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Wood Research and Technology

Holzforschung

Cellulose – Hemicelluloses – Lignin – Wood Extractives

Editor-in-Chief: Salmén, Lennart

Editorial Board: Daniel, Geoffrey / Militz, Holger / Rosenau, Thomas / Sixta, Herbert / Vuorinen, Tapani / Argyropoulos, Dimitris S. / Balakshin, Yu / Barnett, J. R. / Burgert, Ingo / Rio, Jose C. / Evans, Robert / Evtuguin, Dmitry V. / Frazier, Charles E. / Fukushima, Kazuhiko / Gindl-Altmutter, Wolfgang / Glasser, W. G. / Holmbom, Bjarne / Isogai, Akira / Kadla, John F. / Koch, Gerald / Lachenal, Dominique / Laine, Christiane / Mansfield, Shawn D. / Morrell, J.J. / Niemz, Peter / Potthast, Antje / Ragauskas, Arthur J. / Ralph, John / Rice, Robert W. / Salin, Jarl-Gunnar / Schmitt, Uwe / Schultz, Tor P. / Sipilä, Jussi / Takano, Toshiyuki / Tamminen, Tarja / Theliander, Hans / Welling, Johannes / Willför, Stefan / Yoshihara, Hiroshi


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1437-434X
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Volume 66, Issue 5

Issues

Grading of structural timber of Populus × euramericana clone I-214

Milagros Casado
  • Departamento de Ingeniería Agrícola y Forestal, ETS Ingenierías Agrarias, Universidad de Valladolid, Campus La Yutera, Palencia, Spain
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Luis Acuña
  • Departamento de Ingeniería Agrícola y Forestal, ETS Ingenierías Agrarias, Universidad de Valladolid, Campus La Yutera, Palencia, Spain
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Luis-Alfonso Basterra
  • Corresponding author
  • Departamento de Construcciones Arquitectónicas, ETS Arquitectura, Universidad de Valladolid, Spain
  • Email
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Gemma Ramón-Cueto
  • Departamento de Construcciones Arquitectónicas, ETS Arquitectura, Universidad de Valladolid, Spain
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Daniel Vecilla
  • Departamento de Ingeniería Agrícola y Forestal, ETS Ingenierías Agrarias, Universidad de Valladolid, Campus La Yutera, Palencia, Spain
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2012-02-01 | DOI: https://doi.org/10.1515/hf-2011-0153

Abstract

Grading tests were performed on 338 poplar wood samples (Populus × euramericana I-214) with dimensions of 150×50 mm2, 150×80 mm2, and 200×100 mm2 prepared for structural utilization. The non-destructive testing methods included ultrasound (Sylvatest) and induced vibrations (Portable Lumber Grader) combined with visual grading criteria. Additionally, screw withdrawal resistance was tested by the instrument Fakopp. These results were compared with those obtained by a four-point bending test according to the EN 408 (2004) standard. Ultrasound and induced vibrations overestimated the quality of this type of wood. Correlation equations are proposed to determine the true characteristics for each testing method. It can be concluded that poplar timber from clone I-214 has acceptable flexural strength, but a comparatively low elastic modulus, whereby it is not graded within a high strength class according to the EN 338 (2009) standard.

Keywords: four-point bending test; induced vibration test; non-destructive testing (NDT); poplar timber; screw withdrawal resistance; structural timber; timber grading; ultrasound test

About the article

Corresponding author. Departamento de Construcciones Arquitectónicas, Universidad de Valladolid, ETS Arquitectura, Avda/Salamanca, s/n, 47014 Valladolid, Spain Phone/Fax: +34 983 423 442


Received: 2011-08-02

Accepted: 2012-01-03

Published Online: 2012-02-01

Published in Print: 2012-07-01


Citation Information: , Volume 66, Issue 5, Pages 633–638, ISSN (Online) 1437-434X, ISSN (Print) 0018-3830, DOI: https://doi.org/10.1515/hf-2011-0153.

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