Fallout Shelter Equipment & Supplies Manufacturing is a subdivision of the Prefabricated Metal Buildings and Components Manufacturing industry. Companies in this industry are involved in the production of equipment and supplies necessary for the construction and maintenance of fallout shelters. These shelters are designed to protect individuals from the harmful effects of nuclear radiation in the event of a nuclear attack or accident. The industry involves the manufacturing of a range of products including ventilation systems, blast doors, radiation detectors, water filtration systems, and emergency power generators.