Southeast Financial Center is a two-acre development in Miami, Florida, United States. It consists of a tall office skyscraper and its 15-story parking garage. It was previously known as the Southeast Financial Center (1984–1992), the First Union Financial Center (1992–2003) and the Wachovia Financial Center (2003–2011). In 2011, it retook its old name of Southeast Financial Center as Wachovia merged with Wells Fargo and moved to the nearby Wells Fargo Center. When topped-off in August 1983, it was the tallest building south of New York City and east of the Mississippi River, taking away the same title from the Westin Peachtree Plaza Hotel, in Atlanta, Georgia. It remained the tallest building in the southeastern U.S. until 1987, when it was surpassed by One Atlantic Center in Atlanta and the tallest in Florida until October 1, 2003, when it was surpassed by the Four Seasons Hotel and Tower, also in Miami. It remains the tallest office tower in Florida and the fourth tallest building in Miami. Structure Southeast Financial Center was constructed in three years with more than 500 construction workers. Approximately 6,650 tons of structural steel, 80,000 cubic yards of concrete and 7000 cubic tons of reinforcing steel bars went into its construction. The complex sits on a series of reinforced concrete grade beams tied to 150 concrete caissons as much as ten feet in diameter and to a depth of 80 feet. A steel space-frame canopy with glass skylights covers the outdoor plaza between the tower and low-rise building. The tower has a composite structure. The exterior columns and beams are concrete encased steel wide flanges surrounded by reinforcing bars. The composite exterior frame was formed using hydraulic steel forms, or "flying forms," jacked into place with a "kangaroo" crane, that was located in the core and manually clamped into place. Wide flange beams topped by a metal deck and concrete form the interior floor framing. The core is A braced steel frame, designed to laterally resist wind loads. The construction of one typical floor was completed every five days. The low-rise banking hall and parking building is a concrete-framed structure. Each floor consists of nearly an acre of continuously poured concrete. When the concrete had sufficiently hardened, compressed air was used to blow the forms fiberglass forms from under the completed floor. It was then rolled out to the exterior where it was raised by crane into position