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VORNBÄUMEN APPLICATION STRANDING TYPES LENGTH OF LAY, TYPE OF LAY AND DIRECTION OF LAY TECHNICAL NOTES II STRANDING TYPES CROSS-LAY Cross-laid strands consist of at least two layers of wire that are stranded in the same direction, and the wires of two superimposed layers cross and touch at specific points. PARALLEL LAY Parallel-laid strands consists of at least two wire layers that are all laid in one operation in the same direction. The lengths of lay of all wire layers are the same, and the wires from two superimposed layers are parallel, resulting in linear contact. Parallel lay ropes thus consist of at least two strand layers that are all laid helically around a rope core in a single operation. LENGTH OF LAY The length of lay of a strand is the lead of an external wire measured parallel to the strand's longitudinal axis as it makes a complete spiral around the axis of the strand. TYPE OF LAY AND DIRECTION OF LAY LANG LAY The wires in the strands have the same direction of lay as the strands in the rope. Lang lay Lang lay Right-hand zZ Left-hand sS ORDINARY LAY The wires in the strands have the opposite direction of lay as the strands in the rope. Ordinary lay Ordinary lay Right-hand sZ Left-hand zS Length of lay See EN 12385-2
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