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Posts tagged with "stone":
The ADC industry takes over Atlanta for Coverings to see the latest trends in tile and stone. There, exhibitors from over 40 countries display the newest surfaces across the nine-mile floor plan at the Georgia World Congress Center. Here are a few new products that you don’t want to miss from the largest tile and stone show in North America. Marmi Maximum in Pietra Grey Fiandre With composites of feldspar and other tectosilicate minerals, the veining features a bright finish obtained by a diamond-head honing. The indoor surface is available in two finishes and five sizes. Aspen Anatolia Aspen is a charming porcelain tile that emulates the look of hardwood. It is offered in six finishes with natural wood graining. Terrazzo Ornamenta This playful interpretation on terrazzo boasts accentuated marble grains and aggregate texturing. It is suitable for floor and wall applications and offered in white and clay-hued backgrounds with speckled greens and pinks THICKER Florida Tile This ultra-thick porcelain paver is a burly outdoor flooring solution that is ideal for areas with heavy traffic and load-bearing activities. The tiles' density allow for dry installation and provide coverage while still allowing access to wiring or irrigation systems. #GREEK Versace Ceramics Featuring a Greek mosaic motif, this patterned tile is an ode to the decorative border that lines Greek antiquities. #GREEK is available in metallic- and solid-color finishes in four sizes.
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Located in Dublin’s historic D4 district, Eaton House serves as Eaton Corporation’s new global headquarters. It is located in an early 19th-century Georgian neighborhood containing a mix of residences, small businesses, parks, and embassies. The project occupies the site of five original terrace houses dating to 1830. A new building replaced these houses in 1970 following their demolition. This project, led by Pickard Chilton, was an extensive reuse of the existing 33,000-square-foot concrete frame structure. The architects designed the building retrofit to be of its time while respectful of its historical context, re-envisioning the exterior enclosure in linear coursed stone, clear vision glass, and handmade cast glass bricks. "One of the most important aspects of the facade design process was that this did not replicate the historical context,” said William Chilton, principal at Pickard Chilton. “The city was a great partner in this effort." The architects worked with the neighborhood community and city regulatory agencies throughout the design process to deliver the project. This involved meeting with historic oversight committees very early on in the process before a design was ever proposed. In parallel to this effort, and continuing through the design phases, the architects set regular meetings with residents in the neighborhood. Chilton said these conversations produced a healthy dialogue with the community which helped to inform the design process. "This was a very intense regulatory process, but ultimately very satisfying. The embrace of this project by the community has been particularly gratifying."Once the overall design strategy was confirmed, the design process was executed very quickly over the course of a few months. An analysis of the original terrace houses revealed the facades were organized based on the golden rectangle. The composition of the new facade works within the constraints of the existing 1970’s concrete frame while reflecting the original 19th-century terrace houses in its organization, with clear glass openings recognizing the original golden rectangle proportions. The architects realized these openings would actually decrease the amount of daylight that had been admitted into the building. To maintain their specific proportional composition, but introduce more daylight, the architects introduced cast glass into the facade composition after discovering the durable material was historically integrated into sidewalks in the neighborhood to admit daylight into basement spaces. The glass blocks were handmade to specific dimensions which coordinated with the proportions of the stone coursing dimensions so that mortar lines in the masonry facade would translate uninterrupted into the window composition. The effort led to a more open, productive work environment, improving daylight by 38 percent and helping the project to achieve a LEED-NC Gold rating. The cast glass bricks sit recessed within a secondary frame. Insulated glazing installed to the interior side of the cast glass to ensure thermal continuity without disrupting the unique hand-crafted aesthetic. The glass blocks are supported every few courses with horizontal metal rods. When looking from the interior, this tectonic assembly disappears. "An enormous amount of energy spent around the detailing to make this work,” said Ben Simmons, an associate at Pickard Chilton. “There wasn't a precedent we could look towards." MCA Architects collaborated closely with Pickard Chilton from the onset of the project to execute key exterior enclosure and glazing details like this. The materiality of the primary facade challenged conventional thinking about "historic" materials. After a mock-up comparing brick with a granite stone material, the architects convinced regulatory agencies and the owners to proceed with stone. In the spirit of the historically sensitive project, the installer worked closely with the architects on installation details focused on traditional hand-laid masonry construction craft. Metallic-coated aluminum "portal" frames offer a subtle luster to daylight reflecting off windows, adding a dynamic quality to the facade. This, paired with the sheen of a stone that resembles an iron spot brick, offers a facade that more dynamically responds throughout variable daylighting conditions. Eaton House has been recognized with four AIA awards, including an inaugural award from AIA Europe. "The project was diminutive in size, but quite significant in terms of its impact," said Chilton. "By doing this project, it really opened our eyes to the potential for this type of re-envisioning work. This was the smallest project we've ever done. It underscored our interest and commitment to seeking out projects of quality no matter the scale. If it's an interesting design problem, and the client has aspirations of quality, then we are all in."
