It will be seen from chapter 3 (section on ‘Grading and Shippers Marks’) and chapter 8 (section 8.2 Albion 1980) that the classification of timber into various qualities and grades is of major importance. In the early days of any timber-producing country the grading of the timber into qualities must have been purely by experience and rule of thumb. In many countries it remains that way, and up to quite recently there have been few basic changes. The most significant of these is stress grading, which is covered in chapter 21.
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