Main Features These rail clamps are storm brakes suitable for high forces: from 250 to 1500 kN. They are self-blocking type; in case a force acts on the crane and tends to put the same into motion, they press on the rail sideways. This pressing gets stronger as the crane moves. The rail clamps can withstand horizontal force only. The value of forces indicated are calculated with friction coeff. of 0.25 (see after). As the real coeff. in normal conditions is much higher (approx 0,59 – TUV German register certificated), the rail clamps can generate higher forces. Higher safety and braking shoes life are guaranteed