The Rib and Infill system has been used in residential and some commercial projects since the 1960's. This system offers an economical alternative to timber floors while achieving good STC and fire ratings. The Stahlton Engineered Concrete Rib and Infill system is easy to transport and has been used extensively throughout the Pacific Basin. The Rib and Infill system is particularly suited to fit complex geometrically shaped foot prints of residential and commercial projects.