... ,Q 235B,SS400,etc. Product Attributes Related attributes of I-beam: other valid standards:JIS EN DINStandard:GB/T700-1998Weight measurement ... , JIS, EN, GB Detailed Description Detailed introduction to I-beam: I beam,.also called girder,is one kind of profiled bars which ... Beijing City, the capital of China, where is the heavy industrial area with the preferential development of iron and steel industry ...