... all products undergo a rigorous factory inspection and QS certified, so as to safeguard the interests of users SINCERITY: no ... ASTM A36,DIN STANDARD, EN STANDARD, etc All sizes from Size 20--Size 200CHANNELSpecification: JIS G3141,GB Q235--Q345 ... A36,DIN STANDARD, EN STANDARD, etc All Sizes from Size 100--Size 600 I—BEAMSpecification: JIS G3141,GB Q235-- ... :2011-2-16 18:05:59 channel steel 100*50*4.5*7.5