Skip to main content

Research Repository

Advanced Search

Dynamic performance of multi-webbed engineered timber joists

Bahadori-Jahromi, Ali; Ridley-Ellis, Daniel


Ali Bahadori-Jahromi


The introduction of engineered beams offered longer span, lower cost joists in comparison to traditional solid timber sections; however, vibration criteria in the design codes may significantly reduce the permissible span of joists for domestic construction. This research is concerned with the structural performance of engineered, multi-webbed, composite, timber joists of double I, box and box-I, cross sections in comparison with commonly used I beams and solid timber joists for use as repetitive members of flooring systems. The paper details results and findings of a series of experiments designed to ascertain the dynamic performance of empty and polyurethane-filled, multi-webbed, composite, timber beams.


Bahadori-Jahromi, A., & Ridley-Ellis, D. (2008). Dynamic performance of multi-webbed engineered timber joists. Journal of the Institute of Wood Science, 18, 87-93.

Journal Article Type Article
Publication Date Dec 1, 2008
Deposit Date May 25, 2015
Print ISSN 0020-3203
Electronic ISSN 2041-9430
Peer Reviewed Peer Reviewed
Volume 18
Pages 87-93
Keywords Beam; composite; dynamic performance; vibration; natural frequency;
Public URL
Publisher URL