US20070125030A1

US20070125030A1 - Support for installations in housing technology and industry

Info

Publication number: US20070125030A1
Application number: US11/607,512
Authority: US
Inventors: Armin Hoffmann; Fritz Hermann; Daniel Rubio
Original assignee: Hilti AG
Current assignee: Hilti AG
Priority date: 2005-12-01
Filing date: 2006-11-30
Publication date: 2007-06-07
Also published as: EP1793058A2; CA2568471A1; MXPA06013739A; EP1793058A3; CN1975060A; DE102005000174A1; JP2007154655A; KR20070057665A

Abstract

A support for installations in the field of housing technology and industry includes first and second chords (12; 62 and 16; 66) each formed of two parallel elongate profiles (13, 17; 63, 67) spaced by a distance (A, B; C, E) from each other and being connected by connection profiles, with a longitudinal extent of the connection profiles (14, 18; 64) intersecting a longitudinal extent of the elongate profiles (13, 17; 63) of the chords (12, 16; 62) and being greater than the distance (A, B; C) between the elongate profiles (13, 17; 63), the support further including two longitudinally extending wave-shaped bars (21; 71) for connecting the first and second chords (12, 16; 62, 66) and having turnover regions (22; 72, 74) connected with the elongate profiles (13, 16; 63, 67) of the first and second chords, respectively.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to a support for installations in the field of housing technology and industry and including first and second chords extending parallel to each other in a spaced relationship to each other and connectable with each other by turnover regions of longitudinally extending, wave-shaped bars.
2. Description of the Prior Art
For flexible installation of conduits such as pipes, air ducts, cable routes, and the like, in the field of the housing technology and industry, often, mounting rails, which are formed of sheet metal, are used. The mounting rails have, e.g., a C-shaped cross-section, with the open region of the mounting rail serving for securing, e.g., with so-called rail nuts, of threaded rods which support the conduits in an elevated position or which provide for suspension of the conduits.
With special connection rails, these mounting rails are assembled beneath each other to form a flat or three-dimensional support structure. These mounting rails often have through-openings in the region of their bottom for direct attachment of the mounting rail to a wall or a ceiling with a dowel.
Mounting rails have proved themselves in practice. However, their drawback consists in that only one side of a mounting rail is accessible for attachment thereto. Because with a C-shaped mounting rail, an open profile is formed, the mounting rail has a substantially worse torsional resistance than a close profile.
Therefore, so-called double C-profile rails were provided, which were formed of two C-shaped mounting rails riveted or welded with each other, and with which both opposite sides are were available for attachments, so that a tubular conduit could be secured above or below a double C-profile rail. As the C-shaped mounting rails, the double C-profile rails present, with respect to their load-bearing characteristic, a compromise between the possibilities of attachment and the strength of the profile. Further, double C-profile rails have a relatively large own weight per linear meter, require a relatively large amount of material for the number of attachment possibilities they provide and, in addition, are expensive in production.
British Patent No. 1,358,261 discloses a support for a concrete formwork and having a first chord and a second chord extending parallel to each other at a distance from each other and connected with each other by turnover regions of longitudinally extending, wave-shaped bars. This support has, e.g., in comparison with a C-shaped mounting rail or double C-profile rail a reduced own weight per linear meter.
The drawback of the support disclosed in the above-mentioned British patent consists in that the support has no attachment possibilities for suspending the support or for suspending conduits and supporting them in an elevated position.
Accordingly, an object of the present invention is to provide a support with a plurality of attachment possibilities and comparatively good static characteristics.

