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European Journal of Wood and Wood Products

, Volume 71, Issue 4, pp 529–532 | Cite as

Proposal for visual grading criteria of structural timber of sweet chestnut from Spain

  • Abel Vega
  • Francisco Arriaga
  • Manuel Guaita
  • Vanessa BañoEmail author
Brief Originals Kurzoriginalia

Abstract

Bending strength, modulus of elasticity and density were obtained for 981 specimens of Spanish Sweet Chestnut (Castanea sativa Mill.) sawn timber from five provenances. Four-point bending tests were made with three sizes (40 × 100 × 2,500, 40 × 150 × 3,500 and 70 × 150 × 3,500 mm) according to EN 408 (CEN EN 408:2011). Visual grading criteria were established, resulting in 82 % of the samples being classified as one structural quality, namely MEF. Characteristic values of the density and the mechanical properties were determined according to EN 384 (CEN EN 384:2010a): E 0,mean  = 12.3 kN mm−2; f m,k  = 28 N mm−2 and ρ k  = 510 kg m−3. Therefore, a strength class D24 was assigned according to EN 338 (CEN EN 338:2010b). The relationship between the modulus of elasticity and bending strength was lower (R2 = 0.26) than for Spanish coniferous species.

Keywords

Timber Eucalyptus Strength Class Structural Timber Visual Grade 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Vorschlag für die visuelle Sortierung von Bauholz aus spanischer Edelkastanie

Notes

Acknowledgments

The authors would like to thank the Ministry of Science and Innovation of Spain (MICIN) and the Plan for Science, Technology and Innovation of the Principality of Asturias (PCTI) for supporting this research through the research project “Forest and industrial valorization of Spanish chestnut” (VALOCAS) and its funding through the Singular Strategic Projects (MICIN) and Complementary Support for Singular Strategic Projects carried out in Asturias (PCTI).

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Abel Vega
    • 1
  • Francisco Arriaga
    • 2
  • Manuel Guaita
    • 3
  • Vanessa Baño
    • 1
    Email author
  1. 1.Forest and Wood Technology Research Centre (CETEMAS)GradoSpain
  2. 2.Escuela Técnica Superior de Ingenieros de MontesTechnical University of MadridMadridSpain
  3. 3.Department of Agroforestry Engineering EPSUniversity of Santiago de CompostelaLugoSpain

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