Posi-Strut range of products are parallel chord trusses using timber chords “on flat” and the unique Posi-Strut metal webs.


Posi-Truss is a made to order parallel chorded truss commonly used as long span floor joists. They provide an economical and high quality floor structure which is easily assembled and provides excellent access for plumbing, electrical services and air conditioning ducts.

The efficient use of timber, combined with the strength of the Posi-Strut webs make the Posi-Strut range of products very lightweight yet strong structural members.


Posi-Struts offer the following advantages over solid joists:

  • Plumbing, electrical conduit and other services can be run between chords and webs.
  • No drilling or notching required to accommodate services.
  • Additional width available for fixing flooring.
  • Ceiling material can be fixed directly to the truss bottom chords.
  • Larger clear spans.
  • Internal load bearing walls, piers or stumps and bearers can be reduced or eliminated.
  • Shrinkage problems sometimes encountered with unseasoned solid timber are reduces or eliminated.
  • Lightweight and easy to handle.
  • Load sharing ability.
  • Strongback bracing increases floor stiffness and reduces squeaky floors.
  • Optional top chord support reduces on-site labour.
  • With Posi-Purlins, roof and ceiling can be fixed direct.
  • Top chord support.