Zhang, C., Jung, K., Harris, R. et al. (1 more author) (2022) Drive-in torque for self-tapping screws into timber. Proceedings of the Institution of Civil Engineers: Construction Materials, 175 (1). pp. 31-43. ISSN 1747-650X
Abstract
Self-tapping screws have been widely used in timber constructions nowadays. Current practice considers self tapping screws perform best in connecting two members when they are fully threaded, however the drive-in resistance caused by the friction between woods and screws can potentially damage the screw and reduce the effectiveness of its applications. The relationship between their thread configuration and the drive-in torque force has not been investigated, and how would knots in the member affect the drive-in force remains in question. This study conducted a series of tests aiming to demonstrate the influence of thread configuration on the drive-in torque of screws. Two types of self-tapping screws and three different thread configurations were studied. The drive-in torque for partially threaded screws was found to be significantly slower than that of the fully threaded ones. The results showed knots can significantly influence the positioning of screw and increase the drive-in torque. The application of pre-drilled hole was found to be an effective way to minimise the influence of knots. This article points out that with appropriate consideration of thread configuration, partially threaded self-tapping screws can not only achieve the same efficiency with fully-threaded ones, they will also benefit from reduced drive-in torque force.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 ICE Publishing. This is an author produced version of a paper subsequently published in Proceedings of the Institution of Civil Engineers: Construction Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Timber structures; materials technology; buildings, structures & design |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Social Sciences (Sheffield) > School of Architecture (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 04 Apr 2019 10:30 |
Last Modified: | 24 May 2024 15:10 |
Status: | Published |
Publisher: | Thomas Telford |
Refereed: | Yes |
Identification Number: | 10.1680/jcoma.18.00087 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:144523 |