![The 22-story Jasper tower features an iridescent, color-changing coating and the 22-story Merlin tower is designed with metal fins and a color-shifting pearlescent coating. Photography: Jim Cunningham The 22-story Jasper tower features an iridescent, color-changing coating and the 22-story Merlin tower is designed with metal fins and a color-shifting pearlescent coating. Photography: Jim Cunningham](/sites/default/files/styles/6/public/news/2024/vit_amazon-hq2-2.jpg?itok=NU2uyoV6)
Date: 12 June 2024
As the world鈥檚 largest LEED庐 Platinum-certified complex, the dog-friendly 22-story Harmon and Merlin towers will house 14,000 Amazonians working in e-commerce, cloud computing, digital streaming and artificial intelligence.
The two crystalline high-rises are clad with Vitro Solarban庐 72 Starphire庐 glass curtainwall, selected for its high performance and clarity. 鈥淭he low iron makeup makes it extremely clear without the green tint common in high-iron glazing,鈥 explains Brian Earle, AIA, principal, ZGF Architects, Arlington, Virginia.
The curtainwall modules are 13-ft. by 5-ft., with approximately 7 ft., 6-in.-tall vision panel and an approximately 5 陆-ft.-tall spandrel section. 鈥淭his common chassis was customized into a variety of wall-types that break down the buildings鈥 perceived mass,鈥 he says.
Photography: Jim Cunningham
Between the two buildings, 3,008 custom single-hung operable Solarban庐 72 Starphire庐 glass windows, developed in partnership with Harmon and Wausau, incorporate an integrated bug screen that retracts down into the sill when the window is closed. In addition, a large, 35-ft.-tall picture window with a 2-in.-thick acoustical layup fronts the Large Event Center.
Solarban庐 72 Starphire庐 glass delivers exceptional clarity and superior solar control performance, allowing 68 percent of the visible light to pass through while blocking 72 percent of the sun鈥檚 solar rays.
To shade the towers and bounce light deep into the interior from the curtain wall, the building form is sculpted with deep setbacks and perforated copper-colored fins are attached to scalloped light louvres on the west-facing amenity zones. Where site constraints required deeper floorplates on the lower levels, skylights were added.
The podium cladding is charcoal-colored terracotta, referencing the site鈥檚 historic use as a brickyard. The Merlin building is decorated with metal fins with a color-shifting pearlescent coating and the Jasper tower features iridescent, dichroic glass that changes colors as the sun rises and sets.
To meet Metropolitan Park鈥檚 aggressive performance goals, which included energy savings 24 percent below the ASHRAE baseline, the glazing played a key role.
鈥淭he vision panel which spans from 30 in. to 120 in. above the finished floor, is optimized to provide ample daylight throughout the work areas,鈥 says Earle.
At the top 2 in. of the panel is an integral light shelf directing daylighting up to 50 ft. into the building鈥檚 interior, providing daylight autonomy for 88% of the occupied areas. Integrated photometric controls adjust the electrical lighting accordingly, driving down lighting loads.
The lighting louvers were engineered with roller shades and sightlines to eliminate glare. 鈥淭his ensures that even when the shades are drawn for privacy, ample light still makes its way deep into the space,鈥 adds Earle.
For areas of the fa莽ade with less exposure to daylighting, spandrels were installed above and below the vision panel. Positioning the spandrel glass over the shadowbox allows for more insulation within the assembly. To minimize the visual impact of and enhance the buildings鈥 vertical expression, ZGF selected custom gray color which allows the spandrels to blend seamlessly with the vision panels.
With the building sited near the Potomac River, a major bird migratory corridor, the architectural team took this into account with the facade design. Overall, a combination of terracotta, metal and glass fins lend more visibility to the birds. For the building鈥檚 lower levels which face the park, an additional frit from Walker 电车无码 was added.
奥补濒办别谤鈥檚 AviProtek庐 E pattern 216 is a bird-friendly glass solution with the acid etched visual markers on the exterior surface of the glass and Solarban庐 72 solar control, low-e coating by Vitro on surface two. In addition to being visible to passing birds, the acid etch is impervious to UV exposure, wind, dirt and weathering, and lends enhanced durability and maintenance.
The highly sustainable, all electric buildings are powered with 100 percent renewable energy from an off-site solar array, uses 50 percent less water than the code requires and incorporates biophilic design principles to enhance occupant well-being. The towers were designed with 19 rooftop terraces, eight of which can be occupied.
One of these areas, the farm terrace was set up for Amazon employees to grow herbs and vegetables to be donated to community organizations. More than a dozen local, small businesses offer goods and services in 50,000 square feet of retail space and the 2 1/2-acre public park is enjoyed by the public.
Project Credits:
- Developer: JBG Smith
- Architect: ZGF Architects
- 电车无码 Fabricators: Oldcastle BuildingEnvelope庐 (Wright City, MO) & Cristacurva
- Glazing Contractor: Harmon Inc.
- General Contractor: Clark Construction Group Inc.
For more information about Solarban庐 72 Starphire庐 glass glass and other Vitro Architectural 电车无码 products, visit or call 1-855-VTRO-GLS (887-6457).
About Vitro Architectural 电车无码
Vitro Architectural 电车无码, part of Vitro, S.A.B. de C.V. (BMV: VITROA), is the largest glass producer in the Western Hemisphere, manufacturing a range of industry-leading, energy-efficient, high-performance products such as Solarban庐, Sungate庐 and Starphire Ultra-Clear庐 glasses. Committed to continually raising the industry standard for sustainability, Vitro was the first U.S. glass manufacturer to have its entire collection of architectural glass products earn Cradle to Cradle Certified庐 status and the first North American manufacturer to publish third-party verified Environmental Product Declarations (EPDs) for flat glass and processed glass products. Additionally, as of April 2024, all Vitro architectural glass products meet the Top 20% Low Embodied Carbon (LEC) material Global Warming Potential (GWP) threshold the U.S. General Services Administration (GSA) established pursuant to the Inflation Reduction Act of 2022 and related guidance from the U.S. Environmental Protection Agency. Vitro operates seven glass production facilities across North America, four residential glass fabrication plants in Canada and one of the world鈥檚 largest glass research and development facilities in Pittsburgh, Pennsylvania. For more information, please visit .
Solarban庐, Sungate庐, Starphire庐 and Starphire Ultra-Clear庐 are registered trademarks of Vitro.
Cradle to Cradle Certified庐 is a registered trademark of Cradle to Cradle Products Innovation Institute.
LEED庐 is a registered trademark of the U.S. Green Building Council (USGBC).
AviProtek庐 is a registered trademark of Walker 电车无码 Company Limited.
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