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Strength grading of sawn timber in Europe
Lumber grading · Intermediate
How European sawmills sort structural timber into strength classes: standards (EN 14081, EN 338, EN 1912), visual and machine grading, the wood science behind them, worked calculations, and the limits of the evidence.
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- 1. Why timber is graded: indicating properties and characteristic values 9 min
- 2. Strength classes: what C14 to C50 mean, and what to check 8 min
- 3. Visual grading: features, national rules and their limits 9 min
- 4. What the wood does: stiffness, knots, grain and moisture 10 min
- 5. Density, growth and juvenile wood: where the variation comes from 9 min
- 6. Machine grading: indicating properties, settings and yields 10 min
- 7. Reference moisture, regional variation, CE marking and limits of this course 9 min
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