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Fire resistance of timber doors - Part 1: Test procedure and classification

100%

Izydorczyk D., Sedlak B., Sulik P.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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tom 86

2

Effectiveness of scots pine longwood timber cut-to-length (CTL) logging

100%

Porter B.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2012

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tom 11

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nr 3

In the last two decades the amount of timber harvested in Poland has almost doubled. On the other hand, in some regions of the country a decrease in the number of people willing to work in the forest can be observed. In such a situation, multioperational machines like harvesters and forwarders are being more frequently used in skidding and logging process. These machines operate mainly in the short-wood system, in which large- and medium-sized timber is bucked out of the butt part of the stem in form of logs, while in four of sections in the top part. Buyers are reluctant to buy cut-to-length (CTL) timber because of the widespread belief that timber produced as logs has a greater volume in comparison with longwood one. This paper presents preliminary results of research on CTL logging of large-sized pine longwood timber. Volume and value of timber provided in form of longwoods and logs were compared. The study was conducted in The “Lasy Mazurskie” Forest Promotional Complex (N Poland). The analysis showed that volume of CTL timber is usually smaller compared with the longwood one by a few percent, while the value is larger by several percent.

3

Timber grading within the European Union - Irish and Polish example

100%

Sikora K. S., Krzosek S.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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tom 86

4

Fire resistance of timber glazed partitions

86%

Sedlak B., Izydorczyk D., Sulik P.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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tom 85

5

The analysis of sawmill logs sorting acuteness at automatic sorting lines

86%

Gotych V., Hruzik G. J., Wieruszewski M.

Intercathedra

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2013

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tom 29

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nr 3

The paper includes the results of measurements of timber logs sorting by a modern, equipped with the newest measurement and steering systems line for automatic pretreatment of timber materials. The examined research was made in one of sawmills of Pomeranian Voivodeship.

6

Timber cross-cutting accuracy obtained with an automatic saw

86%

Nieciag S., Palubicki B., Wilkowski J., Rogozinski T.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2019

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tom 107

7

Comparative analysis of the calorific value of giant fir timber (Abies grandis Lindl.) from various stands in southern Poland

86%

Wasik R., Michalec K.

Acta Scientiarum Polonorum. Silvarum Colendarum Ratio et Industria Lignaria

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2012

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tom 11

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nr 3

The paper presents a comparative analysis of wood calorific value of grand fir (Abies grandis Lindl.), originating from four stands of the southern Poland. The research material were the samples, collected from the trunks of 30 trees in each stand. The samples were divided into sections, each containing five annual increments. Then each section was measured: annual ring width and the relative wood density, which was converted to dry wood density, taking the total volumetric shrinkage of 11%. It was assumed that the calorific value of 1 kg dry wood of grand fir is 20.15 MJ. On the basis on the analysis it was found that the average calorific value of 1 m3 of grand fir wood was 8021 MJ. It was shown, that a significantly higher calorific value was obtained by the combustion of 1 m3 wood of giant fir trees, growing on the poorer soil in comparison to the more fertile soils. Statistical analysis also showed that with increasing age of the trees the calorific value of 1 m3 grand fir wood increases significantly.

8

Timber sale systems - Polish and Irish example

86%

Sikora K., Krzostek S.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2015

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tom 90

9

Impact of saw chain cutters type on cutting efficiency and fuel consumption in timber cutting

86%

Maciak A., Kubaska M., Mlodzinska E.

Annals of Warsaw University of Life Sciences - SGGW. Agriculture

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2017

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nr 69

10

Influence of pine wood sawing technology on material efficiency indicators

86%

Wieruszewski M., Muszynski M., Trocinski A., Mirski R.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2023

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tom 122

11

Sources of raw wood for wood-working industry of Slovakia

72%

Stipalova L., Drabek J.

Intercathedra

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2010

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tom 26

In this work we deal with questions of raw wood sources for wood-working industry of Slovakia. The tasks were found and evaluated development of resources and possibilities of utilization in regions of Slovakia. For this purposes there were use data of forest economy of Slovakia in 2009 (green report), a data from summary information of forest condition in Slovakia and prognosis of their resources and utilization. On basis results we suggest more intensive utilization of domestic raw wood.

12

Size and localisation of knots in timber from mountain spruce stands in the Dolomites

72%

Barszcz A., Sandak A., Sandak J.

Folia Forestalia Polonica. Series A . Forestry

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2010

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tom 52

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nr 1

The aim of the study was evaluation of knots in wood of 150-year-old Norway spruce [Picea abies (L.) Karst.] in stands situated at the altitude of 1450– 1740 m above sea level in the Dolomites in Italian section of the Alps. In selected stands, spruce trees were cut down and their length, stem thickness, height to the crown base and stem diameters at every 1 m along the length of merchantable bole were measured. The diameter of knots was measured and they were classified according to their healthiness and the degree of their tightness with the surrounding wood. The relative knot diameters were calculated and the relative height of their location on stem was determined. In total on sample trees there were analysed 1070 knots, of which sound knots (close to 75%) and tight (more than 60%) prevailed. Sound and tight knots had largest diameters, relative diameters and relative heights of location on merchantable boles. The smallest diameters and relative diameters were indicated by rotten and not tight knots that were located at the lowest merchantable bole parts.

13

Country park timber vegetation in agricultural landscape of background forest areas in West Masurian District

72%

Sikorski P., Wysocki C.

