Top

European Journal of Wood and Wood Products

Published in:

19-01-2021 | Original Article

Influence of insertion angle, diameter and thread on embedment properties of self-tapping screws

Authors: Rafid Khan, Jan Niederwestberg, Ying-Hei Chui

Published in: European Journal of Wood and Wood Products | Issue 3/2021

Activate our intelligent search to find suitable subject content or patents.

search-config

AI-assisted search

Off

Abstract

In laterally loaded connections, inclined installation of self-tapping screws (STS) allows for axial load transfer and significantly higher connection capacity and stiffness. In such a configuration, both the withdrawal and embedment resistances of the screw contribute to the overall load-carrying capacity and stiffness. To account for the contribution of the embedment component, embedment strength of the screw appropriate for the insertion angle is required. In this study, embedment tests were conducted to determine the influence of STS diameter, insertion angle and fastener thread on embedment properties. Using specimens of Douglas fir, a total of 164 embedment tests with 40 different configurations were conducted and analyzed. Test results showed that embedment strength, stiffness, failure mode and yield load are strongly influenced by the insertion angle, whereas the influence of STS thread and diameter is less apparent. These results were compared with those from another study and the feasibility of a model accounting for inclined insertion angles was analyzed.

previous article Cyclic response of insulated steel angle brackets used for cross-laminated timber connections

next article Characterization of cork and cork agglomerates under compressive loads by means of energy absorption diagrams

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Online-Abonnement

Mit Springer Professional "Wirtschaft+Technik" erhalten Sie Zugriff auf:

über 102.000 Bücher
über 537 Zeitschriften

aus folgenden Fachgebieten:

Automobil + Motoren
Bauwesen + Immobilien
Business IT + Informatik
Elektrotechnik + Elektronik
Energie + Nachhaltigkeit
Finance + Banking
Management + Führung
Marketing + Vertrieb
Maschinenbau + Werkstoffe
Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

inform now

Springer Professional "Wirtschaft"

Online-Abonnement

Mit Springer Professional "Wirtschaft" erhalten Sie Zugriff auf:

über 67.000 Bücher
über 340 Zeitschriften

aus folgenden Fachgebieten:

Bauwesen + Immobilien
Business IT + Informatik
Finance + Banking
Management + Führung
Marketing + Vertrieb
Versicherung + Risiko

Jetzt Wissensvorsprung sichern!

inform now

Springer Professional "Technik"

Online-Abonnement

Mit Springer Professional "Technik" erhalten Sie Zugriff auf:

über 67.000 Bücher
über 390 Zeitschriften

aus folgenden Fachgebieten:

Automobil + Motoren
Bauwesen + Immobilien
Business IT + Informatik
Elektrotechnik + Elektronik
Energie + Nachhaltigkeit
Maschinenbau + Werkstoffe

Jetzt Wissensvorsprung sichern!

inform now

ASTM (2018) ASTM D5764-97a: standard test method for evaluating dowel-bearing strength of wood and wood-based products. ASTM International, West Conshohocken

Bejtka I (2005) Reinforcements of structural wood elements with fully threaded screws. PhD Dissertation, Karlsruhe University, Karlsruhe

CEN (2004) Eurocode 5: Design of timber structures. European Committee for Standardization, Brussels

Chui YH, Smith I, Chen Z (2006) Influence of fastener size on lateral strength of steel-to-wood screw joints. For Prod J 56:49–54

Clouston P (1995) The Tsai-Wu strength theory for Douglas-Fir Laminated Veneer. PhD Dissertation, University of British Columbia, Vancouver

CSA (2019) CSA O86-19 Engineering Design in Wood. Canadian Standards Association, Toronto

Dietsch P, Brandner R (2015) Self-tapping screws and threaded rods as reinforcement structural timber elements–a state-of-the-art report. Constr Build Mater 97:78–79. https://doi.org/10.1016/j.conbuildmat.2015.04.028CrossRef

Franke S, Magnière N (2014) Discussion of testing and evaluation methods for the embedment behaviour of connections. Proceedings of International Network on Timber Engineering Research, Bath

Goodman J, Bodig J (1971) Orthotropic beams under normal and shear loading. J Eng Mech 4:83–94

Johansen KW (1949) Theory of timber connections. International Association for Bridge and Structural Engineering 9:249–262

