Plywood

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A beige log made of meter pieces of beech laminated wood on the forest path
Industrial wood - endured as plywood

In forestry, plywood is the term used to describe raw wood that is not measured by the individual logs, but is sold by cubic meters .

Measurements

A distinction is made between two types of plywood, split logs and other short timber . For this purpose, it is usually cut into lengths of 1 or 2, more rarely 3 to a maximum of 7 meters, and erected in layers in so-called joints. When they are placed, these wood piles are overdimensioned by at least 3%.

The advantage of selling as plywood is that not every log has to be measured individually. This can reduce the timber harvesting costs. As a rule, plywood is an inferior range such as industrial wood or firewood .

In Germany, the statutory grading for raw wood (Forst-HKS) is usually used for sales . According to this, plywood is divided into the following classes according to the diameter with bark at the weaker end:

class Diameter
with bark
S 1 Round pieces 3 to 6 cm
S 2 Round pieces 7 to 13 cm
S 2.1 Round pieces 7 to 9 cm
S 2.2 Round pieces 10 to 13 cm
S 3 Round pieces and split pieces from it 14 cm and more
S 3.1 Round pieces and split pieces from it 14 to 19 cm
S 3.2 Round pieces and split pieces from it 20 cm and more

In the case of plywood without bark, the specified diameters are reduced by 1 cm. The division of classes S 2 and S 3 into sub-classes can be omitted.

Trading according to these guidelines is not mandatory, but serves to standardize the market. For special purposes it can be helpful to deviate from this.

swell

  1. Directive 68/89 / EEC (PDF) of the Council of January 23, 1968 on the approximation of the laws of the member states for the sorting of raw wood.
  2. Commercial grade sorting for raw wood (Forst-HKS) (pdf, wald-online-bw.de).