SUPPORTING FRAMEWORK

Abstract

A supporting framework having at least one connector and at least two bars arranged on the connector. The bars are preferably arranged on the connector at the longitudinal end regions thereof. The connection between the bars and connector is achieved by at least one bolt, in particular, by two bolts. The bolt is or the bolts are preferably designed in the form of plug-in bolts, in particular fit bolts. The bolt has or the bolts have preferably a diameter of more than 28 mm that acts in the connection to the connector. The bars are formed from a steel having an upper yield strength of above 490 MPa. The bar height is less than 200 mm. The bars, bolts, and connector are preferably part of a lattice truss of the supporting framework, wherein the lattice truss has a lattice truss height of at least 2100 mm.

Claims

1-13. (canceled)

14. A supporting framework for bearing an allowable pressure force of between 100 and 1000 kN per scaffolding post, the supporting framework comprising: scaffolding posts arrangeable on the ground; a connector; at least two bars; and at least two bolts, wherein the at least two bars are each arranged on the connector reversibly and releasably by at least one of the bolts, wherein a) the at least two bars are composed of steel having an upper yield strength of more than 490 MPa, and b) a height of the bars, as measured perpendicular to a longitudinal axis of the at least two bolts and perpendicular to a longitudinal axis of the at least two bars, is less than 200 mm, wherein c) the at least two bolts are each configured as a plug-in bolt.

15. The supporting framework according to claim 14, wherein the supporting framework is configured to bear an allowable pressure force of between 200 and 600 kN per scaffolding post.

16. The supporting framework according to claim 14, wherein the at least two bars are composed of a steel having an upper yield strength of more than 540 MPa, and the bar height is less than 120 mm.

17. The supporting framework according to claim 14, wherein the at least two bars each have two U-profiles that are indirectly interconnected at middle bottom regions of the U-profiles, wherein the connector is plate-shaped and accommodated in some sections between the U-profiles.

18. The supporting framework according to claim 14, wherein the connector is semicircular and has at least seven coupling points for connecting the bars to the connector, wherein the coupling points are offset in each case by 30 from an adjacent coupling point.

19. The supporting framework according to claim 14, wherein at least a part of the bars is rolled,

20. The supporting framework according to claim 14, wherein the at least two bolts each have a bolt diameter of more than 20 mm, and the at least two bars are each arranged on the connector by fewer than three of the bolts.

21. The supporting framework according to claim 20, wherein the at least two bolts each have a bolt diameter of at least 30 mm.

22. The supporting framework according to claim 14, wherein the at least two bolts are each configured as a fit bolt.

23. The supporting framework according to claim 14, further comprising a lattice truss having a plurality of bars and a plurality of connectors, wherein the lattice truss has a height, as measured perpendicular to a longitudinal axis of the lattice truss, greater than 2200 mm.

24. The supporting framework according to claim 14, wherein the supporting framework is configured as a bridge.

Description

[0025] In the drawings,

[0026] FIG. 1 illustrates a plant view of a bridge according to the invention, with a lattice truss according to the invention;

[0027] FIG. 2 illustrates a section from FIG. 1 that shows a connector with four bars arranged thereon;

[0028] FIG. 3 illustrates the section from FIG. 2, wherein two bars have been removed from the connector; and

[0029] FIG. 4 illustrates a section view of a bar from FIG. 3 along the line IV-IV.

[0030] FIG. 1 illustrates a bridge 10. The bridge 10 comprises scaffold towers 12a, 12b. The scaffold towers 12a-b span a square base. The bases each have a side length L.sub.s of between 1000 and 2000 mm. The height H.sub.G of the scaffold towers is up to 25000 mm. The span S.sub.w of the bridge 10 is up to 25000 mm.

[0031] The bridge has at least one lattice truss 14 that is arranged between the scaffold towers 12a-b. Preferably, the bridge 10 has a plurality of lattice trusses 14 that are arranged in parallel to one another and are arranged between the scaffold towers 12a, 12b. The lattice truss height F.sub.H of the lattice truss 14 is preferably 2500 mm. The longitudinal axis of the lattice truss 14 is marked with the reference sign 15 in FIG. 1.

[0032] The scaffold towers 12a, 12b have scaffolding posts 16a, 16b, 16c, 16d that are supported at the bottom. The bridge 10 is configured in order to support an allowable pressure force of up to 400 kN via the scaffolding posts 16a-d. The bridge 10, which is schematically represented in FIG. 1, therefore involves a supporting framework 18 for a medium load range.

