Post-Tensioned Design is a construction method where steel tendons are stretched and anchored within concrete to enhance its structural strength and performance. This technique helps reduce cracking, increases durability, and allows for longer spans and thinner slabs. It is commonly used in bridges, high-rise buildings, and large concrete structures, providing improved flexibility, stability, and efficiency in design. Post-tensioning can be applied in various forms, including internal, external, bonded, and unbonded systems, depending on the project requirements.