The Hartford Arena, with a seating capacity of 5000 spectators was completed in 1973. While computer use is an integral part of design and analysis nowadays, the construction of the Hartford Arena involved one of the earliest applications of computers to the analysis of complex frame structures. The arena used only four columns to support the roof and this minimized obstruction for spectators. The roof was a three-dimensional truss structure about 3 m deep, and approximately 91m by 110 m, suspended about 25 m above the ground.