prime hot rolled i beam 1. Grade:Q235B/SS400/Q345 2. Size:160*82*4.0mm 3. Weight: 10.05kg/m 4. Length: As Required hot rolled i beam1. Grade: Q235B/SS400 add boron2. Size:160*82*4.0mm3. The Features and Advantages:--- If bear the same press, then the IPEAA can save 10%-15% material.--- You can have more designs of the rooms if you use IPEAA than concrete.--- The IPEAA is light than the concrete, ...