Properties of Timber

Properties of good timbers are:

Colour:

It should be uniform.

Odour:

It should be pleasant when cut freshly.

Soundness:

A clear ringing sound when struck indicates the timber is good.

Texture:

Texture of good timber is fine and even.

Grains:

In good timber grains are close.

Density:

Higher the density stronger is the timber.

Hardness:

Harder timbers are strong and durable.

Warping:

Good timber do not warp under changing environmental conditions.

Toughness:

Timber should be capable of resisting shock loads.

Abrasion:

Good timber do not deteriorate due to wear. This property should be looked into, if timber is to be used for flooring.

Strength:

Timber should have high strength in bending, shear and direct compression.

Modulus of Elasticity:

Timber with higher modulus of elasticity are preferred in construction.

Fire resistance:

A good timber should have high resistance to fire.

Permeability:

Good timber has low water permeability.

Workability:

Timber should be easily workable. It should not clog the saw.

Durability:

Good timber is one which is capable of resisting the action of fungi and insects attack.

Defects:

Good timber is free from defects like dead knots, shakes and cracks.

 

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