Boeing’s high-profile expansion program for their Dreamliner program represented the largest single capital investment in South Carolina’s history. The focal point of the program is the 1.2 million sf Final Assembly Building (FAB), a LEED Gold facility. More than 18,000 tons of structural steel were used in its construction with the eleven 614-foot roof trusses. Boeing cites this facility as having the largest clear span of any building in the company’s inventory, 464 feet between support columns. The production floor is supported by fully operational administrative, personnel support, mechanical, and shop spaces located on five mezzanine levels running the length of both sides the building. Additional facilities constructed as part of this program included a Welcome Center (LEED Gold), a Cafeteria building (LEED Gold), a truck inspection building, a Central Utilities Building expansion, an entire flight and fuel line for plane ground services, and a Delivery Center (LEED Gold) where South Carolina-built 787s are delivered to customers from around the world. Boeing South Carolina is only the third site in the world to assemble and deliver twin-aisle commercial airplanes.