The guide rail adopts hot-dip galvanized and hard rolled steel structure, cold-formed S250GD + Z275-M-A-C plate, the material complies with DIN EN 10147 (material specification) and DIN EN10143 (Dimensional tolerance), galvanized surface treatment (140g/m2, 9.8μm thickness), double-sided application Hot-dip galvanizing outside the weld seam. Note: Do not use the safety clamp together with the guide rail on the counterweight side.