... used in a variety of building structures,the bridge,the support,etc.Steel I-BeamMaterial: Q195,Q235, Q345, SS400I-Beam can ... in a variety of building structures, the bridge,the support and so on.Standard: GB,ASTM,DIN,JIS,AISI,BSMaterial: Q195,Q235 ... )used for the bridge, vehicle construction.(3)used for the support, machinery and others.Our company meets the requirement of ISO9001 ...