With annual sales in excess of $100 million, United Structures Of America is among the 10 largest metal building manufacturers in the United States. United Structures markets it s products worldwide. It operates facilities in Houston; Portland, Tenn.; and Shanghai, China. The company consists of more than 500,000 square feet of manufacturing space. This allows United Structures to be very competitive in a variety of market areas in the United States and abroad. United Structures Of America offers a metal building product line plus Class 'A' structural fabrication, components, RetroRoof retrofit roofing and mini warehouses.