SUMMARY OF THE INVENTION

This and other objects of the present invention, which will become apparent hereinafter, are achieved by providing a support for installation in a field of housing technology and industry and having first and second chords each of which is formed of two parallel elongate profiles spaced by a distance from each other. Connection profiles connects the elongate profiles of at least one of the first and second chords, with a longitudinal extent of the connection profiles intersecting a longitudinal extent of the elongate profiles of the at least one of the first and second chords. The longitudinal extent of the connection profiles is greater than the distance between the elongate profiles of the at least one of the first and second chords. Two longitudinally extending wave-shaped bars connect the first and second chords. The bars have turnover regions connected with the elongate profiles of the at least one of the first and second chords, respectively. The support has a three-dimensional lattice girder structure with advantageous static characteristics and a relatively small own weight per linear meter. In addition, the opening on all sides of the support provide numerous possibilities for attachment of threaded rods, connection elements, and the like, without a need in any specially formed fastening elements such as, e.g., rail nuts.
The distance between elongate profiles that form the at least one chord or also the another chord is so selected that at least one threaded rod or fastening screw can pass therebetween and be fixed on the support with check nuts such as, e.g., hexagon nuts. Advantageously, supports with corresponding distances between the elongate profiles become available for conventional types of threaded rod or fastening screws used for installations in the field of the housing technology and industry. When a threaded rod or a fastening screw, which has smaller dimensions than the distance between the elongate profile, is used, and the check nuts likewise have smaller dimensions than the distance between the elongate profiles, there can be provided a washer having corresponding dimensions or a stop with an opening for compensation of the difference in dimensions between the distance between the elongate profiles and the dimensions of the threaded rod.
The open, accessible from all sides, lattice girder structure of the support enables tightening of the check nuts from all sides and within the support. Also, only the first chord or only the second chord can be used for attachment. For heavy conduits or for suspension of the support from a ceiling, advantageously both the first and second chords are used, with the threaded rod passing through the entire support and with check nuts being tightened on both upper and lower sides of the support. Light conduits, e.g., for electrical cables or hoses can be easily secured on the support with so-called cable connectors.
Further, the open, accessible from all sides, lattice girder structure of the support enables passing therethrough of installations such as, e.g., tubular conduits that can pass between the first and second chord, with the installation being secured directly beneath the ceiling, with minimum use of space. Installations such as, e.g., tubular conduits can be supported on the support in an elevated position. The support uses the maximum available height and insures, therefore, height attachment possibilities that exceed those of a C-shaped mounting rail in several times at the comparative consumption of a material.
The elongate profiles form, in a plane extending transverse to their longitudinal extent, vertexes of a rectangle, with the support having in this plane a V-shaped cross-section. With such a shape, the support with a larger distance between the elongate elements forms, e.g., an attachment plane for securing the support on a constructional component, e.g., on a ceiling. The opening angle of the V-shaped cross-section amounts advantageously to 10°-50° and is so selected that, e.g., the pipe shell can be mounted within the support.
The wave-shaped bars are welded with the elongate profiles, which form the first and second chords, advantageously in the area of their turnover regions. The wave-shaped bars simultaneously insure a constant distance between the first and second chords along the entire longitudinal extent of the support. The wave-shaped bars are advantageously formed of a rectilinear profile bent into a wave-shaped form. Advantageously, adjacent sections of the wave-shaped bars form an angle in the range from 50° to 90°, whereby the support is provided with advantageous static characteristics.
In addition to a continuous wave-shaped form, the bars can be formed with a trapezoidal wave shape. In this case, the bar is bent into a form consisting of stringed together trapezia. Advantageously, the adjacent sections of the stringed together trapezia form an angle from 15° to 35°, which insures that support is provided with advantageous static characteristics. Another form of the wave-shaped bar can be obtained by providing a zig-zag-shaped bars.
