An investigation on screw holding strength on woods of magnolia tree, maple and chinaberry tree

Different joining methods are used in solid wood for use in furniture production, decoration and construction materials. Materials made of metal, plastic or wood are used for joining. Nails, screws, bolts and staples are the most commonly used metal joining tools. The mechanical performance of the joining points varies depending on the joining device and the material. In this study, the screw holding resistance of magnolia (Magnolia grandiflora L.) tree, maple (Acer trautvetteri Medw.) and chinaberry tree (Melia azedarach) wood was investigated on three different surfaces (tangential, radial and transverse surface). Tests were carried out according to standard EN 13446. In the experiments, 4 x 50 mm zinc screw was used. Trial samples were prepared in 50 x 50 x 50 mm (width x thickness x length) dimensions. The test specimens were drilled for pilot hole with a diameter of 2.5 mm before the screws were installed. In the trials, the screw test specimens were screwed to 30 mm. Experiments were performed on a static material tester. The data were analyzed statistically with two-way ANOVA. According to the data obtained; It was determined that the wood type and the surface on which the screw was attached were significantly effective on the screw holding resistance