Precast concrete is available in many shapes and sizes, including structural elements and unenforced pieces. Panels are the most common members used in building construction, and may serve as structure or cladding or both. As structural-architectural panels, they provide a cost effective solution to building enclosures. Panels can be full- or half-sandwich or hollow core construction. Full-sandwich panels are popular because they provide two durable faces and allow a space between that is filled with insulation. The half-sandwich panels contain just one concrete face and therefore require additional insulation and finishing after erection. Hollow core panels can be used for walls, but are especially well suited to floors. The cores can be used for utility chases or sometimes as ducts for heating, ventilation, and air conditioning (HVAC). Century has experience working with precast design and implementation and can make recommendations on utilizing the best tools for the job.