A Post-Tensioned Slab is a type of concrete slab that uses high-strength steel tendons to enhance its structural performance. These tendons are placed within the slab and tensioned after the concrete has cured, allowing the slab to better resist bending and cracking. This technique is commonly used in large commercial buildings and parking structures. The process involves installing the tendons in ducts before pouring the concrete. Once the concrete hardens, the tendons are pulled tight and anchored at the edges of the slab. This method reduces the thickness of the slab and minimizes the amount of concrete needed, making it a cost-effective solution for construction projects.