ASSEMBLY COMPRISING AT LEAST ONE RAIL AND A SUPPORT

The present invention relates to a group of at least two assemblies each comprising a support, at least one rail (4) and a plurality of devices (5) for attaching said rail (4) to said support, said support comprising a plurality of concrete blocks (6), each block (6) being one piece and comprising at least two grooves (7), said attachment devices (5) each comprising at least one head (8) arranged in a groove (7) of one of said blocks (6), said assemblies each comprising a running track part or a track switch, the running track parts or track switches of the first and second assemblies having different geometries, said group being characterised in that at least two blocks (6) are identical. The present invention also relates to a block as a spare or replacement part for a group according to the invention. The present invention finally relates to methods for installing a group according to the invention.