The Stranded Stainless Steel Tube OPGW is engineered for high-fiber-count requirements and high-voltage transmission lines that demand maximum mechanical flexibility. By stranding multiple fiber-filled stainless steel tubes around a central strength member, this design provides an unparalleled «spare capacity» for future network expansion. The helical stranding of the tubes around a central core provides a higher margin of safety for the fibers. When the cable stretches under extreme ice or wind loads, the fibers move freely within the stranded tubes, ensuring Safe Fiber Strain* even in high-tension spans.