Reinforcement of Timber Dowel-Type Connections Using Self-Tapping Screws and the Influence of Thread Configurations

The application of self-tapping screws as reinforcement on glulam connections has been proven effective. However, the implication different thread configurations effectiveness remains unknown. This paper conducted experiments using with various in embedment-strength tests and tensile connection tests. Results show that one third achieved similar improvement embedment strength mechanical properties fully threaded screws. implies properly reducing length ensures easier screw installation than influence screw-to-dowel distance was also investigated two distances (0.5 d 1 d) were adopted, ‘d’ being diameter dowel. difference due to insignificant. group placed contact dowel 5% higher at a distance. showed good agreement confirms reduced can enhance load-carrying capacity ductility level reinforced by