Home / Standards / GB/T 28987-2012 GB/T 28987-2012 Active Standard methods for development of characteristic mechanical values for structural lumber 结构用规格材特征值的测试方法 Standard Type GBT ICS 79.040 CCS B69 Status 现行 Issue Date 2012-12-31 Implementation 2013-06-01 Responsible Dept 国家林草局 Drafting Unit N/A