Metal building systems roofs are designed to shed water. Programs can now be easily standardized to fit the structural types, standard loads, and load combinations that had formerly been laboriously cranked out on a desk calculator. The structural analysis, design, bill of material, fabrication drawings, and erection drawings are usually produced by computer. Metal building systems construction takes place in the factory, a process which improves quality, reduces waste, and saves on typical job site material costs. Metal systems design and fabrication saves up to a third of the construction and erection time of non-metal buildings.
Occupancy can occur sooner.
Manufacturers test their products. Buildings are packaged and shipped to the jobsite. Further savings are realized because a less extensive foundation is required by metal building framing systems with walls that are nonload bearing. The American Institute of Steel Construction comprehensive program for the metal building systems industry requires a rigorous third-party examination of a manufacturer's engineering and manufacturing policies and procedures, as well as its quality assurance and control standards. Flush wall clear span-20 feet to 70 feet and wider 2.