SeaTac North Main Terminal Redevelopment

This $400 million design-build addition includes substantial revisions to the Alaska Airlines’ customer experience, new structural steel-framed additions at the bridge level, and revisions to existing baggage handling systems, mezzanines, and associated work throughout the terminal.

The project faced challenges where existing drawings lacked clarity on conditions or constructability. To save the schedule, we conducted multiple site walks with the Builder, with preliminary details in hand to assess their application, allowing us to refine details, streamline construction, and cut costs. We continued this method throughout construction.

When faced with low overhead clearances, the need for mechanical routing, and a blind ceiling sub-structure beneath the existing departures roadway, we worked to develop a solution utilizing metal deck and threaded rods, which would allow the ceiling system to be constructed at bench-height, and raised into place by threading nuts on the threaded rod drops, and cutting off those drops once the system was at its final elevation.