Whether sustainability or structural concerns are the challenges, the newest wave of performance glass tackles any issue. Halio Smart-Tinting Glass Kinestral Kinestral’s Halio electrochromic glass offers 50 shades of varying privacy and light blocking—transforming from clear to dark in three minutes. Available for interior and exterior applications, the smart system can be programmed to tint on a schedule or react to the weather. It can also controlled by voice, wall panel, or mobile device. Lightwall 3440 Extech The interlocking translucent structural cellular polycarbonate wall system from Extech is now available in three glazing options: a UV matte anti-reflective, an infrared-filtering and UV-blocking version, or an anti-graffiti version that is extra resistant to natural weathering. Force Anti-Slip Glass Walker Glass Company The newest addition to the Walker Textures Traction line of products, Force is an acid-etched anti-slip glass with an all-over finish rather than a pattern. In addition to its safety benefits, the glass offers privacy while allowing for light transmission of up to 91 percent, depending on finish. SF90 Retracting Wall System Hirt Swiss Descending Windows Walls can seemingly disappear with this motorized system powered by Hirt Swiss descending windows. The room-height panes retract a lower-level storage space leaving no threshold behind, with customizable details to match any project. TAPER-LOC Laminated Glass Guard Rail System C.R. Laurence Designed to comply with 2015 IBC code updates, C.R. Laurence’s TAPER-LOC Laminated Glass Guard Rail System is the first ICC-approved glass-railing system on the market. The dry-glaze system is quick to install and features a multiple-hollow design that brings its weight down 30 percent. Isomax Sedak The German glass manufacturer’s new Isomax line allows architects to create glass facades with minimal thermal loss thanks to the introduction of vacuum insulation panels in the cavity. The glass can reach insulation levels of a solid wall without increasing the thickness of the unit—something the Ssedak product manager calls a “quantum leap in insulation technology.”
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Multiple layers of glass combine with corrugated metal panels to balance visibility and privacy in the University of Pennsylvania's new research center.As an experiment in interdisciplinary research, the Krishna P. Singh Center for Nanotechnology at the University of Pennsylvania is not a typical science center. It follows, then, that the university would not want a typical laboratory building, with a central corridor and minimal public space. Instead, the University of Pennsylvania asked Weiss/Manfredi to design the Singh Center around two principles. First, the building should create a new campus green for the school of engineering and applied sciences, in keeping with both the university’s and the city’s tradition of building around open quads. Second, the building should maximize natural light and visibility without compromising the integrity of the research itself. The most outstanding feature of Weiss/Manfredi’s design is the multi-layered glass curtain wall on the Walnut Street side of the building, which was designed with facade consultant Heintges and installed by National Glass & Metal Company. The outermost layer of glass, Guardian SunGuard AG 50 low-E on UltraWhite, which separates the building’s public spaces from the courtyard, achieves transparency while minimizing solar heat gain (the building is on track to achieve LEED Gold certification). It comprises an exterior etched panel by Walker Glass Co. wedded to a reflective panel with interior frit by JE Berkowitz. The etching and frit pattern varies from one part of the building to the next, for a total of five glass pattern modules. “The idea with that pattern was that where views out are most important, it’s most transparent,” said Weiss/Manfredi senior project architect Mike Harshman. “Where it’s more an issue of daylight, it’s more opaque.” The second layer of glass divides the Singh Center’s public spaces from its laboratory spaces. There, Weiss/Manfredi installed a laminated assembly with two layers of translucent frit. Again, the architects aimed for balance, this time between privacy and views out. Interior solar shades allow occupants to shut out daylight—or the eyes of passersby—when needed. On the first floor, an amber glass interlayer demarcates the research center’s 10,000-square-foot Bay/Chase Cleanroom. The color protects the interior of the cleanroom from ultraviolet rays and specific light wavelengths in the visible spectrum without walling it off completely. “Cleanrooms are typically a closed thing, but you can walk in and see everything going on in [there],” said Harshman. Glazed in interior fritted glass, write-up offices front the laboratories themselves, allowing light to enter the general labs. “We really saw the sections—the exterior glass, interior, and glass on [the] labs—as one assembly,” explained Harshman. The design allows daylight to penetrate deep into the building, while the combination of patterned glass and solar shades protects both the researchers and their experiments. The Singh Center facade is not all glass, however. Far from it. “From some views it looks like it’s very glassy, but the glass only represents one-third [of the building envelope],” said Harshman. “The rest is opaque and very insulated. The question became how to clad that surface.” Weiss/Manfredi explored a number of materials, including champagne-colored metal to echo the surrounding brick buildings. Ultimately the University of Pennsylvania chose silver anodized aluminum plate panels, explained Harshman, “because for them the context was technology.” The corrugated panels, which were fabricated and installed by Wyatt Incorporated with a custom finish by Spectrum Metal Finishing, were hung as a rain screen system over a prefabricated highly insulated exterior backup wall. “[There was] a great interest on Penn’s part that the project would have an aspect about scale and light. They liked the idea of the corrugated panels catching light at different times of the day,” said Harshman. The logic of the Singh Center facade culminates in the Forum, the multipurpose conference space that cantilevers over the courtyard. Its back and sides wrapped in protective metal, the Forum’s front wall is fritted glass overlooking the main campus. As a result, the place where researchers present their work is also the most connected to the university and the community around it. In the Singh Center, the University of Pennsylvania did not have to choose between openness and an effective research environment. They achieved both, with a building that turns traditional laboratory design on its head.