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Chicago's new Comiskey Park used precast elements in its design and construction to keep down costs, speed construction, and beautify the ballpark. Kansas City-based architects Hellmuth, Obata & Kassabaum Sports Facilities Group (HOK Sport) planned the new ballpark to retain the old park's intimacy while offering state-of-the-art spectator services. Precast elements used in the project include: treads and risers for upper and lower grandstand on which seats are mounted--main deck seats are cast in place; raker beams and columns on lower grandstand; vomitory walls in upper grandstand; all architectural panels, inside and out; all structural members for six pedestrian ramps including hollow core, beams, and columns; 3,000 stair units of varying heights.