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I-Joists & Engineered Wood

Timberlink…James Jones JJI-Joist distributor for Midlands & Wales

What are I-Joists?

I-Joists known as I-Beams, are a composite engineered timber joist combining 45mm deep high-grade finger jointed softwood flanges with a 9mm thick oriented strand board web. Four flange widths are available at 47, 63, 72 and 97mm wide, section heights 220,245,300,400mm, lengths - 10,12,13.2m. Using advance technology these components are combined to produce an innovative alternative to conventional construction timber with many advantages.

They are widely used in the UK, particularly as floor joists also as roof and walls. Their high strength-to-weight ratio, low weight, ease of installation and economy in use of materials make them popular, especially for long spans and multi-story structures.

I-joists have better dimensional stability than solid wood, so they shrink or swell less when ambient conditions change. I-joists are the main structural component in the off-site manufacture of some panelized systems.

 Send us your plans to design & quote

  For designs & advice contact:

  01630 638111


JJI-Joists are designed to give a superior strength to weight ratio when compared to traditional solid timber enabling the manufacture of longer and lighter structural members. JJI-Joist, with a softwood flange can:

  1. Span longer distances
  2. Easier to handle
  3. Easier to fix and nail
  4. Less prone to splitting
  5. Quicker to install
  6. Extremely stable
  7. Reduces building maintenance
  8. Provides a less complex design solution
  9. Simple to specify using product specific software
  10. Has Part E compliant details available
  11. Is FSC or PEFC accredited
  12. Has very low embodied energy
  13. Has independently assured carbon accounting to our Environmental Product Declaration (EPD) 
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