- Timber is a natural material-Grown in UK OR Imported from Europe, America,Russia,Far East.
- Lumber-Just been cut down
- Wood-Raw Material
- Timber-Processed Wood
Two Groups
- Hardwood-Deciduous Tree-Loses leaves in Autumn
- Softwood-Coniferous Tree-Trees with needles/cones
- Indigenous-Local-E.g. Oak in England
Softwood-Fast growing-Cheaper-Sustainable-Scot's Pine, Larch, Spruce, Douglas Fir-Not as dense or strong.
Hardwood-Slow growing-More Expensive-Non-Sustainable-Ash, Oak, Beech, Walnut, Balsa- Denser/More Robust
- Annual Rings-Tell age of trees-Darker rings-Means the tree made resin to protect itself in Winter-E.g.One dark ring to another indicate one year.
Protected Timber-Effect on Environment(Less trees/More CO2)
Forestry Stewardship Council-FSC-Protects the tree.
- Wood is FIBEROUS with fibres running along the length of the trunk.
- 55% of tree is cellulose(Cellulose is an organic compound with the formula (C6H10O5)n, a polysaccharide consisting of a linear chain of several hundred to over ten thousand β(1→4) linked D-glucose units.
- 28% is resin(holds the tree together)
Process of what happens to timber before use?
- Harvesting-Cutting the tree down in the forest
- Conversion-Cutting the trunk and large branches into boards. Slab Sawn Or Quater Sawn
- Seasoning-Reducing moisture content of the timber (Natural or Kiln Dryed)
- Board Preperation-E.g. Sawing to size and planing (PAR Planed All Round)
Slab Sawing-No waste-BUT-Not as Stable-More liable to warp and twist.
Steam bending-Timbers bent around former (like a Mould)
Quater Sawn- More commonly used for expernsive hardwoods-More waste-More Stable-Less liable to warp and twist-often exposes nicer looking grain.
Slab Sawn Board-LONG ANNUAL RINGS-Lots of shrinkage
Quater Sawn Board-SHORT ANNUAL RINGS-Very little shrinkage
- Rough Sawn Timber
- Planed Timber-PAR-Planed All Round-PSE-Planed Square Edge
Timber Mouldings(Moundings-Preped up on a multicutter moulding machine)
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