This U.S. industry comprises establishments primarily engaged in fabricating structural metal products, such as assemblies of concrete reinforcing bars and fabricated bar joists.

Cross-References. Establishments primarily engaged in--

• Manufacturing concrete reinforcing bars in an iron and steel mill--are classified in U.S. Industry 331111, Iron and Steel Mills;
• Manufacturing metal windows and doors--are classified in U.S. Industry 332321, Metal Window and Door Manufacturing;
• Manufacturing metal studs--are classified in U.S. Industry 332322, Sheet Metal Work Manufacturing;
• Constructing buildings, bridges, and other heavy construction projects on site--are classified in, Sector 23--Construction;
• Building ships, boats and barges--are classified in Industry 33661, Ship and Boat Building; and
• Prefabricating metal buildings, panels, and sections--are classified in U.S. Industry 332311, Prefabricated Metal Building and Compon ent Manufacturing.