole 74 for the gasket fastener 39. Figures 12A-B show schematically an alternative example embodiment of the modular keder rail, wherein the first gasket arrangement 36 is a single-piece gasket that is configured to be located in the first recesses 37a, 37b of both the first and second structural members 21 , 22, in an assembled state of the first and second structural members 21 , 22.

[0144] Specifically, in figure 12A, which shows the first and second structural members 21 , 22 before being brought together, the single-piece gasket is located in the first recess 37a of the first structural member 21 only, while the first recess 37b of the second structural member 22 is empty.

[0145] Figure 12B shows the modular keder rail after assembly, i.e. after assembly of the first and second structural members 21 , 22. In this view, the single-piece gasket is located in the first recesses 37a, 37b of both the first and second structural members 21 , 22, and compressed in the longitudinal direction.

[0146] Figure 13 shows an exploded view of the first end of the first structural member 21 , which clearly shows the hollow metal profile form of the first structural member 21 , including the first alignment member 38a, support member 49a and a first part 36a of the first gasket arrangement 36. Figure 14A shows a perspective front view of an assembly including the first alignment member 38a, the support member 49a and the first part 36a of the first gasket arrangement 36, and figure 14B shows a perspective rear view of said assembly.

[0147] The first alignment member 38a is made from a cylindrical pin that is attachable to the first structural member 21 via a holding device 48. Specifically, the adjustment fastener is threadingly attached to the holding device 48 through an elongated opening 43 in the bottom side of the structural member 21 , thereby enabling selective attachment of the first alignment member 38a at various position in the longitudinal direction 76.

[0148] After assembly of the first alignment member 38a, the support member 49a is fastened within the hollow profile of the first structural member 21. In this example embodiment, the fastening position of the support member 49a is determined by the location of the attachment hole 50 in the first structural member 21 , the threaded hole 51 in the support member 49a, and the support member fasteners 40. In other words, each of the first and second elongated structural members 21 , 22 has a hollow profile with an elongated side wall, wherein a support member 49a is fastened within the hollow profile of the first structural member 21 inwardly offset from a first end face of the first structural member 21 , wherein a support member 49b is fastened within the hollow profile of the second structural member 22 inwardly offset from a first end face of the second structural member 22, wherein the first recess 37a of the first structural member 21 is defined by the support member 49a and the interior side wall surface 57 of the first structural member 21 , and wherein the first recess 37b of the second structural member 22 is defined by the support member 49b and the interior side wall surface 57 of the second structural member 22.

[0149] In other words, each first recess 37a, 37b is fully enclosed by the side wall 57 of the associated hollow profile, thereby effectively preventing the first gasket arrangement 36 from entering into keder grooves and causing problems.

[0150] As a result, the first gasket arrangement is not located between abutment surfaces 45,73 of the profiles of the first and second structural members 21 , 22, thereby effectively avoiding damage to first gasket arrangement due to over compression, and avoiding that the first gasket arrangement obstructs motion of the keder chord in the keder groove.

[0151] A forward facing substantially flat surface of the support members 49a, 49b defines a bottom surface 52 of the first recesses 37a, 37b. The support members 49a, 49b are fastened at a location such that the bottom surfaces 52 of the first recesses 37a, 37b are inwardly offset from the first end faces of the first and second structural members 21 ,22, i.e. offset from the forwards facing abutment surfaces 45,73 of the first and second structural members 21 , 22, respectively.

[0152] In other words, each of the first and second elongated structural members 21 , 22 has an abutment surface 45,73, in particular an integrally formed abutment surface 45,73, wherein said abutment surfaces 45,73 are configured to face and potentially abut each other in an assembled state of the first and second elongated structural members 21 , 22, in particular during a bending situation of the first and second elongated structural members 21 , 22, wherein the bottom surface of the first recess 37a of the first structural member is inwardly offset, i.e. inwardly displaced, from the abutment surface 45 of the first structural member 21 , and wherein the bottom surface of the first recess 37b of the second structural member 22 is inwardly offset, i.e. inwardly displaced, from the abutment surface 73 of the second structural member 22.

[0153] The term inwardly displaced refers herein to a direction towards a centre of the relevant structural member, in the longitudinal direction thereof.

[0154] The first recess 37a is defined by the interior walls of the structural member 21 , in the lateral direction 77 and height direction 78.

