Precast beams are structural elements made from concrete that are cast in a controlled environment before being transported to a construction site. This method allows for better quality control and faster construction times, as the beams can be manufactured while site preparation is ongoing. Once delivered, precast beams are lifted into place using cranes and are often used in buildings, bridges, and other structures. They provide strength and durability, making them a popular choice in modern construction projects. Their design can be customized to meet specific load requirements and architectural needs.