Home / Standards / GB/T 39056-2020 GB/T 39056-2020 Active Technical code for maintenance and strengthening of masonry structures on ancient buildings 古建筑砖石结构维修与加固技术规范 Standard Type GBT ICS 01.140.30 CCS A10 Status 现行 Issue Date 2020-09-29 Implementation 2020-09-29 Responsible Dept 国家文物局 Drafting Unit N/A