GB/T 14370 Anchorage, grip and coupler for prestressing tendons*, 2015-09-11 Update
GB/T 50218 Standard for engineering classification of rock mass*, 2014-08-27 Update
GB/T 5224 steel strand for prestressed concrete*, 2023-08-06 Update
GB/T 6728 Cold forming hollow sectional steel for general structure*, 2017-07-12 Update
GB/T 8923.1 Preparation of steel substrates before application of paints and related products.Visual assessment of surface cleanliness.Part 1:Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coa
GB 50915-2013 history
2013GB 50915-2013 Code for design of underground opening of non-ferrous metals mine