Launch Slideshow

Terminus

Terminus

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    Located on a prominent corner in Atlanta, this tower is a monumental glass volume chiseled on the diagonal to create a bold V-shaped form that reveals the inner volume and a translucent, triangular crown.

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    Positioned between the tower and the parking garage, a large open canopy serves as both a covered entrance to the lobby and an exterior space for events.

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    The canopy consists of folded solid metal and fritted glass panels, uplit with 150W T6 3000K metal halide fixtures located along the sides. Based on a detailed reflection study, the lighting designers determined that point sources would minimize the visibility of the fixtures reflected on the glass ceiling panels.

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    100W PAR38 3000K metal halide surface-mounted downlights integrated into architectural slots in the V-shaped ceiling panels illuminates the floor.

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    The V-shaped ceiling panels carry into the lobby illuminating the interior surfaces.

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    The entrance, with its welcoming bright awning, enlivens the streetscape and guides visitors to the off-street entrance. Its triangular form alludes to the top of the building. At night, the architect's intention was for the building to read as a coherent form and not a disembodied illuminated crown.

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    The building is sliced off to reveal an inner tower that protrudes through the cut. To highlight this effect, the lighting designers only illuminated the surface of the slice itself-the large sloping plane that transition to lines of glass framing the inner core structure. Illumination of the top floor of the protruding tower core with 3000K fluorescents heightens the effect of the volume pushing through the slice. A warmer color consistency is maintained throughout.

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    At the narrow windows inside the offices that surround the protruding core, 3000K LED narrow beam wall grazers illuminate the translucent fritted glass from within.

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    Inside the top, a set of three, 400W metal halide fixtures with 3000K Chromafit lamps have varying beams (vertical flood, horizontal spot, and narrow spot) to evenly light the 110 foot sloped surfaces. The fixtures are positioned to carefully minimize shadowing from the structure. Fixtures mounted just 8 feet from the floor illuminate the vast expanse of the surfaces.

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    The simplicity of the nighttime effect belies the substantial technical hurdles encountered. By carefully coordinating different sources and wattages appropriate for each architectural space, the lighting design accommodates the change in scale and material from one glass surface to another. The successful rendering of the building top, along with themes first experienced at the base, creates a seamless final composition.

Terminus 100, a 27-story office tower, is distinguished on the Atlanta skyline by a bold, diagonally cut roofline broken by the building's core, which juts out to create a vivid V form. By day, the sculptural gesture is eye-catching in and of itself. At night, a scheme by Cline Bettridge Bernstein Lighting Design (CBBLD) transforms the roofline into an iconic lantern.

The most challenging aspect in creating this effect was to maintain an even degree of illumination between the V form, which covers tenant spaces, and the mechanical enclosure above it. In addition to the scale difference between the two elements, the glass surfaces also vary, complicating the execution of consistent color and brightness. CBBLD was able to achieve the effect through a careful coordination of varying sources and wattages appropriate for each space.

The mechanical penthouse is lit by three 400W metal halide fixtures with 3000K lamps mounted 8 feet from the floor. The designers used varying beams—including vertical flood, horizontal spot, and narrow spot—to evenly light the 110-foot slope. The fixtures were also carefully placed to avoid creating shadows from the steel structure. A very different solution was used to light the V form from inside the office spaces. There, 3000K narrow-beam LED wall-grazing fixtures illuminate the translucent fritted glass of the curtain wall. The top of the protruding core was also lit with 3000K linear fluorescent uplights, heightening the volume's effect of pushing through the roofline and creating a smooth transition between the V and the crown.

The V motif also appears in the entrance canopy between the tower and an adjacent parking garage. The canopy's triangular panels of metal and fritted glass are uplit with 3000K 150W T6 metal halide fixtures. CBBLD's studies determined that point sources would minimize the reflection of the fixtures on the glass. The floor is illuminated by surface-mounted 3000K 100W PAR38 downlights integrated into the canopy panels. The same fixtures light the lobby, creating a seamless transition between inside and outside.

Jury Comments
Mike Gehring: A lot of challenges here and a particularly nice solution to the outdoor covered entryway. You really get the sense that people want to gather here.
Jim Baney: The well-integrated lighting is the unifying element between the Terminus buildings. It helps to tie inside to outside and creates an “outdoor room” for people to gather.

Manufacturers / Applications
Bega: Surface-mounted 400W metal halide floodlight at top tower roof level
Elliptipar: Ceiling-mounted T5 linear 39W uplight at beak chamfer
Hydrel: Surface-mounted 100W and 400W metal halide floodlights at top tower penthouse and roof level
Insight: Surface-mounted 8-foot linear fluorescent uplight at top tower roof level
io Lighting/Cooper: Ceiling-mounted high output 3000K LED fixture at beak chamfer
LSI: PAR30 and PAR38 track fixture with integral ballast at café street canopy; PAR30, PAR38, and PAR56 track fixture for lobby art lighting