POSI struts are a clever alternative to standard timber joists which are lighter, stronger, and much easier to work around on-site.
At US Truss, we create custom-make POSI struts using timber chords and steel webs, giving you a reliable flooring or ceiling solution with plenty of flexibility for plumbing, electricals, ducting and more.
They’re a favourite with builders and sparkies alike and once you’ve used them, you’ll know why.
Multi-storey homes
Townhouse developments
Units and apartments
Flat or low-slope roof framing
Any build that needs easy service access
They’re especially handy for saving time and money on site — no cutting, drilling, or stuffing around.
Every POSI strut we manufacture is designed using certified software and built to meet Australian building codes. We use structural-grade timber and galvanised steel webs for lasting performance in all conditions.
Got a question about how POSI struts work, where to use them, or what makes them different from regular joists? You’re not alone. We’ve answered some of the common questions we get from builders, sparkies and project managers right here.
If you ca’t find what you’’re looking for, just reach out and we’re always happy to help.
They're mainly used as floor or ceiling joists, especially in two-storey homes or units where you need to run pipes and wiring between levels.
POSI struts are made using timber chords (top and bottom) connected by steel webbing. This gives them strength, flexibility, and an open design.
Yes, that's the biggest advantage. Their open web design means plumbers and electricians can run services through the gaps without cutting or drilling.
Absolutely. We manufacture all POSI struts in line with AS/NZS standards using certified software and materials.
Yes, we deliver to metro Melbourne, regional areas and all major building zones across Victoria.
Send us your construction plans and we’ll provide a fast quote. We’ll take care of the layout, assembly, and delivery — ready for your team to get straight into the build.