Evaluation and comparison of control and heat treated l-shape furniture joints produced from scotch pine and ash wood under static bending and cyclic fatigue bending loadings


  • Samet Demirel
  • Ruveyda Sener




Ash wood, cyclic fatigue bending, heat treated, L-shape joint, Scotch pine, static bending


This study investigated how the mechanical properties of L-shape joints produced from heat treated Scotch pine or ash wood behaved under cyclic fatigue loading and compared this with the mechanical properties of non-heat treated wood materials. Additionally, static bending performances of the L-shape of joints were investigated and compared to fatigue bending performance of same type of joints. Results indicated that increasing number of staple from 6 to 8 and density generally increased static bending of L-shape joints. Static bending resistance of L-shape joints produced from control Ash wood significantly higher than those of L-shape joints produced from heat treated Ash wood while no significant difference were observed between static bending resistance L-shape joints produced from control Scotch pine and L-shape joints produced from heat treated Scotch pine wood. The fatigue bending resistances of L-shape joints produced from heat treated samples generally passed and failed the same loading steps with those produced from control samples which means both L-shape joints could be used in same service area. L-shape joints under static and fatigue loadings mostly indicated staple leg shear mode. The one under fatigue loading was more than the one under static loading. Additionally, some joints under fatigue loading indicated staple rupture. The overall ratio of static bending loading to cyclic fatigue bending loading for L-shape joints was obtained as 2.85.


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Ahajji, A.; Diouf, P.; Aloui, F.; Elbakali, I.; Perrin, D.; Merlin, A.; George, B. 2009. Influence of heat treatment on antioxidant properties and colour stability of beech and spruce wood and their extractives. Wood Sci Technol 43(1-2): 69-83. https://dx.doi.org/10.1007/s00226-008-0208-3.

ASTM. 2010. Standard test method for mechanical fasteners in wood. American Society for Testing and Materials. ASTM D 1761. 2010. ASTM International: West Conshohocken, PA, USA. https://www.astm.org/Standards/D1761.htm

Boonstra, M.; Acker, J.V.; Tjeerdsma, B.F.; Kegel, E.F. 2007. Strength properties of thermally modified softwoods and its relation to polymeric structural wood constituents. Ann For Sci 64(7): 679–690. https://dx.doi.org/10.1051/forest:2007048

Boonstra, M. 2008. A two-stage thermal modification of wood. PhD thesis, University Henri

Poincaré, Nancy 1., France.

Bengtsson, C.; Jermer, J.; Brem, F. 2002. Bending strength of heattreated spruce and pine timber. In: Proceedings of international research group on wood protection IRG 33 - Cardiff, Wales, United Kingdom. May 2002

Candelier, K.; Dumarçay, S.; Pétrissans, A.; Desharnais, L.; Gérardin, P.; Pétrissans, M. 2013a.Comparison of chemical composition and decay durability of heat treated wood cured under different inert atmospheres: Nitrogen or vacuum. Polym Degrad Stab 98(2): 677–681. https://dx.doi.org/10.1016/j.polymdegradstab.2012.10.022

Candelier, K.; Dumarçay, S.; Pétrissans, A.; Gérardin, P.; Pétrissans, M. 2013b.Comparison of mechanical properties of heat treated beech wood cured under nitrogen or vacuum. Polym Degrad Stab 98(9): 1762–1765. https://dx.doi.org/10.1016/j.polymdegradstab.2013.05.026

Demirel, S.; Zhang, J. 2014. Bending moment resistance of L-shaped two-gusset-plate furniture joints in oriented strandboard. Wood Fiber Sci 46(3): 356-367. https://wfs.swst.org/index.php/wfs/article/view/1078/1078.

Demirel, S; Kalayci, G. 2020. Measuring and estimating shear force of one sta¬pled and one-row multi stapled wood joints. Maderas-Cienc Tecnol 22(3): 395-404. https://dx.doi.org/10.4067/S0718-221X2020005000313

Eckelman, C.A.; Haviarova, E.; Zhu, H. Gibson, H. 2001. Considerations in the design and development of school furniture based on local resources. For Prod 51(6): 56-63. https://www.agriculture.purdue.edu/fnr/faculty/eckelman/pdf/d200106e.pdf.

Gündüz, G.; Korkut, S.; Korkut, D.S. 2008. The effects of heat treatment on physical and mechanical properties and surface roughness of Camiyani Black Pine wood. Bioresour Technol 99 (7): 2275-2280. https://dx.doi.org/10.1016/j.biortech.2007.05.015

General Service Administration. GSA. 1998. SA FNAE-80-214A: Upholstered furniture test method. General Services Administration. Washington, D.C., USA. https://www.gsa.gov/cdnstatic/Upholstered_Furniture_Test_Method.pdf.

Hannouz, S.; Collet, R.; Butaud, J.C.; Bleron, L.; Candelier, K. 2015. Mechanical characterization of heat-treated ash wood in relation with structural timber standards. PRO LIGNO 11(2): 3-10. https://hal.archives-ouvertes.fr/hal-01162542/document.

Kalayci, G. 2019. Investigation of lateral shear resistance of one and two row multi staple joints constructed from different wood species. Master Thesis. Karadeniz Technical University, Trabzon, Turkey. https://tez.yok.gov.tr/UlusalTezMerkezi/tezSorguSonucYeni.jsp.

Kass, A.; Wangaard, F.F.; Schroeder, H.A. 1970. Chemical degradation of wood: the relationship between strength retention and pentosan content, Wood Fiber 2: 31–39. https://wfs.swst.org/index.php/wfs/article/viewFile/1942/1942.

