... 1570mpa 3.Standard:GB,ASTM 4.Used for: railway and highway bridge, roof truss Prestressed Concrete Steel Wire 1.Diameter:4. ... .0mm2.Strength:1570mpa3.Standard:GB,ASTM4.Used for: railway and highway bridge, roof truss High strength, low slack, delivered in coils, ... tensioning and Post-tensioning methods, e.g. major railway and highway bridge, roof truss, crane beam, prefabricated slab for industrial and ...