Completed in 1932, the Potter County Courthouse is recognized as one of the most significant high-rise Art Deco courthouses in Texas, and among the most prominent in the country. Local architect W.C. Townes, of Townes, Lightfoot and Funk, designed the eight-story structure with a terra cotta fac?ade adorned in decorative figural and botanical bas-relief depicting the region’s cultural and natural history.
After more than 80 years of use, the courthouse was long overdue for an interior modernization and exterior restoration. The $15.5 million effort was undertaken as part of the Texas Historic Courthouse Preservation Program, a state-funded program that covered about one-third of the project’s cost. It included a complete fac?ade restoration—including repairing and re-anchoring damaged units and replacing mortar joints—and an overhaul of the interior spaces to meet current building and accessibility codes and the operational and functional needs of the county’s administrative offices and courts.
The original mechanical systems were replaced with a four-pipe scheme utilizing a 200-ton chiller and 250-ton cooling tower. An additional 60-ton, air-cooled chiller was placed on the roof, and 12 air-handling units were located on the various roofs at the fifth, sixth, and eighth floors. The new system, combined with automatic controls and enhanced thermal roof insulation, is expected to reduce energy costs by 20% annually.
POTTER COUNTY COURTHOUSE
Amarillo, TexasBuilding TeamSubmitting firm: JQ (structural engineer)Owner: Potter CountyArchitect: ArchiTexasMEP engineer: Johnson Consulting EngineersConstruction manager: Southwest General ContractorsGeneral contractor: Journeyman ConstructionGeneral InformationSize: 62,390 sfConstruction cost: $15.5 millionConstruction time: November 2009 to August 2012Delivery method: Design-bid-build
The Reconstruction Awards judges hailed the Building Team for its painstaking efforts in preserving the historical elements of the building while modernizing the structure. To accommodate the new mechanical systems and other modern amenities, such as fire/life safety systems, information technology infrastructure, and high-density shelving units, the team devised several creative structural solutions:
• Tunnel expansion. To preserve the courthouse’s original, first-floor terrazzo floors, the team utilized the facility’s underfloor utility tunnels to run new insulated piping. Deemed inadequate to handle the new systems, the existing tunnels had to be carefully reinforced and expanded. In total, more than 200 feet of concrete- and masonry-lined tunnel was added on to the existing layout, allowing for the terrazzo flooring to remain intact.
• Clay tile floor removal. The added weight of the rooftop mechanical units and high-density shelving meant that certain areas of the existing structure on floors two through six would need to be reinforced. However, because the plaster ceiling finish was applied directly to the original clay tile and reinforced concrete joist floor system, structural members could not be inserted below the original ceiling level.
The solution involved removing portions of the original clay tile forms to allow the installation of new steel beams constructed from steel T-sections between the existing concrete joists, thereby increasing the floor load capacity. The use of T-sections in lieu of standard wide-flange sections facilitated access for completion of field connections to the existing structure and the placement of non-shrink grout between the top of the steel members and the underside of the original floor slab to provide full load transfer.
• Use of CFRP strips. In order to accommodate new stairs, vertical chases, and mechanical infrastructure, numerous openings of various sizes had to be cut into the slab on floors seven and eight. The original floor structure on these levels is eight-inch reinforced concrete slabs spanning the concrete beams.
To maintain the structural integrity and continuity of the floor slabs, strips of laminated, 1?4-inch-thick carbon fiber reinforcement polymer (CFRP) were used to redistribute the loads adjacent to and around the openings. Larger openings for the stairs and chases called for additional reinforcement, and CFRP strips were placed on top or below the slab, corresponding to the tension zone of the slab system.
In several locations, strips were placed in both directions around the openings to properly distribute the load.
“We liked how the team carefully pre- served the clay-tile floor and the reinforced concrete slab with the strengthening schemes hidden out of sight,” said judge K. Nam Shiu, Senior VP, Director of Restoration Services, Walker Restoration Consultants (www.walkerrestoration.com). “They successfully provided up-to-date floor functionality while keeping the layout and look of the original building.”
The Building Team took careful measures to avoid disturbing the historical elements in the building. This included expanding an existing utility tunnel (above) and applying special structural reinforcement polymer to select concrete frame members (top). Photo: Brenda Bagot
Related Stories
Sports and Recreational Facilities | May 26, 2022
WNBA practice facility will offer training opportunities for female athletes and youth
The Seattle Storm’s Center for Basketball Performance will feature amenities for community youth, including basketball courts, a nutrition center, and strength and conditioning training spaces.
Multifamily Housing | May 25, 2022
9 noteworthy multifamily developments to debut in 2022
A 1980s-era shopping mall turned mixed-use housing and a mid-rise multifamily tower with unusual rowhomes highlight the innovative multifamily developments to debut recently.
Coronavirus | May 20, 2022
Center for Green Schools says U.S. schools need more support to fight COVID-19
The Center for Green Schools at the U.S. Green Building Council released a new report detailing how school districts around the country have managed air quality within their buildings during the second year of the COVID-19 pandemic.
Regulations | May 20, 2022
Biden’s Clean Air in Buildings Challenge aims to reduce COVID-19 spread
The Biden Administration recently launched the Clean Air in Buildings Challenge that calls on all building owners and operators, schools, colleges and universities, and organizations to adopt strategies to improve indoor air quality in their buildings and reduce the spread of COVID-19.
Building Team | May 20, 2022
Caltech breaks ground on a new center to study climate and sustainability
The California Institute of Technology (Caltech) recently broke ground on its Resnick Sustainability Resource Center.
Laboratories | May 20, 2022
Brutalist former Berkeley Art Museum transformed into modern life science lab
After extensive renovation and an addition, the former Berkeley Art Museum and Pacific Film Archive at the University of California, Berkeley campus reopened in May 2022 as a modern life science lab building.
Sports and Recreational Facilities | May 19, 2022
Northern Arizona University opens a new training center for its student athletes
In Flagstaff, Ariz. Northern Arizona University (NAU) has opened its new Student-Athlete High Performance Center.
Energy-Efficient Design | May 19, 2022
Shipping containers used to build Research Triangle Park’s first community gathering space
Shipping containers were the prominent building material used to construct Boxyard RTP, the first public community and gathering place in North Carolina’s Research Triangle Park (RTP).
Mixed-Use | May 19, 2022
Seattle-area project will turn mall into residential neighborhood
A recently unveiled plan will transform a 463,000 sf mall into a mixed-use destination site in the Seattle suburb of Bellevue, Wash.
Architects | May 19, 2022
The art and trade of architectural photography, with Brad Feinknopf
Longtime architectural photographer Brad Feinknopf discusses his craft and helping AEC firms realize their visions photographically. Feinknopf also touches on the evolution of photo shoots and the role of technology in architectural photography.
