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Within stem variation of Maritime Pine timber mechanichal properties

Variation der mechanischen Eigenschaften im Stammholz von maritimer Kiefer (Pinus pinaster Ait.)

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Within-stem variation of mechanical properties of Maritime pine timber (Pinus pinaster Ait.) as function of tree class quality and location of the specimens on the stem (percentage of stem height, distance to pith and orientation) is discussed. The results show a strong and consistent effect of the distance to pith on all mechanical properties studied. A trend for the decrease of mechanical properties along the stem (from butt to top) was detected probably due to the growing presence of juvenile wood caused by tree taper and vicinity to crown. Juvenile wood thus seems to play a decisive role on the within-stem variation of mechanical properties. A clear increase on bending strength (55%), modulus of elasticity parallel to grain (99%), compression strength parallel to grain (44%) and tension strength perpendicular to grain (27%) for distance to pith from 10% to 90% of the trunk radius was observed at all tree height levels studied. Orientation (north or south location on the stem) appears to be negligible.


In der vorliegenden Arbeit werden Schwankungen mechanischer Eigenschaften im Stammholz von maritimer Kiefer (Pinus pinaster Ait.) als Funktion von Baumklassenqualität und Ort der Probenentnahme auf dem Stamm (Prozent der Stammhöhe, Entfernung zur Markröhre und Faserorientierung) diskutiert. Die Ergebnisse zeigen einen gleichbleibend starken Einfluss des Abstands zur Markröhre auf alle untersuchten mechanischen Eigenschaften. Festgestellt wurde eine Tendenz zur Abnahme der mechanischen Eigenschaften entlang des Stammes von unten nach oben, was vermutlich auf die Zunahme des Anteils von Juvenilholz bei gleichzeitiger Stammverjüngung in Richtung Baumkrone zurückzuführen ist. So scheint Juvenilholz eine entscheidende Rolle bei Schwankungen mechanischer Eigenschaften in Stammholz zu spielen. Eine klare Zunahme des Einflusses auf die Biegefestigkeit (55%), auf den E-Modul parallel zur Faser (99%), auf die Längsdruck - (44%) und Zugfestigkeit (27%) senkrecht zur Faser bei Entfernung zur Markröhre von 10–90% des Baumumfanges wurde auf allen Ebenen der Stammhöhe festgestellt. Die Faserrichtung (Nord- oder Südorientierung) scheint keine Rolle zu spielen.

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  • Castéra P, Morlier P (1993) Variability of the mechanical properties of wood: randomness and determinism. In Kluwer Academic Publishers, Probabilities and materials. test models and applications, London. NATO ASI Series E: Appl Sci 269:109–118

    Google Scholar 

  • Castéra P, Nepveu G, Chantre G (1999) Principaux facteurs de contrôle de la variabilité du bois chez le Pin maritime (Pinus pinaster Ait.). In : ARBORA De la fôret cultivée a l’industrie de demain. propriétés et usages du pin maritime, Bordeaux, pp 91–101

  • International Organization for Standardization (ISO) (1975a) Wood – Determination of ultimate strength in static bending. ISO standard 3133

  • International Organization for Standardization (ISO) (1975b) Wood – Determination of ultimate tensile stress perpendicular to grain. ISO standard 3346

  • International Organization for Standardization (ISO) (1976) Wood – Test methods – Determination of ultimate stress in compression parallel to grain. ISO standard 3787

  • Johansson M, Kliger R (2002) Variability in strength and stiffness of structural Norway spruce timber – influence of raw material parameters. In: Document 9.5.2 in World Conference on Timber Engineering. British Columbia, CD

    Google Scholar 

  • Kliger R, Perstorper M, Johansson G (1992) Stiffness in structural timber – Effect according to position in the stem. In IUFRO/S5.02 Timber Engineering Meeting. Bordeaux, France

  • Kliger IR, Perstorper M, Johansson G (1998) Bending properties of Norway spruce timber. Comparasion between fast –and slow-grown stands and influence of radial position of sawn timber. Ann Sci For 55:349–358

    Google Scholar 

  • Machado JS, Cruz H (1997) Strength grading of Maritime pine timber. Influence of pith and knots. In IUFRO S5.02 Timber Engineering Conference, Technical University of Denmark, pp 187–198

  • Ormarsson S, Dahlblom O, Persson K (1998) Influence of varying growth characteristics on stiffness grading of structural timber. In: Meeting 31 of CIB-W18, Document CIB-W18/31–5-1. Savonlinna

  • Ormarsson S, Dahlblom O, Persson K (1999) Computer simulations of varying growth characteristics on stiffness grading properties of structural timber. In RILEM Publications sarl, 1st RILEM Symposium on Timber Engineering, Stockholm, pp 549–559

  • Pearson RG, Gilmore RC (1971) Characterization of the strength of juvenile wood of loblolly pine (Pinus taeda L). For Prod J 21(1):23–31

    Google Scholar 

  • Pearson RG, Gilmore RC (1980) Effect of fast growth rate on the mechanical properties of Loblolly pine. For Prod J 30(5):47–54

    Google Scholar 

  • Statsoft Inc (1998) STATISTICA for Windows. Computer program manual. Tulsa. USA

  • Tsehaye A, Buchanan AH, Walker JCF (1995) Stiffness and tensile strength variation within and between radiata pine trees. J Inst Wood Sci 13(5):513–518

    Google Scholar 

  • Zhou H, Smith I (1991) Factors influencing bending properties of white spruce lumber. Wood Fiber Sci 23(4):483–500

    Google Scholar 

  • Zobel BJ, Buijtenen JP van (1989) Wood variation. Its causes and control. Spring, Berlin Heidelberg, New York

    Google Scholar 

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Correspondence to J. S. Machado.

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Machado, J.S., Cruz, H.P. Within stem variation of Maritime Pine timber mechanichal properties. Holz Roh Werkst 63, 154–159 (2005).

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