[0155] The support member 49a of the first structural member 21 is provided with a first through hole 55a for enabling the first alignment member 38a to be installed rear of the support member 49a while simultaneously extending forwards through the support member 49a for engagement with an oppositely located support member 49b of the second structural member 22.

[0156] Similarly, the support member 49b of the second structural member 22 is provided with a first through hole 55b for enabling the first alignment member 38b to be installed rear of the support member 49b while simultaneously extending forwards through the support member 49b for engagement with an oppositely located support member 49a of the first structural member 21.

[0157] According to some example embodiments, the support members 49a, 49b are provided with a peripheral shape that corresponds to the internal shape of first and second structural members 21 , 22, respectively. As a result, the first gasket arrangement 36 will provide a good sealing performance, because the first gasket arrangement 36 will then, upon compression in the longitudinal direction, expand primarily laterally for coming in sealing contact around the entire inner periphery of the of first and second structural members 21 , 22, and thus provide an improved sealing capacity.

[0158] In some example embodiments, the support members 49a, 49b have a generally flat shape that is arranged in a plane perpendicular to a longitudinal extension of the first and / or second structural members 21 , 22.

[0159] In showed in figures 11A - 13, and in particular also figure 15, the support members 49a, 49b are removably fastened to the first and second structural members 21 , 22, respectively, by one or more fasteners. Alternatively, the support members 49a, 49b are permanently fastened to the first and second structural members 21 ,22, respectively, such as for example by means of welding, soldering, press-fit, deformation, riveting, or the like.

[0160] According to some example embodiments, the first gasket arrangement 36 has a flat shape that is arranged in a plane perpendicular to a longitudinal extension of the first and second structural members 21 ,22, respectively.

[0161] After assembly of the support member 49a in the first elongated structural member 21 , the first part 36a of the first gasket arrangement 36 is installed in the first recess 37a. Alternatively, the first part 36a of the first gasket arrangement 36 is first attached to the support member 49a and the combined support member 49a and first part 36a is subsequently installed in the first structural member 21 .

[0162] The first part 36a of the first gasket arrangement 36 may be attached to the support member 49a by means of gasket fastener 39, such a threaded fastener that is engaging a threaded hole in the support member 49a, as schematically illustrated in figure 15.

[0163] Also the first gasket arrangement 36 is provided with a first through hole 56a for enabling the first alignment member 38a to be installed rear of the support member 49a while simultaneously extending forwards through the first gasket arrangement 36 for engagement with an oppositely located support member 49b of the second structural member 22.

[0164] Figures 7-10 and 13-14B schematically indicates that the first end of both the first and the second structural members 21 , 22 of the modular keder rail 30 includes has a first alignment member 38a, 38b that can be moved from a withdrawn to a protruding position. There is thus a certain level of redundancy in term of alignment members 38, which is convenient in case of malfunctioning or damage of one of the first alignment member 38a, 38b. In addition, two first alignment members 38a, 38b arranged side-by-side ensures mutual rotational locking of the first and the second structural members 21 , 22, thereby ensuring proper alignment of the first to fourth keder grooves 31-34 in the transition areas between neighbouring structural members 21 , 22. This is also confirmed by figures 16 and 17, wherein figure 16 shows a cross-sectional rear side of the support member 49a of the first structural member 21 , in a plane that is perpendicular to the longitudinal direction, including a rear end of the first alignment member 38a of the first structural member 21 , as well as a front end of the first alignment member 38b of the second structural member 22. Figure 17 shows a cross- sectional view through a coupling between the first and second structural members 21 , 22, in a cross-sectional plane that is parallel to the longitudinal direction, including the first alignment member 38a of the first structural member 21 , as well as the first alignment member 38b of the second structural member 22.

[0165] Consequently, the first elongated structural member 21 has a first alignment member 38a protruding out from the first end face 45 of the first structural member 21 , in the longitudinal direction of the first elongated structural member, and the second elongated structural member has a corresponding depression or hole located at the first end face of the second structural member. Furthermore, the first alignment member 38a is configured to engage the depression or hole for ensuring accurate mutual alignment of the first and second structural members 21 , 22 in a state when the first and second elongated structural members 21 , 22 are assembled to form continuous elongated modular keder rail.

