WO2014111073A1

WO2014111073A1 - Framework standing structure

Info

Publication number: WO2014111073A1
Application number: PCT/DE2013/000826
Authority: WO
Inventors: Piotr JURKOJC
Original assignee: Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung
Priority date: 2013-01-16
Filing date: 2013-12-31
Publication date: 2014-07-24
Also published as: DE102013001188B3

Abstract

In the known framework standing structure for the foundation of a wind turbine, three pairs of pillars are provided, which each consist of two pillars that are inclined and bent twice and which intersect above the centre of said pillars. In order to be able to bear greater loads and to compensate torsional forces better, in the framework standing structure (01) according to the invention, a further pair of pillars (15) is arranged in front of or behind each first pair of pillars (12) consisting of first pillars (02) that intersect at crossing points (13), the further pillars (16) of which further pair of pillars intersect at a further crossing point (19), which is however situated below the centre of said pillars. None of the first and further pairs of pillars (12, 15) touch each other. Owing to the diagonal arrangement of the pillars (02, 16) all the effective forces are largely distributed uniformly to said pillars, the effective forces being distributed to two levels owing to the contact-free duplication of the pairs of pillars (12, 15). The centre of the framework standing structure (01) remains free. It can absorb both torsional forces and bending forces particularly well and distribute them uniformly. Together with a very low weight of relatively few, structural elements that can be readily pre-assembled, particular advantages are produced for the offshore installation of wind turbines.

Description

Designation truss structure

description

The invention relates to a truss stand structure with at least six regularly arranged around a vertical central axis first legs, with their upper ends with a support element for supporting a structure, such as a wind turbine, and with their lower ends with a substrate for reasons the stand structure are connected, wherein the first legs are inclined with their upper ends in the direction of the vertical central axis and each two first legs intersect each other and form a first pillar pair with a first intersection, which lies above the center of the first legs.

Truss stand structures, also referred to as lattice towers, spatial trusses or jacket structures, can carry large or small structures depending on their dimensions. Truss stand structures for large structures, such as engineering structures, in the embodiment of foundation structures, structures or elevations are required in various applications, such as for carrying energy systems, such as offshore wind turbines, substations, for example in the form of elevated transformer stations and cable junctions in wind farms, Reservoirs, work platforms, signaling devices, cranes, towers or masts. Depending on the application, the large truss stand structures can be arranged on the mainland or in the water on the bottom of the water as a substrate. When placed in water, they can be completely submerged or partially (permanently or temporarily) sticking out of the water. Depending on the application, they can also be made of different materials, For example, metal, plastic or concrete, with an exclusive use or of a composite material, such as a fiber composite, or a hybrid material, such as a combination of steel with concrete or plastic, and have very different dimensions, the material and the dimensions of the prevailing Compressive and tensile forces in the truss structure are adjusted. In the calculation of lattice masts, the determination of the bar forces and stresses can be carried out according to the classical methods of truss calculation (nodal point method or Ritter's section method) or by a finite element calculation. The manageable and easily manageable calculations make it possible in particular to effectively optimize for occurring loads. Truss stand structures are usually made of steel profiles, for example, of isosceles L-angles, or steel pipes, which are connected by welding or riveting or by special fasteners. Particularly advantageous in truss-stand structures are their low weight and low manufacturing and assembly costs, also the already mentioned effective optimizability.

A major application for the currently claimed truss stand structure in a large dimensioning is the use as a foundation structure for an offshore wind turbine (OWEA). The truss stand structure with its support element carries the tower of the OWEA. The majority of renewables for power generation currently consists of more than 40% wind energy. The development of wind turbines is progressing rapidly. The tower heights increased from 30 m to 120 m, the rotor diameter increased from 15 m to 127 m. In the newly developed heights with increased wind speeds and enlarged rotors, systems can currently deliver up to 6 MW of generator power. The larger facilities are mainly operated as offshore wind turbines, as off the coast sufficient parking spaces in uninhabited environment and the wind speeds are even higher. In offshore areas, however, prevail in contrast to a land use fundamentally different conditions, in addition to strong wind forces occur especially strong wave forces. For OWEA, adaptations must therefore also be found for the truss stand structures in order to be able to withstand the enormous loads. Furthermore, in the case of offshore foundations for reasons of environmental protection, the complete dismantling of the installation after it has been taken out of service should be taken into account when choosing the type of foundation. All parts of the system must be removed to a depth of approx. 2-4 m below the seabed. The nature of the foundations of OWEAs depends very much on the water depth, the nature of the seabed and the environmental conditions such as currents, tidal range, waves, ice drift etc.

