Tech-Info: What is the strand structure of wire ropes

The main types of strand construction are the one, two and three layer standard strands, as well as the parallel lay strands of the Seale, Filler, Warrington and Warrington-Seale construction types.The two and three layer standard strands have crossovers between the wires of the different wire layers. Here, the wire layers are stranded in separate operations in the same direction (abbreviation N) with the same stranding angle but different lay lengths. The so-called parallel lay strands (Seale, Filler, Warrington, Warrington-Seale) avoid the crossovers and instead create line contacts of the wires by stranding all wire layers with different stranding angles but the same lay length.