InCIEC 2013 pp 15-26 | Cite as

Strength Assessment of Malaysian Timbers in Structural Size

  • Mohd Jamil Abdul Wahab
  • Mohd Zamin Jumaat
  • Mohamad Omar Mohamad Khaidzir
Conference paper

Abstract

In Malaysian timber engineering practice, mechanical tests on timbers were conducted based on small clear timber specimens. Throughout the world, the practice of structural size timber assessment has been long-established. Stress values obtained from structural size timber are more accurate for allocating value in structural design. Preliminary testing works have been initiated to establish the mechanical properties of Malaysian timbers in structural form. Some commercial timbers were tested using structural size bending method. Results indicated that bending strength of structural size specimen is lower compared to small planks.

Keywords

Bending Modulus Strength Elasticity Tropical 

Notes

Acknowledgments

We are indebted to Che Muhammad Farid and Syarmiza Anuar for assisting in the mechanical testing work. The research was financed by the Institute of Research Management and Monitoring, University of Malaya and currently funded by Ministry of Science, Technology and Innovation Malaysia for the structural size timber assessment in Forest Research Institute Malaysia.

References

  1. 1.
    C. Engku Abdul Rahman, Basic and grade stresses for some Malaysian timbers. Malayan Forester 34, 131–134 (1971)Google Scholar
  2. 2.
    H. Lee Yew, C. Engku Abdul Rahman, P. Chu Yue, The strength properties of some Malaysian timbers. Timber Trade Leaflet No. 34. Forest Department: Kuala Lumpur (1993)Google Scholar
  3. 3.
    MS 544, Code of practice for structural use of timber: Part 2—Permissible stress design of solid timber, Department of Standard Malaysia (First revision) (2001)Google Scholar
  4. 4.
    B. Madsen, H. Andrew Buchanan, Size effects in timber explained by a modified weakest link theory. Can. J Civil Eng. 13(2), 218–232 (1986)CrossRefGoogle Scholar
  5. 5.
    W.L. Galligan, D.W. Green, Structural lumber: an overview of research needs. Am. Soc. Civil Eng 3–27 (1984)Google Scholar
  6. 6.
    L. Bostrom, Determination of the modulus of elasticity in bending of structural timber—comparison of two methods. Eur. J. Wood Wood Prod. 57(2), 145–149 (1999)CrossRefMathSciNetGoogle Scholar
  7. 7.
    R. Geert, J.W. Van de Kuilen, Comparison of methods of strength classification of tropical hardwood timber, in Proceedings of the Eleventh World Conference on Timber Engineering, 20–24 June 2010, Riva Del GardaGoogle Scholar
  8. 8.
    D.S. Gromala, Determination of modulus of rigidity by ASTM D-198 flexural methods. J. Test. Eval. 13(5), 352–355 (1985)CrossRefGoogle Scholar
  9. 9.
    A.V. Thomas, Some notes on timber testing. Malayan Forester 1, 56–59 (1931)Google Scholar

Copyright information

© Springer Science+Business Media Singapore 2014

Authors and Affiliations

  • Mohd Jamil Abdul Wahab
    • 1
  • Mohd Zamin Jumaat
    • 2
  • Mohamad Omar Mohamad Khaidzir
    • 1
  1. 1.Timber Engineering LaboratoryForest Research Institute Malaysia, FRIMKepongMalaysia
  2. 2.Department of Civil EngineeringUniversity of MalayaKuala LumpurMalaysia

Personalised recommendations