Lumber

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Lumber or timber is wood in any of its stages from felling through readiness for use as structural material for construction, or wood pulp for paper production. (The distinction between the two terms is discussed below.)

Lumber is supplied either rough or finished. Besides pulpwood, rough lumber is the raw material for furniture-making and other items requiring additional cutting and shaping. It is available in many species, usually hardwoods.[citation needed] Finished lumber is supplied in standard sizes, mostly for the construction industry, primarily softwood from coniferous species including pine, fir and spruce (collectively known as Spruce-pine-fir), cedar, hemlock, but also some hardwood, for high-grade flooring.

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Terminology

In the United Kingdom and Australia, timber is a term also used for sawn wood products (that is, boards), whereas generally in the United States and Canada, the product of timber cut into boards is referred to as lumber. In the United States and Canada, timber often refers to the wood contents of standing, live trees that can be used for lumber or fiber production, although it can also be used to describe sawn lumber whose smallest dimension is not less than 5 inches (127 mm)[1] such as the large dimension and often partially finished lumber used in timber-frame construction. In the United Kingdom the word lumber has several other meanings, including unused or unwanted items.

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