AliDeck Supa Joist for Aluminium Metal Decking

The AliDeck Supa Joist is an integral part of the AliDeck System and is our heavy-duty joist option, designed to act as both a support post and a large-spanning joist.

Compatible with all AliDeck decking boards and fully compliant with fire regulations, achieving A1 following independent fire safety tests. The Supa Joist is ideal for use on balconies, terraces and walkways that require the largest beam span possible.

  • Fire Resistance: A1 and A2fl-s1

  • Span: up to 3000mm

  • Weight: 4.93kg per linear metre

  • Standard Stock Lengths: 6m

  • Coating Thickness: 60-80 microns

  • Warranty: 30 years

  • Life Expectancy: 60 years

  • Colours: Full Range

AliDeck Non-Combustible Aluminium Metal Decking Supa Joist

Build complex structures using the AliDeck Supa Joist

The AliDeck Supa Joist was designed to provide the versatility to act not only as a support beam but also as a post. This heavy-duty joist allows for structures of any size and shape to be constructed from scratch, to create raised deck areas, steps, walkways, and much more.

By coupling the Supa Joist with our Adjustable Feet, and our L and T brackets strong and stable build-up can be easily achieved. AliDeck Nosing Profile can be applied to the risers of constructed steps to provide a neat and aesthetic finish.

Once your raised platform structure is in place, it is then a simple task to install your AliDeck aluminium decking boards.

The Supa Joist is a large spanning, heavy duty aluminium support beam. Capable of spanning 3 metres, the Supa Joist has been cleverly designed to allow multiple joists to be connected together to achieve even greater strength for applications where larger spans are required.

The Supa Joist is compatible with the entire AliDeck range of boards, pedestals, and accessories.

AliDeck Supa Joist Foot

Supa Joist Foot

AliDeck Supa Joist L Connection Plate

L Connection Plate

AliDeck Supa Joist Large L Bracket

Large L Bracket

AliDeck Supa Joist Small L Bracket

Small L Bracket

AliDeck Supa Joist T Connection Plate

T Connection Plate

Supa Joist can be notched and fixed within steelwork to achieve low build-up height using our Notched Supa Bracket

Aluminium joists are far superior than timber or steel joists as they will not rot or rust; aluminium is naturally resistant to corrosion. Aluminium is also non-combustible, making it the only viable option when used in areas that require fire-resistant materials only.

The AliDeck Supa Joist can be used with any AliDeck System Decking Board and is fully compatible with all of our Pedestal solutions.

  • Benefits include:

    • Increased span capabilities against timber or composite
    • Extremely strong and durable
    • All aluminium
    • Quick and easy to install
    • Low maintenance
    • Recyclable
    • Stable in all weather conditions
AliDeck Non-Combustible Aluminium Metal Decking Supa Joist Assembly Diagram
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AliDeck Supa Joist Technical Data

Click to view full datasheet for the AliDeck Supa Joist.

Supa Joist
AliDeck Non-Combustible Aluminium Metal Decking Supa Joist

Domestic Component Disposition: Supa Joist Spans

SINGLE JOIST SPANS – Between Supports (Centre Line of Joists in mm) 600 1000 1200 1500 2000
SINGLE JOIST SPANS – STANDARD Specification 1/350 3600 3100 3000 2700 2500
SINGLE JOIST SPANS – FIRM Specification 1/480 3200 2800 2700 2500 2300
DOUBLE JOIST SPANS – Between Supports (Centre Line of Joists in mm) 600 1000 1200 1500 2000
DOUBLE JOIST SPANS – STANDARD Specification 1/350 5000 4200 4000 3800 3400
DOUBLE JOIST SPANS – FIRM Specification 1/480 4500 3800 3600 3400 3100
  • Domestic Load = 1.5kN SQM

Commercial Component Disposition: Supa Joist Spans

SINGLE JOIST SPANS – Between Supports (Centre Line of Joists in mm) 600 1000 1200 1500 2000
SINGLE JOIST SPANS – STANDARD Specification 1/350 2600 2300 2200 2000 1800
SINGLE JOIST SPANS – FIRM Specification 1/480 2400 2100 2000 1800 1700
DOUBLE JOIST SPANS – Between Supports (Centre Line of Joists in mm) 600 1000 1200 1500 2000
DOUBLE JOIST SPANS – STANDARD Specification 1/350 3600 3100 3000 2800 2500
DOUBLE JOIST SPANS – FIRM Specification 1/480 3300 2800 2700 2500 2300
  • Commercial Load = 5.0kN SQM

Supa Joist

Ali-Deck's Supa Joists are manufactured from aluminium, and only need to be installed every 1900mm / 1200mm (depending on the loadings that are required) which means quicker installation.

Low Profile Adjustable Brackets

Low Profile Adjustable Brackets are a solution driven product, specifically designed for installations where a low threshold is required, the brackets can be as low as 70mm and up to 125mm (from the top of the boards to the ground).

Ali-Deck Aluminium Decking Boards

The decking board shown is the Standard Interlocking Board. Alternative Ali-Deck boards include:

  • Slip Resistant Board
  • Senior Balcony Board
  • Junior Balcony Board
  • Senior Flat Balcony Board
  • Junior Flat Balcony Board
  • Rooftop Terrace Board

End Plates

The end plates are made from aluminium and are available for all our decking boards.

AliDeck Datasheets

AliDeck Senior Balcony Board Spec Sheets

AliDeck Senior Balcony Flat Board

AliDeck Junior Balcony Board Spec Sheet

AliDeck Junior Balcony Flat Board

AliDeck Standard Interlocking Board

AliDeck Lite Balcony Board

AliDeck Adjustable Pedestal

AliDeck Multi Directional Pedestal

AliDeck Supa Joist Spec Sheet

AliDeck Low Joist Spec Sheet

AliDeck Lite Joist Spec Sheet

AliDeck Micro Joist Spec Sheet

AliDeck Nosing Profile Spec Sheet

Triple Bolt Channel Spec Sheet

Balcony Drainage System Spec Sheet

Low Profile Adjustable Brackets Spec Sheet

Fire Retardant Tape Spec Sheet

AliDeck Spreader Plate Spec Sheet

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