Outer wires: All wires positioned in the outer layer of wires in a spiral rope or in the outer layer of wires in the outer strands of a stranded rope.   Inner wires: All wires of intermediate layers positioned between the center wire and outer layer of wires in a spiral rope or all other wires except center, filler, core and outer wires of a stranded rope.   Core wires: All wires of the core of a stranded rope.   Centre wires: Wires positioned either at the center of a spiral rope or at the centers of strands of a stranded rope.   Layer of wires: An assembly of wires having one pitch circle diameter. The exception is Warrington layer comprising alternately laid large and small wires where the smaller wires are positioned on a larger pitch circle diameter than the larger wires. The first layer is that which is laid immediately over the strand center.   Note: Filler wires do not constitute a separate layer.   Tensile strength grade of wires: A level of requirement of tensile strength of a wire and its corresponding tensile strength range. It is designated by the value according to the lower limit of tensile strength and is used when specifying wire and when determining the calculated minimum breaking force or calculated minimum aggregate breaking force of a rope.   Wire finish: The condition of the surface finish of a wire, e.g. bright, zinc coated.