90 West Street – WTC Area

Following the events of September 11, 2001, Joseph B. Callaghan, Inc. was retained to investigate the facade of 90 West Street, an office building in close proximity to the World Trade Center Towers. This treasured building, designed by architect Cass Gilbert in 1907, suffered tremendous localized fire and impact damage, yet remained structurally sound.

The basic framing system consists of structural steel beams supporting short span concrete arches formed with left in place terra cotta arches. The steel columns were also protected with terra cotta, brick, or granite, thus providing the stability against fire and falling debris.