According to one embodiment of the support according to the present invention, the wave-shaped bars are connected with the elongate profiles on the inner sides of the elongate profiles, which provides for a simple manufacturing of supports having the V-shaped cross-section. The turnover regions of the bars are connected, preferably welded, in the region of the elongate profiles, which are arranged next to teach other, advantageously with the elongate profiles, on one hand, and on the other hand, with each other to provide for a desired distance between the elongate profiles.
Alternatively, the wave-shaped bars can be connected with the elongate profiles on their outer sides, which likewise insures an easy manufacturing of the supports. In addition, with this embodiment of the support, the entire space defined by the plane passing through the elongate profiles and extending in a direction transverse to the longitudinal extent of the elongate profiles, is available for securing means, without the wave-shaped bars narrowing this space.
The connection profiles are arranged on at least one of the chords at an angle to the longitudinal extent of the elongate profiles, so that the longitudinal extent of the connection profiles intersects the longitudinal extent of the elongate profiles. The connection profiles have a longitudinal extent that is greater than the distance between the elongate profiles. Thus, the connection profiles cross the elongate profiles. Therefore, a sufficiently large contact surface between the connection profiles and the elongate profiles is available for providing a reliable connection therebetween. The smaller is the angle formed by the longitudinal extent of the elongate profiles and the longitudinal extent of the connection profiles, the longer the longitudinal extent of the connection profiles must be.
Advantageously, the connection profiles connect the elongate profiles of one of the chord with the elongate profiles of another of the chords, which provides a stable support in which the elongate profiles of both chords are secured by the wave-shaped bars, on one hand, and by respective connection profiles, on the other hand.
Advantageously, the connection profiles extend perpendicular to the longitudinal extent of the elongate profiles, whereby an adequate free space is provided for attachment of the threaded rods, connection elements, and the like. In addition, such a support remains stable to a most possible extent even after increasing its length to a desired length.
Advantageously, the elongate profiles form, in a plane extending transverse to their longitudinal extent, vertexes of a rectangle. The support can be oriented in different directions and provides, thereby, a plurality of attachment possibilities. In this advantageous embodiment of the support, the same securing means, e.g., check nuts, can be used with the first chord and the second chord for securing a threaded rod or a fastening screw passing or extending through the support. The support, in addition to a rectangular cross-section having different transverse dimensions such as, e.g., a width different from the height, can have a square cross-section.
With simple connection means, e.g., a combination of angles and fastening screws, several supports having a rectangular cross-section can be easily connected to form a flat or three-dimensional support construction. The connection means can include, as a connection element, e.g., an L-shaped angle with legs extending at an angle to each other, or an angle with multiple bends, with more than two legs. Advantageously, all legs of the angle are provided with through-openings for fastening screws.
It is particularly advantageous when the openings are formed as rectangular openings in which, e.g., a truss-head screw with a rectangular headpiece can be secured against rotation, providing for a simple mounting of connection means.
Advantageously, the connection profiles are secured on respective adjacent sides of respective elongate profiles forming respective first and second chords. Thereby, a receiving space, e.g., for a guide section of an attachment element, is provided between the elongate profiles forming the first chord and/or elongate profiles forming the second chord. As a connection element for connecting two supports, e.g., a L-shaped angle provided with beads, can be used, with the bead bottom penetrating into the receiving space upon mounting of the L-shaped angle on the support. The beads in the angle serve, on one hand, as guide means and as rotation-preventing means and, on the other hand, the beads improve the strength characteristics of the angle. The receiving space can simultaneously serve for receiving the rectangular headpiece of a truss-head screw. Thereby, the truss-head screw is retained against rotation upon being tightened.
Advantageously, the wave-shaped profile of the bars undulates in a direction transverse to the longitudinal extent of the elongate profiles so that a plurality of attachment possibilities is provided on support sides between the first and second cords. This arrangement of the wave-shaped bars is particularly advantageous when an installation, e.g., a tubular conduit must be extended between the first and second chords.