Kaygin, B.; Gunduz, G.; Aydemir, D. 2009. The effect of mass loss on mechanic propertiesof heat-treated paulownia wood. Wood Res 54(2): 101-108. https://acikerisim.bartin.edu.tr/bitstream/handle/11772/1778/A9.pdf?sequence=2&isAllowed=y.

Kocaefe, D.; Poncsak, S,; Boluk, Y. 2008. Effect of thermal treatment on the chemical

composition and mechanical properties of birch and aspen. Bioresources 3(2): 517-537. https://ojs.cnr.ncsu.edu/index.php/BioRes/article/view/BioRes_03_2_Kocaefe_PB_ThermalTreatment_Birch_Aspen.

Kol, H.S.; Sefil, Y.; Keskin, S.A. 2015. Effect of heat treatment on the mechanical properties, and dimensional stability of fir wood. In Proceedings of the 27th International Conference Research for Furniture Industry September 2015, Turkey.

LeVan, S.L.; Ross, R.J.; Winandy, J.E. 1990. Effects of fire retardant chemicals on bending properties of wood at elevated temperatures. Forest Products Laboratory RP: 498. https://www.fpl.fs.fed.us/documnts/fplrp/fplrp498.pdf.

Metsa-Kortelainen, S.; Viitanen, H. 2009. Decay resistance of sapwood and heartwood of

untreated and thermally modified Scots pine and Norway spruce compared with some other

wood species. Wood Mater Sci Eng 4(3-4): 105–114. https://www.tandfonline.com/doi/full/10.1080/17480270903326140?src=recsys.

Özçifçi, A.; Altun, S.; Yapıcı, F. 2009. Effects of heat treatment on technological properties of wood. In 5th International Advanced Technologies Symposium (IATS’09) Karabuk. Turkey. May 13-15.

Ratnasingam, J.; Perkins, M.; Reid, H. 1997. Fatigue: its relevance to furniture. Holz Roh Werkst 55: 297–300.

Ratnasingam, J.; Ioras, F. 2011a. Fatigue strength and design stress of oil palm wood for furniture application. Eur J Wood Wood Prod 69(3): 507-509. https://dx.doi.org/10.1007/s00107-010-0476-0.

Ratnasingam, J.; Ioras, F. 2011b. Bending and fatigue strength of mortise and tenon furniture joints made from oil palm lumber Eur J Wood Wood Prod 69(4): 677–679. https://dx.doi.org/10.1007/s00107-010-0501-3.

Santos, J. 2000. Mechanical behaviour of Eucalyptus wood modified by heat. Wood Sci Technol 34(1): 39–43. https://dx.doi.org/10.1007/s002260050006.

Tankut, N.; Tankut, A.N.; Zor, M. 2014. Mechanical properties of heattreated wooden material utilized in the construction of outdoor sitting furniture. Turk J Agric For 38: 148–158. https://dx.doi.org/10.3906/tar-1211-9

Wang, X.; Salenikovich, A.; Mohammad, M.; Knudson, R. M.; Zhang, J. 2007a. Fatigue bending resistance of metal-plated joints constructed of oriented strandboard for upholstered furniture frames. For Prod J 57(11):59-63. https://www.diva-portal.org/smash/get/diva2:987692/FULLTEXT01.pdf.

Wang, X., Salenikovich A., Mohammad M., Echavarriar C., Zhang J. 2007b. Moment capacity of oriented strandboard gusset-plate joints for upholstered furniture. Part 2: Fatigue load. For Prod J 57(7/8):46-50. https://www.diva-portal.org/smash/get/diva2:979739/FULLTEXT01.pdf.

Winandy, J.E. 1995. Effects of fire retardant treatments after 18 months of exposure at 150 ºF (66 ºC), Forest Products Labratory RN-0264. http://citeseerx.ist.psu.edu/viewdoc/download?doi=

Yildiz, S.; Colakoglu, G.; Yildiz, U.C.; Gezer, E.D.; Temiz, A. 2002. Effects of heat treatment on modulus of elasticity of beech wood In: Proceedings of international research group on wood protection IRG/WP 02-40222, Cardiff, Wales, United Kingdom. May 2002.

Yildiz, S.;Gezer, E. D.; Yildiz, U. C. 2006. Mechanical and chemical behavior of spruce wood modified by heat. Build Environ 41(12): 1762-1766. https://dx.doi.org/10.1016/j.buildenv.2005.07.017.

Zhang. J.; Quin, F.; Tackett B. 2001. Bending fatigue life of two-pin dowel joints constructed of wood and wood composites. For Prod J 51(10):73-78. http://eds.a.ebscohost.com/eds/pdfviewer/pdfviewer?vid=0&sid=97bb5b1a-1125-4b24-90e4-cc0a5f932057%40sessionmgr4007.

Zhang, J.; Chen, B.; Daniewicz, S. R. 2004. Fatigue performance of wood-based composites as upholstered furniture frame stock. For Prod J 55(6):53-59. https://search.proquest.com/openview/3ee0062d5bf0dfdc92923f2f63ac85da/1?cbl=25222&pq-origsite=gscholar.

Zhang, J.;Yu, Y.; Quin, F. 2006. Bending fatigue life of metal-plate-connected joints in furniture-grade pine plywood. For Prod J 56(11/12):62-66. http://eds.b.ebscohost.com/eds/pdfviewer/pdfviewer?vid=0&sid=b814b67f-9b26-41f9-a9fe-309948e9af58%40pdc-v-sessmgr02.




How to Cite

Demirel, S. ., & Sener, R. . (2022). Evaluation and comparison of control and heat treated l-shape furniture joints produced from scotch pine and ash wood under static bending and cyclic fatigue bending loadings. Maderas-Cienc Tecnol, 24, 1–14. https://doi.org/10.4067/s0718-221x2022000100420