Big R Manufacturing, LLC is a national leader in developing engineered solutions in steel tracking grids, cattle guards, steel bridges, structural plate, corrugated metal structures, and retaining wall systems. Big R Manufacturing, LLC is a proud member of the AIL Group of Companies, and is certified by AISC. The company has been supplying prefabricated bridges and engineered products across America for more than 45 years. The company has handled more than 20,000 installations to date and produces over 300 bridges a year.