Manufactured to EN12385-4 The choice of wire rope depends on the application and the safe working load that needs to be achieved. The construction of the rope refers to the ‘lay’ of the rope (either right hand or left hand), the tensile strength and the number of individual strands of wire in the rope itself. e.g. 7x19 wire rope (7 lots of 19 wires twisted together) is more flexible than a 7x7 wire rope and therefore more suited to use on a pulley or winch system. The main constructions of wire rope are either wire core or fibre core, the former being harder wearing.
Fibre Core 6x7, 6x19 and 6x36 FC (central fibre core)
Wire Core 7x7, 7x19, 19x7 (low rotation) and 6x36 IWRC (independent wire core)
Galvanised black rope supplied by Rope Assemblies Ltd is only available in 7x7 and 7x19 construction and is ‘blacked’ on top of the protective galvanised layer.
Wire rope is rated on its Minimum Break Load (MBL) requirements and the ultimate Actual Breaking Load (ABL) the safety factor is then determined by the actual use, e.g. general construction requires a safety factor of 4:1, the entertainment industry 8:1 and performer flying 10:1 and this gives the rope it’s Safe Working Load (SWL)
There are many speciality wire ropes available for specific applications lifts/elevators, excavators, marine and fishing to name a few.