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 applied along its length, with the fixed end providing stability. Commonly used in bridges, balconies, and overhangs, cantilever beams can efficiently carry heavy loads while minimizing material use. The bending moment in a cantilever beam increases as you move from the free end toward the fixed end. This means that the fixed end experiences the greatest stress. Engineers must carefully calculate these forces to ensure the beam's safety and performance in various applications.