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
| Jan 20, 2011
Worship center design offers warm and welcoming atmosphere
The Worship Place Studio of local firm Ziegler Cooper Architects designed a new 46,000-sf church complex for the Pare de Sufrir parish in Houston.
| Jan 20, 2011
Construction begins on second St. Louis community center
O’Fallon Park Recreation Complex in St. Louis, designed by local architecture/engineering firm KAI Design & Build, will feature an indoor aquatic park with interactive water play features, a lazy river, water slides, laps lanes, and an outdoor spray and multiuse pool.
| Jan 20, 2011
Community college to prepare next-gen Homeland Security personnel
The College of DuPage, Glen Ellyn, Ill., began work on the Homeland Security Education Center, which will prepare future emergency personnel to tackle terrorist attacks and disasters. The $25 million, 61,100-sf building’s centerpiece will be an immersive interior street lab for urban response simulations.
| Jan 19, 2011
Industrial history museum gets new home in steel plant
The National Museum of Industrial History recently renovated the exterior of a 1913 steel plant in Bethlehem, Pa., to house its new 40,000-sf exhibition space. The museum chose VOA Associates, which is headquartered in Chicago, to complete the design for the exhibit’s interior. The exhibit, which has views of five historic blast furnaces, will feature artifacts from the Smithsonian Institution to illustrate early industrial America.
| Jan 19, 2011
Baltimore mixed-use development combines working, living, and shopping
The Shoppes at McHenry Row, a $117 million mixed-use complex developed by 28 Walker Associates for downtown Baltimore, will include 65,000 sf of office space, 250 apartments, and two parking garages. The 48,000 sf of main street retail space currently is 65% occupied, with space for small shops and a restaurant remaining.
| Jan 19, 2011
Biomedical research center in Texas to foster scientific collaboration
The new Health and Biomedical Sciences Center at the University of Houston will facilitate interaction between scientists in a 167,000-sf, six-story research facility. The center will bring together researchers from many of the school’s departments to collaborate on interdisciplinary projects. The facility also will feature an ambulatory surgery center for the College of Optometry, the first of its kind for an optometry school. Boston-based firms Shepley Bulfinch and Bailey Architects designed the project.
| Jan 19, 2011
San Diego casino renovations upgrade gaming and entertainment
The Sycuan Casino in San Diego will get an update with a $27 million, 245,000-sf renovation. Hnedak Bobo Group, Memphis, Tenn., and Cleo Design, Las Vegas, drew design inspiration from the historic culture of the Sycuan tribe and the desert landscape, creating a more open space with better circulation. Renovation highlights include a new “waterless” water entry feature and new sports bar and grill, plus updates to gaming, poker, off-track-betting, retail, and bingo areas. The local office of San Francisco-based Swinerton Builders will provide construction services.
| Jan 19, 2011
Extended stay hotel aims to provide comfort of home
Housing development company Campus Apartments broke ground on a new extended stay hotel that will serve the medical and academic facilities in Philadelphia’s University City, including the University of Pennsylvania and the Children’s Hospital of Philadelphia. The 11,000-sf hotel will operate under Hilton’s Homewood Suites brand, with 136 suites with full kitchens and dining and work areas. A part of the city’s EnergyWorks loan program, the project aims for LEED with a green roof, low-flow fixtures, and onsite stormwater management. Local firms Alesker & Dundon Architects and GC L.F. Driscoll Co. complete the Building Team.
| Jan 19, 2011
New Fort Hood hospital will replace aging medical center
The Army Corps of Engineers selected London-based Balfour Beatty and St. Louis-based McCarthy to provide design-build services for the Fort Hood Replacement Hospital in Texas, a $503 million, 944,000-sf complex partially funded by the American Recovery and Reinvestment Act. The firm plans to use BIM for the project, which will include outpatient clinics, an ambulance garage, a central utility plant, and three parking structures. Texas firms HKS Architects and Wingler & Sharp will participate as design partners. The project seeks LEED Gold.
| Jan 19, 2011
Museum design integrates Greek history and architecture
Construction is under way in Chicago on the National Hellenic Museum, the nation’s first museum devoted to Greek history and culture. RTKL designed the 40,000-sf limestone and glass building to include such historic references as the covered walkway of classical architecture and the natural wood accents of Byzantine monasteries. The museum will include a research library and oral history center, plus a 3,600-sf rooftop terrace featuring three gardens. The project seeks LEED Silver.
