Rinker Materials, 6961 Highway Ave, Jacksonville, FL 32254, US

For over 30 years, Oldcastle Precast Inc. has been one of the leading manufacturers of precast concrete, polymer concrete and plastic products in the United States. Based in Jacksonville, Fla., it has more than 80 locations nationwide. The firm offers a range of products, such as building systems modules, precast building systems, communication structures, convault, drainage storm water, retaining wall systems and specialty products and services, among others. Its project list includes Pine Glades, George Poston Park, Twin Falls Irrigation Canals, Boys & Girls Clubs in Arizona and Cleveland's New StarTrack Rail System.