Topped out in May 1997, the $97 million Charles Evans Whittaker U.S. Courthouse in Kansas City, Mo., is already being called one of the city's most impressive landmarks. The 587,000-square-foot C-shaped concrete-frame building was built using 20-inch-deep by 66-inch-wide pan forms, with joists and beams that clear span up to 50 feet. The structure required more than 4,500 tons of reinforcing steel and 46,000 cubic yards of concrete.