a composite profile comprising an extruded aluminum alloy carrier profile comprising a rail head having a longitudinal axis b , the rail head comprises a surface and two longitudinal edges extending parallel to the longitudinal axis b and a metal channel shaped profile strip comprising a base portion spanning the surface of the rail head and parallel side legs which lie on the longitudinal edges of the head rail , an insert rod is provided on the parallel side legs which lie on the longitudinal edges of the head rail and engage in lateral slots provided in the two longitudinal edges of the rail head , wherein the profile strip is attached to the carrier profile under mechanical pretension by way of a weld seam which contacts the rail head of the extruded aluminum alloy carrier profile .