International Arrivals Facility Tops Out at Sea-Tac

In December of 2018, the main hall of the International Arrivals Facility (IAF) at Seattle-Tacoma International Airport (Sea-Tac) topped out. The event marks a significant milestone in the construction of the 450,000-square-foot project, which will eventually double the airport's capacity for international flights.

The new facility will hold baggage claim, customs and border protection areas, and a TSA checkpoint. It will also feature an 800-foot-long aerial walkway, which will bring passengers to the hall from the airport's South Satellite gates. To minimize impact to operations, the walkway is being constructed in three sections; the 300-foot-long center section will be fabricated offsite and lifted into place in the summer of 2019, marking the next major milestone.

The IAF is the most complex capital development project in Sea-Tac's history. Construction is scheduled to be complete by the summer of 2020, opening to the public in the fall.

SOM is the lead designer and architect of record for the design-build project. The team includes SOM; Clark Construction Group; The Miller Hull Partnership; Patano Studio Architecture; KPFF Consulting Engineers; Magnusson Klemencic Associates; Arup; and bridge design specialist consultants Schlaich Bergermann Partner.