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Archive for the ‘CONSTRUCTION’ Category

BY SARAH COWLES

Bay Area landscape studios team with local artisans to evolve CNC-fabricated site elements.

FROM THE AUGUST 2018 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

Alcatraz keeps disappearing, but not because of sea-level rise. “Alcatraz Island has been stolen, replaced, and stolen again,” says Nicholas Gotthardt, a senior associate at Surfacedesign in San Francisco. The irresistible Alcatraz is one element of a large topographic model of San Francisco’s Golden Gate headlands that anchors the visitor overlook at Fort Point National Historic Site, where Surfacedesign was part of a team that designed new site amenities completed in 2014.

The model, made of finely detailed precast concrete, is a literal touchstone at the overlook, which offers dramatic views to the Golden Gate Bridge and San Francisco Bay, as well as a rest stop for cyclists and hikers. Gotthardt recalls the impetus for creating the model: “We wanted to design an interpretive piece that wasn’t signage and words. We wanted something tactile—something people could touch.” Gotthardt had honed his digital modeling skills in the fabrication lab at the Ohio State University’s Master of Landscape Architecture program. With the Fort Point project, he found an opportunity to apply those skills, including fabrication using computer numerical control, or CNC, at the site scale. “The idea of a pancake topo model as the centerpiece of this small urban space came from the officewide comment that ‘We should build more models!’ There isn’t always the time or resources in practice to get into physical modeling the same way that you get to do in school.”

Today both undergraduate and graduate landscape programs provide training and facilities in CNC fabrication, including five-axis mills for sculpting wood and foam, 3-D printers, and laser cutters. Yet this new generation of graduates, facile with the work flow producing CNC models in the design studio, often finds it difficult to ply these skills once they reach (more…)

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BY ANDREW LAVALLEE, FASLA

Pavement and planting beds can play nicely—but it takes thought.

FROM THE JANUARY 2018 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

It is a classic landscape architecture problem: placing pavements next to lawn or planting bed areas. The commonplace nature of this situation belies its complexity, an adjacency that represents an interface between two systems with antithetical requirements. In this case, the edge between pavement and planting bed is an area where an engineered structural system abuts a living horticultural system. Successful design solutions frequently require landscape architects to reconcile competing interests, but it is not always easy, given the demands of a project. In SiteWorks’s practice, we see the pavement–planting edge as a challenge for both designers and contractors alike. The edge merits special attention with regard to how we design and document the condition, how it’s built, and how its thoughtful assembly can benefit long-term performance.

The Basics
Let’s start with what a successful pavement system needs. The structural support of a pavement relies on (more…)

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BY JANE MARGOLIES

Randall’s Island, situated at the center of New York City, has become the park and recreational mecca long dreamed about.

FROM THE AUGUST 2017 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

It’s a sunny afternoon in May, and lacrosse games are in full swing on Randall’s Island, a 516-acre landmass surrounded by water and, beyond, the New York City boroughs of Manhattan, Queens, and the Bronx. Cyclists pedal on a path under the heroic arches of a 1917 railroad trestle. A middle school track team is warming up outside the stadium where Usain Bolt broke the world record in the men’s 100-meter dash in 2008.

The landscape architect Rick Parisi, FASLA, and I are not playing lacrosse or cycling or running. But we are roving around the island—which is bordered by the Harlem and East Rivers, the Bronx Kill, and a treacherous strait known as the Hell Gate. Parisi, the managing principal of MPFP, has helped with the transformation of the island over the past couple of decades, and I’ve asked for a tour of some of his firm’s accomplishments. Besides, I have a special request: (more…)

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BY BRIAN BARTH

One practitioner defies the handicaps of building Information modeling for landscape, determined not to remain an exception.

FROM THE AUGUST 2017 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

Meghen Quinn, ASLA, has a secret. BIM—an acronym that puts moonbeams in the eyes of architects, but makes some landscape architects cringe—is her software of choice. BIM, shorthand for building information modeling, is the 3-D, data-rich software platform embodied by Revit, a product launched in 2000 by Charles River Software and acquired by Autodesk two years later. By 2012, 70 percent of architecture firms in North America reported using BIM, and in 2016 the American Institute of Architects reported that BIM was used for nearly 100 percent of projects at large firms.

It seems that so few landscape architects use BIM, however, that no one has ever bothered to collect the data. Its reputation in the field is as a clunky, building-centric, overly complex tool that has put up yet another barrier between landscape designers and architects.