[0033] FIG. 2 shows a section 20 from FIG. 1. FIG. 2 is depicted as an example of a node of the lattice truss 14 (see FIG. 1). FIG. 2 illustrates a connector 22. The connector 22 is plate-shaped and has semicircular shape. Bars 24a, 24b, 24c, 24d are arranged on the connector 22. The bars 24a-d are arranged on the connector 22 through bolts 26a, 26b, 26c, 26d, 26e, 26f, 26g, 26h. The bolts 26a-h are in the form of fit bolts. The bolts 26a-h each have a safety splint (not shown) in order to secure the bolts 26a-h.

[0034] The bars 24a-d are composed of S550MC steel, in order for the bars 24a-d to be configured with a small cross-section. As an alternative thereto, the bars 24a-d may preferably be composed of S500MC steel, S600MC steel, S650MC steel, S700MC steel, S900MC steel, or S960MC steel. Due to the small cross-section thereof, the bars 20a-d are relatively light so as to allow for assembly and disassembly by workers without requiring aid from a crane.

[0035] FIG. 3 illustrates the section 20 according to FIG. 2 with the connector 22, but without the bars 24c, 24d arranged on the connector 22 (see FIG. 2). Coupling points 28a, 28b, 28c, 28d, 28e, 28f, 28g are configured in the connector 22 in order to connect bars, e.g., the bars 24a, 24b to the connector 22, The coupling points 28a-g each have at least one through recess. Preferably, the coupling points 28a-g each have two through recesses, as shown in FIG. 2, wherein reference signs are provided in FIG. 3 only to the through recesses 30a, 30b of the coupling point 28c for the sake of better visibility.

[0036] The through recesses of the coupling points 28a-g, e.g., the through recesses 30a, 30b of the coupling points 28a-g, each lie on lines that intersect in the center of the semicircular shape of the connector 22. For the sake of better visibility, a reference sign is provided in FIG. 3 only to a first such line 32 of the coupling point 28c. The coupling points 28a-g are each offset by 30 to the nearest adjacent coupling point 28a-g in the semicircular shape of the connector 22. The bars 24a, 24b each have through recesses at longitudinal ends thereof, in order to receive the bolts 26a-h (see FIG. 2). FIG. 3 depicts only a first through recess 34 of the bar 24a, for the sake of better visibility. The longitudinal axis of the bar 24a is marked in FIG. 3 with the reference sign 35.

[0037] FIG. 4 illustrates the cross-section of the bar 24b (see FIG. 3). FIG. 4 makes it clear that the bar 24b has U-profiles 36a, 36b. The U-profiles 36a, 36b are welded together via connecting plates 38a, 38b. In other words, the two U-profiles 36a, 35b are connected indirectly to one another at middle ground regions 40a, 40b thereof. The U-profiles 36a, 36b have a significantly reduced wall thickness in comparison to the prior art. In the longitudinal direction of the bar 24b, a plurality of connecting plates 38a, 38b that are spaced apart from one another in the longitudinal direction of the bar 24b may be arranged between the U-profiles 36a, 36b. The U-profiles 36a, 36b have a bar height H of less than 110 mm. This makes the bar 24b especially easy to handle. A longitudinal axis of a bolt (not shown) connected to the bar 24b in order to arrange the bar 24b with another connector (not shown) is provided with the reference sign 42 in FIG. 3.

[0038] To summarize all of the drawings, the invention relates in summary to a supporting framework 18 having at least one connector 22 and at least two bars 24a-d arranged on the connector 22. The bars 24a-d are preferably arranged on the connector 22 at respective longitudinal end regions thereof. The connection between the bars 24a-d and the connector 22 is achieved by at least one bolt 26a-h, in particular, by two bolts 26a-h. The bolt 26a-h is or the bolts 26a-h are preferably designed in the form of plug-in bolts, in particular, in the form of fit bolts. The bolt 26a-h has or the bolts 26a-h have preferably a diameter of more than 28 mm that acts in the plug-in connection to the connector 22. The bars 24a-d are formed from a steel having an upper yield strength of above 490 MPa. The bar height RH is less than 200 mm. The bars 24a-d, bolts 26a-h, and connector 22 are preferably part of a lattice truss 14 of the supporting framework 18, wherein the lattice truss 14 has a lattice truss height F.sub.H of at least 2100 mm.