Home / Standards / GB/T 31039-2014 GB/T 31039-2014 Active Pretensioned spun concrete special-shaped piles 先张法预应力离心混凝土异型桩 Standard Type GBT ICS 91.100.30 CCS Q14 Status 现行 Issue Date 2014-12-05 Implementation 2015-12-01 Responsible Dept 中国建筑材料联合会 Drafting Unit N/A