Abstract: This manuscript contains study data and supplementary research data.
This study aims to determine the influence of thread parameters of wood screws on withdrawal capacity. Threaded test objects were used for this purpose. This allowed the thread parameters to be varied selectively. Investigated parameters were: thread height a, lead P, lead angle φ, and thread angle α. For this, they were varied on two factor levels. This results in a total of 16 threaded test objects (GP_A to GP_P). The influences in spruce were investigated for a tangential screw-in direction. The threaded test objects can be examined in one screw-in direction at different planes RT and TL of the thread to the wood fiber. The pull-out tests were performed based on EN 1382 (2016).
TechnicalRemarks: The analysis was performed with SPSS Statistics Version 26.0.0.0. Multifactorial analyses of variance (ANOVA) were performed to determine the influence of the factors on the withdrawal capacity. An ANOVA was carried out for each plane RT and TL to the wood fiber. A unified statistical model with the same thread parameters and their interactions was chosen for both planes. This model was developed based on the significant thread parameters and interactions of the individual models of the planes.
