I Joists

Selection of Timber Sizes:
Member Size Depth
145 / 195 / 220
235 / 245 / 300
350 / 400 / 450

Joist Centres (mm): 600
Thickness (mm): 47/63/72/450
JJI Joists
All our JJI Joist floor cassettes are manufactured right here in our Elgin premises, providing a cost-effective and flexible service. Our designers use cutting edge analysis and modelling techniques to design the connections and fittings that ensure our cassettes can integrate seamlessly into any design.
Selection of JJI Joist Sizes
A+ – 47x145mm C24
A+ – 47x195mm C24 / B+ – 63x195mm C24 / C – 72x195mm C24 / D – 97x195mm C24
A+ – 47x220mm C24 / B+ – 63x220mm C24 / C – 72x220mm C24 / D – 97x220mm C24
A+ – 47x235mm C24 / B+ – 63x235mm C24 / C – 72x235mm C24 / D – 97x235mm C24
A+ – 47x245mm C24 / B+ – 63x245mm C24 / C – 72x245mm C24 / D – 97x245mm C24
A+ – 47x300mm C24 / B+ – 63x300mm C24 / C – 72x300mm C24 / D – 97x300mm C24
A+ – 47x350mm C24 / B+ – 63x350mm C24 / C – 72x350mm C24 / D – 97x350mm C24
A+ – 47x400mm C24 / B+ – 63x400mm C24 / C – 72x400mm C24 / D – 97x400mm C24
A+ – 47x450mm C24 / B+ – 63x450mm C24 / C – 72x450mm C24 / D – 97x450mm C24
Advantages with JJI Joists
• 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
c Has independently assured carbon accounting to PAS2050:2011
All joist information and images are for aid only and may not truly represent the joists supplied or designed by your chosen supplier. Always be sure to thoroughly discuss all aspects of your floor design with the supplier ensuring all materials, loadings and specifications are to your understanding.