Investigation of Embedment Strength of Metal Fasteners In Wood Engineered Product And Comparison With EC 5 Predicted Values

The purpose of this study is introduction new wood engineered products and predict their strength in combination with metal fasteners for timber structures construction. Investigation of steel dowel connections is an important issue that has attracted much attention today. There are many innovations in the constructions with the change in wood engineered products. For this research, a new combination of wood- based products was used; three layered structures consisted of birch plywood and OSB layers bonded by a single- component Polyurethane resin in four configurations. The connections used in this study were steel dowels in 6 mm and 8 mm diameter. After producing new layered products, the embedment strength of samples was evaluated and compared to amounts calculated by engineering functions of resistance prediction according to EC5. Results showed that, the effect of the layered composition type on the embedment strength of connection was significant as well as the steel dowel diameter. Increasing of dowel diameter improved the embedment strength of materials. The compound with more contribution of plywood had higher embedment strength. The important point and purpose of this study was the evaluation of the ability of EC5 in prediction of new engineered wood product strength, which reveal that the behavior of four material types could be predicted by EC5 with a sufficient accuracy and all material types had strength without failure occurrence and according to prediction.