Steel Posts
Retaining Wall Posts
Building a safe and stable retaining wall starts with choosing the right retaining wall posts. Our range includes C-channels, H-beams, 90° corner posts and heavy-duty hot-dipped options designed to support both small garden walls and large structural builds. Whether you’re constructing a steel post retaining wall or a heavy-load sleeper system, our posts deliver exceptional strength, stability and long-term performance.
Showing all 8 results
-
90° Corner C Channel 100 x 50 PFC Hot Dipped Galvanized Steel
Price range: $49.50 through $223.50 This product has multiple variants. The options may be chosen on the product page -
Galvabond Steel C Channel 50
Price range: $23.90 through $34.90 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel C Channel 100 PFC (8.33)
Price range: $23.90 through $98.90 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel C Channel 150 PFC (17.7)
Price range: $164.95 through $506.95 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel C Channel 200 PFC (22.9)
Price range: $164.95 through $506.95 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel H Beam 100 UC (14.8)
Price range: $39.90 through $179.90 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel H Beam 150 UC (23.4)
Price range: $199.95 through $486.00 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanized Steel 90° Corner 150 x 75
Price range: $519.00 through $1248.00 This product has multiple variants. The options may be chosen on the product page
Delivering Long-Lasting Value With Retaining Wall Posts
- Engineered for maximum support
Our sleeper retaining wall posts are built to withstand heavy soil loads, sloping blocks, and high-moisture areas common on the Central Coast and across Australia. - Hot-dipped for corrosion resistance
All galvanised retaining wall posts are treated to resist rust, moisture, and weather damage, making them ideal for coastal locations, high-rainfall areas, and long-term outdoor installations. - Perfect fit for concrete sleeper retaining walls
Designed with accurate internal dimensions to hold sleepers securely in place for a straight, stable wall. - Available in C-channel, H-beam & corner posts
Choose from 90° corner posts, standard H-beam uprights or C-channel ends to build any wall layout or shape. - Suitable for structural retaining wall systems
Ideal for steel post retaining wall builds supporting garden beds, terraces, steps, driveways and fencing. - Consistent sizing for easy installation
Precision manufacturing ensures all posts fit standard concrete sleeper sizes, making installation faster and more accurate. - High-quality product selection
From lighter Galvabond options to extra-heavy hot-dipped posts (14kg/m – 73kg/m), we provide the right strength for every wall height.
Heavy-Duty Retaining Wall Posts Built for Australian Soil & Weather
A strong retaining wall relies on strong posts and our collection of retaining wall posts is designed specifically to handle Australian ground conditions. Whether your site has sandy soil, clay, sloping land or high moisture content, our galvanised retaining wall posts provide the support needed to prevent wall movement, bending, or premature failure.
Our product range includes:
- C-Channel Posts
Perfect for the ends of sleeper walls, providing a clean, secure vertical edge. - H-Beam Posts
Ideal for building long, straight walls with strong load-bearing support. - 90° Corner Posts
Used to create precise internal and external corners for multi-directional walls.
- Hot Dipped Galvanised Posts
Designed to withstand moisture, corrosion, salt air and long-term soil pressure.
- Galvabond Steel Posts
A lightweight yet durable option for small-to-medium walls or garden edging.
These posts are suitable for:
- Concrete sleeper retaining walls
- Tiered and terraced garden walls
- Driveway support walls
- Boundary walls with fencing on top
- Large structural retaining wall systems
As experienced concrete sleeper and retaining wall suppliers, we help you choose the right post size, weight and strength for your wall height and soil conditions.
Explore More Products
- Sleeper Retaining Wall Posts
Perfect match for all concrete sleeper systems, ensuring stable wall construction. - Steel Post Retaining Wall Systems
Durable steel posts engineered for large and small retaining wall projects. - Concrete Sleepers
Reinforced sleepers are available in multiple styles and strengths. - Under Fence Plinths
Ideal for installations where fencing needs to be mounted above retaining walls.
Warranty & Returns
All steel posts are covered by a manufacturer-backed warranty protecting against structural defects and material failure. If a post arrives damaged or faulty, we provide prompt replacements or returns.
Shipping & Delivery
We offer fast delivery of retaining wall posts across the Central Coast and surrounding areas. Posts are securely packed and delivered to your site for quick, easy installation. Large or heavy orders can be arranged with a crane truck offload if required.
Frequently Asked Questions
What size retaining wall posts do I need?
The right post size depends on wall height and soil pressure. As a rule, posts should be at least 600mm longer than your wall height so they can be concreted deeply into the ground. Taller walls require thicker and heavier galvanised retaining wall posts for stability.
How deep should the holes be for retaining wall posts?
Post holes typically need to be equal to the height of the wall. For example, a 800mm wall usually requires an 800mm-deep footing. Deeper holes are necessary for high walls, sloping blocks or softer soil.
What is the best type of post for a retaining wall?
For most Australian conditions, the best option is hot-dipped galvanised steel posts. They resist rust, carry more load and last far longer than timber or untreated steel. H-beam posts are ideal for long, straight walls, while C-channels finish the ends cleanly.
Do I need council approval for retaining wall posts?
Walls over 600mm often require engineering and council approval, depending on your site and load. Smaller walls may not need approval, but correct post sizing and footing depth still matter.
Can retaining wall posts be used with all sleeper types?
Yes. Our sleeper retaining wall posts are designed to fit standard concrete sleeper sizes, including heavy-duty, extra-heavy and decorative profiles.