Carolina Floors, Inc. with Leitner Construction at the Rock Hill, S.C., velodrome, one of three cycling tracks in the world that contain embanking of 43 degrees. This was approximately 20,000 sq. ft.; 1 ft. thick of hand truss screeded, high strength concrete foundation; with another 20,000 of hand mixed and screeded grout topping. Exceeding flatness over 1/8" in 6'.