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Characteristics of wood - Coggle Diagram
Characteristics of wood
Wood
Strong in the direction of the grian (along the grain) and weker across the grain
Converted (from the tree it is swan into useable pieces) and then seasoned (air or kiln) to remove the excess moisture, 80-90 percent, before use.
Seasoned to help prevent defects such as twisting, warping, cracks, cupping, or bowing; to reduce the time taken to season wood, trees should be felled in the winter when they grow less, have less sap, and therefore contain the least moisture.
Seasoning wood
Gives greater immunity from decay and increased resistance to rot.
Increases strength and stability
Helps preservatives to penetrate
Makes wood less corrosive to metals
Kiln seasoning
This is expensive, using controlled temperature and humidity levels.
The wood is stacked on trolleys.
It is initially steamy in the kilen then becomes hotter and drier
It is a quick process, taking up a few weeks.
The wood is used for indoor products
Air Seasoning
It is traditional and inexpensive
Wood is staked in a shelter outside, protected from the rain.
Air circulates between the planks to remove excess moisture.
It is a slow process, taking up one year.
The wood is used for outdoor products.
Hard Wood
A wood from a broad-leaved (deciduous) tree.
Soft Wood
A wood from a cone-bearing (coniferous) tree.