b"18 BNA TERMINALSabout 6 feet higher than initially planned so it would clear-span thelarge multimedia displays, new central TSA checkpoint, existing building. This allowed workers to construct the new roofmarketplace and outside to the airfield. while the terminal below remained operational and allowed phasingThe design of the airwave roof included bind trusses and to continue to reduce passengers and operations in the new Grandcruciform columns to minimize the impact of the structure Lobby space. through the existing building and carry forward through the new Palmer says that twin curvilinear long-span trusses stretchingbuilding. In total, six columns were lifted over the top of the 660 feet between the adjacent garage and airfield create thebuilding and lowered down through five levels of the existing roofs distinct, elegant and undulating effect. This structuralterminal structure through major functional rooms. Hensel solution minimized the number of curved trusses, easedPhelps and Fentress eagerly embraced the idea [to reduce the fabrication costs and enhanced the roofs stability during steelstructural column impact], says Palmer. The design team closely erection, he explains. To avoid the need for temporary shoringcoordinated the functional programming requirements with the and bracing during steel construction over the operationalcolumn placement to be able to find the exact location for the terminal, engineers created 10-foot-deep spine trusses thatcolumns to be installed without impacting the buildings critical provided natural stability. Connecting straight trusses to the spinesystems. Benefits of the strategy included:trusses and cantilevering them outward achieved the curvilinearEnhanced visibility/views and natural light by eliminating shape, which resembles an airplane wing. dozens of interior columnsThe initial concept for the Grand Lobby included more than Uninterrupted airport operations80 structural columns to support the airwave roof. To achieve a Weather protection from the new roof while crews removedmore open design, Magnusson Klemencic Associates devisedthe existing roofa solution to support the roof and adjoining pedestrian bridge The existing roof served as a work platform to install ducts with only two columns visible along the front faade. This designand pipes before crews removed itprovides uninterrupted views of the suspended art installation, Airport Improvement Ad ('23) (groups).ai 4 4/6/2023 9:49:55 AMExperience ExceptionalCMYCM Program ManagementMYCY Our hands-on approach,CMYK carrying you forward everystep of the way.May | June 2023AirportImprovement.com"