Steel messenger strand consists of six wires wrapped around a center wire. The most common variety is carbon steel with a zinc coating. The zinc coating provides cathodic protection (CP) to the steel, meaning that red rust is prevented even on the cut ends. Manufactured from high-grade carbon steel through 12 precision processes including heat treatment, acid pickling, and hot-dip galvanizing, these. The galvanized steel strands for optical fiber cables are made of high-quality carbon steel wire rods through a series of processes such as heat treatment, peeling, water washing, pickling, water washing, solvent treatment, drying, hot-dip galvanizing, post-treatment, and wire drawing into the. The galvanized steel strand for optical cable is one of the basic components used in the Fig-8 self-support optical fiber cables for communication. As the suspension wire component in the optical cable, it can bear the weight of the optical cable and the external load in the optical cable, and can. Our specifications include ASTM 475, which covers metallic-coated steel wire strands, and ASTM A228 (music wire) for optical cables. We also offer customized specifications upon request to meet specific needs. Our messenger wire adheres to specifications set by ASTM International, a global. National Strand is the largest US-Made and owned producer of guy and static stranded wire used in the Broadband and Telecom industry — the backbone connecting people around the world.