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A bridging device in center girder construction for a building joint between two building components having at least two edge girders and at least one center girder arranged between the edge girders and on at least one cross member bridging the building joint that each have a cross member bearing fo

A bridging device in center girder construction for a building joint between two building components having at least two edge girders and at least one center girder arranged between the edge girders and on at least one cross member bridging the building joint that each have a cross member bearing for bearing the cross member on the respective building components at their lateral ends. The object of the present invention is to provide a novel bridging device that is formed in particular space-saving. The initially described bridging device has a cross member having at least two cross member segments arranged along a longitudinal axis of the cross member and arranged displaceable relative to each other toward the longitudinal axis, so the length of the cross member is variable.

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1. A bridging device for a building joint between two building components, the bridging device comprising: at least two edge girders;at least one center girder arranged between the at least two edge girders; andat least one cross member bridging the building joint, each of the at least one cross mem

1. A bridging device for a building joint between two building components, the bridging device comprising: at least two edge girders;at least one center girder arranged between the at least two edge girders; andat least one cross member bridging the building joint, each of the at least one cross member having a cross member bearing for bearing lateral ends of the at least one cross member on the respective building components,wherein each of the at least one cross member has at least two cross member segments arranged along a length of the at least one cross member, the at least two cross member segments being displaceable relative to each other, such that the length of the at least one cross member is variable, wherein the cross member bearings allow pivotal movement between the at least one cross member and the edge girders which rest thereon. 2. The bridging device according to claim 1, wherein at least one of the at least two cross member segments includes a guiding segment and a rodding segment, and the guiding segment guides the rodding segment along a longitudinal axis of the at least one cross member. 3. The bridging device according to claim 2, wherein the guiding segment includes a tube in which the rodding segment is displaceably received. 4. The bridging device according to claim 2, wherein the guiding segment has at least one tongue that extends parallel to the longitudinal axis of at least one the cross member and that engages a groove in the rodding segment. 5. The bridging device according to claim 2, wherein the guiding segment includes a U-shaped clamp or an H-shaped double clamp, the guiding segment laterally enclosing the rodding segment and holding the rodding segment transversally to the longitudinal axis of the at least one cross member. 6. The bridging device according to claim 2, wherein the rodding segment is formed as a massive and/or hollow girder. 7. The bridging device according to claim 6, wherein the rodding section includes a T girder, double T girder, or a box section tubing. 8. The bridging device according to claim 1, wherein the at least one center girder comprises at least two center girders having upper surfaces oriented flush with each other. 9. The bridging device according to claim 1, wherein the at least one center girder is arranged on a guiding segment and/or a rodding segment of the at least one cross member. 10. The bridging device according to claim 1, wherein the at least one center girder is supported on the at least one cross member toward a longitudinal axis of the at least one cross member. 11. The bridging device according to claim 1, wherein the at least one center girder has a center girder bearing that allows bearing of the at least one center girder both above a guiding segment and a rodding segment at the same height. 12. The bridging device according to claim 11, wherein the at least one center girder bearing only rests on one rodding segment or one guiding segment and does not touch an adjacent cross member segment. 13. The bridging device according to claim 12, wherein the at least one center girder bearing has a U-shaped design. 14. The bridging device according to claim 1, wherein the at least one center girder has a center girder bearing that allows rotational motion of the at least one cross member below the at least one center girder. 15. The bridging device according to claim 1, wherein the at least one cross member is obliquely arranged in the bridging device. 16. The bridging device according to claim 1, wherein at least one of the cross member bearings comprises a spherical bearing. 17. The bridging device according to claim 1, wherein the at least one cross member comprises a plurality of cross members spaced from each other. 18. The bridging device according to claim 17, wherein adjacent cross members of the plurality of cross members are arranged substantially spaced in parallel. 19. The bridging device according to claim 17, wherein cross members of the plurality of cross members are arranged in pairs. 20. The bridging device according to claim 1, wherein the at least one center girder is attached on a single cross member segment. 21. The bridging device according to claim 1, wherein the at least one cross member is configured to rotate under the at least one center girder to control distances between the at least one center girder and the at least two edge girders. 22. The bridging device according to claim 1, further comprising a control device comprising springs arranged between the at least two edge girders and the at least one center girder, the control device being configured to control a distance between the at least one center girder and the at least two edge girders. 23. The bridging device according to claim 1, wherein a center girder bearing or at least one of the cross member segments has at least one abutment for limiting the movement of the at least one center girder on the at least one cross member. 24. The bridging device according to claim 1, wherein the at least one center girder is attached only on guiding segments.