... .technology,hot rolled 2.Grade"Q235B,Q345B,SS400,SM490B steel H beams is a new production for construction and easy to ... be used with light weight, strong rigidity, high quality and fine appearance, After using Hbeams,30%-50%construction time ... be decreased compared with hot rolled sections. The usage of H beams:Certificates: ISO 14001,ISO 9001 1.Beams or columns ...