Höweler+Yoon combine cutting-edge tech and age-old craft to complete the Sean Collier Memorial at MIT
On April 18th, 2013, the Boston Marathon bombers went on a crime spree that included the killing of Officer Sean Collier who was shot in the line of duty on the MIT campus. In honor of the slain MIT patrol officer, the university commissioned Boston-based Höweler+Yoon Architecture to design the Sean Collier Memorial—a somber, grey stone structure that marks the site of the tragedy. The heaviness of the unreinforced, fully compressive masonry structure is meant to convey the concept of “Collier Strong,” or strength through unity. Thirty-two solid blocks of granite form a contemporary version of a five-way vault. "Our goal was to not post-tension the structure, to make it compressive and use solid blocks," Höweler + Yoon principle Meejin Yoon told AN, "It could have been built out of concrete or steel, but we wanted solid blocks." The large stone pieces were digitally designed and fabricated to work as a self-supporting structural system. Forces are translated into form via a robust combination of cutting-edge computational processes and ancient techniques for making masonry structural spans. The stones were precisely milled within a .5 millimeter tolerance, so that they fit together perfectly to form a compression ring with a keystone that caps the shallow masonry arches. In the center of the buttressed vaults is a covered space for reflection. The buttresses act as walls that extend out to the surrounding campus context. The novel concept required many moving parts to work in harmony. "It is very pure. It is a simple idea," Yoon said. "It took so much collaboration to make this simple idea have the integrity that it did. There were students from 8 degree programs, including a PhD student, undergraduate architecture, undergrads in building technology, and grads in engineering and architecture." Engineering and design were intricately linked form beginning to end. The whole design process was influenced by a feedback loop of physical, analog, and digital models as well as digital simulation. Massive quarried blocks of stone were cut with a single-axis robotic block saw, then with a multiple axis KUKA 500 robot. Robotic milling processes made the tiny tolerances possible. Some of the blocks took as long as seven days to carve, with machines running 24 hours. Often, the cutting tools would wear down, causing the tolerances to change mid-fabrication. The team compensated by altering the digital model and then the next piece would change to match what had been previously carved IRL. Sensors were placed at each joint as the project was assembled on site. As stonemasons placed the high-tech monoliths into the 32-part final assembly, the structure was a choreographed symphony of new technology and timeless craft. The legible visualization of forces is parallel with the MIT ethos of openness and transparency, while the poetic nature of a dry masonry vault represents togetherness of the community in recovery. The project team also included structural engineer Knippers Helbig- Stuttgart, masonry consultant Ochsendorf DeJong and Block Consulting Engineers, landscape architect Richard Burck Associates, civil engineer Nitsch Engineering, geotechnical engineer McPhail Associates, lighting designer Horton Lees Brogden Lighting Design, and electrical engineer AHA Consulting Engineers.
Newport Beach's central government complex emphasizes transparency, sustainability.Bohlin Cywinski Jackson's (BCJ) Newport Beach Civic Center is in one sense classically Southern Californian. With its light steel structure, plentiful windows, emphasis on indoor-outdoor spaces, and roofline inspired by ocean waves, it evokes a timeless delight in Pacific coast living. But it also represents something new, both for the city of Newport Beach and for civic architecture more generally. Built on a marshy site that had previously been written off as uninhabitable, the LEED Gold Civic Center and adjacent 16-acre park, designed by BCJ in cooperation with PWP Landscape Architecture, acts as a different kind of anchor for the automobile-oriented community. "It was shaped in part by a desire to create a great public space," said principal in charge Greg Mottola. "How do you make an urban civic space in the context of the suburbs?" The architects choreographed the Civic Center's entry sequence to transition from highway speeds to the pedestrian scale. The freestanding Council Chambers sits at the entrance to the complex, its white Gore-tex fabric "sail" doing double duty as sunshade and visual trademark. "The sail was really a way to help people understand the Civic Center at 40 miles per hour," said project manager Steve Chaitow. "You turn in there, and as you slow down the scale of the project begins to become more fine-grained." Past the Council Chambers and neighboring community room is the long, low City Hall building, which upends the traditional emphasis on monumentality in favor of democracy. "One of the key issues was the metaphorical and literal transparency of government," said Chaitow. The focus on transparency is expressed both in City Hall's plan, which eschews a grand lobby in favor of outdoor circulation and separate entrances for each department, and its glass facade. To create a public front porch for the building, BCJ covered each bay with a curved roof composed of whitewashed hemlock soffit on a steel frame. The panels provide crucial shading for the east-facing curtain wall, which opens onto the Civic Green. "That roof overhang is 20-30 feet, it's really out there," said Chaitow. "That's what allowed us to have this facade of glass and not pay a penalty." Custom horizontal aluminum louvers on the curtain wall's lower level furnish additional protection against thermal gain. The architects worked with Arup to study the structure blade by blade, to maximize shading without sacrificing visibility. The aluminum extrusions were also designed to stand off the curtain wall, to facilitate window washing. For ventilation, BCJ installed