[0166] The corresponding depression or hole of the second structural member 22 is provided in the support member 49b of the second structural member 22.

[0167] The first alignment member 38a is linearly slidably moveable in the longitudinal direction of the first structural member 21 .

[0168] The first alignment member 38a is for example a cylindrical pin, and the corresponding depression or hole located at the first end face of the second structural member 22 is configured to receive an end portion of said pin for ensuring accurate mutual alignment of the first and second structural members 21 , 22. A cylindrical pin enables cost-effective manufacturing thereof.

[0169] As schematically indicated in figure 9A, 16 and 17, also the second elongated structural member has a first alignment member 38b protruding out from the first end face of the second structural member 22, in the longitudinal direction of the second elongated structural member 22. Consequently, also the first elongated structural member 21 a has a corresponding depression or hole located at the first end face of the first structural member 21 , wherein the first alignment member 38b of the second structural member 22 is configured to engage the depression or hole of the first structural member for ensuring accurate mutual alignment of the first and second structural members 21 , 22.

[0170] According to some example embodiments, the first alignment member 38a of the first structural member and the corresponding depression or hole of the first structural member 21 are located side by side, displaced from each other, and preferably centred around a centre of the first structural member 21 .

[0171] The two first alignment members 38 ensures an improved mutual angular locking of the first and second structural members 21 , 22.

[0172] The first alignments members 38 of the first and second structural members are individual alignments members 38 that can be actuated individually from each other.

[0173] According to an alternative example embodiment, the first end of the first structural member 21 may include a first alignment member 38a while being free from the corresponding depression or hole, and the first end of the second structural member 22 may include a the corresponding depression or hole while being free from a first alignment member. In such an embodiment, the first alignment member 38a of the first end of the first structural member 21 may be located in a centre of the first end of the first structural member 21.

[0174] Figures 18A-C show schematically a connection sequence of a first and second structural member 21 , 22 of the modular keder rail 30. In figure 1 , the first and second structural members 21 , 22 are arranged coaxially, while the first alignment members 38 are set in a rear position, i.e. a non-protruding position. Thereafter, the first and second structural members 21 , 22 are moved towards each other mutually fastened, directly or indirectly, for providing a water-tight sealing connection between the first and second structural members 21 , 22. Thereafter, the first alignment members 38 are pushed forwards, i.e. towards each other in the longitudinal direction, for providing reliable and correct alignment between the first and second structural members 21 , 22. Each of the first alignment members 38a, 38b is thus moveable between a first position in which the first alignment members 38a, 38b protrude out from the first end face of the first and second structural members 21 , 22, as for example illustrated in figure 17 and 18C, and a second position in which the first alignment member 38a does not protrude out from the first end face of the first structural member 21 , as for example illustrated in figure 18A.

[0175] A further advantage with the moveable first alignment members 38a, 38b is that individual keder rail segments may be removed and / or replaced after a complete installation of the modular keder rail on for example a roof. This is performed by moving each of the first alignment members 38a, 38b rearward to said second position in which the first alignment members 38a, 38b do not protrude out from the first end face of the first and second structural members 21 , 22, and by moving each of the corresponding alignment members at the second end 29 of the first structural member 21 rearwards to said second position. Thereafter, the individual keder rail segment associated with the first structural member 21 may be detached from the modular keder rail by moving of the keder rail segment 64 in a direction perpendicular to the longitudinal direction 76. Re-assembly of the individual keder rail segment 64 may be performed in same manner but in opposite order. As a result, individual keder rail segments 64 may be temporarily removed for any reasons, and thereafter re-inserted, without disassembly of the remaining neighbouring rail segments 64 of the modular keder rail 30.

[0176] The present disclosure also relates to a modular keder roof support beam comprising at least one lattice roof support beam having an upper chord, a lower chord, and a plurality of intermediate connecting diagonal members; and the modular keder rail as described above, wherein the structural members of the modular keder rail are attached to the upper chord of the at least one lattice roof support beam, and wherein the structural members are connected end to end to jointly form a continuous elongated modular keder rail. Such a modular keder roof support beam is schematically illustrated in figures 1A, 2, 3A and 5A-5B.

