Category Archives: research

Mass timber buildings come to life

Posted on by | Leave a reply
OFSC construction

The new George W. Peavy Forest Science Center will be unique, not just because of the atmosphere, but because the building will also be a living laboratory.

This living laboratory is one aspect of the SMART-CLT project, led by Mariapaola Riggio, assistant professor of wood design and architecture at Oregon State. The goal of the SMART-CLT project, which stands for “Structural Health Monitoring and Post-Occupancy Performance of Mass Timber Buildings,” is to analyze critical factors impacting the performance of cross-laminated timber during its service life, and develop protocols to monitor these factors in buildings. The SMARTCLT project will study cross-laminated timber on a small and large scale, and will be applied inside the Peavy Forest Science Center, soon to be the new home of the College of Forestry.

“Our project is looking at what is sometimes deemed as ‘serviceability of a structure,’ which includes everything from how the material vibrates, which can be a limiting factor in terms of design for long spans; deflections of the material and acoustics. We’re looking at a variety of factors,” says Evan Schmidt, outreach coordinator at the TallWood Design Institute (TDI).

Riggio says the study is multidisciplinary. The research team involves architects, engineers and industry professionals who will analyze the project from a variety of perspectives. The project is funded by TDI, a collaboration between Oregon State and the University of Oregon and the nation’s leading research collaborative focused on advancing structural wood products.

“It’s not just how the system and the building performs in terms of standard and code requirements, it’s also how it is accepted or how it contributes to the well-being and the comfort of the occupants. That’s why it’s important the project involve a number of partners,” Riggio says.

The living laboratory will provide information for many generations to come.

“Usually research is just a limited amount of time, but this project will last as long as the life of the building,” says Riggio.

The sensors used to monitor the building are a unique aspect of the project, an original idea which will help researchers see what is happening inside the materials of the building.

“We want to understand which approach can be the most effective when analyzing the overall performance while delivering meaningful and valuable information,” says Riggio.

Schmidt says the sensors outfitting the building will monitor the indoor environment, temperature of the mass timber elements, moisture content inside of the wood at various depths and locations, vibration, post-tension loss in the wall systems and more. There will be about 176 different sensor locations.

“We’re measuring a bunch of performance parameters relative to the environment,” Schmidt says. “It’s important to capture because wood is not an inert material. The way it interacts with the environment will impact the way it performs, long-term and short-term.”

While the project will last the life of the building, researchers will also monitor short-term insights during construction to understand the immediate effects.

Researchers believe this project will provide a better understanding of how best to promote the use of mass timber in construction in the U.S.

“We need flagship structures,” Schmidt says. “We need to conduct research during and after construction. The combination of the two will make the public aware and excited about the benefits of mass timber buildings.”

FY 2018 research awards

Posted on by | Leave a reply

The College of Forestry’s world-class students and faculty conduct ground-breaking research within the subjects of forestry, natural resources, tourism and wood science and engineering. Our research happens in labs and outdoors– on public and private lands across the state and in the College’s own 15,000 acres of College Research Forests as well as around the nation and the world.

Contributing to Oregon State University’s second-best year ever in competitive grants and contracts for research, the College of Forestry received $11.04 million in new grants and awards. As Oregon’s largest comprehensive public research university, OSU earned a total of $382 million in the fiscal year ending June 30.

Industry and agency partnerships thrived via the college’s 10 research cooperatives, with more than 100 private industry and government agency members providing an additional $2.18 million to support collaborative research.

Here are some examples of newly funded research out of a portfolio of 40 new projects.

The Role of Managed Forests in Promoting Pollinator Biodiversity, Health, and Pollination Services to Wild Plants and Agricultural Crops

Jim Rivers
Awarded by: USDA National Institute of Food and Agriculture
Amount: $1,000,000

This project will provide new information on how managed forests support healthy pollinators including bees, flies, butterflies, beetles and hummingbirds. Other objectives of the project include determining how pollinator health is influenced by forest management intensity, evaluating whether management changes to pollinator communities alters pollination of wild plants and testing whether forests serve as source habitats for pollinator populations within agricultural landscapes.

CRISPR/Cas9 Mutagenesis for Genetic Containment of Forest Trees

Steve Strauss
Awarded by: USDA National Institute of Food and Agriculture
Amount: $500,000

The goal of this project is to develop and test systems to edit floral genes of poplar and eucalyptus trees.  The edited, non-functional genes should prevent the release of pollen or seeds of these species because their genetically engineered forms are considered undesirable. These trees are often propagated from cuttings, making fertile flowers unnecessary for commercial use. These tools are expected to simplify regulatory decisions, promote public acceptance, and avoid unintended effects from exotic or genetically engineered trees in wild or feral environments.

Automated Landslide “Hot Spot” Identification Tool for Optimized Climate Change and Seismic Resiliency

Ben Leshchinsky
Awarded by: Oregon Dept of Transportation
Amount: $425,090

Landslides are increasingly frequent hazards that affect the operation, maintenance, and construction of Oregon highways, resulting in negative economic, environmental and social impacts for Oregon communities. This project will develop approaches towards creating enhanced means of assessing landslide risk considering topography, rainfall, and seismicity, primarily through the creation of mapping tools. Through these endeavors, planners will be able to maintain the safest and most efficient transportation system possible.

