- NOTE
- Published:
Effect of moisture content of members on mechanical properties of timber joints
Journal of Wood Science volume 51, pages 282–285 (2005)
Abstract
To investigate the effect of moisture content (MC) of members on the mechanical properties of timber joints, bending tests of precut joints and shear tests of dowel-type joints were carried out using timbers of Japanese cedar (Cryptomeria japonica D. Don) with three moisture conditions: green, kiln-dried with a MC target of 15%, and over-kiln-dried with a MC target of 5%. For the bending test, timbers were processed with a precut processing machine into “koshikake-ari” (a kind of dovetail joint) and “koshikake-kama” (a kind of mortise and tenon joint). A pair of members was jointed together without mechanical fasteners. Bolts (diameter = 12 mm) and nails (diameter = 2.45 mm) were used as dowels in the shear test. Bolted joints were constructed with one bolt and two metal side plates. Two nails and two metal side plates were used for the nailed joint. For precut joints, no clear effect of MC was recognized on maximum moment and initial stiffness. The maximum strength of mechanical joints assembled with kiln-dried wood was changed by the degree of drying. Stiffness of the joints assembled with kiln-dried specimens was larger than that of the joints assembled with green specimens.
Author information
Authors and Affiliations
Corresponding author
Additional information
Part of this study was presented at the 7th International IUFRO Wood Drying Conference, Tsukuba, July 2001
Rights and permissions
About this article
Cite this article
Harada, M., Hayashi, Y., Hayashi, T. et al. Effect of moisture content of members on mechanical properties of timber joints. J Wood Sci 51, 282–285 (2005). https://doi.org/10.1007/s10086-004-0656-9
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/s10086-004-0656-9