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Volume 12
Issue 5
10.3390/f12050532
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Article

Mechanical Properties of Machine Stress Graded Sawn Timber Depending on the Log Type

by
Izabela Burawska-Kupniewska
*,
Piotr Mańkowski
and
Sławomir Krzosek
Institute of Wood Sciences and Furniture, Warsaw University of Life Sciences-SGGW, Nowoursynowska 159, 02-776 Warsaw, Poland
*
Author to whom correspondence should be addressed.
Forests 2021, 12(5), 532; https://doi.org/10.3390/f12050532
Submission received: 1 April 2021 / Revised: 20 April 2021 / Accepted: 22 April 2021 / Published: 25 April 2021
(This article belongs to the Special Issue Forest Sustainability: Wood Harvest, Supply and Procurement Chain, and Wood Raw Material Properties)
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Abstract

This article presents the results of tests conducted on Scots pine timber from three different kinds of logs: butt, middle and top. A planed pine timber batch composed of 510 pieces, dried to ca. 12% humidity, was machine-graded using a portable MTG device, and classified into the following classes: C18, C24, C30, C35 and C40 (according to EN 338:2016). During the second stage of the study, the timber was tested to determine its density, MOE and MOR, in accordance with EN 408:2012. We analyzed the impact of the timber’s log of origin on the results of machine strength grading and on the values of correlation coefficients between the tested properties. The results show, among others, that there is a correlation between the C classes and MOR of the tested timber, as well as its origin from butt, middle or top logs.
Keywords: Scots pine; strength grading; non-destructive testing Scots pine; strength grading; non-destructive testing

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MDPI and ACS Style

Burawska-Kupniewska, I.; Mańkowski, P.; Krzosek, S. Mechanical Properties of Machine Stress Graded Sawn Timber Depending on the Log Type. Forests 2021, 12, 532. https://doi.org/10.3390/f12050532

AMA Style

Burawska-Kupniewska I, Mańkowski P, Krzosek S. Mechanical Properties of Machine Stress Graded Sawn Timber Depending on the Log Type. Forests. 2021; 12(5):532. https://doi.org/10.3390/f12050532

Chicago/Turabian Style

Burawska-Kupniewska, Izabela, Piotr Mańkowski, and Sławomir Krzosek. 2021. "Mechanical Properties of Machine Stress Graded Sawn Timber Depending on the Log Type" Forests 12, no. 5: 532. https://doi.org/10.3390/f12050532

APA Style

Burawska-Kupniewska, I., Mańkowski, P., & Krzosek, S. (2021). Mechanical Properties of Machine Stress Graded Sawn Timber Depending on the Log Type. Forests, 12(5), 532. https://doi.org/10.3390/f12050532

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