How is the airport in Seattle Washington

Seattle-Tacoma International Airport footbridge

A new pedestrian bridge was built as an important part of the modernization of Seattle-Tacoma Airport. It connects the international arrival area with the main building and spans the existing runway with a clearance of 26 meters.
The decisive elements for the design of the bridge were the tight schedule and the maintenance of flight operations. Due to the permanent use, the client could only close the affected taxiway once for a maximum of seven days. Therefore, the main span was prefabricated with a span of 83 m and lifted during the closure.
The side panels act as cantilever arms, which consist of back-anchored, V-shaped supports and support the main panel moment-free after it has been lifted into place. The elevators and escalators for vertical access are located in the side panels.
The deck consists of a steel composite construction with cross members spaced 3 m apart, the cross-section in the middle of the bridge being 12 m wide and tapering to 6 m towards the ends. In order to minimize vibrations in sideways wind, vibration dampers are provided in the middle of the bridge.


  • place

    Seattle, Washington, USA

  • architect

    Skidmore, Owings & Merrill (San Francisco)

  • collaboration

    Wacker Engineers, KPFF Engineering, Skidmore, Owings & Merrill Engineers

  • Builder

    Port of Seattle

  • Construction company

    Clark Construction

  • Our performance

    Basic investigation, draft, implementation planning