Advantageously, the wave-shaped bars form attachment regions for the support which are formed by turnover regions extending beyond the elongate profiles and parallel to a plane passing through elongate profiles of one of the chords. With wave-shaped bars which are secured to the elongate profiles at their inner sides, the turnover regions are bent outwardly and form a through-opening for a fastening element for securing the support on a constructional component. For securing the support, a dowel with a washer is used as a fastening element. The dowel, upon tightening, on one hand, engages the wave-shaped bar in the area of attachment regions and, on the other hand, engages elongate profiles, whereby the welding spots between the wave-shaped bar and the corresponding elongate profile are relieved. With the wave-shaped bars which are secured on the outer side of the elongate profiles, the turnover regions are bent inwardly and form a through-opening for a fastening element for securing the support on a constructional component. With wave-shaped bars formed by stringed together trapezia, the turnover regions thereof, which extend along the longitudinal extent of the corresponding elongate profiles, can form an attachment region for the support, providing fixing eyelets in form of elongate openings, which noticeably improves the flexibility of fastening possibilities. Advantageously, at least one of the elongate profiles has a circular cross-section. Most advantageously, all of the elongate profiles have a circular cross-section. Such a support can be easily produced in a plurality of shapes to be able to cover a large field of static requirements the support needs to meet.
Advantageously, at least one of the connection profiles and/or at least one of the wave-shaped bars has a circular cross-section. Most advantageously, all of the connection profiles and/or wave-shaped stabs have a circular cross-section. Such a support can be easily produced in a plurality of shapes to cover a large field of static requirements the support needs to meet.
According to an advantageous embodiment of the invention, the elongate profiles, the connection profiles, and the wave-shaped bars all have a circular cross-section. Alternatively, separate profiles can have a non-circular cross-section, whereby, e.g., a combination of elongate profiles with polygonal, e.g., rectangular, cross-section and with a circular cross-section can be used for forming the first chord and/or the second chord.
Advantageously, the ratio of cross-sectional dimensions of elongate profiles to cross-sectional dimensions of the wave-shaped bars lies in a range from 1.1:1 to 3:1, which provides for a support with advantageous static characteristics at a low own weight per linear meter.
Advantageously, the ratio of cross-sectional dimensions of elongate profiles to cross-sectional dimensions of the connection profiles lies in a range from 1:1.1 to 1:3 which provides for a support with advantageous static characteristics at a low own weight per linear meter.
The elongate profiles, connection profiles, and/or wave-shaped bars are advantageously formed of wire. For a simple manufacturing of supports, advantageously, wires with the same cross-sectional dimensions and/or with the same cross-sectional shape are used for the wave-shaped bars and the connection profiles.
Instead of welding connections, the elongate profiles, connection profiles, and the wave-shaped bars can be soldered with each other or glued with each other.
As the material for the profiles or the wire advantageously, metal is used. Dependent on the field of use, a stainless steel or aluminum can be used. Alternatively, the profiles and wire can be formed of plastics or a carbon fiber-reinforced plastics for producing supports.
The novel features of the present invention, which are considered as characteristic for the invention, are set forth in the appended claims. The invention itself, however, both as to its construction and its mode of operation, together with additional advantages and objects thereof, will be best understood from the following detailed description of the preferred embodiments, when read with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings show:
FIG. 1 a side view of a first embodiment of a support according to the present invention;
FIG. 2 a cross-sectional view along line II-II in FIG. 1;
FIG. 3 a side view of FIG. 1 with attachment components;
FIG. 4 a cross-sectional view along line IV-IV in FIG. 3;
FIG. 5 a cross-sectional view along line V-V in FIG. 3;
FIG. 6 a side view of a connection point of two supports according to the present invention;
FIG. 7 a cross-sectional view along line VII-VII in FIG. 6;
FIG. 8 a side view of a second embodiment of a support according to the present invention;
FIG. 9 a cross-sectional view along view IX-IX in FIG. 8; and
FIG. 10 a view along line X-X in FIG. 9.
Basically, the same elements in the drawings are designated with the same reference numerals.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A support 11 for installations in the field of housing technology and industry, which is shown in FIGS. 1-2 and represent a first embodiment of the present invention, includes a first support chord 12 and a second support chord 16 spaced from the first support cord 12 and extending parallel thereto. The first and second chords 12, 16 are connected with each other by two, wave-shaped along their longitudinal extent, bars 21 which are connected with the first and second chords 12, 16 at their turnover regions 22. The adjacent sections 23 of the wave-shaped bars 21 form with each other an angle W of about 70°.
