Hangar One

Hangar One is a recognizable Bay Area landmark and one of the largest
freestanding metal structures in the world. The project rehabilitated the
existing structure to create a higher performing building with flexibility for a
range of modern uses while allowing it to recapture and continue its historic
legacy.
The iconic structure is listed in the National Register of Historic Places and
was constructed in the 1930’s to house a dirigible for the U.S. Navy. The
current project started with the existing metal frame as the skin was
previously removed as part of a hazardous materials mitigation program.
The project team went to exceptional lengths to rehabilitate Hangar One in
a way that respected the visual characteristics of the original building while
simultaneously improving past deficiencies.
A new, modern façade and roof were designed to improve thermal
performance and interior comfort, while maintaining similar apertures and
weight as the historical ones. Structural upgrades were carefully designed
to minimize their visual impact, while the concrete floor slab, concrete stem
wall, and rolling “clamshell” doors at each end were retained and repaired.
A performance-based passive ventilation strategy was implemented which
significantly contributed to an energy and material-efficient design. A
historical vent at the roof ridge was reimagined to be operable to adjust air
flow and fresh air intake louvers were added at the structure base to take
advantage of a natural heat stack effect.
The result is a renewed modern landmark that restores its significance to
the local community.