Properties Natural Timber

Properties Natural Timber

Wood and wood

Hundreds of different species of wood, which vary widely in their appearance and properties are generally classified into two major groups of hardwoods and conifers. Hardwoods come from deciduous trees such as ash and oak. Softwoods come from coniferous trees have mostly needle-like leaves – Norway spruce, for example. It is a botanical classification and the terms are only general indications on the hardness of wood – Balsa, for example, is probably the softest wood available for the moment it is classified as hardwood, while if a hardwood, is classified as a softwood.

Traditionally, the conifers are cheap, easily worked wood used in construction houses to the floor, rafters, beams, doors and windows. They are often painted. Hardwood, on the other hand, are generally more expensive and considered as more durable and harder to work. They are used for the manufacture of furniture and sometimes stain finish, then polished or varnished to bring out the natural features decorative grain and texture.

In recent years, many traditional hardwoods UK and Europe as ash, elm and lime – were replaced with varieties from regions of Africa, the Far East and America North and South. Deciduous most common are the so-called 'red' deciduous (mostly mahogany) and ramin yellow, but there is a wide range available by timber merchants.

Due to the high cost of hardwood, it has been largely supplanted in do-it-yourself work itself in boards covered a thin veneer of hardwood (teak or mahogany, for example), widely used in the manufacture of furniture and shelving.

There is good Selection of human advice made available as an alternative to using wooden planks clear: there is also a wide selection of hardwoods and softwood moldings for use at home. The most common sizes of lumber and some types of wood are available in large do-it-yourself superstores and some do-it-yourself for the full range, go to a lumber merchant.

Conversion and seasoning
A tree that has been shot contains much moisture. To make the wood can be used, it must be sawn and dried. These processes are known as conversion and seasoning. Some lumber may be processed.

Saw
The sawn timber is generally:

• through and through (sometimes called plain-sawn or slash-sawn). In this method, the log is cut into planks by simply slicing through the tree. Most of the growth rings form an angle less than 45 degrees with the surface. The water content of a tree is larger around the outside center, So when by-and-through sawn timber is dried all boards, except those that are cut directly in the center of the tree, tend to deform. The boards should be planed flat after drying

• quarter sawn. The wood has growth rings an angle of 45 degrees or more to the surface of the plate. It is often more expensive than through and through sawn timber but much less likely to warp.

Drying
The wood is dried, either by stacking them in open air or by drying in an oven. Drying of wood makes you stronger, more resistant the mushrooms and better quality for painting and varnishing.

Once the wood has been dried it can still gain and lose moisture – It shrinks as it loses moisture and expands as it gains moisture. Wood which has been stored outdoor fall when brought indoors, especially in a centrally heated room. The effect this has on the wood depends on how the wood has been sawn – through and by-sawn lumber tends to warp Whereas quarter sawn lumber tends to decrease equally. Whenever the timber is moved between environments that are likely to have moisture very different, it is important to allow time for wood to come to equilibrium with its new environment. This may be as little as a few days for small sizes but more than a week large.

Conservative Treatment
Some wood is available pre-treated with preservative. This has been pressure impregnated with preservative and lengthen the life of the wood used outdoors and also in the work structure. Cut Ends should also be treated.

About the Author

Also learn how to cure defects in timber stairs and how to carpet stairs and steps

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