State of the art

GB 2 188 356 A discloses a truss stand structure for an OWEA that rests on four legs which are inclined in two tangent planes around the vertical central axis. The legs do not touch each other directly, but are connected by support struts. In this case, first support struts form a first support strut pair with an intersection that lies in the middle of the first support struts. Seen in the direction of the vertical central axis behind the first support strut pair is another, intersecting strut pair, which is arranged horizontally and connected to the first support strut pair. The further intersection of the other support struts is at the end of a further support strut.

An arrangement as a stand structure for a rotor with successive legs is known from US 4,323,331 A, wherein the legs of a rotor arranged with respect to the front and a pair of support leg with their lower ends with two front feet of the device and with their upper ends with connected to a platform which is perpendicular to the connecting line between the two foot points. It arises two triangles rotated 180 ° to each other, which are not parallel but tilted to each other. In the entire truss stand structure occur no intersections between touching legs. The successive pillar pairs are connected by supporting struts with each other, which also do not cross touching.

Intersecting legs are known, for example, from US Pat. No. 1,668,4 E, where the intersections are formed by first and further legs, which lie one behind the other in different planes. In this case, all the first legs are inclined in a first direction and all in the direction of the vertical center axis lying behind further legs in the opposite direction. The first and further legs are connected in the intersections, it creates a kind of scissors. A similar truss stand structure is known from GB 2 339 436 B. Here the first and further legs crossing in different planes are not connected. They in turn form a kind of scissors lattice with a plurality of intersections in plan view. Torsions forces are derived either by the first legs in one direction or by the other legs in the other direction. To stabilize the truss stand structure, a connection of the first and further legs can be provided by horizontal support struts. However, such truss stand structures usually carry no very large loads and can be used, for example, as telephone poles.

The closest prior art to the invention and thus the generic truss stand structure is disclosed in AT 507 013 B1. A truss stand structure is described with six first legs arranged regularly around a vertical central axis. To improve the stability, the first legs are inclined with their upper ends against the vertical central axis, so that the inscribed tip circle of the upper ends of the first legs is smaller than the inscribed root circle of the lower ends of the first legs. The first legs are connected at their upper ends to a support member in the form of a platform for supporting a construction in the form of a Darrieus rotor as part of a WEA. With their lower ends are the first legs on a substrate, such as a building roof. Each two adjacent legs, which may be formed from tubes, intersect each other and form a first pillar pair with a first intersection, which lies above the center of the first legs. The first legs are inclined by their arrangement in two tangential directions. In addition, they still run axially curved in order to achieve a better damping behavior compared to rotor vibrations. Support struts are not provided in the known truss stand structure. However, this is very delicate and has only a limited buoyancy. Although the half-timbered stand structure can damp due to the curved legs rotating due to the horizontal rotating Darrieus rotor vibrations. However, in the radial direction acting torsional forces, such as wind loads, they can compensate only very limited. Such forces can lead to a further curvature and an overload of individual legs and stance uncertainties.

In the non-prepublished, older German patent application DE 10 2012 010 205.4 the applicant claims a truss-stand structure in which the legs, which are also inclined in two tangential directions and cross each other in pairs, are supported by radial struts, all in a common Make a connection that is located centrally on the vertical center axis. This results in a direct, diagonal connection of opposing legs, the center of the truss stand structure is occupied around the vertical center axis accordingly. The attacking forces are absorbed not only by the primarily loaded, usually the attacking force, such as wind power, opposing legs, but also by the legs on the side of the attacking force. This results in the older truss stand structure a particularly uniform distribution of the attacking forces on all legs. It ensures a safe stand and an overload avoided. The new, claimed with the present application Fachwerk- stand structure in which the central area around the vertical center axis remains free, represents an alternative to the older framework stand structure, while maintaining their advantages in the new framework stand structure, the resilience, especially with respect Torsion, still improved and the total weight could be reduced again.

task

Starting from the above-described, known generic truss stand structure, the object for the present invention is to be seen to achieve by structural means an improvement in stability, in particular against attacking torsional forces. Furthermore, larger loads should be able to be carried on the support element. In this case, existing advantages of the generic truss stand structure, in particular the low weight, the moderate manufacturing and assembly costs and the filigree and aesthetically very appealing visual appearance, should be preserved and improved. The solution according to the invention for this task can be found in claim 1. Advantageous developments of the invention are set forth in the subclaims and explained in more detail below in connection with the invention.

