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James Jones & Sons

James Jones & Sons Ltd, Timber Systems Division manufactures the JJI-Joist, a structurally engineered timber joist combining high-grade softwood with an engineered composite panel. JJI-Joists are standard building components used in commercial and residential construction as load bearing or non load bearing members for roofs, walls and floors.

A JJI-Joist offers many design and performance advantages over conventional structural products including a resistance to shrinking and warping, an excellent strength to weight ratio, straight and uniform dimensions and FSC accreditation.


Accreditations & Affiliations

  • Structural Timber Design Knowledge
  • PEFC
  • ISO:14001
  • ISO: 9001
  • In House Quality Procedures
  • FSC
  • CE Mark Product
  • BM TRADA Q Mark Product


JJI-Joists Technical Manual
1123 downloads | Download


James Jones & Sons
Greshop Industrial Estate
IV36 2GW
Tel: 01309 671111

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Stackhouse Poland
Pocket Guide
Stackhouse Poland
Pocket Guide