The amount of moisture in air. It is usually expressed as the weight of water vapour in a unit weight of dry air Relative - At a given temperature, this is the amount of moisture in air as a percentage of the maximum moisture carrying capacity of the air.
A comprehensive guide to the most common timber terms from A to Z.
The support structure at either end of an arch or bridge. The intermediary supports are called piers.
Across the grain
The direction at right angles to the length of the fibres and other longitudinal elements of the wood.
A substance used to bond two surfaces together.
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.
The velocity of air in the passages between rows of boards in a rack.
Timber that is dried by exposure to air in a yard or shed, without artificial heat (also see seasoning).
Along The Grain
The direction parallel with the length of the fibres and other longitudinal elements of the wood.
A device for connecting timber members to concrete or masonry
Instrument for measuring velocity of airflow.
Exhibiting different properties when measured along its different axes.
Anti-kickback fingers are standard safety equipment on most new table saws. The anti-kickback fingers are incorporated into the blade guard and prevent the stock from being thrown at the operator by biting into it when kickback occurs. As long as the stock if fed through the blade in a normal fashion the anti-kickback fingers don't come into play. It is only when the stock binds and kickback occurs that they are important.
A chemical that is applied to timber to prevent or retard chemical or fungal stain development.
A curved structure resting on supports at each end that supports loads primarily in compression
The sharp intersection of two surfaces, eg. the face and edge of a piece of wood .
A characteristic of an action or production stage in information processing, such as a kiln number or a log grade.
Back sawn timber
Timber that is sawn so that the growth rings are inclined at less than 45 degrees to the wide face.
A rigid or flexible barrier used to direct and control the flow of air.
In drying, a group of timber with similar drying and product characteristics.
Structural member, other than a triangulated frame, which supports load primarily by its internal resistance to bending.