As fresh timber which is obtained from trees contains about 30 to 40 % sap or moisture. This sap is very harmful for the life of a timber. Therefore, it is necessary to remove that sap by applying some special methods. All those methods which are used for removing the sap from timber are collectively termed as seasoning of timber.
Types of Timber Seasoning:
The main types of timber seasoning are as under.
(1)Natural Seasoning, (2)Artificial Seasoning,(a) Kiln Seasoning,
(b) Chemical Seasoning,
(c) Electric Seasoning,
(3) Water SeasoningGrey, timber and arctic.
The duration of Timber Falls is 1.67 hours.
For small craft, treated kahikitea is often used. kauri used to be used, but is too scarce a resource to be used this way any longer.
amoretti?
there are nine types of calendars used in India
there are lots of techniques by which we can improve the life of a timber like seasoning of timber,by applying different types preservatives coat before it is used.
While seasoning, timber can warp, making it unuseful.
Seasoning of timber is the drying of timbers moisture content to a level below 22% by several methods, including Air seasoning, kiln seasoning or a combined of both. Seasoning of timber allows wood to be used for practical purposes whether it be for shaping, constructional purposes, what ever the need for timber, it must be seasoned.
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advantages and disadvantages
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because it needs to have increased dimensional stability, increased strength, an reduce weight issues
Different types of PVA are used to join timber.
The two types of seasoning are the natural/air seosoning and the kiln seasoning
Equilibrium Moisture Content
1) Air Seasoning Advantages : No expensive equipment needed, Environmentally friendly Disadvantages :Takes longer than Kiln seasoning 2) Kiln Seasoning Advantages: Insects are killed during this process, Require little stacking space, Moisture content of the timber may be brought to any desired level Disadvantage: It is expensive , It gives a little weaker timber when compared to air seasoning
The 2 main types of timber are Softwoods and Hardwoods.