[0177] According to an alternative example embodiment, as schematically illustrated in figures 19A-19B, modular keder roof support beam comprises a plurality of lattice roof support beam segments 64, each having an top chord 59, a bottom chord 60, and a plurality of intermediate connecting diagonal members 61 ; wherein the plurality of lattice roof support beam segments 64 are connected end to end to jointly form a continuous elongated modular keder roof support beam; wherein the modular keder rail 30 as described above forms the upper chord 59 of the modular keder roof support beam. Figure 19A shows two segments 64 of the modular keder roof support beam in a disconnected state, and figure 19B shows two segments 64 of the modular keder roof support beam in a connected state.

[0178] With reference to all figures disclosed herein, the first gasket arrangement may be made of elastic material and may be removably fastened to one or both of the support members 49a, 49b by one or more fasteners.

[0179] Moreover, the first and second structural members may be made of extruded metal profiles, in particular aluminium metal profiles.

[0180] According to some example embodiments, the support members 49a, 49b are made of a metal plate, in particular aluminium metal plate. This may for example be accomplished by laser cutting, water-jet cutting, plasma cutting, etc.

[0181] The present disclosure also relates to a single first rail segment 64 of a modular keder rail 30, for example according to the embodiment illustrated in figure 7. The first rail segment 64 comprises: a first elongated structural member 21 having a first end 28 with a first end face, a second end 29 with a second end face, a keder groove 31 , 32 extending along the length of the first structural member 21 , a first recess 37a located at the first end face; a second recess 70 located at the second end face; a first gasket arrangement 36 configured to be located in the first recess 37a; and a second gasket arrangement 71 configured to be located in the second recess 70; wherein the first rail segment 21 is configured to be arranged next to a second rail segment 22 and a third rail segment 23 to form continuous elongated modular keder rail 30, and wherein the first gasket arrangement 36 is configured to be compressed between a bottom surface of the first recess 37a and the second rail segment 22 for providing a weatherproof seal between the first and second rail segments 21 , 22, wherein the second gasket arrangement 71 is configured to be compressed between a bottom surface of the second recess 70 and the third rail segment 23 for providing a weatherproof seal between the first and third rail segments 21 , 23. The first and second gasket arrangements 36, 71 are preferably provided with the same design for simplifying use and reducing the number of unique components of the keder rail.

[0182] Similarly, the second recess 70 is preferably provided by means of a support member that is identical with the support member 49a of the first recess 37a for simplifying use and reducing the number of unique components of the keder rail.

[0183] The modular keder rail according to the present disclosure will sometimes be required to have a relatively large length for enabling use as roof support beam having a large beam span. Consequently, the modular keder rail of for example figure 6 may include more than a first and second elongated structural members 21 , 22. For example, with reference to figure 20, the modular keder rail 30 may, in addition to the first and second structural members 21 , 22 and associated first recesses 37a, 37b and first gasket arrangement 36 described with reference to figure 6, include a third elongated structural member 23 having a first end 28 a second end 29, a keder groove 31 , 32 extending along the length of the third structural member. Moreover, the modular keder rail may further include a second gasket arrangement 71 ; wherein the first elongated structural member has second recess 70 located at a second end face of the first structural member 21 , wherein the third elongated structural member 23 has a first recess 37c located at a first end face of the third structural member 23, wherein the first, second and third elongated structural members 21 ,22,23 are configured for being arranged next to each other, such that the first recess 37a of the first structural member 21 faces the first recess 37b of the second structural member, and such that the first recess 37c of the third structural member faces the second recess 70 of the first structural member 21. Specifically, the second gasket arrangement 71 is configured to be located in the second recess 70 of the first structural member 21 and in the first recess 37c of the third structural member 23 and to be compressed between the first and third structural members 21 ,23 for providing a weatherproof seal between the first and third structural members 21 ,23.

[0184] The present disclosure may also relates to a method for assembling a modular keder rail 30 having a first and a second elongated structural members 21 , 22, wherein the first elongated structural member 21 has a keder groove 31 , 32 extending along the length of the first structural member 21 and a first recess 37a located at a first end face of the first structural member 21 , wherein the second elongated structural member 22 has a keder groove 31 ,32 extending along the length of the second structural member 22 and a first recess 37b located at a first end face of the second structural member 22. The method comprising a firsts step of positioning a first gasket arrangement (36) in the first recess 37a, 37b of one or both of the first and second structural members 21 , 22; arranging the first and second elongated structural members 21 , 22 next to each other, such that the first recesses 37a, 37b of the first and second structural members 21 , 22 faces each other, and such that the first gasket arrangement 36 becomes compressed in a longitudinal direction of the structural members for providing a weatherproof seal between the first and second structural members 21 , 22.

