Home / Standards / GB/T 6728-1986 GB/T 6728-1986 Cold-formed hollow sectional steel for general structure—Dimensions, shape, weight and permissible deviations 结构用冷弯空心型钢 尺寸、外形、重量及允许偏差 代替 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A