Timber that is sawn so that the growth rings are inclined at less than 45 degrees to the wide face.
Back sawn timber
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.
A sub floor timber beam placed across piers or stringers and supporting floor joists
An artificial ridge of earth
Any angle not at 90 degrees. Also, a tool for marking such an angle.
The breaking down of timber by natural or biological agents such as fungi and insects.
Biodiversity is the variety of all life forms: the different plants, animals and micro-organisms, their genes and the ecosystems of which they are a part. Biodiversity underpins the processes that make life possible.
All living animals and plants
Figure on the surface of wood that has numerous rounded areas resembling small eyes.
The notch in a rafter that rests on the top plate of a wall.
1. A piece of sawn, hewn, or dressed timber of greater width than thickness. Usually 19 mm to 38 mm thick and 75 mm or more wide. 2. Manufactured products supplied as rigid or semi-rigid sheets, eg. fibreboard and particle boards.
The forest areas of the Northern North Temperate zone dominated by coniferous trees such as spruce, fir and pine.
A botanical name is the formal scientific name conforming to the International Code of Botanical Nomenclature (ICBN) and, if it concerns a plant cultigen, the additional cultivar and/or group epithets must conform to the International Code of Nomenclature for Cultivated Plants. The botanical names of Australian and imported species of timber and their relationship to trade names are defined in AS 2543 Nomenclature of Australian Timbers and AS 1148 Nomenclature of Commercial Timbers Imported into Australia.
Moisture which is closely bound to the cell wall constituents of wood.
Water molecules bound into the cell wall of timber. They are weakly bound chemically to the molecules of the cell wall and energy is required to break them free.
A curvature in the longitudinal direction of a board causing the wide face to move away from a flat plane.
A truss where the top chord of the truss is curved to an arch shape.
A built-up beam with solid timber flanges (a) and plywood or wood-base panel product webs (b).
Secondary structural members that normally do not support gravity loads but are required to provide lateral stability to other structural members or to transfer horizontal loads to the supports.
Bracing installed between floor joists to stiffen floor and distribute live loads. Also called cross-bridging.
In wood, any decay caused by fungi that attack cellulose rather than lignin, producing a light to dark brown friable residue.
Building Material Ecological Sustainability Index
The Building Material Ecological Sustainability Index is based on life cycle assessment but attempts to combine a number of criteria into three primary ones. There are: resource depletion, inherent pollution & embodied energy. These characteristics within these criteria are given a rating from 1 (not important) to 5 (very important) in terms of their environmental impact.
1. A hard, woody outgrowth on a tree, more or less rounded in form, usually resulting from the entwined growth of a cluster of buds. Such burls are the source of the highly figured burl veneers used for purely ornamental purposes. 2. In lumber or veneer, a localised severe distortion of the grain generally rounded in outline.
An end joint formed by abutting the squared ends of two pieces of timber.