What are the defects in Timber due to Defective Seasoning?
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Faulty method of seasoning causes serious defects in woods. During seasoning of timber, exterior or surface layer of the timber dries before the interior surface. So, stress is developed due to the difference in shrinkage. In a perfect seasoning process, stress is kept minimum by controlling the shrinkage. Some of the defects resulting from defective seasoning are as follows:-
Bow: Curvature formed in direction of the length of the timber is called bow.
Cup: Curvature formed in the transverse direction of the timber is called a cup.
Check: Check is a kind of crack that separates fibers, but it doesn’t extend from one end to another.
Split: Split is a special type of check that extends from one end to another.
Honey Combing: Stress is developed in the heartwood during the drying process or seasoning. For these stresses, cracks are created in the form of honeycomb texture.