The exterior surface of a tree shrinks when it is exposed to atmospheric agencies. Such a shrinkage results in cracks known as wind cracks (Fig. 10.6).
![C10F006.png](https://learning.oreilly.com/api/v2/epubs/urn:orm:book:9789332579118/files/images/Ch10/C10F006.png)
Figure 10.6 Typical wind cracks of timber
The exterior surface of a tree shrinks when it is exposed to atmospheric agencies. Such a shrinkage results in cracks known as wind cracks (Fig. 10.6).
Figure 10.6 Typical wind cracks of timber
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