A brief introduction to the materials used in wire ropes and stranded wires
"LH" refers to a stranded wire in which the individual strands are twisted to the left, while "RH" refers to wires with the strands twisted to the right.
When these stranded wires are then twisted together, you obtain a wire rope.
A wire rope is a right-hand Lang's lay rope (RHLL) when the individual strands in the wire and the stranded wires are wound in the same direction. In a left-hand ordinary lay (LHOL), the individual strands in the wire are wound in the opposite direction of the stranded wires.
The lay length is the distance parallel to the center line in which a stranded wire makes one complete turn around the rope.