... 0mm 2.Strength:1570mpa 3.Standard:GB,ASTM 4.Used for: railway and highway bridge, roof truss Prestressed Concrete Steel Wire 1 ... :4.0mm~7.0mm2.Strength:1570mpa3.Standard:GB,ASTM4.Used for: railway and highway bridge, roof truss High strength, low slack, ... tensioning methods, e.g. major railway and highway bridge, roof truss, crane beam, prefabricated slab for industrial and civil construction,wall slab ...