Abstract: A profiled rail has two opposite side walls (13) at least one connection wall (16) for connecting the side walls (13), first and second openings (17, 37; 27, 47) for passing therethrough a connection element (6) and having, respectively, first and second opening widths (B; F; C; G) measured in a direction perpendicular to a longitudinal profile axis (12) of the profiled rail, with a minimal distance (A; E) between the opposite wall sections (14; 34) of the side walls (13; 33), which is measured in the direction perpendicular to the longitudinal profile axis (12) of the profiled rail, at most corresponding to the opening width of (B; F; C; G) the first and second openings (17, 37; 27; 47).