Prediction models of structural timber

• Autorzy: Rohanová A. , Nunez E.
• Języki publikacji: EN

Abstrakty

EN

Prediction models of structural timber. Structural timber quality is specific in the individual countries. Prediction models of various properties are used to ensure compatibility of science knowledge. They are taken into account in model values determination for grading methods based on various principles. Norway spruce structural timber harvested in Slovakia was used to determine bending and acoustic characteristics (MOECB – modulus of elasticity in bending, MOEdyn – dynamic modulus of elasticity, c – velocity of ultrasound, f - frequency) by non destructive methods (bending CB, vibration - Timber Grader, ultrasound - Sylvatest Duo). In addition, destructive bending test (STN EN 408) was applied to identify following parameters: wood density, modulus of elasticity and bending strength. Results are presented in prediction models offering reliable and objective model values of strength for various combinations of indicating properties.

Słowa kluczowe

EN

structural timber; quality; bending strength; modulus of elasticity; prediction model

• Wydawca: Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
• Czasopismo: Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
• Rocznik: 2012
• Tom: No. 79
• Strony: 210--213
• Opis fizyczny: Bibliogr. 8 poz.

Twórcy

autor

Rohanová A.

• Faculty of Wood Sciences and Technology, Technical University in Zvolen

autor

Nunez E.

• Faculty of Wood Sciences and Technology, Technical University in Zvolen

Bibliografia

• 1.MIŠEIKYTE, S.- BALTRUŠAITIS, A. - KUDAKAS, L. (2008): Strength and stiffness properties of the Lithuanian grown Scots pine (Pinus sylvestris): Comparison of various testting methods. Proceeding of the 4th meeting of the NORDIC-BALTIC NETWORK IN WOOD MATERIAL SCIENCE AND ENGINEERING (WSE), PERSE Ltd. Riga Latvia, ISBN 978-9984-39-675-0, pp. 101-107.
• 2.ROHANOVÁ, A. - LAGAŇA, R.- BABIAK, M. (2011): Comparison of non-destructive methods of quality estimation of the construction spruce wood grown in Slovakia. In Proceedings 17th International nondestructive Testing and Evaluation of Wood Symposium. University of West Hungary, faculty of Wood Sciences, Sopron, 2011, ISBN 978-963-9883-82-6, pp. 247-254.
• 3.TOMAŽ, P.- SRPČIČ, J. - PLOS, M. - TURK, G. (2011): Non-destructive tests for strength grading of Slovenian structural sawn timber. In Proceedings 17th International nondestructive Testing and Evaluation of Wood Symposium. University of West Hungary, faculty of Wood Sciences, Sopron, 2011, ISBN 978-963-9883-82-6, pp. 231-238.
• 4.TRIOLA, M. F. 1989: Elementary Statistics. Fourth edition. Benjamin Cummings Publishing Company, Inc., ISBN 0-8053-0271-9, 784 p.
• 5.WEIDENHILLER. A. - DENZLER, J. K.(2009): Optimising machine strength grading with three indicating properties”. In: Proceedings of the Economic and technical aspects of quality control for wood and wood products. Cost Action E53 Conference 22nd – 23rd October 2009, Lisbon, Portugal. Paper #7.
• 6.EN 338. Structural timber. Strength classes. 2009.
• 7.EN 408. Timber structures - Structural timber and glued laminated timber - Determination of some physical and mechanical properties. 2003.
• 8.EN 14 081-4. Timber structures- Strength graded structural timber with rectangular cross section - Part 4: Machine grading - Grading machine settings for machine controlled systems. 2008.