Allowable Bending Properties of Machine-Graded Korean Yellow Poplar Lumber
This study was conducted to investigate the feasibility of using yellow poplar as a structural member by determining allowable bending properties. Full-size lumber was classified by machine grading and the knot diameter ratio on the wide surface of lumber. The majority of machine grades of yellow po...
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| Format: | Article |
| Language: | English |
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North Carolina State University
2024-03-01
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| Series: | BioResources |
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| Online Access: | https://ojs.cnr.ncsu.edu/index.php/BRJ/article/view/23295 |
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| author | Da-Bin Song Kug-Bo Shim Sang-Joon Lee Keon-Ho Kim Chul-Ki Kim |
| author_facet | Da-Bin Song Kug-Bo Shim Sang-Joon Lee Keon-Ho Kim Chul-Ki Kim |
| author_sort | Da-Bin Song |
| collection | DOAJ |
| description | This study was conducted to investigate the feasibility of using yellow poplar as a structural member by determining allowable bending properties. Full-size lumber was classified by machine grading and the knot diameter ratio on the wide surface of lumber. The majority of machine grades of yellow poplar lumber with a cross-section of 38 × 89 mm2 were E8, E9, and E10. It was confirmed that the size of the knot diameter ratio tended to be smaller for higher machine grades. In the lowest grade, E8, of most machine grades, the allowable bending strength was lower than the corresponding design value in Korean standards. Application of 0.5 knot diameter ratio to the E8 grade lumber increased the bending strength to 3 MPa of the allowable value to suit the design value. All the allowable modulus of elasticities values of the majority of machine grades were higher than the design values. From the results of this study, it was expected that Korean yellow poplar could be utilized for structural bending members. |
| first_indexed | 2024-04-24T13:55:18Z |
| format | Article |
| id | doaj.art-f89292f01c914155850b97088cea2a98 |
| institution | Directory Open Access Journal |
| issn | 1930-2126 |
| language | English |
| last_indexed | 2024-04-24T13:55:18Z |
| publishDate | 2024-03-01 |
| publisher | North Carolina State University |
| record_format | Article |
| series | BioResources |
| spelling | doaj.art-f89292f01c914155850b97088cea2a982024-04-03T18:58:07ZengNorth Carolina State UniversityBioResources1930-21262024-03-01192278227951432Allowable Bending Properties of Machine-Graded Korean Yellow Poplar LumberDa-Bin Song0Kug-Bo Shim1Sang-Joon Lee2Keon-Ho Kim3Chul-Ki Kim4Wood Engineering Division, Forest Products and Industry Department, National Institute of Forest ScienceDepartment of Wood & Paper Science, College of Agriculture, Life & Environment Science, Chungbuk National UniversityWood Engineering Division, Forest Products and Industry Department, National Institute of Forest ScienceWood Industry Division, Forest Products and Industry Department, National Institute of Forest ScienceWood Engineering Division, Forest Products and Industry Department, National Institute of Forest ScienceThis study was conducted to investigate the feasibility of using yellow poplar as a structural member by determining allowable bending properties. Full-size lumber was classified by machine grading and the knot diameter ratio on the wide surface of lumber. The majority of machine grades of yellow poplar lumber with a cross-section of 38 × 89 mm2 were E8, E9, and E10. It was confirmed that the size of the knot diameter ratio tended to be smaller for higher machine grades. In the lowest grade, E8, of most machine grades, the allowable bending strength was lower than the corresponding design value in Korean standards. Application of 0.5 knot diameter ratio to the E8 grade lumber increased the bending strength to 3 MPa of the allowable value to suit the design value. All the allowable modulus of elasticities values of the majority of machine grades were higher than the design values. From the results of this study, it was expected that Korean yellow poplar could be utilized for structural bending members.https://ojs.cnr.ncsu.edu/index.php/BRJ/article/view/23295yellow poplarbending allowable propertiesstructural materialknotmachine grading |
| spellingShingle | Da-Bin Song Kug-Bo Shim Sang-Joon Lee Keon-Ho Kim Chul-Ki Kim Allowable Bending Properties of Machine-Graded Korean Yellow Poplar Lumber BioResources yellow poplar bending allowable properties structural material knot machine grading |
| title | Allowable Bending Properties of Machine-Graded Korean Yellow Poplar Lumber |
| title_full | Allowable Bending Properties of Machine-Graded Korean Yellow Poplar Lumber |
| title_fullStr | Allowable Bending Properties of Machine-Graded Korean Yellow Poplar Lumber |
| title_full_unstemmed | Allowable Bending Properties of Machine-Graded Korean Yellow Poplar Lumber |
| title_short | Allowable Bending Properties of Machine-Graded Korean Yellow Poplar Lumber |
| title_sort | allowable bending properties of machine graded korean yellow poplar lumber |
| topic | yellow poplar bending allowable properties structural material knot machine grading |
| url | https://ojs.cnr.ncsu.edu/index.php/BRJ/article/view/23295 |
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