No Boundaries

USGlass Magazine’s 2018 Green Design Awards Winners

Innovation—in both design and performance—were stand-out features of the winners of USGlass magazine’s 2018 green design awards, with nominated projects covering the architectural gamut, from highrise to lowrises, new construction and renovation.

The criteria were simple: Show us projects that feature glass and glazing as a key element of the building’s energy-efficient design. Submissions this year did not disappoint. One no-table detail judges pointed out is the overall increasing size of high-performance buildings.

“As size gets bigger, so does the complexity of green building design,” said Richard Green of Front Inc., one of the judges this year. “It is important for us to do green design on projects of scale and not just on small boutique projects.”

To determine the winners in this year’s competition, judges considered the following points:

Energy: Does the building improve efficiency and reduce consumption?

Materials: Does the building use sustainable materials and eliminate waste?

Assurance: Does the project’s design comply with environmental regulations (such as LEED.)?

Innovation: Did the project incorporate unique/innovative design practices, products, etc. through its glazing/façade?

While the competition this year was close, two projects stood out. One is a highrise that features a unique glazing façade, while the second features solar panels and daylight harvesting systems.

The Judges

USGlass would like to extend a special thank you to this year’s judges who assisted in the selection of this year’s winners.

Richard Green, PE and principal, Front Inc. in Seattle

Vicente Montes, P.E., LEED BD+C, MSc. façade engineering associate, Curtain Wall Design & Consulting, Leesburg, Va.

Douglas Noble, architect, associate professor, University of Southern California, Los Angeles

181 Fremont, San Francisco, California

Date of completion: May 2018

Architect: Heller Manus Architects

Contract glazier: Benson Industries

Exterior glass fabricator(s) and supplier(s): Hartung Glass, fabricator; Vitro Architectural Glass, glass manufacturer

Amount of glass used: 240,000 square feet

Green Building Certifications: Pre-certified LEED Platinum; all finishes and material throughout the building were evaluated to meet—and often exceed—CALGreen requirements.

Standing 800 feet, 181 Fremont in San Francisco is a mixed-use tower that features a number of innovative design elements. These include a highly-glazed unitized curtainwall system constructed with Solarban 70XL glass supplied by Vitro Architectural Glass and fabricated by Hartung. The glass blocks more than 70 percent of the sun’s heat energy while transmitting nearly 65 percent of its ambient light, helping to reduce the need for artificial cooling and lighting.

The exterior façade is designed as a high-performing, fully glazed system that extends from floor to ceiling level on each floor featuring a saw-tooth pattern to achieve the energy performance targets while maximizing daylight. The saw-tooth glass structure serves as a passive solar design feature; angling the mullions slightly in against one another affords an additional amount of shade throughout the day as the sun passes over the glass.

Green noted that the “innovative facade geometry adds surface area to the facade, but does so in a way that adds to the efficiency and enjoyment of the space and creates a distinctive aesthetic. This means of tuning the building demonstrates that we do not need to be constrained to the plot orientation to optimize the facade for daylight and efficiency.”

According to information supplied by Vitro, the unique glass curtainwall system maximizes natural light, improves the quality of light and reduces power consumption.

In addition to the high-performance glazing, the tower features a number of other energy-efficient details. For example, 4.98 percent of the existing low-level structures on the project site that were demolished were recycled. Sustainable and recycled products were used extensively in the construction, and many of the materials are of recycled content and were regionally sourced or manufactured within 500 miles of the project.

804 Carnegie Center West, Princeton, N.J.

Date of completion: Opened in August 2016; awarded LEED Plantinum of Certification in April 2017

Architect: Jacobs Engineering Group

Contract glazier: Josloff Industries

Green building Certificates: LEED Platinum Certification

Amount of glass used: More than 46,000 square feet

Glass fabricator(s) and supplier(s): J.E. Berkowitz (JEB), glass fabricator; Guardian Glass, manufacturer

In designing 804 Carnegie Center West, Jacobs Engineering Group wanted to set a new architectural direction for future developments on the sprawling campus. John Jackson, senior associate at Jacobs, said his team’s intention was to create an ultra-green facility by pairing high-performance materials, such as glass, with cutting-edge technology.

One of the primary design features of the project is a two-story space that was developed as an enhancement to the building’s core. Using a two-way, butt-glazed system, the area is expressed as a glass box that is visible from the highway. The glassy façade is intended to identify both the tenant and the activity going on within the building. With a large expanse of glazing facing almost due south, high-performance glass was required to insulate and limit solar heat gain, while not being overly tinted or reflective. In addition to the strict performance specification, the glass had to be sufficiently flat and free of distortion in order to achieve the de-sired aesthetic.

JEB fabricated Winduo insulating glass units (IGUs) in multiple configurations, featuring Guardian Glass’ high-performance, low-E SunGuard AG 50 coated glass for the building, and low-E Sun-Guard Neutral 78/65 coated glass for the entrances. In addition, JEB provided nearly 9,000 square feet of Invisiwall glass systems for the building’s interior, including precision-fabricated laminated clear glass partitions and doors.

JEB director of engineered glass systems Mike Nicklas said, “The edge alignment of the interior laminated glass was critical since the monolithic glass partitions were connected with polycarbonate I-bar strips to provide a nearly seamless joint, enhancing the overall look.”

According to information from the company, the high-performance Win-duo IGUs with low-E SunGuard AG 50 coated glass offer a solar heat gain coefficient of 0.34, a winter U-Value of 0.3, and visible light transmittance of 50 percent. The IGUs also incorporated the company’s 3Seal warm-edge spacer system, minimizing the units’ primary seal migration to provide straight sightlines, as well as maximizing their structural stability and thermal efficiency. The JEB 3Seal insulating glass spacer is a high-modulus silicone secondary seal offering 35 percent higher design strength compared to other products. This allows for a narrower air cavity in an IGU, and 10.4 percent more argon gas retention than standard sealants, based on ASTM 2190 testing. According to company information, an IGU incorporating the JEB 3Seal HM+ spacer will retain its argon gas longer over other insulating glass systems, maximizing energy savings and extending the unit’s service life.

The building also features 10,000 square feet of solar panels, rainwater and daylight harvesting systems, a green roof, two wind turbines, and more than 30 electric vehicle charging stations.

To view the laid-in version of this article in our digital edition, CLICK HERE.

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