Engineered I-Joists

Big choice. Better Joist.

hyJOIST® Engineered I-Joists from Dindas are cost effective and lightweight perfect for residential and commercial construction. hyJOIST is strong, light weight, easy to install and available in a wide range of sizes. hyJOIST gives you more options for designing economical floor joist layouts.
More options for more economical floor joist layouts
Select the economy section (HJ240 45, HJ300 45 & HJ360 63) of appropriate depth to accommodate the spans of the main area of the floor. Cater for any larger spans in the floor area using the wider flange options of corresponding depth.

To make your job easier we provide a free Design & Take-off service 


Consisting of structural LVL flanges and a structural plywood web connected using a Type A waterproof bond, hyJOIST is strong, light and easy to install.

  • Straight, uniform & dimensionally stable in a lightweight form
  • Greater design flexibility for an economical floor joist layout 
  • Available in 10 section depths
  • Three different flange widths
  • Long lengths up to 13.2 metres
  • Easier installation of services within the floor space
  • Easier to install compared to hardwood and steel alternatives
  • Sourced from environmentally sustainable plantation pine
  • Stringent quality control - EPWAA certified
Certification & Compliance
hyJOIST flanges are manufactured in accordance with AS/NZS 4357, and the plywood web is manufactured in accordance with AS/NZS 2269.  hyJOIST is product certified by the Engineered Wood Products Association of Australasia (EWPAA), which is JAS-ANZ certified.  Participation and compliance with this process based quality control scheme ensures ‘Evidence of Suitability’ in accordance with Clause 1.2.2 of the Building Code of Australia (BCA).
Peace of mind against termites
hyJOIST is also available treated (H2-S) for protection against termites and other insects in above ground, weather protected applications in areas south of the Tropic of Capricorn. It gives all the benefits of structural LVL with added termite deterrent qualities.
Dindas hyJOIST Design eGuide » Download PDF (2.7 MB)
Dindas hyJOIST Install eGuide » Download PDF (3.1 MB) 
Dindas hyJOIST Weather Exposed Data Sheet » Download PDF (414 KB)


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