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. These beams are commonly used in various types of buildings, including commercial and residential structures. They provide strong support for floors and roofs, and their design can be customized to meet specific engineering requirements. Precast beams are often part of a larger system that includes other precast components, such as precast slabs and precast columns.