by Web Editor | Jun 7, 2017 | News
Officials in Oregon have approved construction permits for the first all-wood high-rise building in the nation. Construction on the 12-story building, called Framework, will break ground this fall in Portland’s trendy and rapidly growing Pearl District and is expected to be completed by the following winter.
The decision by state and local authorities to allow construction comes after months of painstaking testing of the emerging technologies that will be used to build it, including a product called cross-laminated timber, or CLT.
To make CLT, lumber manufacturers align 2-by-4 boards in perpendicular layers and then glue them together like a giant sandwich before sliding the resulting panels into a massive press for drying. The resulting panels are stronger than traditional wood because of the cross-hatched layers; CLT can withstand horizontal and vertical pressures similar to those from a significant earthquake with minimal damage. They also are lighter and easier to work with than regular timber, resulting in lower cost and less waste.
For this project, scientists at Portland State University and Oregon State University subjected large panels of CLT to hundreds of thousands of pounds of pressure and experimented with different methods for joining them together. The project materials also underwent extensive fire safety testing and met fire codes.
State officials hope the building will stir greater interest in high-rise construction using mass timber and help revitalize the state’s lagging logging industry. Logging, once a major source of revenue in Oregon, has dropped sharply in the past few decades because of greater environmental protections for salmon and the spotted owl. The loss of the industry has devastated some of the state’s rural communities.
From The Register-Guard: https://registerguard.com/rg/news/local/35651365-75/portland-approves-permit-for-nations-first-all-wood-high-rise.html.csp
by Web Editor | May 24, 2017 | News
One building stands out in the old logging town of Prince George, Canada. Encased in a sleek glass facade, the structure towers above most of its neighbors, beckoning from afar with the warm amber glow of Douglas fir. Constructed almost entirely from timber in 2014, the 8-story, 30-meter building is among the tallest modern wooden structures in the world. But it is more than an architectural marvel. As the home of the Wood Innovation and Design Centre at the University of Northern British Columbia (UNBC), it is also an incubator for wooden buildings of the future — and a herald for a movement that could help to tackle global warming.
The building is less like a log cabin and more like a layered cake, constructed from wooden planks glued and pressed together, precision cut by factory lasers and then assembled on site. All told, the university avoided the release of more than 400 tons of carbon dioxide by eschewing energy-intensive concrete and steel, and the building locks up a further 1,100 tons of CO2 that was harvested from the atmosphere by British Columbian trees. In total, that’s enough to offset the emissions from 160 households for a year.
Wooden construction has ancient roots, but only in the past two decades have scientists, engineers and architects begun to recognize its potential to stave off global warming. By substituting concrete and steel with wood from sustainably managed forests, the building industry could curb up to 31% of global carbon emissions, according to research by Chad Oliver, a forest ecologist at Yale University in New Haven, Connecticut. In time, such a shift could help humanity to pull CO2 out of the atmosphere, potentially reversing the course of climate change.
“It’s the plywood miracle,” says Christopher Schwalm, an ecologist at Woods Hole Research Center in Falmouth, Massachusetts. “This is something that could have a significant impact on the riddle that is global environmental change.”
From Nature.com: https://www.nature.com/news/the-wooden-skyscrapers-that-could-help-to-cool-the-planet-1.21992
by Web Editor | May 8, 2017 | News
The Sustainable Forestry Initiative Inc. (SFI) announced today that SmartLam, LLC, is the first U.S. manufacturer of cross laminated timber (CLT) to be certified to the SFI 2015-2019 Chain-of-Custody Standard. SmartLam is also the first manufacturer to produce CLT in the U.S.
SmartLam manufactures CLT for a variety of applications, including floor, roof and wall systems. SFI’s Chain-of-Custody Standard helps companies address the growing demand from governments, customers, and consumers for responsibly sourced forest products.
CLT is the next-generation of engineered wood products. Extensively tested and already widely used in Europe, CLT has vast applications for construction, industrial matting and bridging. Architects and builders choose wood because it looks great, has numerous environmental characteristics – including renewability – and it’s easy to work with. In addition, trees absorb carbon dioxide from the atmosphere as they grow, sequestering and storing the carbon while producing oxygen which reduces greenhouse gases and improves air quality.
