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Timber in storage for later processing at a sawmill
Wood cut from Victorian Eucalyptus regnans
The harbor of Bellingham, Washington, filled with logs, 1972

Lumber (American English;<ref>http://www.merriam-webster.com/dictionary/lumber</ref> timber in Australian English, British English, Hiberno-English, and New Zealand English<ref>Oxford English Dictionary Second Edition on CD-ROM (v. 4.0) © Oxford University Press 2009.</ref>) is wood that has been processed into beams and planks, a stage in the process of wood production.

Lumber may be supplied either rough-sawn, or surfaced on one or more of its faces. 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; but it is also readily available in softwoods, such as white pine and red pine, because of their low cost.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Finished lumber is supplied in standard sizes, mostly for the construction industry— primarily softwood, from coniferous species, including pine, fir and spruce (collectively spruce-pine-fir), cedar, and hemlock, but also some hardwood, for high-grade flooring.

Lumber is mainly used for structural purposes but has many other uses as well. It is classified more commonly as a softwood than as a hardwood, because 80% of lumber comes from softwood.<ref>http://www.diffen.com/difference/Hardwood_vs_Softwood</ref>


Lumber sections
Intro  Terminology  Conversion of wood logs  Dimensional lumber  Defects in lumber  Durability and service life  Timber framing  Environmental effects of lumber  See also  References  Further reading  External links  

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Timber in storage for later processing at a sawmill
Wood cut from Victorian Eucalyptus regnans
The harbor of Bellingham, Washington, filled with logs, 1972

Lumber (American English;<ref>http://www.merriam-webster.com/dictionary/lumber</ref> timber in Australian English, British English, Hiberno-English, and New Zealand English<ref>Oxford English Dictionary Second Edition on CD-ROM (v. 4.0) © Oxford University Press 2009.</ref>) is wood that has been processed into beams and planks, a stage in the process of wood production.

Lumber may be supplied either rough-sawn, or surfaced on one or more of its faces. 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; but it is also readily available in softwoods, such as white pine and red pine, because of their low cost.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Finished lumber is supplied in standard sizes, mostly for the construction industry— primarily softwood, from coniferous species, including pine, fir and spruce (collectively spruce-pine-fir), cedar, and hemlock, but also some hardwood, for high-grade flooring.

Lumber is mainly used for structural purposes but has many other uses as well. It is classified more commonly as a softwood than as a hardwood, because 80% of lumber comes from softwood.<ref>http://www.diffen.com/difference/Hardwood_vs_Softwood</ref>


Lumber sections
Intro  Terminology  Conversion of wood logs  Dimensional lumber  Defects in lumber  Durability and service life  Timber framing  Environmental effects of lumber  See also  References  Further reading  External links  

PREVIOUS: IntroNEXT: Terminology
<<>>