In the claimed truss stand structure with a plurality of first pillar pairs of crossed first legs is arranged according to the invention in the direction of the vertical center axis in front of or behind each first pillar pair another leg pair of two further legs. The other legs of each further pillar pair are according to the invention with their upper ends in the direction of the vertical

Central axis inclined and connected to the support element and with their lower ends to the ground. Furthermore, according to the invention, the further legs of each further leg pair intersect in a wide ren junction. This is inventively below the middle of the other legs. Furthermore, the first and the further pillar pairs are connected neither directly nor indirectly by supporting struts. In the truss stand structure according to the invention, the first pillar pairs are relieved by the further pillar pairs arranged in front or behind with respect to the force distribution. By arranged in two levels, each in a plane directly crossing legs diagonal connections between more distant locations on the platform and at the founding of the framework structure are created. In this case, a force distribution between the individual levels is not possible due to lack of connections between the first and further legs. Attacking - also very large - loads, in particular torsional forces are derived in parallel over several legs of the truss stand structure and in two levels. Another improvement of

Force distribution and thus a further increase in stability arise in the stand structure according to the invention in that the further intersections of the further legs below the center of the other legs, whereas the first intersections of the first legs are above the center of the first legs. In this case, by the selectable positioning of the first intersections above the center of the first legs and the other intersections below the middle of the other legs an effective

Optimization of the truss stand structure according to the invention ensured by an optimal adaptation to the predetermined load conditions.

The first and the before or behind lying associated further pillar pairs do not touch each other. The first and further pillar pairs are not directly or indirectly connected by support struts. Attacking forces are thus guided in parallel through the first and further legs and optimally distributed in the truss stand structure, whereby a high stability and a uniform stress distribution in the individual legs is achieved. Attacking loads are caused by the diagonal connection between the legs evenly introduced into the underground. The diagonal connections of the legs ensure a particularly high torsional rigidity of the claimed truss stand structure. Due to the doubling of the pillar pairs, the filigree character and thus also the low weight of the truss structure according to the invention remain intact. This is associated with a small number of individual components that make up the

Truss structure is composed. Manageable parts lists with lightweight individual components are of great importance especially for offshore installations.

From the above-mentioned prior art, it is known that the legs can run with a non-zero curvature. But specially bent or piece by piece set legs are needed. In the truss-stand structure according to the invention can advantageously and preferably the first legs of each first pair of leg pair run straight through the first intersection. As a result, simple, unbent, one-piece tubes can be used as semi-finished for the legs. The other legs can run straight through the further intersection. Taking into account the condition that the further intersections lie below the middle of the further legs, the upper and lower ends of the further legs are respectively connected to the platform and the ground. This can lead to a relatively sprawling truss stand structure. Therefore, it is preferred and advantageous if the other legs extend at an angle through the further intersection. As a result, the further intersection can be placed in an optimal location below the center of the further legs, without the entire truss stand structure assuming expansive dimensions or the platform must be designed correspondingly expansive.

A further weight saving in the truss-stand structure according to the invention, it is when the support element is not solid, but preferably and advantageously formed star-shaped. It has several Bumps, which serve to connect to the upper ends of each of a first and another leg of two first and further leg pair. In the middle of the star-shaped Auflagerelements a column may be arranged, on which the WEA is supported upwards. Furthermore, in the truss stand structure according to the invention, preferably and advantageously at least three (at least six first legs) anchored in the ground foundation elements may be provided. These then serve the connection with the lower ends of each of a first and a further pillar of two pillar pairs.

It has already been stated above that the legs run in a straight line or at an angle through the intersections. Basically, the legs in the intersections can be easily welded together, bolted or riveted. It is preferred and advantageous if the intersections of independent first and / or further crossing elements, in particular cast crossings, are formed, in which sections of the legs terminate from the first and / or further leg pairs. Such cast intersections are easy to assemble and assemble or disassemble when dismantling the truss stand structure.

