PPWS is fabricated by high strength galvanized wire which is totally paralleled with a section of hexagon or other shape. Wrapping the wire bundle with high strength polyurethane tape. Fixing sockets to both ends of cable. It is widely used for main cable of suspension bridges and other suspended structure. The main size of PPWS are 5-61, 5-91, 5-127, 5-169 and among these sizes, 5-91 and 5-127 are mostly popular.