Bending Behaviour of Different Types of Timber I-Joist

• Published in: KSCE Journal of Civil Engineering
• Main Author: Wan Abdul Rahman W.M.N.; Mohd Yunus N.Y.; Mohd Khaidzir M.O.; Mohd Sani M.S.H.
• Format: Article
• Language: English
• Published: Springer Verlag 2022
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85125378764&doi=10.1007%2fs12205-022-0066-9&partnerID=40&md5=7c55bbdd09399fac0a0828ba822bd39f

Engineered wood I-joist is a structural system that comprises of flanges and web elements, and utilised as beams in buildings. Both elements must work together as a structural system to fit and meet the strength behaviour of a solid wood beam. The main objective of the study was to determine the bending strength behaviour of I-joist which produced from three types of jointed technique (finger, L-butt and nail plate) of oriented strand board (OSB) web element with two types of flange element (Keruing solid wood and laminated veneer lumber (LVL)). A total of 18 specimens of I-joist were tested to determine the bending behaviour, especially the modulus of elasticity (E) and modulus of rupture (MR). From the result of testing, LVL flanges specimen were obtained almost as strong as the specimens with solid wood flanges. Additionally, either solid wood or LVL flange was shown non-significant variances in bending strength behaviour because the MR values of the I-joist were insignificantly affected by flange element material. The I-joist specimen with finger jointed web was observed to be the strongest specimen when compared with other joints. Furthermore, the weakest joint among the three types of joints were fabricated with nail plate jointed web. The failures mode of the I-joist specimens were observed to fail due to tension or compression. © 2022, Korean Society of Civil Engineers.