A cantilever structure is a type of construction that is supported on one end while the other end extends freely into space. This design allows for overhanging sections without the need for additional support underneath. Common examples include bridges, balconies, and certain types of roofs. The key to a cantilever's stability lies in its ability to balance forces. The anchored end bears the load, while the free end experiences tension and compression. Engineers often use materials like steel and reinforced concrete to enhance strength and durability, making cantilevers a popular choice in modern architecture and engineering.