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Casehardening Of Lumber: What It Is And How To Relieve It

By Scott Lyon, WI DNR Forest Products Specialist

Lumber manufactured into interior wood products (e.g., furniture, flooring, millwork, cabinets) typically requires kiln drying to reach a targeted moisture content to minimize dimensional changes. In Wisconsin, this dry-basis moisture content is 6-8%. Not only does kiln drying allow the wood to equalize to desirable and usable moisture content, it kills fungi and insects that might be present in the lumber.

However, drying stress—commonly called casehardening or tension set—occurs during the drying process. Casehardening is a normal part of the drying process of lumber. It is critically important to relieve this stress as it can lead to warping and twisting when lumber is later re-sawn or machined.

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Merchandizing Urban Trees

By Scott Lyon and Alex Anderson, WI DNR Forest Products Specialists

An urban tree is most valuable while it’s living. However, if that tree is killed or damaged, there are ways to recycle it. As the “buy-local” movement continues to gain momentum, urban wood recycling efforts have increased in Wisconsin. Historically, urban trees were utilized by only a few mills in the state. With the increased number of trees killed by invasive insects and disease, though, municipalities and arborists are seeking alternative uses for urban wood materials, and interest has grown among traditional forest products manufacturers (sawmills, bolt and pallet mills, pulp mills, etc.) to procure this ever-growing resource. 

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Carbon In Wisconsin Forests

By Brian Anderson, WI DNR Forest Inventory Analyst and Dan Buckler, WI DNR Urban Forest Assessment Specialist

Wisconsin forests play a major role in accumulating carbon from the atmosphere, but not all forests sequester and store carbon in the same way over time. A new document identifies some of these differences and outlines key metrics of carbon in Wisconsin’s forests.

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Pandemic Assistance for Timber Haulers Closing Soon

In July, the U.S. Dept. of Agriculture announced a Pandemic Assistance for Timber Harvesters and Haulers (PATHH) program to address losses due to COVID-19. The $200 million fund was opened on July 22 and closes on October 15 of this year and is being administered by the Farm Service Agency in conjunction with the U.S. Forest Service. Visit this link for more information.