Bending properties of dimension lumber produced from Siberian larch (Larix sibirica) in Mongolia

Journal of Wood Science

Haruna Aiso-Sanada¹  Bayasaa Tumenjargal²  Ikumi Nezu²  Yusuke Takahashi²  Shinso Yokota²  Futoshi Ishiguri²  Jyunichi Ohshima²  Ganbaatar Chultem³  Bayartsetseg Baasan³ 

[1] Forestry and Forest Products Research Institute;School of Agriculture, Utsunomiya University;Training and Research Institute of Forestry and Wood Industry, Mongolian University of Science and Technology;

关键词: Larix sibirica;    Modulus of elasticity;    Modulus of rupture;    5% tolerance limit;    Visual grading;    Juvenile wood;   

DOI  :  10.1186/s10086-020-01863-6

来源: DOAJ

【 摘 要 】

Abstract The modulus of elasticity (MOE) and modulus of rupture (MOR) were evaluated for 190 pieces of dimension lumber (2 by 4 lumber, 38 by 89 mm in cross-section) produced from Larix sibirica trees grown in Mongolia. The 5% tolerance limits of the MOE and MOR were 5.70 GPa and 15.1 MPa, respectively. The value of the 5% tolerance limit of the MOR exceeded the characteristic value of 2 by 4 lumber in visual grading class No. 3 of the Japanese Agricultural Standard for the D. fir-L, Hem-Tam, JS-III and S-P-F softwood species groups. A significant positive correlation was found between the MOE and MOR, although air-dry density was weakly correlated with bending properties in L. sibirica.

【 授权许可】

Unknown