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Displaying 1,101 - 1,110 of 64,641 Publications- Cross-Laminated Timber (CLT) panels have been primarily developed for the building industry. But there have been few instances where CLT panels have been used for bridge deck applications in North America. CLT is prefabricated, lightweight, dimensionally stable, and environmentally sustainable. The use of CLT in bridge structures has been limited and the adoption of CLT into governing bridge design codes has been slow-going in North America. The objective of this project was to investigate the feasibility of CLT as a primary structural material for highway bridge deck applications. To...AuthorsJustin M. Dahlberg, Zhengyu Liu, James Wacker, Douglas R. RammerSourceInternational Conference on Timber BridgesYear2025
- Understanding drivers of plant diversity and distributions is critical for their conservation, particularly among changing environments. While plants’ responses to disturbances are relatively well-studied, in-depth analyses of how they respond to habitat recovery are surprisingly scarce. This is particularly true for one of the most diverse, sensitive, and threatened plant families: the Orchidaceae. To address this knowledge gap, we evaluated the diversity and distribution of terrestrial orchid species within a recovering tropical forest landscape in the Republic of Palau. We tested the...AuthorsBenjamin J. Crain, Melissa K. McCormick, Lawrence W. Zettler, Julian Dendy, Christian P. Giardina, Amanda L. Uowolo, Susan Cordell, Dennis F. WhighamSourceBiodiversity and ConservationYear2025
- Nonnative carp were spotted nearly 75 years ago in eastern Oregon’s Malheur Lake and have subsequently fully colonized the lake and surrounding wetlands, compromising water quality and the growth of native aquatic vegetation eaten by resident and migratory waterfowl. Eradication efforts have proven challenging; only a few carp are needed for the population to rebound. Managers at Malheur Lake are not alone in dealing with this invasive fish; aquatic managers elsewhere in the country face similar issues. Following a Carp Control Workshop in 2010, Jason Dunham, a researcher with the U.S....AuthorsAndrea Watts, J. Ryan Bellmore, Jason Dunham, James PearsonKeywordsSourceScience Findings 275. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 6 p.Year2025
- Dimensional tolerances of mass timber construction typically result in small gaps between mass timber panels. The Fire Design Specification prescribes that when gaps within elements exceed 3 mm the mass timber within the gap must be treated as fully fire-exposed surfaces. Therefore, many of these gaps must be filled with fire protection material. However, the process of protecting these gaps is time consuming and costly. To evaluate the influence of gaps on fire dynamics and char propagation, the authors performed a series of experiments on cross laminated timber panel- to-panel connections...AuthorsWyatt Garrett, Erica Fischer, Laura HasburghKeywordsSourceWorld Conference on Timber Engineering 2025Year2025
What Wood? Ghana Edition: Enhancing a Wood Identification Field Manual with Smartphone Functionality
In the late 2010s, the Timber Industry Development Division (TIDD) of the Ghana Forestry Commission sought to acquire International Organization for Standardization/International Electrotechnical Commission (ISO/IEC) 17020:2012 accreditation. To meet the standard’s requirements, the TIDD, in cooperation with the US Department of Agriculture Forest Products Laboratory, published a standardized wood identification field manual entitled Field Identification Manual for Ghanaian Timbers. To increase the accessibility and utility of this resource for inspectors in the field, this study transforme...AuthorsKyatt Spessert, Frank C. Owens, Adriana Costa, Alberta Asi Ebeheakey, Alex C. WiedenhoeftKeywordsSourceForest Products JournalYear2025- Oak (Quercus) dominance in undisturbed eastern hardwood forests is declining as shade-tolerant species (e.g., red maple; Acer rubrum) gradually replace them (termed “mesophication”), especially on mesic sites. In contrast, compositional change can be accelerated after regeneration harvests as regeneration responds to overstory removal. We evaluated the tree and sapling strata over 17 years in mesic, mature cove hardwood (CHM) and subxeric upland hardwood (UHM) forests, and young cove hardwood and upland hardwood stands created by shelterwood-with-reserves harvests (CHSW and UHSW) to assess...AuthorsKatie H. Greenberg, Margaret WoodbridgeKeywordsSourceForest Ecology and ManagementYear2025
- Deadwood can impact forest food webs through the creation of habitat and provision of resources, but impacts may differ based on initial differences in wood characteristics and over time. Bark beetles like the southern pine beetle (Dendroctonus frontalis Zimmerman) attack and wound pine trees, inoculating them with Ophiostomataceae (Ascomycota; hereafter “blue stain fungi”). Blue stain fungi may increase termite presence in deadwood, and in the surrounding leaf litter, potentially leading to increased abundances of leaf litter invertebrates over time. The effects of deadwood in general,...AuthorsN. V Benedetto, J. J. Riggins, Juliet D. Tang, C. M. Siegert, J. Thomason, N. Dearing, N. A. ClayKeywordsSourceForest ScienceYear2025
- Wood–water interactions are central to wood science, technology, and engineering. In the early twentieth century, the term “fiber saturation point” was coined to refer to the point of transition from the domain where wood properties change with moisture content to the domain where wood properties are constant. This conceptual model assumed that the wood cell walls are water saturated at this transition point and that capillary water appears above this point. This has since then been contradicted by multiple studies. Additionally, the fiber saturation point has been associated with technique...AuthorsMaria Fredriksson, Emil Engelund Thybring, Samuel L. Zelinka, Samuel V. GlassKeywordsSourceCelluloseYear2025
- This paper is part of an interlaboratory study investigating the stability and performance of automated sorption balances. A previous paper in this study investigated the mass, temperature, and relative humidity (RH) stability of automated sorption balances by looking at the mass change of a non-hygroscopic sample over time. In this study, we examine the mass stability of wood samples held at constant RH for seven to ten days after a step change. The reason for the long hold times was to collect data to “operational equilibrium” where the change in mass is on the order of the inherent...AuthorsSamuel L. Zelinka, Samuel V. Glass, Natalia Farkas, Emil E. Thybring, Michael Altgen, Lauri Rautkari, Simon Curling, Jinzhen Cao, Yujiao Wang, Tina Künniger, Gustav Nyström, Christopher Hubert Dreimol, Ingo Burgert, Mark G. Roper, Darren P. Broom, Matthew Schwarzkopf, Arief Yudhanto, Mohammad Subah, Gilles Lubineau, Maria Fredriksson, Wiesław Olek, Jerzy Majka, Nanna Bjerregaard Pedersen, Daniel J. Burnett, Armando R. Garcia, Frieder Dreisbach, Louis Waguespack, Jennifer Schott, Luis G. Esteban, Alberto García‑Iruela, Thibaut Colinart, Romain Rémond, Brahim Mazian, Patrick Perré, Lukas EmmerichSourceAdsorptionYear2025
- The urgent need for climate change mitigation has increased the focus on reducing embodied carbon and energy, particularly in the construction sector. Utilizing sustainably sourced mass timber products provides a low-carbon alternative to traditional concrete and steel structural systems in buildings. These carbon impacts can be quantified by evaluating the total environmental impact of a building, from material extraction and product manufacturing to construction, operation, and demolition. This study evaluated the environmental impacts of a 14-storey mass timber–steel hybrid building in...AuthorsNadia Zahabi, Hongmei Gu, Meng Gong, Janet BlackadarKeywordsSourceBuildingsYear2025