Posi-Joists

Posi-Joist is a fantastic combination of the lightness of timber with the strength of the Posi-Strut steel web, creating a floor and roof system that allows you to span far greater distances than you could with alternative timber products. This unique feature provides you with unparalleled design freedom across a wide range of applications, whether it’s for domestic, industrial, or commercial purposes.   

Benefits of Posi Joists

  • Lightweight but strong
  • Allows greater span distances
  • Suitable for both floor and roof usage
  • Open web design ‐ easy installation / access to services
  • Faster installation
  • Range of depths from 202mm to 421mm
  • Dimensionally stable with minimal cross‐grain shrinkage
  • Various end fixing details inc “trimmable ends” available
  • Wide flanges for fixing flooring and plasterboard
  • Suitable for use in ground floor applications
  • UK’s first metal web joist system Robust Detail® approved (resistance to the passage of sound)
  • Manufactured from PEFC certified timber

One of the standout benefits of the Posi-Joist system is its ability to support a variety of internal room layouts within an external shell, thanks to its impressive clear spanning capabilities.  

Additionally, the ease of access for the installation and maintenance of services in the floor zone is a clear advantage. This is especially important with the increasing need for MVHR (Mechanical Ventilation and Heat Recovery) systems.  

Posi-Joist offers a perfect and simple solution that simply isn’t possible with alternative solid timber products.   

Posi-Rafters are parallel chord trusses, plated together with Posi-Strut metal webs. Just like Posi-Joist floor joists, they are designed and manufactured offsite and tailored to meet the specific requirements of each individual project.  

Posi-Rafters are suitable for both pitched roofs and flat roofs. They offer greater strength compared to solid timber rafters, allowing them to span further distances and requiring less internal support. 

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