Our aluminium decking joists (3.6m) are designed for superior strength and long-lasting performance, making them the ideal solution for your raised composite decking project. Made from high-quality T6 aluminium, these aluminium joists offer exceptional corrosion resistance while remaining lightweight for easy handling and installation. The black powder-coated finish provides extra protection and ensures a discreet appearance beneath your deck.
Before installation, ensure you lay a weed membrane over any soil, grass, or previous vegetation areas to prevent unwanted growth beneath your deck.
Measuring 75mm (H) x 40mm (W) x 3600mm (L), these aluminium joists require adjustable pedestal supports every 1.2 metres, reducing the number of supports needed, which saves both time and money. This efficient design makes our aluminium decking frame perfect for creating a stable and durable foundation for your decking boards, whether you’re a professional contractor or a DIY enthusiast.
Securing the aluminium joists into position is straightforward with our aluminium joist hangers and flat joining plates, especially when using our decking clips supplied with self-drilling screws, ensuring a secure and stable decking structure. Perfect for creating raised deck areas, our aluminium joists offer the strength and durability you need for a deck that’s built to last.











Great product and great finish
Made building the deck very easy
These decking joists were used alongside a local steel fabrication company, as the underside of the deck is visible and required a clean, tidy finish. They were an excellent choice—well finished, lightweight, and very strong. Delivery was prompt via their own team, which was a nice touch. I will definitely be returning for future purchases. Very satisfied.
Excellent quality . Very well made . Light but very strong .
I would definitely recommend these to friends and family .
Absolutely brilliant