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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.
Drying hops for brewing (known as a hop kiln or oast house) Drying corn (grain) before grinding or storage, sometimes called a corn kiln, corn drying kiln [8] Drying green lumber so it can be used immediately; Drying wood for use as firewood; Heating wood to the point of pyrolysis to produce charcoal; Extracting pine tar from pine tree logs or ...
The Thermo wood process consists of drying, heat treatment and finally cooling/conditioning, and takes up to 72 hours. [4] The Plato process consists of hydrothermolysis, dry curing and conditioning, and can take up to 7 days. The required time depends on wood species, width and initial moisture content. [5]
By going beyond kiln drying wood, heat treatment may make timber more durable. By heating timber to a certain temperature, it may be possible to make the wood fibre less appetizing to insects. By heating timber to a certain temperature, it may be possible to make the wood fibre less appetizing to insects.
Edging will take the flitch and trim off all irregular edges leaving four-sided lumber. Trimming squares the ends at typical lumber lengths. Drying removes naturally occurring moisture from the lumber. This can be done with kilns or air-dried. Planing smooths the surface of the lumber leaving a uniform width and thickness.
This drying-out causes movement and shrinking of the log's diameter. As logs and timbers dry, the differential shrinkage (radial versus tangential) causes small cracks (known as "checks") to open slowly over time. Checking is a natural process in both air- and kiln-dried logs.
CLS timber is kiln-dried and is white wood. [9] Tree sources include Fir, Pine and Spruce. [10] [6] CLS is planed and fished with eased or rounded edges. [9] [11] CLS timber is commonly graded at two strengths, C16 or C24. [9] C24 is the stronger and is typically more expensive. [10]
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.