Screw and Nail-Holding Capacities of Combi Plywood Produced From Eucalyptus, Beech and Poplar Veneer

Combi plywood (combination plywood) consists of plywood made of two or more veneer sheets peeled from different species of wood. Combi plywood has some advantages such as its low weight, low cost, satisfactory performance, and the availability of abundant raw materials. In this study, five-ply combi plywood panels were produced from eucalyptus, beech, and poplar using urea formaldehyde adhesive to combine rotary-peeled veneer sheets. Three plywood groups were produced with different combinations, and we investigated the screw withdrawal and nail holding capacity of the combi plywood. In addition, we determined the air-dried density and equilibrium moisture content of the plywood panels that were produced. The test results were analyzed using the SPSS software program. We used the data that were obtained to determine the combi plywood that provided the greatest screw and nail holding capacities. In addition, we investigated the relationship between density and fastener holding capacity.

Keywords:

Screw holding capacity, nail holding capacity,

PDF

___

Aydin, I., Çolakoglu, G., Çolak, S., Demirkır, C. (2006). Effects of moisture content on formaldehyde emission and mechanical properties of plywood, Building and Environment, 41(10):1311–1316.
Aydin, I., (2004). Activation of wood surfaces for glue bonds by mechanical pre-treatment and its effects on some properties of veneer surfaces and plywood panels, Applied Surface Science, 233(1-4):268–274.
Bal B.C., Bektaş İ, Tutuş A, Kaymakçı A. (2011). The Within-Tree Variation in Some Physical Properties in Eucalyptus Grandis, Düzce Üniversitesi, Ormancılık Dergisi, 7:82–86.
Bal, B.C., Bektaş, İ. Kaymakçi, A., (2012). Toros Sedirinde Genç Odun ve Olgun Odunun Bazı Fiziksel ve Mekanik Özellikleri, Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, 15(2):17–27.
Bal, B.C., (2012). Genç odun ve olgun odunun lif morfolojisindeki farklılıklar üzerine bir araştırma, Düzce Üniversitesi Ormancılık Dergisi, 8(2):29–35.
Bal, B.C., Bektaş, İ, (2012). The physical properties of heartwood and sapwood of Eucalyptus grandis, Pro Ligno, 8 (4):35-43.
Bal, B.C., Bektaş, İ., (2013), Okaliptüs , kayın ve kavak soyma kaplamaları ile üretilen tabakalı kaplama kerestelerin (TKK) bazı fiziksel özellikleri, Artvin Çoruh üniversitesi, Orman fakültesi dergisi, 14(1):25–35.
Bal BC, Özdemir F, Altuntaş E, 2013, Masif Ağaç Malzeme ve Tabakalı Kaplama Kerestenin Vida Tutma Direnci Üzerine Karşılaştırmalı Bir Çalışma, Düzce University Journal of Forestry, 9 (2):14-22.
Bao, F.C. et al., (2001). Differences in wood properties between juvenile wood and mature wood in 10 species grown in China, Wood Science and Technology, 35(4):363–375.
Biblis, E.J., (1985). Composıte plywood wıth southern pıne veneer faces and orıented strand core from sweetgum and southern pıne, Wood and Fiber Science, 17(1):47–57.