Inventoried landslides used for future projections of landslide hazard.

Monitoring Recreation Use in the Golden Gate National Recreation Area

Troy Hall
Awarded by: USDI National Park Service
Amount: $344,078

This project is developing protocols to monitor recreation use across 21 units of Golden Gate National Recreation Area, the most heavily used National Park in the US.

Multiscale Investigation of Perennial Flow and Thermal Influence of Headwater Streams into Fish Bearing Systems

Catalina Segura
Awarded by: California Department of Forestry and Fire Protection
Amount: $221,271

The impacts of timber harvesting and other land uses on water quality have been an environmental concern for many years. This project will assess the effectiveness of the rules currently applied in California. These rules are aimed at identifying headwater streams that require special protection given their likelihood to influence stream temperature in downstream watercourses.  This project will assess the vulnerability to temperature increases after timber harvesting of fish-bearing streams draining different geologic units.

SusChEM: Naturally Produced Fungal Compounds for Sustainable (Opto)Electronics

Seri Robinson – Co-Principal Investigator
Awarded by: National Science Foundation
Amount: $190,580

The project will explore fungi-derived pigments as a sustainable optoelectronic material for organic photovoltaics.  Wood stained fungi native to the Pacific Northwest will be explored for potential incorporation into solar cells.  Fungi-derived pigments are abundant and represent a largely unexplored resource for organic electronics and renewable electricity generation.  The project is in conjunction with principal investigator Oksana Ostroverkhova in the College of Science.

Lidar- and Phodar- based modeling of stand structure attributes, biomass, and fuels

Temesgen Hailemariam
Awarded by: USDA Forest Service
Amount: $ 164,000

This project will support the growing need for land managers to fully utilize Lidar products to obtain timely and accurate information. The project integrates traditional measures of fuels with remotely-sensed point cloud data to provide estimates of pre- and post-fire fuel mass, volume, or density in physical measurement units and in 3D within the same domain as physics-based fire models, and to scale up observations from fine-scale inputs to physics-based models to coarse scale fuels characterization required by smoke models. Hierarchical sampling across a range of spatial scales will also provide an important sensitivity analysis at varying scales.

Multi-scale analysis and planning to support Forest Service fire management policy

Meg Krawchuk
Awarded by: USDA Forest Service
Amount: $146,511

The purpose of this research is to investigate management policies to address wildfire impacts to human and ecological values. Current suppression policies are not financially sustainable and not desirable from an ecological standpoint.

Towards Resilient Mass Timber Systems: Understanding Durability of Cross-Laminated Timber Connections

Arijit Sinha
Awarded by: USDA National Institute of Food and Agriculture
Amount: $489,793.00

This project will test moisture intrusion and biological decay in cross-laminated timber connection systems to help architects, contractors and product supplies understand how connections in wood buildings will fair over time.

Practical applications discovered for Western Juniper

Posted on by | Leave a reply

Scott Leavengood, director of the Oregon Wood Innovation Center, began his career at Oregon State twenty three years ago as a Klamath County extension agent. Back then, he answered many phone calls from county residents asking what they could do with their western juniper trees.

The wood is strong and durable, and extremely common in Eastern Oregon.

Due to changes in land management practices, wildfire suppression in particular, western juniper acreage in the western United States has increased dramatically in the past 100 years. Thinning juniper stands helps restore rangelands and habitats for animals like the sage grouse, but until recently, there’s been no practical application for the use of this resilient and durable wood species.

“A lot of people were interested in using western juniper in building projects, but for use in structural applications, engineering design values have to be published,” Leavengood says.

Throughout the years, inquiries about western juniper continued, but there were no funds to study juniper-based materials and their market potential until 2015.

USDA Rural Development, the Oregon Department of Transportation and Business Oregon provided funding for juniper testing. Sustainable Northwest managed the project and graduate student Byrne Miyamoto stepped in to do the legwork for the project including small-scale bending, compression and shear tests.

“I spent the entire first summer of the project in the wood shop just cutting samples and making sure there were no defects,” Miyamoto says.

Juniper is a species often riddled with knots and imperfections, making the work difficult, but Miyamoto and Leavengood prevailed and testing was conducted in the summer of 2016. A few durability tests will continue in years to come.

“I have some posts set up in Yaquina Bay in Newport, so we’ll see how well it holds up there and if shipworms attack it,” Miyamoto says. “We examine the samples one a year, and so far we have not seen any attack.”

The results of the western juniper certification project will be published in the National Design Specification in 2018.

“Many key market opportunities couldn’t exist for juniper without published values,” Leavengood explains. “We think that the ability for engineers to use juniper for things like sign posts and guardrail posts will have implications for everything from land management to job creation.”

Miyamoto is focusing on finalizing the focus for his Ph.D. research at Oregon State this fall, and he looks forward to seeing western juniper in use someday soon.

“I’ve spent two years of my life coming up with five values that engineers will be able to use to decide if juniper can be helpful in their projects,” he says. “I’ve spent a lot of time with my juniper samples in the lab, but soon I hope I’ll be able to see the values we produced  in use and say, ‘that was me.’”

