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Defect of wood
Also known as defects,
It can be divided into three main categories:
① Natural defects. Such as knots, twill and due to growth stress or natural damage
Defect of wood
Defect of wood
Flaw. The branch part contained in the trunk or main branch of wood is called the wood section, which can be divided into dead section and living section according to the degree of continuous growth; According to the wood section material can be divided into healthy section and rotten section. The twill of logs is often called twisted grain, and that of sawn timber is called twill.
② The defects of biological harm. There are mainly decay, discoloration and moth-eaten.
(3) Defects caused by drying and machining. Such as dry crack, warping, saw wound, etc. Defects reduce the utility value of wood.
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