Determination of some physical and mechanical properties of edge glued wooden panels (EWP) produced with various manufacturing techniques

In this study, technical properties of Edge Glued Wooden Panels (EWPs) in the market which were made by different techniques were investigated. EWP?s were made of the woods of Oriental Beech (Fagus orientalis L.), Duglas Fir (Abies bornmülleriana Mattf.) and Calabrian Pine (Pinus brutia Ten.). Plain, triangular and finger edge joints and kleiberit-303 and dorus- MD073 glues were used in order to get edge glued wooden panels by considering radial and tangential grain directions. The samples used in bending and tensile strengths, density, shrinking and swelling tests were prepared in accordance with the standards of TS 11971, TS 2470,TS 4083 and TS 4084, respectively. Bending and tensile tests in parallel and perpendicular to the grain direction were made in accordance with the TS 11971, density of the wooden materials were made in accordance with the TS 2472, dimensional changes (swelling, shrinking) were made in accordance with the TS 4083 and TS 4084. The interaction beech ? finger joint ? dorus glue in bending strength in perpendicular to the grain direction (119,40 N/mm2), the interaction of beech ? finger joint ? dorus glue in bending strength in parallel to the grain direction (16,39 N/mm2) and the interaction of beech ? radial direction ? finger joint in tensile strength in perpendicular to the grain direction (5,06 N/mm2) give the best results. According to the results of dimensional changing, the interaction of beech ? finger joint ? dorus glue in swelling in the longitudinal direction (% 0,39), the interaction of beech ? radial direction ? dorus glue in swelling in transverse direction (% 1,22), the interaction of beech ? finger joint ? kleiberit 303 glue in shrinking in the longitudinal direction (% 0,09) and the interaction of Calabrian pine ? radial direction ? rectangular edge joint in shrinking in transverse direction gives the best results.