by Web Editor | Oct 11, 2017 | News
As a crane lowered a glulam beam and construction workers on either end deftly guided it into connection with two upright wooden columns, a tour group member shook his head and said, “It’s like Lincoln Logs.”
Kind of. Which may in part explain some of the attraction of builders and designers to the potential use of strong, precisely engineered, carbon-storing wood beams, columns, wall panels and floor decking. As Chris Evans, a Swinerton Builders project manager put it, wood is the first building material people use to make the forts, homes and hideouts of childhood.
These days, builders and designers are joining mill owners, university researchers and policy makers in taking a fresh look at advanced wood products, “mass timbers” and what’s come to be called “tall wood” design. Advocates believe it can replace concrete and steel in mid- to even high-rise buildings, and provide an economic jolt to rural Oregon in terms of forest management and mill jobs.
In Hillsboro, Evans and Swinerton Builders are overseeing construction of the largest known U.S. building to date that uses cross-laminated timber, or CLT, for flooring, and glulam posts and beams. The Oregon headquarters of First Tech Credit Union will be five stories high and have 156,000 square feet of office space. Swinerton Builders is the general contractor.
Another tall wood building planned for Portland, called Framework, will be 12 stories high and will have five floors of affordable housing. That project was awarded a $1.5 million federal design competition grant to help with seismic and fire testing and certification.
From Capital Press: https://www.capitalpress.com/Oregon/20171005/nations-largest-mass-timber-building-under-construction-in-oregon
by Web Editor | Sep 22, 2017 | News
The production of cross-laminated timber, or CLT, has the potential to create significant job growth in the Pacific Northwest, according to a study published in July 2017 by Oregon BEST, a Portland-based nonprofit.
CLT is made of layers of glued 2-inch-thick dimensional wood crossing over each other at a 90-degree angle, creating a strong panel that can be used in tall buildings.
The 110-page study, “Advanced Wood Product Manufacturing Study for Cross-Laminated Timber Acceleration in Oregon and SW Washington,” was funded by $120,000 from the U.S. Economic Development Administration. The study included wood products companies from across the region, including D.R. Johnson in Riddle, the first structurally certified CLT producer in the U.S.
Valerie Johnson, president of D.R. Johnson, said she agrees with the study that cross-laminated timber will increase employment for rural areas in Oregon like Douglas County. D.R. Johnson started its first glue-laminated timber, or glulam, plant in 1967 in Riddle, and began producing cross-laminated timber in fall 2015.
“The community is part of the fabric of this company. It’s not only where our employees live it’s where our families have grown up and continue to live, and making this a successful venture is really important to us,” Johnson said. “We’re giving it all we can because we really want it to be successful.”
From Treesource: https://treesource.org/news/goods-and-services/cross-laminated-timber-jobs/
by Web Editor | Sep 11, 2017 | News
Thanks to a partnership with the Oregon State University College of Forestry, D.R. Johnson Wood Innovations in Riddle, Oregon, recently became the first U.S. certified manufacturer of cross-laminated timber.
Cross-laminated timber (CLT) is a massive structural composite panel product usually consisting of three to nine layers of dimensional timber arranged perpendicular to each other, much like layers of veneer in plywood and can be used as prefabricated wall, floor and roofing elements in residential, public and commercial structures. It is extremely strong and flexible, making it resilient to seismic activity.
Lech Muszyński, assistant professor of wood science and engineering, first saw CLT in production during his 2009 sabbatical in Austria. He says those facilities were unlike anything he had ever seen.
“I decided to visit as many as I could because the diversity was astounding,” Muszyński says. “I learned that you don’t need to be a big operation to make a difference in the market.”
Once back at OSU, Muszyński began making the rounds to industry partners to gauge their interest in constructing CLT test panels. He had little success until a meeting of the college’s Board of Visitors. Valarie Johnson, president of D.R. Johnson Lumber was in the room.
From Oregon State University: https://www.forestry.oregonstate.edu/osu-dr-johnson-work-together-produce-cross-laminated-timber
by Web Editor | Aug 21, 2017 | News
Ever since the 10-story Home Insurance Building in Chicago was called the first “skyscraper” in 1885, architects have been striving to create ever-taller buildings. Ten stories quickly became 20, 20 became 50, and on and on. In 2009 the Burj Khalifa in Dubai became the world’s tallest building, with its 154 floors towering above ground level.
So why is the mayor of Portland, Oregon, calling a modest 12-story tower set for completion there next year “a true technological and entrepreneurial achievement?” It’s not the affordable housing the building affords, nor its dozens of bike racks or even the roof farm that has Ted Wheeler gushing. It’s that the Framework apartment building will be made almost entirely of wood.
Once completed, Framework will be America’s tallest wooden building and its first “plyscraper” — a high-rise building built with panels made of cross-laminated timber (CLT). These modular sheets are made from cheap, sustainable softwood that are glued or pinned together in layers — a bit like super-strong, super-thick plywood.
While the raw material might vary in quality, CLT (also known as mass timber) is engineered to be stronger than concrete. CLT panels resist earthquakes and even fire, charring instead of catching alight like the lumber in typical homes.
Plyscrapers can be bolted together in days, and they require a fraction of the labor use to erect traditional steel-and-concrete high-rises. “You don’t need an experienced master carpenter to do this,” says Casey Malmquist, founder of Columbia Falls, Montana-based SmartLam, one of only two CLT manufacturers in the U.S. “It literally goes together like Legos.”
From NBC News: https://www.nbcnews.com/mach/tech/eco-friendly-plyscrapers-are-rise-here-s-why-ncna793346
by Web Editor | Aug 4, 2017 | News
If Yugon Kim realizes his dream, the new office building or housing complex going up in your city may be made out of large hardwood panels called cross laminated timber (CLT). The technology behind CLT has been used for decades in Europe, and it is just beginning to take root in the United States with softwood CLT leading the way. Kim’s Boston-based, architectural design firm IKD just won a $250,000 grant from the Forest Service for designing, developing and constructing the first hardwood CLT demonstration project in the United States.
The aim is to take low-value hardwoods and turn them into a high-value CLT construction project as a proof of concept. Kim explained, “Over 50% of every hardwood log in the region goes to low-value materials like pallets and cants. Our idea is to utilize this material and to upcycle it.”
Kim along with his design partner Tomomi Itakura have created an outdoor CLT construction project that is titled the Conversation Plinth and will be integrated as circular discs that provide a platform for viewing a sculpture at the Cleo Rogers Memorial Library.
Kim suggested, “The ultimate goal is to construct buildings in the United States using hardwood CLT. Our research hopes to lead toward hardwood mass timbers being used for U.S construction projects.”
The Conversation Plinth was designed for Exhibit Columbus, the annual celebration of architecture, art, design and community in Columbus, Indiana. IKD’s design was selected to win an inaugural J. Irwin and Xenia S. Miller Prize as part of a national competition.
From Pallet Enterprise: https://palletenterprise.com/view_article/4927/Hardwood-CLT
