A beam is a line structural that carries load primarily in bending. Beams are characterized by their profile (the shape of their cross-section), their length, and their material. One of the most common types of steel beam is the I-beam or wide-flange beam. A visibly sagging beam, though structurally safe, is unsightly and to be avoided. A stiffer beam produces less deflection (degree to which structural element is displaced under a load).
Beam provide economical floor and roof systems in applications requiring long clear spans and lighter weight systems. The major applications are Bridges, Flyovers, Pedestrians Walk Overs and Buildings.