[0185] The term “tarpaulin” used herein refers to a sheet fabric, such as for example a heavy- duty waterproof or non-waterproof cloth or tarp or similar type of piece of sheet material suitable for being used for protecting or covering of exposed objects or areas. The tarpaulin may be made of plastic material, such as fibre-reinforced polymeric material, such as PVC, polyethylene, polyester, etc. Alternatively, the tarpaulin may be made of natural material, such as canvas, cotton, or the like.

[0186] The example embodiments of the modular keder rails 30, 62 shown in the figures have four keder grooves 31-34, but the modular keder rails 30,62 are not limited to this design, but may alternatively have for example two keder grooves or six keder grooves, or the like. Furthermore, the order of the steps of the method claims should not be interpreted as strictly limiting, but merely one option for performing the method, and the method steps may thus be arranged in another order.

[0187] It will be appreciated that the above description is merely exemplary in nature and is not intended to limit the present disclosure, its application or uses. While specific examples have been described in the specification and illustrated in the drawings, it will be understood by those of ordinary skill in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present disclosure as defined in the claims. Furthermore, modifications may be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the essential scope thereof.

[0188] Therefore, it is intended that the present disclosure not be limited to the particular examples illustrated by the drawings and described in the specification as the best mode presently contemplated for carrying out the teachings of the present disclosure, but that the scope of the present disclosure will include any embodiments falling within the foregoing description and the appended claims. Reference signs mentioned in the claims should not be seen as limiting the extent of the matter protected by the claims, and their sole function is to make claims easier to understand.

[0189] REFERENCE SIGNS

[0190] 1 . Roof support structure 24. Roof builder

[0191] 2. First roof support beam 35 25. Roof width direction 3. Second roof support beam 26. Roof length direction

[0192] 4. Third roof support beam 27. Roof height direction

[0193] 5. Fourth roof support beam 28. First end

[0194] 6. Brazing element 29. Second end

[0195] 7. roof free span width 40 30. Modular keder rail 8. Roof height 31. First keder groove

[0196] 9. Rail holder foot 32. Second keder groove

[0197] 10. First roof bay region 33. Third keder groove

[0198] 11. Second roof bay region 34. Fourth keder groove

[0199] 12. Third roof bay region 45 35. Rail holder 13. Roof ridge region 36. First gasket arrangement

[0200] 14. Pull rope 36a: First gasket part

[0201] 15. First tarpaulin 36b: Second gasket part

[0202] 16. Second tarpaulin 37a: First recess of first structural

[0203] 17. Third tarpaulin 50 member 18. First eave region 37a: First recess of second

[0204] 19. Second eave region structural member

[0205] 20. Intermediate region 37c: First recess of third structural

[0206] 21. First elongated structural member member 55 38a: First alignment member of first 22. Second elongated structural structural member member 38a: First alignment member of first

[0207] 23. Third elongated structural structural member member 39. Gasket fastener 40. Support member fastener 58a. Second through hole of gasket

[0208] 41. Adjustment fastener of first elongated structural member

[0209] 42. Mounting track 58b. Second through hole of gasket

[0210] 43. Opening 35 of second elongated structural

[0211] 44. Protruding distance member

[0212] 45. Abutment surface of first 59. Top chord elongated structural member 60. Bottom chord

[0213] 46. Spacing distance 61. Interconnecting element

[0214] 47. Outer wall 40 62. Further modular keder rail

[0215] 48. Holding device 63. Roof support beam segments

[0216] 49a: Support member of first 64. Elongated rail segment structural member 65. Distance

[0217] 49b: Support member of second 66a. Second through hole of structural member 45 support member of first elongated

[0218] 50. Attachment hole structural member

[0219] 51. Threaded hole 66b. Second through hole of

[0220] 52. Bottom surface support member of second

[0221] 53. Thickness of gasket elongated structural member

[0222] 54. Depth of first recess 50 67. Locking hole

[0223] 55a. First through hole of support 68. Locking pin member of first elongated structural 69. Front surface of gasket member 70. Second recess

