Journal of the Korea Furniture Society (한국가구학회지)
- Volume 22 Issue 1
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- Pages.18-25
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- 2011
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- 1226-3109(pISSN)
The Nail Jointing Properties and Checking Mechanism of Thinned Japanese Cedar (Cryptomeria japonica D. Don.) Boards Grown in Southern District
남부지역 삼나무 간벌목재의 못접합특성과 할렬발생
- So, Won-Tek (Institute of Agriculture Science and Technology, (Dept. of Forest Products and Technology) Chonnam National University)
- 소원택 (전남대학교 농업과학기술연구소(임산공학과))
- Received : 2010.10.05
- Accepted : 2011.01.13
- Published : 2011.01.25
Abstract
This experiment was carried out to investigate the effects of nail diameter, driving distance from end on the nail check length, and the effects of nail diameter, prehole for nail driving, and nail driving slope on the nail withdrawal resistance, by the static test of universal testing machine. The test specimen were Japanese cedar (Cryptomeria japonica D. Don.) boards grown in southern district of Korea, and the nails for test were 2.02~4.82 mm in diameter. After nail driving, the back face checks of test boards were longer than the surface checks. The optimum nail diameter without checks or loss of nail withdrawal resistance were below 10% of board width and the optimum driving distance from end of boards were ten multiple of nail diameter. The relation between nail diameter (x) and withdrawal resistance (y) was linear and the regression formulae for Japanese cedar board was y = 8.66x + 7.6 (
Keywords
- Japanese cedar;
- nail checking mechanism;
- nail withdrawal resistance;
- prehole for nail driving;
- nail jointing properties;
- nail driving slope