Aluminium Metal Joists


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aluminium joists in three sizes for super strong decking sub-structure

Aluminium Metal Joists


The aluminium metal joist are the ultimate decking patio support solution, when installing a decking area. This strong support system is also A1/A2 fire rated. Using the aluminium metal joists substructure allows you to create a sturdy base for your project that will not need replacing over time, unlike a traditional wooden frame, which would eventually rot. Quickly becoming the go to substructure in the industry. Widths of all joists is 48mm, choice available is for the 3 heights only.

Joist support spans.

25mm joist - 400mm
50mm joist - 600mm
75mm joist - 1000mm
*This is not a 100% requirement for the composite decking Also available in black powder-coated option here.

Available in Aluminium in three heights.

  • 25mm
  • 50mm
  • 75mm

Lengths are 3600mm (3.6m) and widths are all 48mm.

Do these come in any other lengths?

No all our aluminium joists are only available in a length of 3.6m

Do you do black aluminium joists?

Yes you can view our black powder-coated aluminium joists here.

Do I have to use the aluminium joists for my framework / sub-structure?

No you do not have to use the aluminium, you can choose to use a regular wooden framework below. We do not supply this other option, but your installer will be able to easily source this for you.

Delivery 3-5 working days

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