Impact of Thermal Modification of Spruce Wood on Screw Direct Withdrawal Load Resistance
This paper reports on the dependence of screw direct withdrawal load resistance on thermal modification of spruce wood. Screw direct withdrawal load resistance was measured in native and thermally modified spruce wood. The thermal modification was performed at three different temperatures: 140, 180,...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
North Carolina State University
2015-01-01
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| Series: | BioResources |
| Subjects: | |
| Online Access: | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_1_1790_Gasparik_Thermal_Modification_Spruce_Wood |
| _version_ | 1818330938430455808 |
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| author | Miroslav Gašparík Štefan Barcík Vlastimil Borůvka Tomáš Holeček |
| author_facet | Miroslav Gašparík Štefan Barcík Vlastimil Borůvka Tomáš Holeček |
| author_sort | Miroslav Gašparík |
| collection | DOAJ |
| description | This paper reports on the dependence of screw direct withdrawal load resistance on thermal modification of spruce wood. Screw direct withdrawal load resistance was measured in native and thermally modified spruce wood. The thermal modification was performed at three different temperatures: 140, 180, and 220 °C. Tests were carried out using two types of screws in three anatomical directions. The effect of the thermal modification was unambiguous: the screw direct withdrawal load resistance decreased with increasing modification temperatures. The largest decline 44.2% was found in the axial direction and at a temperature of 200 °C, while the lowest decrease 4.1% was found in radial direction and at temperature 140 °C for conventional screws without pre-drilling. The highest values were identified in the radial direction, and the lowest in the axial direction. While conventional screws without pre-drilled holes may be regarded as the most suitable, the self-drilling screws achieved the lowest values. |
| first_indexed | 2024-12-13T13:11:54Z |
| format | Article |
| id | doaj.art-9e777aa4f4794afba64aba0ebe5c3cdb |
| institution | Directory Open Access Journal |
| issn | 1930-2126 1930-2126 |
| language | English |
| last_indexed | 2024-12-13T13:11:54Z |
| publishDate | 2015-01-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-9e777aa4f4794afba64aba0ebe5c3cdb2022-12-21T23:44:40ZengNorth Carolina State UniversityBioResources1930-21261930-21262015-01-011011790180210.15376/biores.10.1.1790-1802Impact of Thermal Modification of Spruce Wood on Screw Direct Withdrawal Load ResistanceMiroslav Gašparík0Štefan Barcík1Vlastimil Borůvka2Tomáš Holeček3Czech University of Life Sciences Prague Faculty of Forestry and Wood Sciences; Czech RepublicCzech University of Life Sciences Prague Faculty of Forestry and Wood Sciences; Czech RepublicCzech University of Life Sciences Prague Faculty of Forestry and Wood Sciences; Czech RepublicCzech University of Life Sciences Prague Faculty of Forestry and Wood Sciences; Czech RepublicThis paper reports on the dependence of screw direct withdrawal load resistance on thermal modification of spruce wood. Screw direct withdrawal load resistance was measured in native and thermally modified spruce wood. The thermal modification was performed at three different temperatures: 140, 180, and 220 °C. Tests were carried out using two types of screws in three anatomical directions. The effect of the thermal modification was unambiguous: the screw direct withdrawal load resistance decreased with increasing modification temperatures. The largest decline 44.2% was found in the axial direction and at a temperature of 200 °C, while the lowest decrease 4.1% was found in radial direction and at temperature 140 °C for conventional screws without pre-drilling. The highest values were identified in the radial direction, and the lowest in the axial direction. While conventional screws without pre-drilled holes may be regarded as the most suitable, the self-drilling screws achieved the lowest values.http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_1_1790_Gasparik_Thermal_Modification_Spruce_WoodAnatomical directionSpruce woodScrewDirect withdrawal load resistanceThermal modificationTemperature |
| spellingShingle | Miroslav Gašparík Štefan Barcík Vlastimil Borůvka Tomáš Holeček Impact of Thermal Modification of Spruce Wood on Screw Direct Withdrawal Load Resistance BioResources Anatomical direction Spruce wood Screw Direct withdrawal load resistance Thermal modification Temperature |
| title | Impact of Thermal Modification of Spruce Wood on Screw Direct Withdrawal Load Resistance |
| title_full | Impact of Thermal Modification of Spruce Wood on Screw Direct Withdrawal Load Resistance |
| title_fullStr | Impact of Thermal Modification of Spruce Wood on Screw Direct Withdrawal Load Resistance |
| title_full_unstemmed | Impact of Thermal Modification of Spruce Wood on Screw Direct Withdrawal Load Resistance |
| title_short | Impact of Thermal Modification of Spruce Wood on Screw Direct Withdrawal Load Resistance |
| title_sort | impact of thermal modification of spruce wood on screw direct withdrawal load resistance |
| topic | Anatomical direction Spruce wood Screw Direct withdrawal load resistance Thermal modification Temperature |
| url | http://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_10_1_1790_Gasparik_Thermal_Modification_Spruce_Wood |
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