Seattle-Tacoma International Airport Concourse D Annex
Seattle-Tacoma International Airport Concourse D Annex
Hok
FIRM
Hok
INTERIOR DESIGNER HOK
Lauren Lair, Tambra Thorson
PROJECT ARCHITECT HOK
Kenneth Miller, Levi Rippy
DESIGN PRINCIPAL HOK
Alan Bright
PROJECT ARCHITECT HOK
Kenneth Miller, Levi Rippy
AVIATION PLANNER HOK
Matthew Needham
ARCHITECTURAL QUALITY CONTROL MANAGER HOK
Kyle Prenzlow
SUSTAINABLE DESIGN LEADER HOK
Sean Quinn
PRINCIPAL-IN-CHARGE HOK
Robert Chicas
CAPITAL PROJECT MANAGER Port of Seattle
Patty Bergstedt
RESIDENT ENGINEER Port of Seattle
Robert Dahl, CK Humphreys
CONSTRUCTION MANAGER Port of Seattle
Tyler Symbol
DIRECTOR OF CONSTRUCTION MANAGEMENT Port of Seattle
Janice Zahn
SENIOR PROJECT MANAGER Walsh
Julio Iguina
ASSISTANT PROJECT MANAGER Walsh
Richard Wright
SUPERINTENDENT Walsh
Dan Prychitko
CONSTRUCTION QUALITY CONTROL MANAGER Walsh
Nate Workman
DESIGN MANAGER Walsh
Dan Gallagher
SMALL BUSINESS OUTREACH MANAGER Walsh
Angelo Trapani
PROJECT EXECUTIVE Walsh
Doug Benjamin
SAFETY MANAGER Walsh
Jim Maloney
BIM MANAGER Walsh
Gayane Aghazarian
ELECTRICAL ENGINEER CASNE
Curtis Clute
ACOUSTICAL ENGINEER SSA ACOUSTICS
William Stewart
STRUCTURAL DESIGN Lund Opsahl
Peter Opsahl
CIVIL ENGINEER Osborn Consulting, Inc.
Robert Parsih
MECHANICAL/FIRE PROTECTION Notkin
Larry Swartz
PROJECT MANAGER HOK
Todd Buchannan
STATUS
Built
YEAR
2018
LOCATION
Seattle, WA, United States
CATEGORY
Transport + Infrastructure › Airport
Inspired by the natural splendor of the Pacific Northwest, the Seattle-Tacoma International Airport Concourse D Annex is a sleek, day-lit, open pavilion whose elegant form evokes the joy of flight.
The Annex addresses the Airport’s peak gate and passenger demand, enabling buses to shuttle passengers to-and-from their planes.
The design elevates what might typically be a prosaic building into an unrestrained space that conveys the dynamism of air travel and enhances passenger experience.
The Annex’s elongated form and rotating pitched roof respond to the building’s function, mirroring passenger flow to-and-from the main terminal.
The ceiling height adjusts to where it is most necessary, reducing the amount of materials used while creating a visually dynamic experience.
The column-free, open-plan interior is organized with six gates and passenger lounges on parallel sides of the building.
The interior bridge, sloped walkway, and circulation were sized to accommodate two-way passenger flow, incorporating intuitive wayfinding to reduce passenger anxiety and the need for crowd control.
Maximizing flexibility, an additional gate and passenger lounge can be activated by replacing the walkway with escalators, while a mother’s room and children’s play area ensure that families are well-accommodated.
As the first LEED v4 Silver-certified airport passenger building in North America, the Annex minimizes energy-use by balancing building architecture, mechanical systems, and lighting design to function optimally in Seattle’s climate.
The high-reflectance roof helps reduce the building’s heat island effect, while the high-performing curtain wall façade maximizes natural light and connects travelers to the outdoors.
Incorporating biophilic design strategies, the interior features a glue-laminated timber-and-steel truss system constructed from locally sourced Douglas fir trees, which provide the highest thermal performance and reduces the structure’s embodied carbon.
Moreover, the walkway hovers above a vegetated rock garden that assists passengers with wayfinding and adds to the calming of the daylit concourse.
