Cathedral of Our Lady of The Angels

Cathedral of Our Lady of The Angels

Designed for a service life of 500 years, the Cathedral of Our Lady of the Angels is a 5.5-acre structural concrete mecca in the heart of Los Angeles. The church seats 3,000 and can accommodate 5,000 in its plaza. Designed by Pritzker Prize winning architect Rafael Moneo, the Cathedral includes 149 seismic base isolators, 47 sliders, 645,000 square feet of architectural walls and 26,000 cubic yards of architectural concrete.


Nineteen full-size mock-ups were created during construction. After mockup surfaces revealed high incidences of thermal cracking, Morley developed several unique concrete mixes, material storage methods, placement procedures and stringent formwork removal criteria to mitigate various site conditions. Ready-mix trucks water cooled prior to loading and aggregates cooled using chilled water misters were used to control temperatures. Formwork was left in place a minimum of two and a half days after placing concrete, longer dependent on temperature differentials.

Project Details:

  • 475,000 gsf
  • 59,000 cy of concrete


Roman Catholic Archdiocese of Los Angeles


Leo A. Daly


  • 2006 ATC Engineering News Record - Top Seismic Resistant Projects
  • 2003 Concrete Industry Board - Roger H. Corbetta Award of Merit
  • 2003 Building Design & Construction - Building Team Grand Prize, Institutional
  • 2003 ASCE National - Outstanding Achievement in Civil Engineering Award
  • 2003 ASCE Metropolitan Los Angeles Chapter - Outstanding Private Sector Civil Engineering Project
  • 2003 American Concrete Institute International - Charles S. Whitney Award
  • 2002 Southern California Ready Mix Association - Excellence in Concrete
  • 2002 California Construction Link - Best of 2002, Religious
  • 2002 ACI Pankow & Concrete Awards (Southern California Chapter) - Charles Pankow Jr. Award, Excellence in Concrete
  • 2000 AIA Los Angeles - Building Team of the Year & Outstanding Achievement Presidential Award

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