Denver International Airport Great Hall Jigsaw Puzzle Denver International Airport Great Hall If your spring break plans are taking you through DEN, look up! The state-of-the-art membrane roof in the Great Hall of Denver International Airport provides a strong, wide-open span over the newly improved ticketing and security space at Jeppesen Terminal. Read about the frame conversion and slab extension that transformed the Great Hall--while the airport remained open--at aisc.org/airport-overhaul.