Effect of shoulder thickness on bending moment capacity of mortise and loose tenon joint

Document Type : Research Paper

Authors

Abstract

This study was carried out in order to determine the effect of shoulder thickness
(including 1.5, 5, 10, 15 and 18.5 mm), loose tenon length (15, 20, 25, 30, and 35mm),
width of loose tenon (20, 25, 30, 35, and 40mm), and loose tenon wood species
(Beech, walnut, oak, sycamore, poplar, and fir) on bending moment capacity of
mortise and loose tenon joint. Polyvinyl acetate (PVAc) adhesive was utilized in
constructing joint specimens. Totally 100 T-type joints were made and tested in the
same way. The results showed that the difference between the groups was highly
significant in terms of shoulder thickness, loose tenon length, and width of loose
tenon. Shoulder thickness directly affected bending moment capacity of joint. The
highest bending moment capacity was obtained in joints with 1.5mm shoulder
thickness. As loose tenon length and width were increased, the strength of the joint
was correspondingly improved. Test joints with loose tenon made of beech wood gave
higher bending moment capacity than joints with loose tenon constructed with other
wood species.

Keywords

References

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Iranian Journal of Wood and Paper Industries
Volume 4, Issue 1 - Serial Number 1
January 2012
Pages 65-75

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