Prestressing techniques are methods used in construction to enhance the strength and durability of concrete structures. This is achieved by applying a pre-compression force to the concrete before it is subjected to external loads. The two main types of prestressing are pre-tensioning and post-tensioning. In pre-tensioning, steel tendons are stretched before the concrete is poured, while in post-tensioning, tendons are tensioned after the concrete has cured. These techniques help reduce cracking and improve the load-bearing capacity of structures like bridges, buildings, and parking garages. By effectively managing tensile stresses, prestressing allows for longer spans and thinner slabs, optimizing material use and overall design efficiency.