by Web Editor | Sep 2, 2016 | News
Working with Oregon State University (OSU), Skidmore, Owings & Merrill (SOM) has been busy testing its design for a timber tower. The time-lapse video shows a section of the wood tower being submitted to 82,000 pounds of pressure.
SOM has been working on the Timber Tower Research Project, funded by the Softwood Lumber Board (SLB) since 2013. The goal of the project is to develop safe, sustainable building technologies using mass-timber. Using timber may reduce a building’s embedded carbon footprint by as much as 60% to 70% compared to benchmark concrete building. The Timber Tower Research Project has developed a structural system called the Concrete Jointed Timber Frame that employs mass-timber elements with reinforced concrete connections.
Since 2014, SOM and OSU have developed a comprehensive physical testing program, which recently completed a full-scale test to prove the system’s ability to satisfy code requirements. The 36-foot by 8-foot specimen is comprised of a Cross-Laminated Timber (CLT) deck topped with a thin layer of reinforced concrete. The concrete is used to improve structural, acoustic, and fire performance. The composite allows for long spans with a relatively thin cross-section. The 82,000 pounds tested is roughly eight times the required design load. Forty-eight sensors recorded stresses as a hydraulic actuator loaded the specimen over two hours.
To see the video visit The Architects Newspaper: https://archpaper.com/2016/08/som-timber-tower-technology/#gallery-0-slide-0
by Web Editor | Aug 15, 2016 | News
Build With Strength, an industry campaign of the National Ready Mixed Concrete Association, is questioning the use of cross-laminated timber in construction. The group said that wood products can be a questionable building material for several reasons, and that concrete is more fire resistant, provides improved air quality, and is more environmentally responsible.
The trade group said that the only houses standing in parts of Mississippi after Hurricane Katrina were made with concrete. In the event of a large fire, such as those that have burned parts of the western states, the group said that concrete would be a better material.
The association’s Build With Strength campaign is designed to educate design and build and code communities about the benefits of concrete construction in the low to mid-rise sector.
Build With Strength has teamed with the Alabama Concrete Industries Association to present its seminar for architects, engineers, builders and developers. During “A Day of Concrete Knowledge” offered on both Wednesday, September 7, in Huntsville and Thursday, September 8, in Birmingham, the presentation will focus on performance in buildings. Building materials play a big role in energy use and deciding the safety and resiliency of the built environment.
This presentation will explore emerging trends in housing and development; innovations in concrete construction; case studies that showcase building value generation; economical design of concrete wall and floor systems; and how to utilize free resources to design structures. The program offers architects and engineers two hours of professional learning credits, along with four hours of additional concrete-related topics.
From Woodworking Network: https://www.woodworkingnetwork.com/news/woodworking-industry-news/concrete-industry-group-questions-cross-laminated-timber-safety?ss=news,news,woodworking_industry_news,news,almanac_market_data,news
by Web Editor | Jul 27, 2016 | News
Vancouver-based real estate developer PortLiving and world-renowned Japanese architect Shigeru Ban have unveiled plans for an upcoming hybrid timber structure said to be the tallest in the world. If so, this would mean it will be higher than other CLT wood structures, such as the 34-story design planned for Stockholm.
The residential high-rise Terrace house, which will be located in Vancouver’s Coal Harbor neighborhood, may set a new standard for urban luxury in design, sustainability and engineering innovation. The high-rise will feature a cross-laminated timber frame supported by a concrete and steel core. Wood for the project will be locally sourced from British Columbia, minimizing its carbon footprint.
Cross-laminated timber has been gaining popularity as of late, due to its lightness, sustainability, and ease of use. Planks of timber are glued and orientated at 90 degrees to each other, and are then crosslaid in layers. Those pieces are then shipped to construction sites and can be assembled by just a few workers, even for large buildings.
Its use in tall wooden buildings has also been growing. London, Stockholm, and Quebec are just a few of the cities who either already have large timber towers or have one in the works. Recent plans include a Swedish firm’s 436 ft. residential wood skyscraper in Stockholm, while a 12-story mixed wood high-rise is planned for construction in Portland, Oregon.
Building codes are being adjusted in Oregon and Washington State to permit the tall wood structures. But CLT hasn’t gone without opposition.
From Woodworking Network: https://www.woodworkingnetwork.com/news/woodworking-industry-news/canadian-high-rise-will-be-tallest-timber-structure-world?ss=news,news,woodworking_industry_news,news,almanac_market_data,news
by Web Editor | Jul 13, 2016 | News
Projects in Springfield and Portland have landed a collected $200,000 as leaders test the viability of cross-laminated timber.
The funding, awarded by the Business Oregon-backed cleantech champions Oregon BEST and the National Center for Advanced Wood Products Manufacturing and Design, will back research that fast-tracks CLT as a green construction material usable throughout the U.S.
Of that money, $155,000 will go to the planned four-story Glenwood Parking Structure in Springfield. The project’s developers will use the money for research, performance testing and code documentation. The team will measure such factors as vibration, moisture, post-tension loss in rocking shear walls and seismic instrumentation. The SRG firm designed the 360-space structure.
The National Center for Advanced Wood Products Manufacturing and Design, a collaboration between Oregon State University and the University of Oregon, will perform the research and testing functions. The Carbon 12 mixed-use condominium complex in Northeast Portland was awarded $45,000 for acoustic and moisture testing.
According to Oregon BEST, U.S. architects and builders wanting to use the new material in construction projects “must negotiate a maze of additional documentation, atypical performance modeling requirements, unfamiliar construction methods and building code hurdles that can delay CLT projects and has slowed adoption of the material.”
From the Portland Business Journal: https://www.bizjournals.com/portland/blog/sbo/2016/07/new-springfield-portland-buildings-get-200k-to.html
by Web Editor | May 9, 2016 | News
A new bill from Congress would establish performance driven research for advancing tall wood building construction in the U.S.
The “Timber Innovation Act” would:
· Authorize the Tall Wood Building Prize Competition through the U.S. Department of Agriculture (USDA) annually for the next five years
· Create federal grants to support state, local, university and private sector education, outreach, research and development, including education and assistance for architects and builders, that will accelerate the use of wood in tall buildings
· Authorize technical assistance for USDA, in cooperation with state foresters and state extension directors (or equivalent state officials), to implement a program of education and technical assistance for mass timber applications
Recent advances in technology, engineering and safety have made it possible to build taller wooden buildings using newly-developed mass timber products, like cross-laminated timber. In the last five years, 17 buildings between seven and 14 stories have been built using heavy timber construction globally. Canada, Norway, Australia, the United Kingdom, Italy, Sweden and France all have constructed and occupied multiple tall-wood buildings.
Other countries have already been considering wooden skyscrapers. Researchers presented the Mayor of London with plans for an 80-story wooden building just a few weeks ago.
Multiple organizations in the U.S. wood industry, including The American Wood Council (AWC), American Forest Foundation (AFF), Binational Softwood Lumber Council (BSLC) and Southeastern Lumber Manufacturers Association (SLMA), have all announced strong support for the bill.
From Woodworking Network: https://www.woodworkingnetwork.com/news/woodworking-industry-news/new-bill-would-push-research-timber-building-construction-us?utm_source=WIT050616&utm_medium=Email&utm_campaign=WeekInTrees