The first chord 12 is formed of two, extending parallel to each other and spaced from each other by a distance A, elongate profiles 13 which are connected with each other by connection profiles 14, with the longitudinal extent of the connection profiles 14 being transverse to the longitudinal extent of the elongate profiles 13. The longitudinal extent of a connection profile 14 is greater than the distance A between the elongate profiles 13. Both the elongate profiles 13 and the connection profiles 14 are formed of a wire having a circular cross-section. The longitudinal extent of the connection profile 14 is greater than the distance A between the elongate profiles 13 by about a double of a diameter D of the elongate profile 13. The wave-shaped bars 21 are also formed of a wire having a circular cross-section.
The second chord 16 is formed of two elongate profiles 17 extending parallel to each other and spaced from each other by a distance B. The elongate profiles 17 are connected with each other by connection profiles 18 extending transverse to the longitudinal extent of the elongate profiles 17. The connection profiles 18 have a longitudinal extent which is greater than the distance B between the two elongate profiles, and are formed of a wire having a circular cross-section. The longitudinal extent of the connection profiles 18 is greater than the distance B between the elongate profiles 17 by about a double of the diameter D of the elongate profiles 17.
The elongate profiles 13 and 17 form, in a plane extending transverse to their longitudinal extent, vertexes of a rectangle (see FIG. 2). In the embodiment shown in FIGS. 1-2, the distance A between the elongate profiles 13 and the distance B between the elongate profiles 17 are equal to each other. The wave-shaped profile of the bars 21 undulates in a direction transverse to the longitudinal extent of elongate profiles 13 and 17, and the bars are connected with elongate profiles 13 and 17 on the outside thereof.
The connection profiles 14 of the first chord 12 are fixedly secured on the side of the elongate profiles 13, which form the first chord 12, adjacent to the elongate profiles 17 of the second chord 16, by welding to provide a receiving space 15. The connection profiles 18 of the second chord 16 are fixedly secured on a side of the elongate profiles 17, which form the second chord 16, adjacent to the elongate profiles 13 of the first chord 12, by welding to provide a receiving space 19.
Each respective connection profile 14 or 18 is connected by welding points with the elongate profiles 13 which form the first chord 12, and with the elongate profiles 17 which form the second chord 16, at each connection region of the turnover regions 22 of the wave-shaped bars 21. Additional connection profiles 14 and 18 are provided, respectively, on the elongate profiles 13, which form the first chord 12, and elongate profiles 17, which form the second chord 16, between the turnover regions 22 of the wave-shaped bars 21.
The ratio of the diameter D of the elongate profiles 13 or 17 to the diameter S of the wave-shaped bars 1 amounts to 2:1. The ratio of the diameter D of the elongate profiles 13 or 17 to the diameter V of the connection profiles 14 or 18 amounts also to 2:1 in the embodiment shown in FIGS. 1-2.
Below, with reference to FIGS. 3-5, two examples of possible connections with the support 11 will be described.
For suspension 30 of the support 11 from a ceiling (not shown), a threaded rod 31 with a M 10 thread is secured on a ceiling with a dowel, is passed between the elongate profiles 13 and 17, which form, respectively, the chords 12 and 16, and is secured with two check nuts 32 and 33. With the check nuts 32 and 33, the suspension height of the support 11 can be easily adjusted.
For suspension 36 of a tubular conduit (not shown) on a support 11, a threaded rod 37 with a thread M 10 is passed between elongate profiles 17, which form the second chord 16, and is secured with two check nuts 38, 39. With an open, accessible from all sides, lattice girder structure of the support 11, the check nut 39 can be easily secured inside the support 11 with a wrench. With the check nuts 38, 39 the suspension height of the tubular conduit can be easily adjusted.
FIGS. 6-7 illustrate a connection junction for connecting a horizontally extending support 11 with a vertically extending support 41. The support 41 is formed in the same way as the support 11. With two L-shaped angles 51 and three truss-head screws 56 with a rectangular headpiece 58 and on which, respectively, a hexagon nut is screwed as a check nut 57, the support 11 is secured on the support 41.
Each angle 51 has two, arranged perpendicular to each other legs 52, with each leg 52 having a bead 54 and a rectangular opening 53. The bead 54 is so formed that upon placing the angle 51 on the support 11 or 41, it is located in the receiving space between elongate profiles which form the first chord or the second chord. The rectangular headpiece 58 on the truss-head screw 56 is so selected that it can pass through or extend into the receiving space between the elongate profiles. The truss-head screw 56, e.g., is passed first through the angle 52 and then through the support 11 or 41, with the headpiece 58 of the truss-head screw 56 engaging in the rectangular opening 53, which insures that the truss-head screw 56 would not rotate. Alternatively, the truss-head screw 56 is first passed through the support 11 or 41 and finally through the angle 52, with the rectangular headpiece 58 of the truss-head screw 56 being located between the elongate profiles of the support 11 or 41, which likewise insures that the truss-head screw 56 would not rotate.
