Screw withdrawal capacity of full-culm P. edulis bamboo

Kent A. Harries, Phoebe Morrill, Christian Gauss, Chelsea Flower, Yusuf Akinbade, David Trujillo

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
46 Downloads (Pure)


The withdrawal capacity – as determined by a modified ASTM D1761 test – of screws embedded in Phyllostachys edulis bamboo culm walls is presented, demonstrating capacities and behaviour suitable for structural load bearing applications. This study considers twelve screw type-size combinations and considers whether these are predrilled or the screws are inserted without predrilling, resulting in 20 screw type-size-predrill combinations. For the better-performing screws, average withdrawal parameters exceeding fax = 40 N/mm2 were achieved; twice that determined for three-ply plywood having comparable thickness. Comparison with a comparable dataset of screw withdrawal tests from Guadua angustifolia Kunth bamboo indicates that the value of fax is likely species-dependent. In order to mitigate splitting upon screw insertion into bamboo, screw diameters generally less than 6 mm were required unless the screws are inserted into predrilled holes. There was no advantage observed to using self-drilling screws.
Original languageEnglish
Pages (from-to)531-541
Number of pages11
JournalConstruction and Building Materials
Early online date10 May 2019
Publication statusPublished - Aug 2019

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Construction and Building Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Construction and Building Materials, 216, (2019) DOI: 10.1016/j.conbuildmat.2019.05.009

© 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International


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