An I-beam, also known as H-beam (for universal column, UC), w-beam (for “wide flange”), universal beam (UB), rolled steel joist (RSJ), double-T is a beam with an I H-shaped cross-section. The horizontal elements of the “I” are known as flanges, while the vertical element is termed the “web”. Our I-beams are made of structural steel are used in construction civil engineering.