Aluminium Posts and Beams
Aluminium posts and beams from Spanmor are engineered to work as one frame, so the load transfers properly and the spans meet Australian standards. Strong, light and quick to put up, they suit decks, pergolas, carports and outdoor rooms perfectly well.
Faster installation
When aluminium beams and posts are engineered to be paired with matching brackets and connectors, you can run longer spans with fewer posts holding them up. That means fewer footings to dig and a frame that goes together quickly. And with aluminium being much lighter than steel, the parts are easier to handle on site, so there's less lifting and less labour.
Low maintenance and longer life
Aluminium doesn’t rot, split or warp the way timber does. There's no repainting or staining to keep up with, which saves you time and money over the life of the structure. And with its strength-to-weight ratio, the posts and beams stay straight, leading your deck or pergola to hold its shape for decades.
Design flexibility and aesthetic options
Sleek, modern profiles that are also colour matched; that’s the kind of design flexibility you get with choosing aluminium posts and beams for your structure.
Our aluminium structures are available in multiple sizes and profiles, from 40 mm joists to 235 mm bearers, to suit various applications.
Choose mill finish or powder‑coated colours matched to popular Colorbond® shades and create a cohesive look across posts, beams and other outdoor elements.
For bushfire zones and coastal climates
Our aluminium beams and posts are non-combustible and certified for all BAL zones, so they hold up in bushfire-prone areas. They're also termite-proof and corrosion-resistant, which makes them a good fit for coastal builds. You can use our span charts and engineering documentation to make sure your design meets AS1170, AS4055 and AS4600 standards.
Start with the right material
Get in touch with Spanmor to talk through sizing, span charts and colour options. We'll help you pick the right aluminium posts and beams for your project and point you to the resources you need to make installation easier.
Frequently Asked Questions
Got questions about Spanmor products, installation, or compliance? We’ve answered the most common ones here to help you plan with confidence.
Can I mix aluminium posts and beams with timber elements?
For optimal performance and compliance, it’s best to use a complete aluminium framing system. Mixing materials can compromise structural integrity and void warranties.
What sizes are available?
Beam profiles range from 40 × 50 mm joists up to 235 × 50 mm bearers, while posts start at 90 × 90 mm and increase to 150 × 150 mm for heavier applications.
Do posts and beams come in different colours?
Yes. Mill finish is standard, but powder‑coated options include Pearl White, Primrose, Woodland Grey, Monument and Satin Black.
How do aluminium beams and posts compare to steel or timber?
Aluminium is lighter, corrosion‑resistant and easier to install, yet still delivers high structural strength and long spans. Timber can rot or warp, while steel can rust. Overall, aluminium provides long‑term durability with minimal maintenance.
Spanmor Aluminium System - Limited Warranty