- Shrinkage in a piece of lumber that occurs along or parallel to the growth rings as it begins to dry.
- A piece of wood that has been cut so that it is wider on one edge than the other.
- Abnormal wood found in leaning trees of some hardwood species and characterized by the presence of gelatinous fibers and excessive longitudinal shrinkage. Tension wood fibers hold together tenaciously, so that sawed surfaces usually have projecting fibers, and planed surfaces often are torn or have raised grain. Tension wood may cause warping.
- (1) A term often used interchangeably with grain. Sometimes used to combine the concepts of density and degree of contrast between earlywood and latewood. (2) Texture refers to the finer structure of the wood rather than the annual rings.
- (1) 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. Timbers may be used as beams, stringers, posts, caps, sills, girders, purlins, etc.
(2) Felled trees that are nominally 5 or more inches in diameter.
Tongue and groove
- A joinery method where one board is cut with a protruding "groove" and matching piece is cut with matching grove along its edge.
- Debris (generally metallic) imbedded in a tree and typically not identified until the logs are being milled or turned. The end result is damaged blades (and sawyer's tempers)! Examples include barbed wire, fencing nails/staples, ceramic electrical insulators, horseshoes, bottles and the like.
- Warping in lumber where the ends twist in opposite directions.
The Wood Glossary