Lastnosti bukovine in njena raba

Čufar, Katarina; Gorišek, Željko; Merela, Maks; Kropivšek, Jože; Bučar, Dominika Gornik; Straže, Aleš

doi:10.26614/les-wood.2017.v66n01a03

Cited by 6 publications

(1 citation statement)

References 9 publications

(13 reference statements)

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“…As a prevailing tree species, beech is regarded as one of the most important species, particularly for the timber industry, but also for the renewable energy sector. This does not only refer to its most common use in the furniture industry (Čufar et al 2017) but also increasingly to its use in added value products such as structural and decorative veneer, new products of chemical processing (Kropivšek and Gornik Bučar 2017), and new fields of use, e.g. innovative light structural composite elements such as I-beams (Gornik and tube beams.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the Quality and Quantity of Beechwood from Tree to Sawmill Product

Marenče

Šega

Bučar

2019

Croat. j. for. eng. (Online)

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The analysis evaluates the potential and methods of the respective assessment of beech trees, beech logs and sawn timber. The objective of the study was to assess the impact of the quality of the incoming raw material (tree) on the quality and quantity of products – obtained at the sawmill. The study presents a model that indicates the relations between the assessment of the quality of a standing beech tree and the quality of the sawmill products obtained from its wood. In addition, relations between individual quality classes of sawlogs, pulpwood, energy wood and sawn timber are shown. Standing trees were assessed in three sites according to the national 5-grade quality scale, assortments produced from selected trees pursuant to the EN 1316-1 standard, and sawn timber produced from assortments according to the rules of the European Organisation of the Sawmill Industry (EOS). In total, 87.04 m3 of timber was harvested. In higher quality trees (quality 1 and 2), the shares of sawlogs were between 53% and 72% of gross tree volume, but in the poorest quality trees, the shares were only between 23% and 36%. What remained was pulp and energy wood. In trees of excellent quality (quality 1), sawlogs of the highest quality prevailed (A and B quality grade), while sawlogs of C and B quality prevailed in trees of lower quality. Covered knots and heart defects were typically the decisive criteria for classifying sawlogs quality in all three sites. A total of 30,786 m3 of unedged timber was sawn from the sawlogs, which comprised 35% of the total gross quantity of trees on average. Nine percent of the sawn timber was classified into the A–EOS class (top quality), 27% into the B–EOS class and 47% into the C–EOS class. Seventeen percent of the timber was only suitable for post-processing. The crucial criteria for classifying sawn timber were as follows: dead and rotten knots, heart, curvature and cracks. Above-average sawlogs (A and B quality grade) was mainly obtained from trees of better quality. Relations between the quality of trees, sawlogs and sawn timber indicated the suitability of classifying standing trees and sawlogs, since it was possible to produce sawn timber of higher quality from quality trees or logs. The model presents a rare attempt to establish and monitor quality and quantity from standing tree to end product.

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Section: Introductionmentioning

confidence: 99%

Monitoring the Quality and Quantity of Beechwood from Tree to Sawmill Product

Marenče

Šega

Bučar

2019

Croat. j. for. eng. (Online)

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Spatial and temporal variation of Fagus sylvatica growth in marginal areas under progressive climate change

Dolar,

Castillo,

Serrano-Notivoli

et al. 2023

Dendrochronologia

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Comparison of mechanical properties of recent and 400-year-old European larch wood

Zupanc¹,

Fajdiga²,

Humar³

2021

les-wood

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Wood is considered the leading building material throughout the history of mankind. Wood has several advantages over other construction materials, which also makes it one of the most promising materials of the future. The environmental aspect also plays a major role today, as wood is a natural, renewable resource whose processing is very energy-intensive. Due to its repeated and widespread use in construction, the prediction of mechanical properties and their change over time is also very well known, as the overall safety of all buildings also depends on it. Therefore, we compared the mechanical properties of fresh European larch (Larix decidua) and 400-year-old larch found in the Ruard manor house on the Stara Sava in Jesenice, where the renovation of Upper Sava Museum is currently underway. In order to predict what will happen to the wood in the long term, it is necessary to expose the wood to the same conditions, i.e. to change it with dynamic loads or material fatigue. The effect of aging on flexural strength has not been confirmed. Fatigue results show that old wood withstood about 18 times fewer load cycles than recent larch wood.

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Lastnosti bukovine in njena raba

Cited by 6 publications

References 9 publications

Monitoring the Quality and Quantity of Beechwood from Tree to Sawmill Product

Monitoring the Quality and Quantity of Beechwood from Tree to Sawmill Product

Spatial and temporal variation of Fagus sylvatica growth in marginal areas under progressive climate change

Comparison of mechanical properties of recent and 400-year-old European larch wood

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