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Wood

Common Wood Flaws in Lumber

Description

Lumber defects are flaws in wood that can change both its appearance and its strength. These defects come from tree growth and from the way lumber is processed. Knowing the main defects helps explain why some boards are better for construction and manufacturing than others.

Some defects begin in ...

Transcript

木材中的生长缺陷包括节子(树枝与树干连接处形成的结构)、节孔(由松动的节子脱落形成)、腐朽以及虫害损伤。

裂纹是沿年轮或横跨年轮延伸的细小裂缝,属于常见的木材缺陷。

瓦讷(Wane)指木板边缘缺少木材或带有树皮的现象。

裂纹是指原木中产生的径向开裂,是由于干燥过程中发生周向收缩而导致的制造缺陷。

翘曲是指板材表面偏离平整或准确平面的任何变形。木材中的翘曲类型包括弯曲、拱弯、扭曲和瓦形弯曲。

蜂窝状裂纹是指由于不当的干燥处理而在板材内部产生的裂纹。

撕裂纹是由于切割或刨削导致木材从板面被切削或挖出而形成的缺陷。这些缺陷会影响木材的强度。

木材被加工成板材后,表面可能会出现变色。这些褐色、绿色...