Influence of the specimen preparation on the embedment strength of self-tapping screws

Description

Due to their simple application and their wide-ranging applicability, self-tapping timber screws are either
used for various types of connections or reinforcements in timber constructions. Apart from axial loading, self-tapping
timber screws can be also loaded lateral, whereas the embedment strength fh is one of the major parameters in the design
process. The experimental determination of the embedment strength fh, following EN 383, demands test procedures with
thin timber specimen, whereas during the screw-application initial crack forming under specific conditions occur. As this
has an unwanted and negative influence on fh, a new way of specimen preparation was developed, with which initial crack
formation can be excluded. Besides the presentation of this new method, the contribution also contains an experimental
verification, which may lead to a significant modification of the current design model of fh of self-tapping screws.

Period	22 Jun 2023
Event title	13th World Conference on Timber Engineering: Timber for a Livable Future: WCTE 2023
Event type	Conference
Location	Oslo, NorwayShow on map
Degree of Recognition	International