Posi Joist

Our engineered Posi Joist system offers an advanced floor and roof solution — blending the versatility of timber with an open steel web interior for exceptional spans, flexibility and service integration. It’s ideal for residential, commercial, multi-unit or island builds where space, routing and speed matter.

Our Process

Design

span calculations, loadings, service access planning.

bespoke joists with steel web and timber flanges produced off-site.

delivered to site, positioned and fixed quickly.

floor deck or roof covering, services routing, final fix.

Benefits

  • Larger spans than traditional solid timber joists
  • Open web design allows easy routing of services (MVHR, plumbing, wiring)
  • Lighter and more efficient than many steel equivalents — cost savings
  • Faster installation, reduced on-site labour
  • Suitable for both new builds and modern renovations/lofts

FAQs

What is a Posi Joist?

An engineered joist with timber flanges and a steel web (Posi-Strut) that allows long spans, service access and structural efficiency.

Yes — they are engineered for a wide range of loads and applications across domestic, commercial and industrial settings.

Yes — less material waste, reduced onsite labour, efficient spans and timber-based construction contribute to lower embodied carbon.

View our projects

Get in touch with us today

3 Oaks Farm, La Gd Rte de Saint-Laurent, Jersey JE3 1NG.

Phone: (+44) 01534 482066

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