A cantilever beam is a structural element that is fixed at one end and free at the other. This design allows it to support loads along its length while extending beyond its support without additional bracing. Common materials used for cantilever beams include wood, steel, and concrete. Cantilever beams are widely used in construction, such as in bridges, balconies, and overhanging roofs. Their ability to carry loads while minimizing the need for support underneath makes them efficient for various architectural and engineering applications. Understanding the principles of cantilever beams is essential in fields like civil engineering and architecture.