Tectonic® Aluminium Decking Subframe Joist (3.6m length)
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Tectonic® Aluminium Decking Subframe Joist (3.6m length)

In Stock, 1-5 day delivery

Tectonic® Aluminium Decking Support Joists are an extremely strong and very long lasting alternative to timber joists. Available in both 'mill finish' and 'powder coated' finishes, ranging from 22 - 72mm height, these high performance joists can be used for installed with all types of OVAEDA Composite Decking boards.

Span Distances

22mm Joists (Black or Mill Finish) - 400mm centres between supports

25mm Joists (Mill Finish) - 600mm centres between supports

38mm Joists (Black or Mill Finish) - 600mm centres between supports

50mm Joists (Mill Finish) - 1200mm centres between supports

72mm Joists (Black or Mill Finish) - 1200mm centres between supports

75mm Joists (Mill Finish) - 1500mm centres between supports


- Available in 3.6m lengths

- 5 heights available to choose from

- Compatible with pedestals and cradles

- Completely weatherproof and suitable for outdoor use

Prices start at
22mm / Black
22mm / Silver
38mm / Black
38mm / Silver
72mm / Black
72mm / Silver
50mm / Silver
75mm / Silver
25mm / Silver
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Aluminium Joist System
The longest lasting decking joist on the market!
Tried and Tested
Full designed system and components available
Joist Span
22mm Joist - 400mm, 38mm Joist - 600mm, 72mm Joist - 1200mm
Low Height
Allows you to create the lowest of deck build-up

Product Details



FREE delivery on all orders over £1000, orders under £1000 will be subject to a £64.95 carriage charge - (3-5 day lead)*. We hold all of our material in stock, so once your order is placed, we are able to arrange the next available delivery slot in your area. If you would prefer to delay your delivery for a more suitable time, please ask a member of the sales team on 0208 159 2999 or by emailing sales@ovaeda.com. Large deliveries are to the property kerbside, a person must be present to help unload goods if required and sign for receipt. For full terms of our deliveries please read our terms and conditions.


What joist is most cost effective?
This depends on the height build up that you have. If you have enough height, it is always the most cost effective to use the 72mm joist as when using this, we can reduce the amount of pedestals require due to the distance it can span between supports
Black or Silver?
Silver is the most cost effective, but this can sometimes be seen down the 6mm gap between boards. The hidden fixing t-clip covers most of the visible joist but for a perfect finish, choose black!
Why choose aluminium joist over timber?
Simply, because they last the longest! If you are installing a long lasting composite decking, then you don’t want the suframe to fail and need replacing in 5-10 years when the composite still has many years of life left!
Can I install it my self?
Yes, our systems are DIY friendly. However, we also work with a team of approved installers.

Downloads and Usefull Links

Installation Guide
22mm Data Sheet
38mm Data Sheet
72mm Data Sheet
Full Subframe Installation
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