Oregon Marbled Murrelet Project

Posted on by | Leave a reply

The marbled murrelet — a small seabird native to the North Pacific — is a flagship species for healthy ecosystems. Murrelets are listed as threatened under the U.S. Endangered Species Act in Oregon, Washington and California, yet little is known about the nesting habits of this curious, short-beaked seabird in Oregon. Enter a world-class research team from Oregon State University.

Gene editing could be the future of forestry

Posted on by | Leave a reply

Distinguished professor Steven Strauss focuses his attention on genetic engineering and gene editing in poplar and eucalypt trees. He’s using genetic technology to make state-of-the-art modifications to a variety of traits, including flowering and productivity.

“We’re working at the DNA level directly,” Strauss says. “In typical breeding you cross and select families of plants to make seeds that are going to be more productive or superior in other ways. By intensive selection and crossing you can change a tree’s DNA considerably, but it’s an indirect effect. In contrast, in genetic engineering we must know the science surrounding the target traits first, not just which plants grow better. This knowledge allows us to modify them at the DNA level.”

Strauss is working with students, faculty and researchers on a new type of genetic technology known as gene editing, or CRISPR. It gives researchers the ability to specify precisely where a genetic change will be made—something that was essentially impossible before. Strauss says the technology is only a few years old and is an exciting step for biotechnology.

By using CRISPR and directing it at different kinds of genes, plants may become disease resistant, pest resistant and more productive.

One genetic change Strauss focuses on is the prevention of pollen and/or seed production.

“It can provide a level of containment, and confidence in containment, that is unprecedented. This should help with public acceptance and regulatory approval, and may improve tree productivity,” Strauss says.

Genetic engineering is used widely in the agriculture. Gene editing will likely be coming to agriculture and medicine in the near future. Strauss says that gene editing could be an important tool for forest tree breeding too, and plans to continue working in this area and exposing his students to the rapidly growing technology.

“It’s mind-blowing in its power,” Strauss says, “and the training students get using it in the lab will help them whether they plan to work in forestry, agriculture, medicine, conservation, or many other biological fields.”

Putting CLT through the fire

Posted on by | Leave a reply

“There’s a dirty little secret about wood,” says TallWood Design Institute researcher Lech Muszynski. “It burns.”

Muszynski studies the fire resistance of cross-laminated timber. When discussing this topic, he often refers to a photo from the great San Francisco fire in 1906. In the photo, two melted steel beams lay across a wooden beam.

The beam burned, while the steel softened. But Muszynski says the old photo proves the difference between flammability and fire safety.

“Materials that do not burn may be less fire safe than wood that does burn, but keeps its load bearing capacity much better,” he says. “In this case, the steel lost its load bearing capacity, while the wood, which didn’t burn completely, retains its ability to bear a load and saves the space below from being crushed.”

Despite this evidence from the early 1900s and recent research conducted in Europe, the American public is still concerned about fire when it comes to wooden buildings, and American construction companies don’t have enough data to ensure tall wooden buildings are up to code. Muszynski hopes to provide this data and put minds at ease with his latest research project, which tests the fire resistance of cross-laminated timber floors and walls.

“The point of my project is not to generate new science, but to provide a large-scale demonstration of how cross-laminated timber panels react to fire,” Muszynski says.

When Muszynski says “large scale,” he means it. Many of the panels he tested in a large furnace at the Western Fire Center in Kelso, Washington were too large to be transported in one piece, and had to be assembled on site.

The samples went into the furnace completely unprotected with any kind of fire-proofing materials typically used in wooden construction. Thermocouples, which measure temperature, were attached to the panels to collect data while the panels were exposed to fire.

Muszynski said that each panel experienced similar, gradual and predictable charring rates: the surface of the panels darkened within two minutes, caught fire and eventually a layer of char formed on the surface of the wood.

“Every floor panel we tested survived two hours of fire exposure,” Muszynski says. “After two hours we cut it off and inspected the sample. Only one wall sample failed after 90 minutes, and that’s still pretty good.”

The next step of the project is evaluating the charred samples. For this, Muszynski employed two Oregon State undergraduates.

“At first he tried to talk me out of the job,” says senior forestry student Cassie Holloway. “We were starting in the middle of summer, and doing this kind of heavy manual labor in the heat is pretty difficult.”

But Holloway and her partner prevailed. They cut each sample into one-foot by one-foot samples and evaluated the char depth to ensure consistency with data from the thermocouples.

Holloway first heard about CLT in her junior seminar class and was immediately intrigued.

“Growing up, I was very interested in conservation and sustainability,” Hollway says. “I think it’s awesome that people are using renewable materials to build up instead of out. I was really excited to be able to work on this project.”

Once sampling is completed, Muszynski says he will work to create a map of the char depth of each sample. Next, he hopes to test the fire resistance of connections used in CLT construction.

“Our ultimate goal is to make the TallWood Design Institute the one-stop place for testing anything mass-timber including CLT and glulam and whatever comes next,” Muszynski says. “This must include fire testing.”