Longitudinal joint

A longitudinal joint forming a longitudinal joint surface usable as a passage between a first passage surface and a second passage surface adjacent to one another, and usable as a walking user passage, the distance between the first passage surface and the second passage surface in the longitudinal direction being variable, said longitudinal joint comprising:

• a plurality of transverse slats attached to one another, having a substantially planar upper surface, each of said transverse slats being attached to contiguous transverse slats by a pivot point with respect to which said transverse slats can rotate, maintaining continuity of the longitudinal joint surface;
• a first intermediate surface attached to the first passage surface, and a second intermediate surface attached to the second passage surface, configured for supporting the transverse slats, at least part of the second intermediate surface resting on the first intermediate surface, a support area between the first intermediate surface and the second intermediate surface being variable depending on the distance between the first passage surface and the second passage surface;
• curved support surfaces attached directly to the first passage surface, wherein the transverse slats further rest on the curved support surfaces;
• and
• wherein the first passage surface comprises an inclined lower surface at an end, a plurality of the transverse slats being hidden under said first passage surface, below a level of the upper surface of the longitudinal joint, by the relative rotation of the slats to one another with respect to the pivot point, depending on the distance between the first passage surface and the second passage surface.