@jacqueslees: Gantry Crane Runway Rail Clip Crane Rail Clip Fastening (Crane Rail Clamping Plate Fastening) Material Requirements The components are manufactured from high-strength low-alloy (HSLA) structural steel. The bolts are M20 × 50 mm, Grade 8.8 high-strength bolts, with a tightening torque of 256 N·m, and the assembly is capable of withstanding a maximum lateral force of 120 kN.