Rinker Materials Corporation is one of the largest producers of heavy building materials in the United States with principal operations in Florida and Arizona, as well as additional operations in more than 25 U.S. states. The company is also one of the leading manufacturers and importers of cement in Florida. It manufactures crushed stone, ready-mixed concrete, asphalt, and concrete block and pipe. Rinker Materials Corporation distributes chemicals, reinforcing steel, and masonry, quarry, drywall and acoustical products. Its services include environmental, export, steel framing, stormwater treatment, technical and transport services. The company has a staff of over 10,000 people. Rinker Materials Corporation is a wholly owned subsidiary of Rinker Group Limited based in Australia.