System for fastening a rail, and tensioning clamp for a system of this type

A system for fastening a rail which has a rail foot, a web positioned thereon, a rail head and a carrying plate, the system comprising a tensioning clamp held on the carrying plate, the tensioning clamp having a central portion for bracing the tensioning clamp on the carrying plate, at least one torsion portion branching off from the central portion in a lateral direction, and a holding arm which is connected to the torsion portion via a curved transition portion, the holding arm extends, starting from the transition portion, counter to the torsion portion and exerts, via a free end of its end portion, a resilient holding-down force on the rail foot of the rail to be fastened, the length of the torsion portion and the course of the transition portion being adapted to each other in such a way that at least the transition portion is guided without supports laterally past a region of the carrying plate that is associated with the central portion of the tensioning clamp, wherein the end portion of the holding arm is angled so as to point away from the torsion portion in such a way that it points, in an assembly position, in a direction of the web of the rail to be fastened.