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Public Safety Building, Salt Lake City

Salt Lake City's Public Safety Building featured Wausau Window and Wall Systems' unitized curtainwall, windows, light shelves and sunshades.

Salt Lake City's Public Safety Building featured Wausau Window and Wall Systems' unitized curtainwall, windows, light shelves and sunshades. The building's glass façade was a central element of GSBS Architects' design.

The northwest-facing public face of the building, which opened in July 2013, features a serpentine glass curtainwall that slopes from one wing to the other. The design called for the curtainwall to cant, or angle, in multiple directions. The glass exterior needed to meet seismic and ballistic requirements, and contribute to LEED Platinum certification criteria and net-zero energy design.

Okland Construction and LCG Façades involved Wausau in the project to address the complexities of the design and engineering requirements.

Ted Derby, business development manager at LCG Façades, says his company was brought in early in the design phase to answer one question: Can a curtainwall system segment and cant backward at 15 degrees, and change angle while maintaining the cant through a reverse S-curve? "We thought with Wausau's help, we could make it happen," he says.

LCG Façades and Wausau agreed to work on the project together, Derby says, and Wausau's engineers visited Utah to view the construction site, meet GSBS Architects representatives and ensure the curtainwall and window system designs were in sync with the firm's vision.

Gene Pagel, vice president of engineering at Wausau, says every piece, dimension and angle of the 135 curtainwall units located at the center of building was different. Components of each trapezoidal unit required design engineering, 3-D layout, precise machining, fabrication, glazing and shipping provisions, he says. "The care and precision needed to make this complex design a reality was incredible," Pagel notes.

The $125 million, 335,000-square-foot facility houses Salt Lake City's police and fire departments, and functions as the primary disaster and emergency operations center for the area. The public safety building includes 172,000 square feet of space on four levels above ground, 143,000 square feet of secure parking below grade. Work on the project began in June 2011.

LCG Façades installed more than 32,000 square feet of Wausau's INvision Thermal Unitized Curtainwall, including 19,150 square feet of 7250i- UW Series and more than 13,000 square feet of 6250i-HRX Series, in the building's lobby and on the main floors. The unitized systems' interlocking frame design accommodated seismic, live load and thermal building movements.

LCG Façades installed approximately two dozen Wausau 4250-Z Zero Sightline casement windows on the building's upper floors to support the project's goals for natural ventilation and to create a connection to the outdoors for occupants. Wausau engineered and installed Clear Story interior light shelves and sunshades to allow light to penetrate deeper into the interior spaces. Linetec finished the aluminum components in MC Platinum using a two-coat, 70-percent fluoropolymer mica flake paint.

Viracon Inc. fabricated the high-efficiency, triple-insulating glass used in the curtainwall and the low-E, insulated glass installed in the casement windows. In some curtainwall units, three different thicknesses of glass were needed to provide the security required for the project.

Derby says his company chose to work with Wausau due to the company's reputation, which it lived up to on this project. "All materials were delivered on time and in first-rate condition," he says. "In short, Wausau made us look good!"

Owner: Salt Lake City

General contractor: Okland Construction, Salt Lake City

Architect: GSBS Architects, Salt Lake City

Glazing contractor: LCG Façades, Salt Lake City

Finisher: Linetec, Wausau, Wis.

Curtainwall/windows: Wausau Window and Wall Systems, Wausau,

Glass: Viracon Inc., Owatonna, Minn.,