Furthermore, in the truss-stand structure according to the invention advantageously and preferably between the first legs and / or between the other legs first and / or further support struts may be arranged, wherein a connection of the first and further legs together by first or further support struts is excluded according to the invention , The filigree appearance and the lightness of the truss stand structure according to the invention are not disturbed by the first and / or further support struts between the first legs and / or the further legs, but their stability is increased even further. The first and / or further support struts can be arranged according to the selected load cases, in particular they can preferably and advantageously be arranged horizontally. By appropriate load simulations their arrangement is - exactly like the entire design of the truss structure according to the invention - relatively easy to determine. Finally, it has often been mentioned that the first and further legs as well as the first and / or further support struts can be advantageously and advantageously formed from steel tubes that are commercially available as inexpensive semis in all dimensions and are easy to transport and assemble.

Further structural details on this and on the previously executed modifications of the claimed truss-stand structure according to the invention can be taken from the following embodiments. However, the claimed truss-stand structure is not limited to the embodiments in which embodiments are shown with three first pillar pairs. Other embodiments with more than three first pillar pairs are also readily executable analogously.

Before that, a few figures should be given as clues for the performance of the truss stand structure according to the invention. At a total weight of 239.7 1 calculated in the simulation, a rotation stiffness of 4552.83 MNm / rad was calculated. A conventional jacket stand structure shows in comparison a rotational stiffness of only 2791 MNm / rad. The stress distribution of the truss stand structure according to the invention under different load cases (load attack at 0 °, 90 ° and 180 °) corresponds approximately to the stress distribution in the above-mentioned older stand structure. In particular, however, the torsional stiffness in relation to the total weight could be compared to the older stand structure again achieved a significant improvement. The truss-stand structure according to the invention shows due to their special structure at a lower total weight, a higher torsional rigidity. embodiments

The truss stand structure according to the invention will be explained below with reference to the schematic, not to scale figures for further understanding even further. In detail, the shows

FIG. 1 shows a perspective oblique view of the truss stand structure,

FIG. 2 shows a perspective side view of the truss stand structure in a view slightly rotated to the view according to FIG. 1,

3 is a perspective oblique view of the truss

Stand structure in the direction of the vertical central axis,

FIG. 4 shows a bottom view of the truss stand structure in a viewing direction which is slightly rotated relative to the vertical center axis,

FIG. 5 is a perspective oblique top view of the truss

Stand structure

FIG. 6 shows a geometrical representation of the planes in the framework

Stand structure and

Figure 7 is a perspective oblique view of the framework stand structure without reference numerals with black and white representation of the pillar pairs for better distinction.

1 shows a truss stand structure 01 according to the invention with six first legs 02 as an exemplary embodiment in a perspective oblique view. The first legs 02 are regularly arranged around a vertical center axis 03 around and inclined in two directions. The first legs 02 are inclined with their upper ends 04 in the direction of the vertical center axis 03 and connected to a support element 05 for supporting a construction 06, for example a wind turbine. With their lower ends 07 are the first legs 02 with a substrate 08 via foundation elements 09 to the grounds of the truss Stand structure 01 connected. In the selected embodiment with six first legs 02 three foundation elements 09 are provided. Between each two adjacent foundation elements 09, the first legs 02 extend toward each other to form a first pillar pair 12 and have a first intersection 13. This is above the center 14 of the first legs 02. On one and the same foundation element 09 extend the first legs 02 from different pillar pairs 12, however, inclined away from each other. This applies analogously to the other legs 16 (see below). By a further inclination of the first legs 02 also in the direction of the vertical center axis 03 defined by the upper ends 04 tip circle 10 is smaller than that defined by the lower ends 07 of the first legs 02 Fußkreis 1 1. This provides a good stability of the entire Timber frame structure 01 achieved.

In the direction shown on the vertical center axis 03, a further leg pair 15 of two further legs 16 is arranged behind each first leg pair 12 in the embodiment shown. The further legs 16 are also inclined with their upper ends 17 in the direction of the vertical center axis 03 and connected to the support element 05. With their lower ends 18, the further legs 16 are also connected to the substrate 08 or with the foundation elements 09. Thus, the other legs 16 extend in a different plane to the first legs 02. Instead of the arrangement shown the other legs 16 behind the first legs 02 in the direction of the central axis 03 and their arrangement in front of the first legs 02 may be provided. As a result, nothing changes in principle in the force distribution in the truss stand structure 01. The further pillars 16 in each further pillar pair 15 in turn intersect each other in another intersection 19. However, this lies below the center 20 of the further pillars 16. In contrast, the intersections 13 of the first legs 02 are each above the center 14 of the first legs 02 All first pillar pairs 12 and all other pillar pairs 15 are not included either directly or indirectly by support struts. connected. Attacking forces are thus distributed in parallel over the first pillar pairs 12 and the further pillar pairs 15 and discharged via the foundation elements 09 into the ground 08.

