... /DIN and others. Usage:various construction structures I-beam /hot rolled i-beam / i beam steelDescription: I beam, also called girder, is one kind ... of profiled bars which is strip profiled steel with the "I" shape sections. The specification is usually expressed by middle height ... width (b) * middle width (d), for instance, "I 160*88*6", shows that I beam with 160mm bottom height, 88mm middle width ...