Journal of Wood Science

, Volume 64, Issue 4, pp 377–389 | Cite as

The evaluation of long-term mechanical properties of wood-based panels by indoor exposure tests

  • Noboru SekinoEmail author
  • Hideaki Korai
Original Article


Wood-based panels such as plywood, oriented strand board, particleboard, and medium-density fiberboard are used for roof, wall and floor sheathing materials in residential construction. However, the service life of these panels is still unknown due to the lack of long-term durability data. In this paper, test results from six different indoor exposure experiments were integrated to investigate the long-term durability of wood-based panels. The indoor exposure tests lasted for a maximum of 10 years, providing the panels with the changes in moisture content that ranged between 5 and 18%. The reduction in mechanical properties was determined to be in the range of 0–16% for the bending strength, 3–22% for the modulus of elasticity, 11–31% for the internal bond strength and 0–8% for the nail-head pull-through strength. No reduction was recognized for the lateral nail resistance. Furthermore, the concept of deterioration intensity (DI) based on the moisture content history was introduced to predict the long-term durability of the panels, and various calculation methods for DI were discussed so as to increase the correlativity of this property with the reduction in a mechanical property.


Indoor exposure Mechanical property Moisture content history Long-term durability Wood-based panel 



The indoor exposure tests presented in this paper were conducted as part of a project organized by the Research Working Group on Wood-based Panels from the Japan Wood Research Society. The authors express their thanks to all participants in this project. This study was supported by a Grant-in-Aid for Scientific Research (21380108) from the Ministry of Education, Culture, Sports, Science and Technology of Japan and by a grant-in-aid from Ematyu-fundation in 2013. The authors are grateful for the grant received.


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Copyright information

© The Japan Wood Research Society 2018

Authors and Affiliations

  1. 1.Faculty of AgricultureIwate UniversityMoriokaJapan
  2. 2.Forestry and Forest Products Research InstituteTsukubaJapan

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