Towards more accurate grading: non-destructive methods for assessing low-quality sawlogs
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F25%3A43927266" target="_blank" >RIV/62156489:43410/25:43927266 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1515/hf-2025-0039" target="_blank" >https://doi.org/10.1515/hf-2025-0039</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1515/hf-2025-0039" target="_blank" >10.1515/hf-2025-0039</a>
Alternative languages
Result language
angličtina
Original language name
Towards more accurate grading: non-destructive methods for assessing low-quality sawlogs
Original language description
At times of bark beetle infestation, the sawmill industry uses mainly low-quality logs with a high proportion of salvage logging. Some countries of Central Europe, including the Czech Republic, have been greatly affected by such insect attacks as they significantly reduce the quality of sawn timber. To minimise the losses, non-destructive methods are needed to detect infestation early. Thirty Norway spruce sawlogs from loggings affected by bark beetle were processed and visually graded according to EN 1611-1 (CEN (1999) EN 1611-1:1999 - sawn timber - appearance grading of softwoods - part 1: European spruces, firs, pines and douglas firs. Brussels: European Committee for Standardization). The commonest defects were knots, but other defects such as soft rot, deep insect attack, and deep cracks had the most significant effect on quality. These defects were best detected by computed tomography using a MiCROTEC CT log scanner. The frequency-resonance method resulted in poorer coefficients of determination from R2 = 0.004 to R2 = 0.29 when predicting qualitative yield and therefore cannot be recommended when visually grading sawn timber. The Recommended Rules for Measuring and Grading of Roundwood in the Czech Republic 2008 should be adapted to the current situation in the industry by dividing grade III.D into two subclasses.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20502 - Paper and wood
Result continuities
Project
<a href="/en/project/LL1909" target="_blank" >LL1909: Tree Dynamics: Understanding of Mechanical Response to Loading</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Holzforschung
ISSN
0018-3830
e-ISSN
1437-434X
Volume of the periodical
79
Issue of the periodical within the volume
10
Country of publishing house
DE - GERMANY
Number of pages
13
Pages from-to
517-529
UT code for WoS article
001523978000001
EID of the result in the Scopus database
2-s2.0-105010359651