Home / Standards / GB/T 5224 GB/T 5224 Active Steel strand for prestressed concrete 预应力混凝土用钢绞线 Standard Type GBT ICS 77.140.65 CCS H49 Status 现行 Issue Date 2023-08-06 Implementation 2024-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会