[0224] 55b. First through hole of support 71. Second gasket arrangement member of second elongated 55 72. Angle structural member 73. Abutment surface of second

[0225] 56a. First through hole of gasket of elongated structural member first elongated structural 74. Hole for gasket fastener

[0226] 56b. First through hole of gasket of second elongated structural 60 76. Longitudinal direction of member modular keder rail

[0227] 57. Interior side wall surface 77. Lateral direction

[0228] 78. Height direction

Claims

CLAIMS1 . A modular keder rail comprising: a first elongated structural member (21) having a keder groove (31-34) extending along the length of the first elongated structural member (21) and a first recess (37a) located at a first end face of the first elongated structural member (21); a second elongated structural member (22) having a keder groove (31-34) extending along the length of the second elongated structural member (22) and a first recess (37b) located at a first end face of the second elongated structural member (22); and a first gasket arrangement (36); wherein the first and second elongated structural members (21 , 22) are configured for being arranged next to each other, such that the first recesses (37a, 37b) of the first and second elongated structural members (21 , 22) faces each other; and wherein the first gasket arrangement (36) is configured to be located in the first recesses (37a, 37b) and to be compressed between the first and second elongated structural members (21 , 22) for providing a weatherproof seal between the first and second elongated structural members (21 , 22).

2. The modular keder rail according to claim 1 , wherein the first gasket arrangement (36) is a multi-piece gasket arrangement having a first part (36a) configured to be located in the first recess (37a) of the first elongated structural member (21) and a second part (36b) configured to be located in the first recess (37b) of the second elongated structural member (22), and wherein the first and second parts (36a, 36b) are configured to abut each other in an assembled state of the first and second elongated structural members (21 , 22), or wherein the first gasket arrangement (36) is a single-piece gasket arrangement that is configured to be located in the first recess (37a, 37b) of both the first and second elongated structural members (21 , 22).

3. The modular keder rail according to claim 2, wherein the first part (36a) of the first gasket arrangement (36) is configured to protrude out from the first recess (37a) of the first elongated structural member (21) in an uncompressed state of said first part (36a), and wherein the first part (36a) of the first gasket arrangement (36) is configured to protrude out less from the first recess (37a), or to be flush with an abutment surface (45) of the first elongated structural member (21), in a compressed state of said first part (36a).

4. The modular keder rail according to any of the preceding claims, wherein each of the first and second elongated structural members (21, 22) have hollow and closed profiles.

5. The modular keder rail according to any of the preceding claims, wherein the first elongated structural member (21) has an abutment surface (45), wherein the second elongated structural member (22) has an abutment surface (73), and wherein said abutment surfaces (45,73) are configured to abut each other to provide a gasket compression limiting arrangement in an assembled state of the first and second elongated structural members (21, 22).

6. The modular keder rail according to any of the preceding claims, wherein each of the first and second elongated structural members (21 , 22) has an abutment surface (45,73), wherein said abutment surfaces (45,73) are configured to face and potentially abut each other in an assembled state of the first and second elongated structural members (21 , 22), wherein a bottom surface (52) of the first recess (37a) of the first elongated structural member (21) is inwardly offset from the abutment surface (45) of the first elongated structural member (21), and wherein the bottom surface (52) of the first recess (37b) of the second elongated structural member (22) is inwardly offset from the abutment surface (73) of the second elongated structural member (22).

7. The modular keder rail according to any of the preceding claims, wherein each of the first and second elongated structural members (21 , 22) has a hollow profile with an elongated side wall, wherein an end face of the side wall of the first andsecond elongated structural members (21 , 22) form said abutment surfaces (45,73).

8. The modular keder rail according to any of the preceding claims, wherein each of the first and second elongated structural members (21 , 22) has a hollow profile with an elongated side wall, wherein a support member (49a) is fastened within the hollow profile of the first elongated structural member (21) inwardly offset from a first end face of the first elongated structural member (21), wherein a support member (49b) is fastened within the hollow profile of the second elongated structural member (22) inwardly offset from a first end face of the second elongated structural member (22), wherein the first recess (37a) of the first elongated structural member (21) is defined by the support member (49a) and the interior side wall surface of the first elongated structural member (21), and wherein the first recess (37b) of the second elongated structural member (22) is defined by the support member (49b) and the interior side wall surface of the second elongated structural member (22).

