Preventa Aluminium Joists

Raaft Aluminium Joists provide a platform for decking, paving, and other surfaces. The rails reduce the need for pedestals which greatly increases the speed of installation.

The 30mm Joist is ideal for terraces with shallow build-up or restricted headspace to create one seamless indoor to outdoor landscape while the 50mm Joist is ideal for installing paving, porcelain tiles, or porcelain decking on a raised terrace or podium construction. Both heights are available in a cost-effective mill finish.

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Joist for Timber Decking


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Technical Support

Download Joists Datasheet Download Joist for Timber Decking Datasheet Download Install Guide Download Technical Drawings (PDF) Download Technical Drawings (DWG)

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30mm Joist Length 2.4m
30mm Joist Width 72mm
50mm Joist Length 2.4m
50mm Joist Width 70mm
Material Aluminium

Suitable for:

  • Raaft¬†Terrace System
  • Decking Products
  • Natural / Porcelain Tile Products
  • Steel Planter Systems
  • Floor Structure Panels
  • Artificial Grass


  • Simple to install
  • Shallow build-up easily enables seamless indoor to outdoor spaces
  • Supports Green Building certification
  • Made from recycled products
  • Lightweight
  • Reduces need for ground levelling or steps
  • Reduces quantity of pedestals

NBS Spec

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