BuildingGreen.com LIVE - Passive Survivability

"The drama of a 2x4 shot from an air cannon at glass windows"

Wed, 23 Sep 2009 18:15:00 GMT

Architectural testing concern HTL will be at GlassBuild America shooting missiles at windows again. The demonstration/demolition follows the Miami-Dade large missile protocol by shooting 2x4s at impact-resistant and non-impact-resistant windows. A press release from HTL quotes NGA Industry Events Director Susan Jacob: "There is nothing quite like the drama of a 2x4 missile shot from an air cannon at glass windows." Wish I was going! I checked HTL's website for some footage, but was left wanting. There's a link for client videos (and there's some top name clients in there), but they all seem to be password-protected. So it was off to YouTube to find this:

Another interesting short video — less than two minutes — was shot at last year's Glassbuild conference; a reporter from e-Glass Weekly played word-association with a few exhibitors. If this small sampling is any indication, the fenestration industry does not like the NFRC at all; was optimistic (as of last year) about commercial construction; and thinks green building and LEED are the future.

Living With Climate Change: How to Design Buildings and Communities for Adaptation

Wed, 09 Sep 2009 20:34:00 GMT

The living space in this new home built by Global Green in the Lower Ninth Ward of New Orleans is elevated four feet (1.2 m) to keep it above expected flood level. Numerous other "passive survivability" features are included.

A lot of people have been working for a long time to try to head off global warming — and some progress is being made. Buildings are becoming more energy-efficient, fuel economy standards for vehicles are finally rising again, and use of renewable energy is burgeoning. We need to continue these efforts to reduce greenhouse gas emissions and sequester carbon dioxide, but the reality is that it's too little, too late to prevent climate change. Even if the CO2 spigot were turned off tomorrow, the earth would still see significant warming and the other predicted impacts of climate change: more intense storms, flooding, drought, wildfire, and power interruptions. It's time to design our buildings and the built environment to adapt to the very different climate that scientists say is going to be with us. That's the subject of the feature article in our September 2009 issue of Environmental Building News: "Design for Adaptation: Living in a Climate-Changing World" (requires log-in) (no login required — see Alex Wilson's note in the comments, below). Andrea Ward and I interviewed some of the nation's top climate scientists, including Stephen Schneider, Ph.D., of Stanford, and Jonathan Overpeck, Ph.D., of the University of Arizona, to establish context for the article — making the case that not only is climate change happening, but it's happening more rapidly than the best climate models predicted just two years ago. We address the question of mitigation vs. adaptation — whether we should put effort into preventing climate change or adapting to it — and argue that we must do both simultaneously. "The bottom line is that you've got to adapt to what won't get mitigated," says Schneider in the article. Moving on, we focus on measures for adapting to climate change. We describe 36 strategies, organized into five categories, providing context for each of the categories and succinct explanation for each strategy. These strategies are listed briefly here (details appear in the full article): [More]

82 Tons of Earthquake: Straw House Gets The Shakes

Mon, 06 Apr 2009 16:03:00 GMT

On March 27, a shake-table simulation of twice the ground acceleration of the '94 Northridge CA earthquake was run in the Network for Earthquake Engineering Simulation's Large Structures Laboratory at the University of Nevada on a full-scale model of a strawbale housing unit developed in the wake of the devastating 2005 Kashmir 7.6 magnitude quake that killed nearly 100,000 people and left over three million homeless in Pakistan. Although the Earthquake Engineering Research Institute (EERI)-sponsored test was intended to be to failure, in the end the robust little straw house was still standing and structurally sound — check out the video footage below. The quake-resistant buildings designed by PAKSBAB (Pakistan Straw Bale and Appropriate Building) are intended to be affordable, energy efficient, and locally built with readily available materials. Bamboo rods and nylon fishing net act as the reinforcement and tie-down system; the netting is wrapped under a soil-cement-encased gravel-bag foundation (made with old vegetable sacks), up both sides of the load-bearing baled-straw wall, and attached to the wooden top plates. The wall-tall bamboo, which also engages both the foundation and the top plate, is attached upright in opposing pairs on either side of the wall at frequent spacings and 'sewn' together through the bales, providing flexible resistance to out-of-plane forces. The whole assembly is covered with earthen plaster. The roofing is light corrugated steel. The hand-made structural straw bales — there are no posts or other bearing members — are smaller than those produced by automatic balers, which are rare in developing countries. [More]

Interview with a Green Building Movement Pioneer

Mon, 16 Mar 2009 14:24:00 GMT

Sea Change Radio recently had a great discussion with Alex Wilson. From their website:

Alex Wilson founded BuildingGreen in 1985, when the green building movement was in its infancy. As executive editor of Environmental Building News, the bible of green building, Wilson has provided the information that has formed the building blocks of the movement. In November 2008, Wilson received the Leadership Award for Education from the US Green Building Council, whose board he served on from 2000 until 2005, the crucial period when the organization created the LEED (Leadership in Energy and Environmental Design) certification. Wilson launches the conversation with a primer on green building and its history, starting with an explanation of LEED. He then compares indigenous structural design, such as the Anasazi, who oriented their dwellings toward the sun to capture solar energy, compared to design that developed in the age of cheap fossil fuel, which abandoned age-old principles of efficiency. Wilson points out, however, that the Anasazi civilization collapsed due to reliance on unsustainable water use — a fate our current culture may share with them. Wilson highlights solutions, such as green roofs and urban agriculture which integrates into the built environment, citing the example of City Farm in Chicago. He then proposes the idea of passive survivability, the notion of designing our buildings to survive the kinds of challenges that will become more prevalent as the climate changes, such as power outages and water shortages. The beauty of this idea is that it's exactly the kind of design we need to achieve sustainability.

Download the interview, or stream it at the Sea Change Radio website. Alex starts about 5 minutes in.

Growing Greener

Tue, 03 Feb 2009 12:46:00 GMT

Over 18 years and more than 160 issues of Environmental Building News, I've written quite a few articles — I hesitate to think about how many — but out of all of those, I think I had more fun and learned more in writing my most recent than ever before. "Growing Food Locally: Integrating Agriculture into our Built Environment" examines opportunities for producing food around, and on, our buildings that few architects, builders, or developers have yet considered. I think I had my first vegetable garden when I was five or six — back in Berwyn, Pennsylvania. There were a few years during college and perhaps some of my time in New Mexico when gardening didn't fit into my life. But other than that, growing some of my food has always been important to me. Thus, I surprised myself to realize a few months ago that I had yet to write — or even consider — an article for EBN addressing the potential for integrating food production into our built environment. I had nibbled (sorry!) around the edges with articles about green roofs and passive survivability, but for some reason it never occurred to me to tackle this topic of food production directly. [More]

On the Path to Passive Survivability

Tue, 14 Oct 2008 18:49:00 GMT

Creating a superinsulated building envelope is one of the key requirements with passive survivability. I saw this superinsulated home feature when I was in Sweden last year.

Photo: Alex Wilson. Click for bigger.
(More below.)

Those who have kept an eye on the suggestions we've made over the past few years regarding passive survivability might be interested in some recent developments. By way of background for those who haven't tracked this issue, here's the thumbnail sketch: In an age with more intense storms, terrorist actions against our energy infrastructure, potential petroleum shortages, and drought, we should be designing homes, apartment buildings, schools, and certain other public-use buildings so that they maintain livable conditions in the event of extended power outages or interruptions in heating fuel or water. I had initially been proposing passive survivability as a smart design criterion. More recently I've been advocating that we mandate passive survivability through building codes. There are a number of developments along these lines: [More]