FIGS. 8-10 show a second embodiment of a support 61 according to the present invention and having a first chord 62 and a second cord 66 extending parallel to the first chord 62 and spaced therefrom. The first and second chords 62, 66 are connected with each other by two, wave-shaped along their longitudinal extent, bars 71 which are connected with the first and second chords 62, 66 at their turnover regions 72 and 74. The first chord 62 is formed of two, extending parallel to each other and spaced from each other by a distance C, elongate profiles 63 which are connected with each other, by connection profiles 64, with the longitudinal extent of the connection profiles 64 being transverse to the longitudinal extent of the elongate profiles 63. The longitudinal extent of the connection profiles 64 and the longitudinal extent of the elongate profiles 63 form with each other an angle N of less than 90°. The longitudinal extent of the connection profiles 64 is so selected that they can be welded with the elongate profiles 63. The second chord 66 is formed of two elongate profiles 67 extending parallel to each other and spaced from each other by a distance E. The support 61 has, in a plane extending transverse to the longitudinal extent of the elongate profiles 63 and 67, a V-shaped cross-section. The wave-shaped bars 71 form in this cross-section an angle F of 40°.
The wave-shaped bars 71 are formed of a wire having a circular cross-section and have, in a side view, a plurality of following each other trapezia. An angle G between two adjacent sections 73 of the wave-shaped bar 71 amounts to 15°.
The wave-shaped bars 71 extend in a direction transverse to the direction of the longitudinal extent of the elongate profiles 65 or 67 and are welded to the adjacent sides of the elongate profiles 63 or of the elongate profiles 67, respectively. In the turnover region 74, the well-shaped bars 71 are additionally welded with each other and provide the desired distance E between the elongate profiles 67 of the second chord 66.
The wave-shaped bars 71 form further connection regions 76 for the first chord 61, with the connection regions 76 being formed by turnover regions 74 which extend outwardly beyond the elongate profiles 63. The connections regions 76 extend parallel to a plane passing through the elongate profiles 63 of the chord 62. The connection regions 76 form elongate openings through which fastening elements can be extended. The wave-shaped bars 71 abut the elongate profiles 63 and are connected therewith in respective tangent regions 75.
The elongate profiles 63 and 67 and the connection profiles 64 have a circular cross-section. The ratio of the diameter K of the elongate profiles 63 and 67 to the diameter L of the wave-shaped bar 71 amounts to 1.5:1. The ratio of the diameter K of the elongate profiles 63 and 67 to the diameter M of the connection profiles 64 amounts in the embodiment shown in FIGS. 8-10, to 2:1.
The distance H between the first chord 62 and the second chord 66 is so selected that an installation can pass therebetween. FIG. 8 shows, with dot-dash lines, a pipe shell 81 secured on the second chord 66 for supporting of a conduit extending therethrough. The distance E between the elongate profiles 66 of the second chord 66 is so selected that a threaded rod can pass therethrough and be secured to the second chord 66 with a check nut.
Though the present invention was shown and described with references to the preferred embodiments, such is merely illustrative of the present invention and is not to be construed as a limitation thereof and various modifications of the present invention will be apparent to those skilled in the art. It is therefore not intended that the present invention be limited to the disclosed embodiments or details thereof, and the present invention includes all variations and/or alternative embodiments within the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A support for installations in a field of housing technology and industry, comprising first and second chords (12; 62 and 61; 66) each formed of two parallel elongate profiles (13, 17; 63, 67) spaced by a distance (A, B; C, E) from each other; connection profiles (14, 18; 64) for connecting the elongate profiles (13, 17; 63) of at least one of the first and second chords (12, 16; 62), with a longitudinal extent of the connection profiles (14, 18; 64) intersecting a longitudinal extent of the elongate profiles (13, 17; 63) of the at least one of the first and second chords (12, 16; 62) and being greater than the distance (A, B; C) between the elongate profiles (13, 17; 63) of the at least one of the first and second chords (12, 16; 62); and two longitudinally extending wave-shaped bars (12; 71) for connecting the first and second chords (12, 16; 62, 66) and having turnover regions (22; 72, 74) connected with the elongate profiles (13, 16; 63, 67) of the first and second chords, respectively.

