The Aerial Guideway for the Dulles Corridor Metrorail passes through the airport and over wetlands to a maintenance yard.
would measure up to the nationally ranked universities and medical cen- ters in the surrounding neighborhood, while achieving pedestrian scale to invigorate a walkable community. Challenges included a project site flanked on three sides by heavily trafficked streets and an aggressive construction schedule. The architect’s design consisted of two stacked box forms, with the upper projecting out beyond the lower. Panels, precast by Enterprise Precast Concrete, Omaha, Neb., are integrally colored to avoid long-term repainting costs, and double sealant joints and polyurethane foam insulation create an energy-efficient envelope. The winner in the Office Building category was the Honor Credit Union Operations Office, Berrien Springs, Mich. With a September 2014 ground breaking, the three-story, 37,000-square-foot operations center faced a 12-month completion schedule. The entire cladding used only two precast concrete panels, allowing Kerkstra Precast, Grand- ville, Mich., to begin production as early as possible. The final exterior design alternates between full-floor solid and glass; 80 percent of the precast panels were identical in size. Precast concrete was also used on the interior flooring, where approximately 44,000 square feet of 8-inch slab and 118 brick-clad precast concrete panels were installed. Struc- tural engineer of record was Louis Shell Structures Inc., LaGrange, Ill. The Alpharetta City Center Parking Deck, Alpharetta, Ga. took top place in the Parking Structures category. The 40,500-square-foot, five- level parking deck is a supporting component of the master-planned Civic and Government Center and accommodates 455 cars. Precast concrete ensured the structure was aesthetically compatible with the traditional Georgian architecture of the adjacent city hall building while accommodating the schedule, budget, and structural needs of the deck, said George Spence, business development manager for Metro- mont Corp. in Dalton, Ga. Designers worked with the precasters to
develop a panelization system featuring a joint pattern that eliminated individual spandrel panels supported on columns, which reduced the number of façade pieces by 30 percent. A tall “tree” column design with branches extending to each side features architectural details and is able to receive double-tee loads on the back side. Engineer of record was Uzun + Case Engineers, Atlanta. In the Religious category, judges selected the Church of Jesus Christ of Latter-Day Saints Temple, Gilbert, Ariz., as the winning building project. The design of the church features nearly 1,000 precast concrete panels made with 73 forms. Sizes range from a single square foot to 262 square feet, with the heaviest piece weighing more than 25,000 pounds. The Architekton team (architect) used 3D modeling to design intricate patterns into each panel. Gate Precast, Hillsboro, Texas (pre- caster) used the 3D drawings to cast full-scale master molds and cus- tom formliners. Engineer of record was Paragon Structural, Phoenix. In the Stadiums and Arenas category, the winner was the Common- wealth Stadium Renovation/Expansion in Lexington, Ky. The façade for the University of Kentucky’s Kroger Field was cast by Gate Precast Company, Winchester, Ky., in 87, 8-inch-thick architectural precast concrete panels, reducing the number of pieces and bearing points, which lowered the overall cost of the project. Larger panels were divided into smaller sections with reveals and two finishes: a heavy and light sandblast in a random pattern to emphasize the smaller panel design. Engineer of record was Brown and Kubican, Lexington, Ky. The Custom Solutions category had two co-winners: Corning Mu- seum of Glass Contemporary Art + Design Wing, Corning, N.Y.; and Cleveland Public Square in Cleveland. The Corning Museum added a 100,000-square-foot addition, including 26,000 square feet of gal-
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csengineermag.com
april 2018
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