I-joists by James Jones, available at Timberlink, Shrewsbury, Market Drayton, Shropshire, Stoke-on-Trent, Telford, Midlands

Timberlinkā€¦James Jones JJI-Joist distributor for Midlands & Wales

Send us your plans to design & quote

For designs & advice contact:
Chris Fairclough
01630 638111

 I-Joists technical manual (Download 22.8mb)


JJI-Joists are designed to give a superior strength to weight ratio enabling the manufacture of longer and lighter structural members. The JJI-Joist, with a softwood flange.

  • Is capable of spanning longer distances
  • Is easier to handle
  • Is easier to fix and nail
  • Is less prone to splitting
  • Is quicker to install
  • Is extremely stable
  • Reduces building maintenance
  • Provides a less complex design solution
  • Is simple to specify using superior software
  • Has Part E compliant details available
  • Is FSC®/PEFC® accredited
  • Has very low embodied energy
  • Has independently assured carbon accounting to PAS2050:2011

What are JJI-Joists?

JJI-Joists made by James Jones make up 40% of the UK market and are the brand most specified by architects. They are FSC® certified and manufactured in the UK to a very high specification using top quality C24 Scandinavian solid (not composite, as most other brands) timber horizontal finger jointed 45mm flanges, bonded to a 9mm OSB/3 web. JJI-joists, weighing around half the weight of solid timber, are very easy to handle and install on site.

JJI-Joist range and tolerances

JJI-Joists are available in a comprehensive range of sizes, designed specifically for the UK market. JJI-Joists are available in lengths of up to 12m. For information span and load information please see the interactive span table here