“At SmartLam, we make CLT, but we like to tell our clients what we really sell is time. CLT increases construction speed and reduces a project’s cost and carbon footprint. Now, with certification to the SFI Chain-of-Custody Standard, we can also offer our clients supply chain assurance that our products are sourced from well-managed forests that are third-party certified to SFI’s rigorous standards,” said Casey Malmquist, President and General Manager at SmartLam.
SmartLam produces CLT at its Columbia Falls facility in Northwest Montana and is part of a global movement to use wood in tall buildings. Advances in technology are producing more engineered wood products and mass timber products that increase the capabilities of building with wood.
From PR Newswire: https://www.prnewswire.com/news-releases/smartlam-is-first-us-clt-manufacturer-to-earn-sfi-chain-of-custody-certification-300452619.html
by Web Editor | Mar 29, 2017 | News
Over the past several years, there has been a rise in mass timber construction around the world, demonstrating the strength, stability, and design flexibility of next-generation lumber technologies. To help inform architects, engineers, developers, industry professionals, students and interested parties, reThink Wood has launched the reThink Wood Research Library to serve as the go-to industry resource for those seeking information on the latest advancements in wood’s performance and advantages in the built environment.
reThink Wood is a body of research hoping to push boundaries and shift perceptions about building with wood.
Today, mass timber technologies, including cross-laminated timber (CLT), nail laminated timber (NLT) and glued laminated timber (glulam), are gaining traction in the U.S. for mid-rise and tall wood structures. The publicly accessible and comprehensive reThink Wood Research Library will be frequently updated with the latest research on wood building products and systems worldwide, as well as demonstrate where research gaps currently exist.
“The future of mass timber in the U.S. is really starting to heat up,” said Lucas Epp, head of engineering at StructureCraft. “In the next few years, there will be considerably more mass timber buildings built than we have today. The industry is starting to see that this type of construction is fast, cost effective and sustainable.”
Advocates of CLT say it can be used to construct buildings of equal strength and fire-resistance as those made of steel and concrete. It has also fueled the passions of architects and environmentalists, who believe it to be a much greener method for housing the world’s growing population.
From Woodworking Network: https://www.woodworkingnetwork.com/news/woodworking-industry-news/wood-research-library-advances-timber-building-construction?ss=news,news,woodworking_industry_news,news,almanac_market_data,news,canadian_news
by Web Editor | Feb 3, 2017 | News
For centuries, wood was civilization’s primary construction material, but as the use of concrete, glass and steel grew, wood was largely relegated to flooring and interior paneling.
An exhibition at the National Building Museum in Washington challenges that narrow use. It suggests that tomorrow’s buildings will or should be constructed of wood. The exhibition, “Timber City,” highlights the wide range of benefits offered by cutting-edge methods of timber construction, showing that wood is a modern, strong and versatile material.
The show highlights the two winners of the Tall Wood Building Prize, sponsored by the U.S. Department of Agriculture. “One in New York City and one in Portland, Oregon, are two premier cross-laminated (engineered, pre-fabricated) timber buildings going up right now,” said the exhibition’s curator, Susan Piedmont-Palladino. “They’re similar structures. Both buildings are using this material … in slightly different ways, but the goal is to build right in the middle of the city.”
And that’s what makes timber the perfect choice in a busy district like New York’s Manhattan, where construction speed and efficiency are vital. “Buildings go up very quickly. The materials for the building — the walls and the floors and the ceilings — are manufactured off-site. They come on a truck, pre-fabricated,” Piedmont-Palladino said. “So a work crew armed with power screwdrivers can basically assemble the building extremely quickly. There’s no long-term curing of concrete” needed.
Information panels in the exhibition explain that concrete manufacturing is the world’s third-largest source of greenhouse gases, and that harvesting timber — a renewable resource — has a lower environmental cost than mining the materials needed to make steel and concrete.
From VOANews.com: https://www.voanews.com/a/museum-cross-laminated-wood-building-material/3697202.html