operable clerestory windows between each pair of roof panels. The windows run on an automated system and let in an even northern light that often negates the need for artificial lighting. "A big pull for the client and for us was to try to make this building responsive to its location," said Mottola. "It's been a pretty successful change for them as far as changing the culture at City Hall." Vertical aluminum louvers over City Hall's clerestory windows and other north-facing glazing prevent interior lights from disturbing the neighbors at night. The back-of-house spaces, including conference rooms and patios for staff, are gathered along an open circulation path along the west side of the building. The emphasis on common space prompted the mayor to remark, "I have met more of our City Staff in two weeks here than I did in seven years in our old city hall." Two of the Civic Center's other structures, the Council Chambers and community room, which both feature large sliding glass doors, are partially clad in stone. "We wanted to use some stone because it has a nice relationship to the concept of civic building, but we wanted to use it selectively," said Mottola. Brazilian marble was used on portions of the Council Chambers envelope, while the community room is wrapped in French limestone. The slightly darker French limestone serves to make the community room more recessive, highlighting the Council Chambers. At the same time, the location of the community room within the Civic Center as a whole reveals that it may be the complex's most important building. "The first project you see as you slow down when entering the Civic Center is the city's 'living room,'" said Chaitow. "That's intentional. Symbolically, it was important as a gesture about twenty-first century democracy."
Net zero energy, LEED Platinum project raises the bar on eco-friendly office design.For its new headquarters in Los Altos, California, the David and Lucile Packard Foundation put its building budget where its mouth is. The philanthropic organization, whose four program areas include conservation and science, asked San Francisco-based EHDD to design a net zero energy, LEED Platinum building that would serve as a model of cutting-edge green building techniques. “They wanted to achieve net zero in a way that was replicable, and that showed the path forward for others to follow,” said project manager Brad Jacobson. “It was not just a one-off thing, not just a showcase.” The building’s facade was fundamental to its success as an example of sustainable design. “We were surprised at how significant the envelope is, even in the most benign climate,” said Jacobson. “Pushing the envelope to really high performance made significant energy and comfort impacts, and could be justified even on a first-cost basis.” EHDD began by considering the building’s siting. Because the street grid in Los Altos is angled 40 degrees to the south, orienting to the street would result in a long southwest elevation. The architects asked daylighting consultants Loisos + Ubbelohde what penalty this would entail. “They said you have to keep all solar gain out of the southwest facade; if you do that, the energy penalty will be in the realm of less than five percent,” recalled Jacobson. “But you really have to do an excellent job on sunshading. That was our mission.” EHDD designed deep overhangs over much of the facade’s southwest face, and added balconies and shade trees for additional protection. Where the glazing remained exposed, they installed external movable blinds from Nysan that operate on an astronomic time clock. “The blinds worked really well,” said Jacobson. “We were surprised how easy they were to commission and get working, and how relatively robust they are.” Thermal bridging was another area of concern for the architects. EHDD worked with Atelier Ten on thermal modeling of the wall, and discovered that any metal stud wall would sacrifice performance. They opted instead for wood stud construction, and switched to 24 on center framing to reduce thermal bridging through the framing structure. For insulation, the architects added one-inch external mineral wallboard from Roxul. On advice from structural engineers Tipping Mar, they installed FRP plates to separate external elements like balconies from the main structure. Because of the building’s location, EHDD did not initially consider triple glazing for the Packard Foundation offices. “We wrote it off at first,” said Jacobson. “We thought, that can’t be cost effective in this climate.” But Integral Group’s energy analysis convinced the design team otherwise. The improvement in comfort allowed by triple element windows from Serious Materials (now Alpen HPP) was such that the architects were able to eliminate a planned perimeter heating system, resulting in an estimated savings of twice the cost of the glazing upgrade. “It’s a really good envelope,” said Jacobson. “We did heat sensor testing of the building, and you can really see that it’s working as it’s supposed to. You don’t see the studs, and the windows are not leaking a lot of heat, so that’s been a real success.” The architects clad the building in local and sustainable materials, including FSC-certified western red cedar, stone sourced from within a 500-mile radius, and architectural copper. “Architectural copper is a really interesting material,” observed Jacobson. “It’s actually about 80-90 percent recycled because it’s valued. It doesn’t need refinishing and it patinas nicely. For a building being built to last 100 years, it has a good shot at never needing to be refinished or replaced.” Jacobson summarizes his firm’s approach to the design of the Packard Foundation headquarters as “Passive House light.” “At the same time we were doing a Passive House for a climate science researcher we’d worked with in the past,” he said. “We were working on both and learning from each. It’s a different type of building, but a lot of the same principles apply: good air sealing, eliminating thermal bridging, and pushing the envelope further than you think makes sense.”