FIG. 2 shows the truss stand structure 01 according to FIG. 01 in a perspective side view. Right in the illustration, the straight course of the first legs 02 by the first intersection is clearly visible. Furthermore, it is also easy to see that the further legs 16 in one plane straight through including a 180 ° angle 24 (see Figure 2 right) and in the other plane at an angle including an obtuse angle 24 (see Figure 2 center) by the further intersection 19 run. As a result, the further intersection 19 can be optimally positioned below the middle 20 of the further legs 16. The upper ends 17 of the further legs 16 can be connected in good position to the support elements 05 and the lower ends 18 of the further legs 16 can be connected in good position to the ground 08 or to the foundation elements 09.

In the figure 3 the truss stand structure 01 is shown according to the invention in a perspective oblique view. Evident are the support element 05 and the foundation elements 09. The first pillar pairs 12 are formed from the first legs 02 with the first intersections 13. The further pillar pairs 15 are formed from the further legs 16 with the further intersections 19. It can also be clearly seen in this illustration that the first pillar pair 12 and the further pillar pair 15 do not touch each other. Shown are also first support struts 25 between the first legs 02 and further support struts 26 between the other legs 16 (see also Figures 1, 2). Both the first support struts 25 and the further support struts 26 are arranged horizontally in the embodiment shown. But you can also be arranged arbitrarily inclined. FIG. 4 shows a bottom view of the truss structure 01. Good to see here are the various first and other pillar pairs 12, 15 with the first and other intersections 13, 19, also shown. Also shown are the first support struts 25 and the further support struts 26. In this illustration, it can also be clearly seen that the Center of the truss stand structure 01 around the vertical center axis 03 around is free, which facilitate the assembly and maintenance. It can also be clearly seen that the upper ends 04 of the first legs 02 and the other upper ends 17 of the further legs 16 are connected side by side on a horizontal line 27 to the support element 05. This facilitates the prefabrication of the support element 05 and the mounting of the legs 02, 15. In addition, a particularly uniform and attractive visual appearance. For the same reasons, the foundation elements 09 are also each a first

Leg 02 and another leg 16 in a vertical line 28 arranged one above the other (see also Figure 1).

In FIG. 5, the aforementioned special features which characterize the visual appearance and simplify the prefabrication and assembly of the truss structure 01 are shown again. It is shown that each horizontal line 27 is positioned on a bulge 29 in the support element 05. In the illustrated arrangement of three first pillar pairs 12 and three other pillar pairs 15 results in three bulges 29, which shape the support member 05 star-shaped. Furthermore, stiffening ribs 30 between the upper ends 04 of the first legs 02 and the upper ends 17 of the other legs 15 and the construction 06, for example, the tower of a WEA, shown. Finally, in detail for the first intersection 13, a first crossing element 31 and for the further intersection 19, a further crossing element 32 is shown. Clearly, the straight course (angle 24 = 180 °) of the first legs 02 by the crossing element 31 and the angular course (obtuse angle 24) of the further legs 15 by the further crossing element 32 can be seen. Both crossing elements 31, 32 are formed as cast crossings 33. The first legs 02 and the other legs 15 are - as the first and further support struts 25, 26 - formed as a simple steel tubes 34 and end as leg sections 35 in the crossing elements 31, 32. There they are inserted and welded.

In the figure 6, the geometry of the truss stand structure 01 according to the invention is shown schematically. Shown are the upper ends 04 of the first legs 02, which lie on the top circle 10. Next to it are the upper ends 17 of the further legs 16, which are arranged on a top circle 36. In each case two upper ends 04 of the first legs 02 and two upper ends 17 of the further legs 16 lie on the horizontal line 27 along the support element 05. The lower ends 07 of the first legs 02 are on the root 11. The lower ends 18 of the other legs In each case, a lower end 07 of the first legs 02 and a lower end 18 of the other legs 16 lie on the vertical line 28 along the foundation element 09. Furthermore, the planes defined by the first legs 02 and 21 by the other legs 16 defined planes 22 located. It can clearly be seen that the planes 21, 22 do not touch each other, which is why they introduce the forces parallel into the ground 08. The planes 21, 22 each intersect the truncated cones, each extending between the top circles 10, 36 and the foot circuits 1 1, 37 extend. The planes 21, 22 are thus inclined to the vertical center axis 03. It is also clearly visible in the figure 6 that the planes 21, 22 depending on the position of the upper ends 04, 17 and the lower ends 07, 18 of the first and other legs 02, 16 include an angle between them or parallel to each other can run. Shown is an angle between the planes 21, 22.

