The Alideck Supa Joist is an aluminium joist that has been designed as a standalone product to be used with Ali-Deck standard aluminium decking, slip-resistant aluminium decking and fire resistant balcony decking. It complements the Alideck System and enables super-fast installation times.

It can also be used as a standalone solution and can be used in conjunction with composite and timber decking options.

This all aluminium system is unique and modular, so it can be extended to any length, it can also be simply connected together to create double the span depending on the desired foundation spacings, please see the specifications tab for the loadings for the single joist span capabilities.

Unlike timber, it will not crack, warp, or swell, its impermeable to insects and deterioration, easy to cut and is fade and stain resistant.

The Alideck Low Joist is a strong aluminium support joist which has been designed to be paired with our aluminium balcony decking boards. The aluminium frames ensure a strong construction that is naturally rust resistant and fire resistant to A2-s1, d0. The aluminium is finished with QUALICOAT powder coating in a choice of textured sand and textured silver grey.


General information


Available in the full range of AliDeck colours


Heat resistant, low maintenance, recyclable, stable in all weather conditions


Qualicoat powder coating finish


6063 T6 aluminium


80 x 30 mm

80 x 105 mm

80 x 50 mm


30 year warranty

Uniclass 2015

Pr_20_76_51_07 Aluminium structural sectionsPrimary
Digital objects
PlatformCompatibleVersionCertified to
- 2 2.1
- 2 2.1
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