Kennedy S, Salenikovich A, Muñoz W, Mohammad M, Sattler D (2014) Design equations for embedment strength of wood for threaded fasteners in the Canadian timber design code. Proceedings of World Conference on Timber Engineering, Quebec City

Michael A (2008) Connections in timber structures. Frederick Institute of Technology, Nicosia

Mirdad MAH, Chui YH (2019) Load-slip performance of mass timber panel-concrete (MTPC) composite connection with Self-tapping screws and insulation layer. Constr Build Mater 213:698–708. https://doi.org/10.1016/j.conbuildmat.2019.04.117CrossRef

Mirdad MAH, Chui YH (2020) Stiffness prediction of mass timber panel-concrete (MTPC) composite connection with inclined screws and a gap. Eng Struct. https://doi.org/10.1016/j.engstruct.2020.110215CrossRef

Pirnbacher, G, Brandner R, Schickhofer G (2009) Base Parameters of Self-Tapping Screws. Proceedings of CIB W18-Timber Structures, Duebendorf

Reynolds T, Harris R, Chang WS (2013) An analytical model for the dynamic stiffness of a dowel in timber under cyclic load. Eur J Wood Prod 71:609–622. https://doi.org/10.1007/s00107-013-0716-1CrossRef

Ringhofer A, Brandner R, Schickhofer G (2015) Withdrawal resistance of self-tapping screws in unidirectional and orthogonal layered timber products. Mater Struct 48:1435–1447. https://doi.org/10.1617/s11527-013-0244-9CrossRef

Ringhofer A, Augustin M, Schickhofer G (2019) Basic steel properties of self-tapping screws exposed to cyclic axial loading. Constr Build Mater 211:207–216. https://doi.org/10.1016/j.conbuildmat.2019.03.200CrossRef

Risbrudt C, Ritter M, Wegner T (2010) Wood Handbook - Wood as an engineering material (Gen Tech Rep FPL-GTR-190). US Dept. of Agriculture, Forest Service, Forest Products Laboratory, Madison

Rothoblaas (2019) VGS. https://www.rothoblaas.com/products/fastening/screws/screws-structures/vgs#specs. Accessed Feb 20 2020

Rowse RC (1923) The strength of Douglas-Fir in compression at various angles to the grain. Washington University, St. Louis

Sawata K, Yasumura M (2002) Determination of embedding strength of wood for dowel-type fasteners. Jpn Wood Res Soc 48:138–146. https://doi.org/10.1007/BF00767291CrossRef

MTC Solutions (2019) ASSY VG CSK. https://mtcsolutions.com/product/assy-vg-csk-counter-sunk-head/. Accessed Feb 20 2020

Whale LRJ, Smith I, Larsen HJ (1987) Design of nailed and bolted joints. Proposal for the revision of existing formulae in draft Eurocode 5 and the CIB code. Proceedings of CIB-W18A meeting, Dublin

Wilkinson TL (1991) Dowel bearing strength. USDA Forest Service, Forest Products Laboratory, Madison

Title: Influence of insertion angle, diameter and thread on embedment properties of self-tapping screws
Authors: Rafid Khan
Jan Niederwestberg
Ying-Hei Chui
Publication date: 19-01-2021
Publisher: Springer Berlin Heidelberg
Published in: European Journal of Wood and Wood Products / Issue 3/2021
Print ISSN: 0018-3768
Electronic ISSN: 1436-736X
DOI: https://doi.org/10.1007/s00107-020-01651-5

Springer Professional

Abstract

Please log in to get access to your license.

Dont have a licence yet? Then find out more about our products and how to get one now:

Springer Professional "Wirtschaft+Technik"

Springer Professional "Wirtschaft"

Springer Professional "Technik"

Other articles of this Issue 3/2021

Correction to: Characterization of cork and cork agglomerates under compressive loads by means of energy absorption diagrams

Microencapsulation of formaldehyde scavenger agent and its application to veneered panels

Surface color changes of oak (Quercus alba L.) treated with dopamine and iron ion compounds by acceleration of temperature–humidity condition

Influence of radial force and rake angle on ring debarking efficiency of frozen and unfrozen black spruce logs

Surface creation and cutting characteristics during sugar maple wood scratching with spherical cone grit

Investigating the suitability of fly ash/metakaolin-based geopolymers reinforced with South African alien invasive wood and sugarcane bagasse residues for use in outdoor conditions