The arch bridge is one of important bridge with its low cost, beautiful shape and strong adaptability in development history of world bridges. Span of arch bridge is more than 550 meters at present.

　　In arch bridge, the horizontal force generated by arch is supported entirely or partly by tie cables. As one of the important components in arch bridge, tie cable should bear big horizontal pull, and it was called life line of arch bridge. There are two types of tie cable with rigid tie cable and flexible tie cable. Arranged outside of structure, the flexible tie cable made of high strength wires or strands generally is used as external prestressing cable. Compared to stay cable in cable-stayed bridge, the operating stress of flexible tie cable is about 0.5σb.

　　There were some bad examples of tie cable damaged in China. According to these examples, the main reason is their inferior anti-corrosion capability of existing tie cables. These tie cables would break affected by stress corrosion and electrochemical corrosion dually. It is the key point to solve the above question that improve anti-corrosion capability of tie cable and design according to load, anti-corrosion and construction.

　There are two types of FASTEN tie cable with XGK permanent and changeable types, these two types are all multi-strands system. FASTEN XGY permanent tie cable is a rigid tie cable buried in the girder which is made of FECS.B girt-impregnated epoxy-coated strand. FASTEN XGK changeable tie cable is a flexible tie cable used outside of structure which is made of FECS.S or FECS.SP, it can also used in external prestressing structure.