Yet Quinn, who merged her San Francisco practice with the Office of Cheryl Barton in January, is all moonbeams. Well, mostly. “I never want to use CAD again,” she says. “Moving to BIM is like (more…)

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BY MEG CALKINS, FASLA

New technologies can reduce the environmental footprint of the most-used construction material.

FROM THE JULY 2017 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

Concrete in the 21st century promises to be a more sustainable material, and given the nine billion metric tons used globally each year, it must be. Portland cement, the binding agent in ordinary concrete, has a very high carbon footprint, resulting in just under one ton of carbon dioxide (CO2) released for every ton of cement produced. With 4.2 billion metric tons of the binder used each year worldwide, cement production is responsible for nearly 8 percent of total global carbon emissions. The high lime content of ordinary portland cement contributes about two-thirds of cement’s CO2 impact through the process of limestone calcination. The other one-third of CO2 released is from combustion of fossil fuels.

Technologies to improve the carbon footprint of concrete are currently in the early stages of development, but some, including carbon sequestration in concrete and substantial reductions of cement using energetically modified cement, are now commercially available. Concrete surface products for paving and walls to scrub air pollution, as well as new self-healing concrete products, are also worth investigating. We have heard about some of these innovations for a decade or more in the research community, but many are finally being brought to market—some more quickly than others. Europe is ahead of the United States in the adoption of these technologies, largely because of more rigorous clean air and carbon reduction initiatives.

New technologies in any field can take a long time to move from the laboratory to the marketplace, but (more…)

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Placing Martha Schwartz, FASLA, the past decade has been tricky to folks in the U.S. She has been teaching here, but otherwise has been anywhere else, working away. Now Schwartz has moved back to New York and says she wants to reconnect with her home ground. James Trulove talks with Schwartz in the July LAM about her practice and teaching, a focus on climate hazards, and recent work in China, where Trulove visited two projects in Beijing.

Liz Sargent, FASLA, doesn’t have a slick website or a press packet, but chances are you’ve probably been to one of the cultural landscapes she’s worked on, including nine U.S. World Heritage sites, 33 National Historic Landmarks, and more than 50 National Park Service sites. Kevan Williams takes a deep dive into her work documenting the Blue Ridge Parkway.

Being online means consenting to leaving a trail of personal data wherever we go, but what does consent mean when you’re in public space? Data-tracking furniture in our parks and cities can have a lot of community benefits, but is the technology way ahead of the privacy conversation? Brian Barth looks into the systems that are looking into us.

Also in this issue: podcasts for designers, not just about them; Meg Calkins, FASLA, on new sustainable concrete products; and just in time for your summer road trip, Jane Gillette reviews landscape architect Jack Williams’s Easy On, Easy Off: The Urban Pathology of America’s Small Towns, a book about how highways helped shape the country. The full table of contents for July can be found here.

As always, you can buy this issue of Landscape Architecture Magazine at more than 700 bookstores, including many university stores and independents, as well as at Barnes & Noble. You can also buy single digital issues for only $5.25 at Zinio or order single copies of the print issue from ASLA. Annual subscriptions for LAM are a thrifty $59 for print and $44.25 for digital. Our subscription page has more information on subscription options.

Keep an eye out here on the blog, on the LAM Facebook page, and on our Twitter feed (@landarchmag), as we’ll be posting July articles as the month rolls out.

Credits: “Disrupting the Park Bench,” Melissa Gaston; “Context Clues,” Liz Sargent, FASLA; “Martha Schwartz, Reconnecting,” Sahar Coston-Hardy; “Concrete Minus Carbon,” Chicago Department of Transportation; “Reopened for Business,” EPNAC.COM; “Pictures in Sound,” Courtesy Mark Morris, ASLA.

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BY TRENT OKUMURA, ASLA, AND MICHAEL TODORAN

How to specify complex paving patterns to deflect urban heat from solar exposure.

FROM THE JUNE 2017 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE. 

Designers are challenged by climate change as they attempt to mitigate urban heat, but among the biggest factors are the thermal properties of the very building materials they use in new developments, not least their paving surfaces. The material and color of paving make a critical difference in either contributing to or neutralizing heat gain brought by the sun (as do roofs, which typically involve simpler, monolithic material choices). Darker paving creates a hotter microclimate but lower glare, and lighter paving creates a cooler microclimate and higher glare. The sweet spot in specifying paving lies in brokering a balance between thermal and visual comfort.

The crucial metric is solar reflectance (SR), which is a measurement of (more…)

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