sentences:  The upper-stage simulator (USS) was manufactured by NASA personnel at Glenn Research Center in Cleveland.Because of transportation limitations (bridge heights on highways and rivers), the simulator was built out of eleven steel segments 9.5 feet (2.9 m) tall by 18 feet (5.5 m) wide.The USS simulated the shape, mass, and center of gravity characteristics of Ares I from the interstage to the top of the service module of the Orion Crew exploration vehicle.