2. A support according to claim 1, wherein the elongate profiles (13) of the at least one of the first and second chord (12) and the elongate profiles (17) of another of the first and second chords (17) are connected with each other by respective connection profiles (14, 18).

3. A support according to claim 1, wherein the connection profiles (14, 18) extend perpendicular to the longitudinal extent of the elongate profiles (13, 17) of the at least one of the first and second chords (12, 16).

4. A support according to claim 1, wherein the elongate profiles (13, 17) form, in a plane extending transverse to the longitudinal extent of the elongate profiles (13, 17), vertexes of a rectangle.

5. A support according to claim 2, wherein the connection profiles (14, 18) are secured to respective, adjacent to each other, sides of the elongate profiles (13) of the first chord (12) and the elongate profile (17) of the second chord (16).

6. A support according to claim 1, wherein a respective connection profile (14, 18) is connected fixedly with the elongate profiles (13, 17) forming the at least one of the first and second chords (12, 16) at each connection region of the turnover regions (22) of the wave-shaped bars (21).

7. A support according to claim 1, wherein the wave-shaped profile of the bars (12; 71) undulates in a direction transverse to the longitudinal extent of the elongate profiles (13, 17; 63, 67).

8. A support according to claim 1, wherein the wave-shaped bars (71) form connection regions (76) for the support (61), with the connection regions (76) being formed by the turnover regions (72) extending beyond the elongate profiles (63) parallel to a plane passing through the elongate profiles (63) of the chords (62).

9. A support according to claim 1, wherein at least one of the elongate profiles (13, 17; 63, 67), the connection profiles (14, 18; 64), and the wave-shaped bars (21; 71) have a circular cross-section.

10. A support according to claim 1, wherein a ratio of cross-sectional dimensions (D) of the elongate profiles (13, 17; 63, 67) to a cross-sectional dimension (S) of the wave-shaped bars (21; 71) lies in a range from 1.1:1 to 3:1.

11. A support according to claim 1, wherein a ratio of cross-sectional dimensions (D) of the elongate profiles (13, 17; 63, 67) to cross-sectional dimensions (V) of the connection profiles (14, 18; 64) lies in a range from 1:1.1 to 1:3.