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Decks are often built from pressure-treated wood. Pressure-treated wood is long lasting and holds up to wet and icy conditions. Pressure-treating chemicals are known to be toxic. [2] Both softwood and hardwood decks need to be finished after installation using either an oil or varnish to prevent weathering, wear, mould, algae and wood-boring ...
Lumber’s price drop has been particularly dramatic in just the last 90 days in the futures market, with contract prices for July falling 28% to $466 per thousand board feet (futures prices are ...
Lumber prices. Presently there is a healthy lumber economy in the United States, directly employing about 500,000 people in three industries: Logging, Sawmill, and Panel. [62] Annual production in the U.S. is more than 30 billion board feet making the U.S. the largest producer and consumer of lumber. [62]
Until 2003, most wood sold in the U.S. for outdoor use was treated with chromated copper arsenate (CCA), an arsenic-based preservative. [6] By late 2001, three national manufacturers of children's backyard play sets agreed to a CEH legal settlement calling for them to stop using arsenic in pressure-treated lumber within three months. [7]
Apart from structural wood preservation measures, there are a number of different chemical preservatives and processes (also known as timber treatment, lumber treatment or pressure treatment) that can extend the life of wood, timber, and their associated products, including engineered wood. These generally increase the durability and resistance ...
The crosstie industry began to employ pressure treating as a means of prolonging tie life beginning in the mid-1800s. The first crossties were treated in 1838 with an infusion of bichloride of mercury and laid on the Northern Central railroad in Maryland. [6]