Steel Wire Rope Selection And Maintenance For Suspended Platforms What specifications exist for suspended platform wire rope? How to select? Suspended platform wire ropes follow standardized specifications globally. The 6x19S+IWR (Independent Wire Rope Core) construction is the industry standard—6 outer strands of 19 wires each around an IWRC central core provides optimal flexibility and durability for repeated bending over winch drums. Alternative constructions include 6x36S+IWR for higher flexibility requirements (larger drum diameters), and 18x7 non-rotating ropes for specific applications requiring reduced torque. Diameter selection: 6mm ropes suit standard platforms up to 400kg capacity at heights under 100m—breaking force approximately 30-35kN. 8mm ropes handle capacities 400-800kg or heights exceeding 150m—breaking force approximately 50-60kN. 10mm ropes for heavy-duty applications exceeding 800kg or extreme heights—breaking force approximately 70-85kN. Wire rope se...