Representing a new era in industrial architecture is this giant dome-structure at Baton Rouge, La., which serves as a regional tank car repair plant for the Union Tank Car company. Big enough to enclose a football field or a baseball park, the all-steel Dome has a diameter of 384 feet and rises to a height of 120 feet - as high as a 10-story building. Along with a similar dome that Union Tank Car has built at Wood River., Ill., the Baton Rouge plant is the largest circular building in the world without internal supports |