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Posted: 9:50 PM Mar 27, 2009
Shake Test at UNR
In 2005, Pakistan experienced a 7.6 magnitude earthquake. 100,000 people were killed, and 3.3 million were left homeless. That inspired one local engineer to put her expertise to work rebuilding in poor rural areas. Truckee resident Darcy Donovan is experienced in building with what some would call unconventional materials. That’s why she thought it made perfect sense to rebuild using straw bales, fishnet and plaster to create homes in rural Pakistan.
Reporter: kendra kostelecky Email Address: kendra.kostelecky@kolotv.com |
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In 2005, Pakistan experienced a 7.6 magnitude earthquake. 100,000 people were killed, and 3.3 million were left homeless. That inspired one local engineer to put her expertise to work rebuilding in poor rural areas. Truckee resident Darcy Donovan is experienced in building with what some would call unconventional materials. That’s why she thought it made perfect sense to rebuild using straw bales, fishnet and plaster to create homes in rural Pakistan.
She says the materials are inexpensive, readily available and 80% more energy efficient than conventional building materials. With the continued threat of earthquakes, there were some concerns about the stability of a straw structure. That’s why Donovan and a team of engineers conducted "shake test" at UNR Friday morning.
The primary concern was how the building was fastened together, and where the structure would show signs of stress. A full-scale 14 by 14 foot straw house was constructed on a hydraulic platform at the school’s Large Structures Laboratory. The building was subjected to 200% more acceleration/shaking than the Northridge quake of 1994. The straw house survived the shaking and remained structurally sound. Donovan says she’s excited about the outcome, and the team is considering more tests in the future.
The team hopes to refine building techniques and reduce costs so the process can be used to help create safe efficient housing in more areas around the world. Donovan is the founder of Pakistan Straw Bale and Appropriate Building or PAKSBAB, whose mission is to adapt and apply straw bale building methods. For more information about the organization, or to find out how you can help please click on the link below.
Latest Comments
Darcy and PAKSBAB's work is a welcome and necessary step in making safe, environmentally sustainable, and energy efficient housing available for all. We have also been working in combining straw bale and earth plastered construction methods in our earthquake prevalent region. In order to receive building permits we had to perform fire testing – from which we received a 3 hour rating, and proved that earth plasters are fireproof. We have been using steel interior frames, including extremely material efficient (and hand made) geodesic domes to make our buildings stand up to earthquake engineering codes. Darcy’s design is very material efficient, easy to construct and we will bring it to the attention of our local building authorities. This ground-breaking (and shaking) work is essential and we join in thanking the research and funding agencies. Thanks also to all the straw bale building pioneers who have shared their knowledge openly. Alex Cicelsky, Center for Creative Ecology, www.kibbutzlotan.com
Congratulations Darcy. Let's hope this building method not only helps Pakistan people, but is also adopted by mainstream western countries.
Great job Darcey! Great project!!!
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