Determination of stiffness and load carrying capacity of different corner joints in wooden frame construction

In this study, the mechanical performance of different corner joints used in wooden frame construction was investigated. A total of 120 L-type joint specimens including 1 wood material (Scotch pine (Pinus Slyvestris)) x 1 type of glue x 6 joint types (single mortise-tenon, double mortise-tenon, asymmetric mortise-tenon, single mortise-dowel, mitered-dowel and biscuit ) x 2 test types (diagonal compression strength and diagonal tension strength) x 10 replicates were prepared.According to diagonal compression strength results, the maximum strength was found in double mortise-tenon and asymmetric mortise-tenon and the minimum strength biscuit and mitered-dowel joint. Analysis of joint stiffness, the maximum value was found in double mortise-tenon and the minimum value in biscuit joint. According to analysis of joint rotation, the maximum value was found biscuit and the minimum value double mortise-tenon and asymmetric mortise-tenon joint.According to diagonal tension strength results, the maximum strength was found double mortise-tenon and asymmetric mortise-tenon, the minimum strength biscuit and mitered-dowel joint. According to a analysis of joint stiffness, the maximum value was found asymmetric mortise-tenon and one mortise-dowel and the minimum value biscuit and mitered-dowel joint.As a result, double mortise-tenon and asymmetric mortise-tenon L-type corner joints using with scotch pine wood and polyurethane glue were found most appropriate in wooden frame construction.