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 steel, concrete, and wood. Cantilever beams are widely used in construction, such as in bridges, balconies, and overhangs. Their ability to carry loads while projecting into space makes them efficient for creating open and unobstructed areas. Proper design and engineering are essential to ensure they can safely support the intended loads.