Research Output
The Use of Torsion Test Method to Evaluate the Shear Properties of Timber Joists
  This paper presents details of the experimental method and test results from a series of torsion tests undertaken to evaluate the shear modulus and shear strength of solid timber joist. The variation of shear modulus within and between test samples, failure modes and the correlation of shear strength and shear modulus were studied. Test results obtained indicate that there was considerable (approximately 33%) variation in shear modulus between pieces of timber tested. It was also found that the shear strength of tested joists was higher than the published values in EN 338. The test joists fractured mostly at the middle with cracks propagated towards either supports or edges. A good correlation was found between shear strength and the shear modulus. The recent revision of the testing standard EN408 includes the torsion testing approach to obtain the shear modulus of timber. It is proposed that a torsion test also be adopted as a method for evaluating the shear strength of timber

  • Date:

    30 August 2012

  • Publication Status:


  • Library of Congress:

    TA Engineering (General). Civil engineering (General)

  • Dewey Decimal Classification:

    624 Civil engineering

  • Funders:

    Abertay University


Khokhar, A., & Zhang, J. (2012). The Use of Torsion Test Method to Evaluate the Shear Properties of Timber Joists. In P. Quenneville (Ed.), Proceedings of the World Conference on Timber Engineering (WCTE 2012)



Torsion test, shear strength, shear modulus, design values, failure mechanism,

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