9. The modular keder rail according to claim 8, wherein the support members (49a, 49b) form bottom surfaces of the first recesses (37a, 37b).

10. The modular keder rail according to claim 8 or claim 9, wherein the support members (49a, 49b) have a peripheral shape that corresponds to the internal shape of first and second elongated structural members (21 , 22).11 . The modular keder rail according to any of the preceding claims 8 to 10, wherein the support members (49a, 49b) have a flat shape that is arranged in a plane perpendicular to a longitudinal extension of the first and / or second elongated structural members (21 , 22).

12. The modular keder rail according to any of the preceding claims 8 to 11 , wherein the support members (49a, 49b) are removably fastened to the first and second elongated structural members (21 , 22), respectively, by one or more fasteners (40), orwherein the support members (49a, 49b) are permanently fastened to the first and second elongated structural members (21 , 22), respectively.

13. The modular keder rail according to any of the preceding claims, wherein the first gasket arrangement (36) has a peripheral shape that corresponds to the internal shape of first and second elongated structural members (21 , 22).

14. The modular keder rail according to any of the preceding claims, wherein the first gasket arrangement (36) has a flat shape that is arranged in a plane perpendicular to a longitudinal extension of the first and second elongated structural members (21 , 22), respectively.

15. The modular keder rail according to any of the preceding claims, wherein the first gasket arrangement (36) is arranged around the keder groove (31-34) of the first and second elongated structural members (21 , 22) for preventing leakage from keder groove (31-34) into the gap between first and second elongated structural members (21 , 22).

16. The modular keder rail according to any of the preceding claims, wherein the first gasket arrangement (36) is made of elastic material and is removably fastened to one or both of the support members (49a, 49b) by one or more fasteners (39).

17. The modular keder rail according to any of the preceding claims, wherein the first and second elongated structural members (21 , 22) are made of extruded metal profiles.

18. The modular keder rail according to any of the preceding claims, wherein the support members (49a, 49b) are made of a metal plate, in particular aluminium metal plate.

19. The modular keder rail according to any of the preceding claims, wherein the first elongated structural member (21) further has a first alignment member (38a) protruding out from the first end face of the firstelongated structural member (21), in the longitudinal direction of the first elongated structural member (21), wherein the second elongated structural member (22) further has a corresponding depression or hole (58b, 66b) located at the first end face of the second elongated structural member (22), wherein the first alignment member (38a) is configured to engage the depression or hole (58b, 66b) for ensuring accurate mutual alignment of the first and second elongated structural members (21 , 22) in a state when the first and second elongated structural members (21 , 22) are assembled to form continuous elongated modular keder rail (30).

20. The modular keder rail according to claim 19, wherein the first alignment member (38a) is moveable between a first position in which the first alignment member (38a) protrudes out from the first end face of the first elongated structural member (21), and a second position in which the first alignment member (38a) does not protrude out from the first end face of the first elongated structural member (21).21 . The modular keder rail according to any of the preceding claims 19 to 20, wherein the first alignment member (38a) is linearly slidably moveable in the longitudinal direction of the first elongated structural member (21).

22. The modular keder rail according to any of the preceding claims 19 to 21 , wherein the first alignment member (38a) extends through a hole (66b) in the support member (49b) of the second elongated structural member (22).

23. The modular keder rail according to any of the preceding claims 19 to 22, wherein the first alignment member (38a) extends through a hole (56a, 58b) in the first gasket arrangement (36).

24. The modular keder rail according to any of the preceding claims 19 to 23, wherein the corresponding depression or hole (66b) of the second elongated structural member is provided in the support member (49b) of the second elongated structural member (22).

25. The modular keder rail according to any of the preceding claims 19 to 24, wherein the first alignment member (38a) is a cylindrical pin, and wherein the corresponding depression or hole (58b, 66b) located at the first end face of the second elongated structural member (22) is configured to receive an end portion of said pin for ensuring accurate mutual alignment of the first and second elongated structural members (21 , 22).

26. The modular keder rail according to any of the preceding claims 19 to 25, wherein the first alignment member is located in a centre region of the first elongated structural member (21).

