An H-beam, also known as an H-section or I-beam, is a structural steel beam shaped like the letter "H" when viewed from the end. It consists of two horizontal flanges connected by a vertical web, providing strength and stability. H-beams are commonly used in construction and engineering for building frameworks, bridges, and other structures due to their ability to support heavy loads. The design of H-beams allows for efficient use of material, making them lighter than solid beams while maintaining high strength. They are often made from steel and can be found in various sizes to suit different applications, contributing to the overall safety and durability of structures.