· Clean Clay   · Land Chemic   · Rich Soil 　Construction Method   · Rich Tight 　Construction Method   · Construction 　Procedure Diagrams   · Major Installations HOME>..>Tracks and Multipurpose Courts Urethane Tracks & Multipurpose Basketball Courts   Urethane tracks and multipurpose basketball courts (for basketball, volleyball, Korean football, and badminton) proved to be efficient and safe, and are widely used as school playgrounds and sports facilities for other groups.