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Wood drying (also seasoning lumber or wood seasoning) reduces the moisture content of wood before its use. When the drying is done in a kiln , the product is known as kiln-dried timber or lumber , whereas air drying is the more traditional method.
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 seasoning of lumber is typically either kiln- or air-dried. Defects due to seasoning are the main cause of splits, bowing and honeycombing. Seasoning is the process of drying timber to remove the bound moisture contained in the walls of the wood cells to produce seasoned timber. [33]
Its design features several mid-century inspired elements, such as the starburst pattern on top and boomerang-shaped legs, and it's crafted from a combination of kiln-dried solid and engineered ...
These boards are then taken to the dry kiln, where (because of their size) they can be dried without causing severe damage to the wood. Timber destined for glue lamination must be brought down below 15% moisture before the lamination process will work, so typically these timbers are dried to around 8-10% moisture.
Each kiln could dry more than 50,000 board feet (118 m 3) of lumber. [7] From the kilns, dried lumber was transported to stock sheds for storage. By 1920, the sawmill complex employed more than 1,700 men plus another 1,000 men in logging camps to keep a continuous supply of logs coming to the mill.
The Japanese noborigama kiln is an evolution from anagama design as a multi-chamber kiln where wood is stacked from the front firebox at first, then only through the side-stoking holes with the benefit of having air heated up to 600 °C (1,100 °F) from the front firebox, enabling more efficient firings.
Some species of wood are better assembled green because wood splits less when nailed green. Other species shrink excessively, leaving voids between the individual pieces when allowed to dry. Often wood to be used for fine products, such as furniture, is kiln dried to stabilize it and minimise the shrinkage of the finished product.
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