Lumber

Lumber

Timber after it has been sawed and split into planks or other smaller components that can be used as building material.

Industry: Building materials

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Lumber

Movement

Building materials; Lumber

The extent of expansion and contraction which occurs with dried wood as its moisture content responds to changes in relative humidity in service.

Texture

Building materials; Lumber

Characteristic determined by the size and quality of the wood elements. Descriptive terms include fine, medium, uniform, even, uneven, coarse.

Preservative

Building materials; Lumber

Any substance that is effective in preventing , for a reasonable period of time, the development and action of fungi, borer and insect attack in wood.

Sap stain

Building materials; Lumber

A discoloration in wood that may be caused by microorganisms, metal, or chemicals. The term also applies to materials used to impart colours to wood.

Hardwood

Building materials; Lumber

A general term for lumber of broad leafed trees classified botanically as Angiosperm. The term has no reference to the relative hardness of the wood.

Kerfing

Building materials; Lumber

Making a series of parallel saw cuts part way through the thickness of a piece of lumber so that the piece can be curved towards the kerfed side.

Distortion

Building materials; Lumber

A drying defect caused by the differential shrinkage along the three axes of a piece of wood. Distortion may take the form of cup, bow, twist, spring or diamonding.