H-Beam Wide Flange Beam | WF ASTM A36 mild steel( Q235) Wide flange beam is also known as H-beam due to their distinctive shape, similar to a capital letter “H” when viewed at the cross-section. This shape is very efficient bending for carrying loads of weight without bending. Wide flange beams are structural support materials that are primarily used for building. Able to bear excessive amounts of pressure, they ensure structural integrity and stability. The thickness of the wide flange beam will determine the type of jobs it is best suited for. It is important to consider the force applied, the weight carried, and the tension and compression.