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abutment
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The support structure at either end of an arch or bridge. The intermediary supports are called piers.
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across the grain
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The direction at right angles to the length of the fibres and other longitudinal elements of the wood.
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adhesive
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A substance used to bond two surfaces together.
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agenda 21
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Agenda 21 is a comprehensive plan of action for achieving sustainable development in the 21st century. It includes a wide range of economic, social and environmental factors that affect sustainable development. Chapter 11 of Agenda 21, the major output of the United Nations Conference on Environment and Development (UNCED) in Rio de Janeiro, 1992, deals specifically with forestry issues.
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air velocity
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The velocity of air in the passages between rows of boards in a rack.
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air-dried timber
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Timber dried by exposure to air in a yard or shed, without artificial heat (also see seasoning).
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along the grain
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The direction parallel with the length of the fibres and other longitudinal elements of the wood.
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anchor bolt
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A device for connecting timber members to concrete or masonry
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anemometer
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Instrument for measuring velocity of airflow.
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anisotropic
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Exhibiting different properties when measured along its different axes.
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anti-stain chemical
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A chemical applied to timber to prevent or retard chemical or fungal stain development.
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arch
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A curved structure resting on supports at each end that supports loads primarily in compression
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arris
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The sharp intersection of two surfaces, eg. the face and edge of a piece of wood .
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attribute
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A characterisitic of an action or production stage in information processing, such as a kiln number or a log grade.
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