![]() In most countries, industrial wood preservation operations are notifiable industrial activities that require licensing from relevant regulatory authorities such as EPA or equivalent. Industrial wood preservation chemicals are generally not available directly to the public and may require special approval to import or purchase, depending on the product and the jurisdiction where being used. CCA may still be used for outdoor products like utility trailer beds and non-residential construction like piers, docks, and agricultural buildings. CCA was replaced by copper-based pesticides, with exceptions for certain industrial uses. This was a voluntary agreement with the United States Environmental Protection Agency. ![]() wood treatment industry stopped treating residential lumber with arsenic and chromium ( chromated copper arsenate, or CCA). Wood that has been industrially pressure-treated with approved preservative products poses a limited risk to the public and should be disposed of properly. Innovation in treated timber products continues to this day, with consumers becoming more interested in less toxic materials. Treated wood was used primarily for industrial, agricultural, and utility applications, where it is still used, until its use grew considerably (at least in the United States) in the 1970s, as homeowners began building decks and backyard projects. ![]() Commercial pressure treatment began in the latter half of the 19th century with the protection of railroad cross-ties using creosote. Inventors and scientists such as Bethell, Boucherie, Burnett and Kyan made historic developments in wood preservation, with the preservative solutions and processes. During the Industrial Revolution, wood preservation became a cornerstone of the wood processing industry. The Romans protected their ship hulls by brushing the wood with tar. There are records of wood preservation reaching back to ancient Greece during Alexander the Great's rule, where bridge wood was soaked in olive oil. 4.3.4 High-pressure sap displacement systemĪ modern wharf piling bored by bivalves known as shipworms.Īs proposed by Richardson, treatment of wood has been practiced for almost as long as the use of wood itself.3.12.1 Light organic solvent preservatives (LOSP). ![]()
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