Fastening rail and concrete element having a fastening rail

A fastening rail for embedding in a concrete element, the fastening rail comprising:

• a fastening rail body defining a rail longitudinal direction;
• said fastening rail body having one rail back, two rail lips and two rail longitudinal sides disposed opposite one another and extending in the rail longitudinal direction;
• said rail longitudinal sides each having a first side facing away from said rail back;
• each of said rail lips extending on said first side of said rail longitudinal sides and projecting toward one another from corresponding ones of said rail longitudinal sides;
• said rail lips delimiting a slot between each other;
• said rail lips having a rail lip outside which faces away from said rail back;
• the fastening rail being configured in an anchorless manner;
• said fastening rail body forming at least one undercut from said rail back in the direction of said rail lip outside;
• said rail longitudinal sides each having a longitudinal outside;
• said rail back having a rail back outside which faces away from said rail lips;
• said fastening rail body having an outside surface which is formed by said rail back outside of said rail back and said longitudinal outsides of said rail longitudinal sides;
• said outside surface being provided for contact with the concrete of the concrete element;
• said outside surface being provided at least in part with a profiling;
• said profiling being formed by a plurality of indentations in said outside surface;
• adjacent ones of said indentations defining a center-to-center distance (g);
• said indentations having a depth (f);
• and,
• a ratio of said center-to-center distance (g) of adjacent indentations to said depth (f) of the indentations being between 2 and 6.