Utah State Capitol Seismic Base Isolation & Historic Renovation

Utah State Capitol Seismic Base Isolation & Historic Renovation

Salt Lake City, Utah
VCBO Architecture

2008 ACEC National Honor Award Engineering Excellence

2010 ASCE National Outstanding Civil Top 5 Finalist

2009 EERI National Special Recognition Award Earthquake Engineering

2008 McGraw-Hill Utah Best Projects Best of the Best

2009 NCSEA National Outstanding Project Award Finalist

2008 Post-Tensioning National Award of Excellence Repair, Rehabilitation & Strengthening

2008 Western States National Honor Award Excellence Mitigation

In the News

The North Capitol Building on Utah's Capitol Hill is a modern marvel built upon over a century of visionary planning. Originally constructed in the early 1900s using reinforced concrete, it was later determined that the building's seismic performance could be improved. A plan was devised to install 265 base isolators, necessitating the removal of the existing foundation. Through a collaborative effort with the construction manager, an innovative method of load transfer was implemented, saving time and money.Each of the 265 isolators is capable of a horizontal displacement of 24 inches, allowing for a total swing of 48 inches. The project also involved reinforcing existing columns, walls, and the dome for earthquake protection. Updates were made to the electrical, air conditioning, heating, and lighting systems. The building's original artifacts and architectural features, including paintings, murals, statues, and the marble staircase, were meticulously restored and repaired.The project received national recognition, including being named a Top 5 Finalist for the 2010 Outstanding Civil Engineering Achievement Award by the American Society of Civil Engineers and a 2009 Outstanding Project Award Finalist by the National Council of Structural Engineering Association.The North Capitol Building is part of a larger vision for Capitol Hill, which includes the Historic Utah State Capitol Building and the East and West Annex Buildings, all designed in the neoclassical style. These structures, along with the new North Capitol Building, support Utah State Government functions and contribute to the rich history and architectural heritage of the region.

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