Annals of Warsaw Agricultural University. Horticulture (Landscape Architecture)

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2003

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tom 24

14

Valuation of pine logs into flitch elements processing

72%

Janiszkiewicz J., Szczawinski M., Biernacka J.

Intercathedra

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2011

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tom 27

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nr 2

The valuation of the pine logs into flitch elements processing was made on the basis of the method of calculation established by Szczawiński [Szczawiński, 2005]. This paper serves as an example of a practical implementation of a method of the valuation which was used in the timber factory PPD POLTAREX Sawmill in Nowa Wieś and which is based on the actual figures obtained in a test sawmill process conducted on 16 November 2010. The test results prove the usefulness of the proposed method of valuation. It turns out that the highest profitability rate is achieved by using proper method of woodworking of the lower quality of timber.

15

Fire resistance of timber doors - Part II: Technical solutions and test results

72%

Izydorczyk D., Sedlak B., Sulik P.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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tom 86

16

Impact of the type and shape of the CFRP composite reinforcement on the improvement of strength parameters of wood combined elements

72%

Makowski A.

Electronic Journal of Polish Agricultural Universities. Series Wood Technology

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2006

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tom 09

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nr 4

17

Operation time consumption of high-powered harvester in salvage felling

72%

Dvorak J.

Electronic Journal of Polish Agricultural Universities. Series: Forestry

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2010

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tom 13

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nr 4

18

Local reinforcement of naturally defected structural lumber

72%

Burawska I., Jachowicz P., Zbiec M., Grzeskiewicz M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

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2014

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tom 87

19

Value of merchantable timber in Scots pine stands of different densities

72%

Bembenek M., Karaszewski Z., Kondracki K., Lacka A., Mederski P. S., Skorupski M., Strzelinski P., Sulkowski S., Wegiel A.

Drewno. Prace Naukowe. Doniesienia. Komunikaty

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2014

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tom 57

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nr 192

Differences in the intensity of silvicultural treatments, as well as natural tree mort-ality, insect damage and fungal disease can eventually lead to variable stand density even on sites of the same quality. In addition, the bigger the initial stand density,the smaller the crown and trunk volume of single trees. The objective of theresearch was a detailed analysis of the impact of stand density on the total stand volume and value of merchantable timber. The area studied was in Drawno ForestDistrict, north-west Poland, on sites with sandy soil conditions typical for Scots pine (Pinus sylvestris L.). The total volume of merchantable roundwood wasmeasured on 20 sample plots (each covering an area of 0.5 ha) of which 19 were in 82-year-old stands and one in an 87-year-old stand. The stands were divided into three stand density groups (SDG), where the average number of trees growing per group was as follows: 547 (SDG I), 651 (SDG II) and 765 (SDG III). The volume ofa single tree was calculated using diameter (DBH) and height measurement. A qualityclassification of all 6432 tree stems was carried out in accordance with the Polish Standard. Statistical analysis did not indicate that density influenced the total timber volume of the stands studied, which was recorded as an average of 323 m3∙ha-1. However,statistically significant differences in the value of merchantable timber were observed:the highest value of 100 m3 of merchantable timber was recorded in SDG I (€ 5118.87), 6 and 12% higher than in SDGs II and III (€ 4842.09 and € 4565.80, respectively).The results obtained suggest that in the final phase (the last two age classes), pine stands growing in Polish conditions should be maintained at a lower stand density.

20

Flows in the processing of beech wood into semi-finished elements were determined

72%

Wieruszewski M., Gotych V., Hruzik G. J.

Intercathedra

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2010

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tom 26

Wood as a raw material is becoming scarce which makes it necessary to take action to improve economy and efficiency of wood processing. One of the major species of deciduous beech is a wide range of industrial applications. Taking into account the characteristics and qualities of raw beech decided to carry out research to identify indicators to optimize processing of the material in real conditions. Analysis of the processing timber beech into semi-finished elements of the furniture for the implementation of simple, curvilinear elements of the furniture may give base to the rationalization of technology in industrial applications.

Ograniczanie wyników

Fire resistance of timber doors - Part 1: Test procedure and classification

Effectiveness of scots pine longwood timber cut-to-length (CTL) logging

Timber grading within the European Union - Irish and Polish example

Fire resistance of timber glazed partitions

The analysis of sawmill logs sorting acuteness at automatic sorting lines

Timber cross-cutting accuracy obtained with an automatic saw

Comparative analysis of the calorific value of giant fir timber (Abies grandis Lindl.) from various stands in southern Poland

Timber sale systems - Polish and Irish example

Impact of saw chain cutters type on cutting efficiency and fuel consumption in timber cutting

Influence of pine wood sawing technology on material efficiency indicators

Sources of raw wood for wood-working industry of Slovakia

Size and localisation of knots in timber from mountain spruce stands in the Dolomites

Country park timber vegetation in agricultural landscape of background forest areas in West Masurian District

Valuation of pine logs into flitch elements processing

Fire resistance of timber doors - Part II: Technical solutions and test results

Impact of the type and shape of the CFRP composite reinforcement on the improvement of strength parameters of wood combined elements

Operation time consumption of high-powered harvester in salvage felling

Local reinforcement of naturally defected structural lumber

Value of merchantable timber in Scots pine stands of different densities

Flows in the processing of beech wood into semi-finished elements were determined