Finally, FIG. 7 shows a simplified representation of the truss stand structure 01 according to the invention in accordance with FIG. 1 with respect to the reference symbols. To better illustrate the specific geometry, the first standpoints leg pairs 12 from the first legs 02 horizontally hatched and the other pillar pairs 15 from the other legs 16 shown horizontally and vertically hatched. The first intersections 13 and the further intersections 19 are shown in black.

LIST OF REFERENCE NUMBERS

01 Truss structure

02 first leg

03 vertical central axis

04 upper end of 02

05 support element

06 construction

07 lower end of 02

08 underground

09 foundation element

10 head circle from 04

1 1 foot circle from 07

12 first leg pair from 02

13 first crossing of 02

14 mid of 02

15 further leg pair from 16

16 additional mainstay

17 upper end of 16

18 lower end of 16

19 more crossing of 16

20 mid of 16

21 level of 02

22 level of 16

23 virtual truncated cone

24 angles between 02, 16

25 first support strut between 02

26 additional strut between 16

27 horizontal line for 04, 17

28 vertical line for 07, 18

29 bulge in 05

30 stiffening rib first crossing element for 13 additional crossing element for 19 cast intersection

steel tube

Pillar section

Head circle of 17

Foot circle of 18

Claims

claims

1 . Truss stand structure (01) with at least six, regularly around a vertical central axis (03) arranged around first legs (02), with their upper ends (04) with a support element (05) for supporting a construction (06), for example a Wind turbine, and with its lower ends (07) with a substrate (08) for establishing the framework stand structure (01) are connected, wherein the first legs (02) with their upper ends (04) in the direction of the vertical center axis (03 ) are inclined and two first legs (02) intersect each other and form a first leg pair (12) with a first junction (13) which is above the center (14) of the first legs (02),

characterized in that in the direction of the vertical central axis (03) in front of or behind each first pillar pair (12) another leg pair (15) of two further legs (16) is arranged, which also with their upper ends (17) in the direction the vertical central axis (03) inclined and with the support element (05) and with their lower ends (18) are connected to the ground (8) and cross each other in another intersection (19) below the center (20) of the further legs (16), wherein the first and further pillar pairs (12, 15) are connected neither directly nor indirectly by supporting struts.

2. framework stand structure (01) according to claim 1,

characterized in that the first legs (02) of each first pillar pair (12) through the first intersection (13) are rectilinear.

3. framework stand structure (01) according to claim 1 or 2,

characterized in that the further legs (16) of each further pillar pair (15) extend at an angle through the further intersection (19).

4. framework stand structure (01) according to at least one of the preceding claims,

characterized in that the support element (05) is formed star-shaped and a plurality of bulges (29) for connection to the upper ends (04, 17) of a respective first and a further leg (02, 16) of two first and further pillar pairs ( 12, 15).

5. framework stand structure (01) according to at least one of the preceding claims,

characterized in that in the ground (08) anchored at least three foundation elements (09) for connection to the lower ends (07, 18) of a respective first and another leg (02, 16) of two leg pair (12, 15) provided are.

6. framework stand structure (01) according to at least one of the preceding claims,

characterized in that the first and / or further intersections of first and / or further crossing elements (31, 32) are formed, in which portions of the first and / or further legs (02, 16) from the first and / or further pillar pairs ( 12, 15) end.

7. truss stand structure (01) according to claim 6,

characterized in that the first and / or further

Crossing elements (31, 32) as cast crossings (33) are formed.

8. truss stand structure (01) according to at least one of the preceding claims,

characterized in that between the first legs (02) and / or between the other legs (16) first and / or further support struts (25, 26) are arranged.

9. framework stand structure (01) according to claim 8,

characterized in that the first and / or further support struts (25, 26) are arranged horizontally.

10. framework stand structure (01) according to at least one of the preceding claims,

characterized in that the first and / or further legs (02, 16) and / or the first and / or further support struts (25, 26)

Steel tubes (34) are formed.