... standard size: 80*46*3.8mm-600*220*12mm I-beam steel, I beam bar, I beam iron, steel I beam, Iot rolled I beam steel ... , Iot rolled I beam iron, Iot rolled I-beam ... bar, jis I-beam bar, jis I-beam iron, jis I-beam steel, steel I beam, mild I beam steel, mild I beam iron, mild I ...