Prestressed concrete is a type of concrete in which certain stresses are applied to the concrete before it is subjected to any load or pressure during its use in construction. This is usually done by tensioning steel wires or rods into the concrete using special devices, and then the concrete is held in a prestressed position. Then, when loads are applied to the concrete during its use, these initial stresses enhance its ability to carry loads better. Advantages: Increased endurance: Helps to withstand heavy loads and high pressures. Reduce cracks: It helps reduce cracks that may appear as a result of heavy loads. Use less material: It can help reduce the amount of concrete and steel required compared to regular concrete. Greater resistance to tension: Prestressed concrete is more resistant to tensile forces than regular concrete. Uses: Bridges: Commonly used in bridges, where concrete must withstand huge loads. Tunnels: Also used in the construction of tunnels and underground passages. High-rise buildings: They may be used in the construction of tall buildings that require high load-bearing capacity.