Journal of Wood Science

, Volume 64, Issue 4, pp 356–363 | Cite as

Development and investigation of a hybrid built-up column made of small diameter logs originating from juvenile trees

  • Guofang Wu
  • Enchun Zhu
  • Yong Zhong
  • Yingchun Gong
  • Haiqing RenEmail author
Original Article


Small diameter logs from juvenile trees are heavily produced during the management of artificial forests around the world. As a kind of plentiful and inexpensive natural resource, the potential was not fully explored. So far the small diameter logs are mainly used as raw materials for products other than building materials. To utilize these small diameter logs originating from juvenile trees as structural members into wood construction, a kind of hybrid built-up column was developed and the performance was investigated experimentally and theoretically. It was found that column had good load-carrying capacity. To apply the developed member in wood construction, the prediction method of the column was proposed. The effective slenderness ratio which took the shear deformations due to the bending of limbs and slip of nail connections between U-shaped nails and limbs into consideration was derived based on mechanics theory. The proposed prediction method was found to have good accuracy in predicting the load-carrying capacity of the hybrid built-up column. This paper can promote the structural application of the small diameter logs originating from juvenile trees.


Load-carrying capacity Juvenile round timber Built-up column Effective slenderness ratio Timber structure 



The authors are grateful for the financial support from Chinese Academy of Forestry Fundamental Research Fund (CAFYBB2017SY036).


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Copyright information

© The Japan Wood Research Society 2018

Authors and Affiliations

  • Guofang Wu
    • 1
  • Enchun Zhu
    • 2
  • Yong Zhong
    • 1
  • Yingchun Gong
    • 1
  • Haiqing Ren
    • 1
    Email author
  1. 1.Research Institute of Wood Industry, Research Institute of Forestry New TechnologyChinese Academy of ForestryBeijingPeople’s Republic of China
  2. 2.School of Civil EngineeringHarbin Institute of TechnologyHarbinPeople’s Republic of China

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