27. The modular keder rail according to any of the preceding claims 19 to 25, wherein also the second elongated structural member (22) has a first alignment member (38b) protruding out from the first end face of the second elongated structural member (22), in the longitudinal direction of the second elongated structural member (22), wherein also the first elongated structural member (21) has a corresponding depression or hole (58a, 66a) located at the first end face of the first elongated structural member (21), wherein the first alignment member (38b) of the second elongated structural member (22) is configured to engage the depression or hole (58a, 66a) of the first elongated structural member (21) for ensuring accurate mutual alignment of the first and second elongated structural members (21 , 22), wherein the first alignment member (38a) of the first elongated structural member (21) and the corresponding depression or hole (58a, 66a) of the first elongated structural member (21) are located side by side.

28. The modular keder rail according to any of the preceding claims, further comprising: a third elongated structural member (23) having a keder groove (31-34) extending along the length of the third elongated structural member (23); a second gasket arrangement (71); wherein the first elongated structural member (21) has second recess (70) located at a second end face of the first elongated structural member (21),wherein the third elongated structural member (23) has a first recess (37c) located at a first end face of the third elongated structural member (23), wherein the first, second and third elongated structural members (21 , 22, 23) are configured for being arranged next to each other, such that the first recess (37a) of the first elongated structural member (21) faces the first recess (37b) of the second elongated structural member (22), and such that the first recess (37c) of the third elongated structural member (23) faces the second recess (70) of the first elongated structural member (21); and wherein the second gasket arrangement (71) is configured to be located in the second recess (70) of the first elongated structural member (21) and in the first recess (37c) of the third elongated structural member (23) and to be compressed between the first and third elongated structural members (21 , 23) for providing a weatherproof seal between the first and third elongated structural members (21 , 23).

29. The modular keder rail according to any of the preceding claims, wherein at least one elongated structural member (21 , 22) of the modular keder rail comprises a set of rail holders (35) for detachable fastening of the modular keder rail (30) to a lattice roof support beam.

30. The modular keder rail according to claim 29, wherein the rail holder (35) has a foot (9) for detachable fastening of the modular keder rail (64) on the at least one lattice roof support beam, and wherein a contact surface of the foot is located spaced apart from the keder groove (31-34) with a distance of at least 5 cm, specifically at least 25 cm, and more specifically within a range of 5 - 150 cm.31 . A modular keder roof support beam comprising: at least one lattice roof support beam (2) having an upper chord (59), a lower chord (60), and a plurality of intermediate connecting diagonal members (61); and a modular keder rail (30) according to any of the preceding claims, wherein elongated structural members (21 , 22) of the modular keder rail are attached to the upper chord (59) of the at least one lattice roof support beam (2), and wherein the elongated structural members (21 , 22) are assembled end to end to jointly form a continuous elongated modular keder rail (30); ora plurality of lattice roof support beam segments (63), each having an upper chord (59), a lower chord (60), and a plurality of intermediate connecting diagonal members (61); wherein the plurality of lattice roof support beam segments (63) are connected end to end to jointly form a continuous elongated modular keder roof support beam (2); wherein a modular keder rail according to any of the preceding claims forms the upper chord (59) of the modular keder roof support beam (2).

32. A keder roof comprising a first modular keder rail (30) according to any of the previous claims 1 to 30 arranged parallel with and spaced apart from a second modular keder rail (30) according to any of the previous claims 1 to 30, wherein a tarpaulin is mounted in a keder groove (31-34) of the first and second modular keder rails (30).

33. A method for assembling a modular keder rail having a first and a second elongated structural members (21 , 22), wherein the first elongated structural member (21) has a keder groove (31-34) extending along the length of the first elongated structural member and a first recess (37a) located at a first end face of the first elongated structural member (21), wherein the second elongated structural member (22) has a keder groove (31-34) extending along the length of the second elongated structural member (22) and a first recess (37b) located at a first end face of the second elongated structural member (22), the method comprising: positioning a first gasket arrangement (36) in the first recess (37a, 37b) of one or both of the first and second elongated structural members (21 , 22); arranging the first and second elongated structural members (21 , 22) next to each other, such that the first recesses (37a, 37b) of the first and second elongated structural members (21 , 22) faces each other, and such that the first gasket arrangement (36) is compressed for providing a weatherproof seal between the first and second elongated structural members (21 , 22).

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