... .0mm 2.Strength:1570mpa 3.Standard:GB,ASTM 4.Used for: railway and highway bridge, roof truss High strength, low slack, ... and strongly bonded with spiral ribbed wire and concrete. used for fabricating pre-stressed concrete members of large, medium and ... tensioning methods, e.g. major railway and highway bridge, roof truss, crane beam, prefabricated slab for industrial and civil construction,wall slab ...