Full text of this article is only available in PDF format.

Paul Walldén (email)

Eräs puun laadun tunnus

Walldén P. (1933). Eräs puun laadun tunnus. Silva Fennica vol. 39 no. 5 article id 7276. https://doi.org/10.14214/aff.7276

English title: Bending strength of birch wood


According to earlier studies, the weight of the wood may be a useful quality when aim is to create such wooden structures where small weight is combined with maximum mechanical strength. Of the northern tree species, Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) H. Karst.) and birch (Betula sp.), birch has the highest bending strength. The main focus of this study was to find out if there is correlation between the specific gravity of cell wall substance and bending strength of the birch wood, and if the specific gravity of cell wall substance could be used as indication of the quality of the wood.

Dominant trees from 55 years old birch (Betula sp.) stand was selected for bending tests. The bending strength did not vary in birch as much as in many other tree species. The highest bending strength was achieved near the specific gravity class s=0,65, and it can be concluded that when the specific gravity falls below S=0,57, the wood’s technical quality is not sufficient. The article includes a literature review on the subject.

The PDF includes a summary in German

Original keywords
koivu; Betula sp.; taivutuslujuus; ominaispaino

English keywords
the specific gravity of cell wall substance

Published in 1933

Views 291

Available at https://doi.org/10.14214/aff.7276 | Download PDF

Creative Commons License

Click this link to register to Silva Fennica.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content

Your selected articles
Your search results
Wallden P., (1934) Studies on relationship between anatomical struc.. Silva Fennica vol. 40 no. 14 article id 7291
Walldén P., (1933) Bending strength of birch wood Silva Fennica vol. 39 no. 5 article id 7276