Category: Glossary of Terms -M

Wood containing an accumulation of mineral matter introduced by sap flow, causing an unnatural color ranging from greenish brown to black.

Includes all defects or blemishes that are produced in manufacturing, such as chipped grain, torn grain, skips in dressing, hit-and-miss (a series of surfaced areas with skips between them), variation in machining, machine burn, and mismatching.

Management of land resources with the objective of achieving optimum yields of products and services from a given area without impairing the productive capacity of the site.

Concept of forest management that combines two or more objectives, such as production of wood or wood-derivative products, forage and brown for domestic livestock, proper environmental conditions for wildlife, landscape effects, protection against floods and erosion, recreation, and protection of water supplies.

Moulding

An extremely narrow bevel along a cutting edge, which increases the sharpness angle for greater edge durability.

Medium density fiberboard, very stable underlay for counter tops etc. to be covered with laminate.

Lumber that has been evaluated by mechanical stress rating equipment; each piece is nondestructively tested and marked to indicate the modulus of elasticity. MSR lumber is also required to meet certain visual requirements.

The weight of water contained in wood expressed as a percentage of the weight of the oven dry wood. NOFMA/NWFA hardwood flooring is manufactured at 6 to 9 percent moisture content, with a 5 percent allowance for pieces up to 12 percent moisture content.

The equivalent fibre stress at maximum load. A constant used in structural design and obtained by loading pieces of wood to destruction. Modulus of rupture is an accepted criterion of strength, although it is not a true stress because the formula by which it is computed is valid only to the elastic limit.