... I beam 1. Material : SS400, ST37-2 , A36, S235 JRG1, Q235, Q345 etc. 2. Length : 6 meter, 9 ... meter 3. Technology: hot rolle I beeam steel1. Material : SS 400, ... ST37-2 , A36, S235 JRG1, Q235, Q345 etc.2. Length : 6 meter, 9 ... . Standard : GB/T 700-1988 I BEAM SPECIFICATIONWaist HeightLeg WidthWaist ThicknessAverage Waist ThicknessTheoretical ...