Two tree species native to the Northeast have been found to be structurally sound for use in cross-laminated timber (CLT) products.
Eastern white pine and eastern hemlock passed strength testing by a University of Massachusetts Amherst timber engineer. The findings, published in the Journal of Materials in Civil Engineering, suggest that these species could support local markets for CLT.
Researchers made composite building panels by gluing together wooden boards from hemlock and pine trees, and then broke them in a strength-testing machine. The researchers analyzed the results, comparing them to engineering requirements, and found that both tree species met building standards, with eastern hemlock outperforming pine.
Salvaging wood from eastern hemlock is a key forest-management priority because the trees are under attack by an insect, the hemlock wooly adelgid. The insect doesn’t harm the wood, but it kills the tree that then becomes hazardous fuel for forest fires.
Related Stories
| Feb 26, 2013
ANSI standard for interior doors open for second public ballot
WDMA I.S.6A-11, Industry Standard for Interior Architectural Wood Stile and Rail Doors and WDMA I.S.1A-11, Industry Standard for Interior Architectural Wood Flush Doors, are now open for their second ballot for recognition as American National Standards.
| Feb 26, 2013
CRSI releases new technical note on stainless steel reinforcing bars
The Concrete Reinforcing Steel Institute (CRSI) has released a new technical note, Frequently Asked Questions (FAQ) about Stainless Steel Reinforcing Bars, to its online collection.
| Feb 26, 2013
Proposed ASHRAE standard revisions would boost requirement for automatic lighting
Proposed changes to the ASHRAE/IES energy standard would require automatic lighting controls in more space types and shorten the times before lighting is automatically reduced or shut off.
| Feb 20, 2013
Bill would make all California state building codes free and open source
California Assembly Bill 292 would make the California Code of Regulations (including the Building Codes) open source.
| Feb 20, 2013
Pittsburgh’s Phipps Conservatory aims for three top green certifications
The $15 million Center for Sustainable Landscapes at Phipps Conservatory and Botanical Gardens in Pittsburgh, a net-zero facility, is applying for certification from three of the world's most stringent green rating systems—the Living Building Challenge, LEED Platinum, and the Sustainable Sites Initiative.
| Feb 20, 2013
ANSI/CRRC Cool Roof Standard has been approved
The Cool Roof Rating Council says the American National Standards Institute has given final approval of its ANSI/CRRC-1-2012 Standard after a two-year public review process.
| Feb 20, 2013
Group of West Coast civil engineers developing building standards for tsunamis
A group of civil engineers from around the western U.S. is developing additions to the building code to address the threat of a tsunami.
| Feb 20, 2013
Higher standards, efficiency programs keys to 40% energy usage reduction in commercial buildings since 1980
Commercial buildings have seen a drop in their energy intensity of more than 40% since 1980, according to a recent report from Bloomberg New Energy Finance and the Business Council for Sustainable Energy.
| Feb 12, 2013
Higher education institutions providing leadership on sustainability
More than 665 U.S. colleges and universities have publicly committed to pursue net-zero carbon emissions.
| Feb 12, 2013
ASHRAE publishes protocols for performance measurement
ASHRAE has published “Performance Measurement Procedures for Commercial Buildings: Best Practices Guide,” a how-to guide for continuously evaluating and improving the performance of commercial buildings throughout their service life.
