Grading of sawn timber according to DIN 4074-1

Focus course of the WKI | AKADEMIE®

The photo shows four pieces of spruce timber stacked on top of each other: three pieces of squared timber with a cross-section of about 10 x 10 cm and one piece of beam with a cross-section of about 10 x 20 cm.
© Fraunhofer WKI
Deep cracks, tree edge, large knot and high degree of rot: this spruce timber does not meet the quality standard according to DIN 4074-1.

In Germany, the demand for wood for structural purposes is increasing. In order to ensure that the wood can be used for load-bearing purposes, visual grading of the dried timber according to DIN 4074-1 is necessary. This requires trained persons in a company. Our compact course imparts the essential theoretical and practical basics for the visual grading of sawn timber and is officially recognized by the accredited bodies in Germany. The theoretical and practical contents are closely coordinated. The practical exercises take place in the laboratories of the Fraunhofer WKI. 

Training content

  • Wood physics and special characteristics of wood
  • Legal situation for visually graded sawn timber
  • Wood drying
  • Grading (theory and practice)

Target group Technical managers and specialists
Sectors Timber industry, especially stationary and mobile sawmills

Fraunhofer Institute for Wood Research
- Wilhelm-Klauditz-Institut WKI -
Bienroder Weg 54 E
38108 Braunschweig


If required, the seminar can alternatively be conducted online. The practical content will then be explained using examples. 

Duration 1 day

Certificate of participation


The Testing, Monitoring and Certification Body (TMC) of the Fraunhofer WKI recognizes this training as part of its external monitoring and certification for products according to DIN EN 14081. In addition, this training is recognized in the focus course “Bonding in Wood Construction” of the Fraunhofer WKI.

Language German
Training fee

€ 500 per person (excl. VAT)

Included are lunch and drinks as well as course materials.

Current course dates



The course description can be downloaded here (in German language).


Will follow shortly.


If you would like to participate, please send us an email.

Other courses

The WKI | AKADEMIE® offers various courses on standard topics in the wood-based materials industry as well as on-demand training on specific issues.