Four Seasons Tower, San FranciscoSan Francisco, California

  • A 40-story mixed-use structure located just off Union Square in the heart of San Francisco
  • Contains a five-star hotel with 277 guest rooms and 142 luxury condominiums
  • The podium level houses both retail and parking
  • The building is located along a major fault line in one of the highest category seismic zones in the United States
  • The innovative and irregular structure raised many engineering challenges
  • DeSimone performed a dynamic analysis on the structure as a whole, as well as its subsections
  • Non-linear viscous dampers are used to limit wind impact
  • A limit state design approach is utilized to resist seismic forces associated with a Maximum Credible Seismic Event
  • Awards:
    NASC – Gold Award 2002