Precast RCC/Pre-stressed beams are advantageous for fast constructions as no propping of beams are required. There is no need for expensive on-site formwork and flexibility with design is also possible. The main advantage of a precast beam structure is that it permits less structural depth for a given load-bearing capacity. Precast beams are manufactured in a variety of sizes, shapes and lengths. The concrete surface is smooth and the edges are chamfered.