Pre-engineered metal buildings are a specialized form of design construct. It is also referred to as pre-engineered or system building. The building frames of pre-engineered metal building systems are constructed from a variety of structural steel and light-gauge steel framing members. The vertical members are supported on cast-in-place concrete footings. This construction mode is now applied to a wide range of building types, ranging from industrial applications to office buildings, retail centers, institutional buildings, and government-owned facilities. Pre-engineered buildings consist of standard modules. The producer now has the ability to custom-fabricate systems to fit specific project criteria. Manufacturers now fabricate complete metal buildings and multistory structural systems, including the framing, metal roof, walls, finishes, partitions and necessary subsystems. These pre-engineered packages are pre-sized, precut and pre-engineered to assemble into a fully integrated building unit. Pre-engineered steel buildings are popular for industrial applications. The common types of pre-engineered building available include truss-type, rigid frame, post-and-beam, and sloped roof.