Lumber is simply solid wood that has been sawn to a particular size. Traditionally produced from very large diameter logs, lumber is now often made from logs as small as 8 to 12 inches (20 to 30 cm) in diameter. A variety of equipment is used to produce lumber. Newer mills that process softwood logs combine scanners, computers to calculate optimium sawing sequences, and high speed, thin-kerf saws designed to obtain maximum lumber yield. The newest "lumber" products are not lumber at all in the traditional sense, but composite products created from veneers, thin flakes, or other materials such as plastic. Such products have more uniform strength properties than solid-sawn wood and can be made to large sizes even when using small trees as raw material. Lumber is always measured, bought, and sold based on nominal, rather than actual, sizes. Measurements are affected by moisture content and, in the case of hardwoods, by whether boards are surfaced or unsurfaced. Also see Yield.
1. A wood product manufactured from logs by sawing, resawing, and, usually, planing, with all four sides sawn. ("Timber" is used in place of "lumber" in many countries.) 2. To log or to manufacture lumber.
Lumber is the product of the sawmill and planing mill not further manufactured other than by sawing, resawing, and passing lengthwise through a standard planing machine, crosscutting to length, and matching
Lumber or Timber is a term used to describe wood, either standing or that has been processed for use—from the time trees are felled, to its end product as a material suitable for industrial use—as structural material for construction or wood pulp for paper production. In the U.K. 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 sawn wood products of five inches diameter or greater (4Â½â€³ nominal size) are sometimes called "timbers".