Steel Posts
Retaining Wall Posts
Shop Online for Steel Retaining Wall Posts
Are you looking for steel retaining wall posts for your construction in Sydney? Check out our hot dippped galvanised steel H posts and C channels for all your retaining wall needs. At Gorilla Wall, our standard stock includes galvanised retaining wall posts up to 3m high. If you require anything longer, simply contact us today and see how we can help you. As the home of steel sleeper posts and all things retaining walls, we’re sure to be able to source what you need.
Whether you’re building a small garden structure or a large engineered retaining system, our range of retaining wall posts in Sydney is designed to support concrete sleepers. Every post is built to withstand soil pressure, moisture, movement and Sydney’s harsh climate.
- Note that our standard 75mm or 80mm thick concrete sleepers require the 100UC steel posts.
- Note that our heavy duty 100mm thick concrete sleepers require the 150UC steel posts.
Providing the finest concrete retaining walls posts, Gorilla Wall offers delivery and collection services in Sydney.
Showing all 17 results
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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 90° Corner 50
Price range: $29.00 through $42.90 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 -
Galvabond Steel H Post 50
Price range: $29.90 through $42.90 This product has multiple variants. The options may be chosen on the product page -
H Beam 250UC (52kg/m)
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Hot Dipped Galvanised Steel C Channel 100 PFC (8.33)
Price range: $23.90 through $154.00 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel C Channel 150 PFC (17.7kg/m)
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 (22.9kg/m)
Price range: $215.65 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 (14.8kg/m)
Price range: $39.90 through $299.50 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel H Beam 150 UC (23.4kg/m)
Price range: $199.95 through $626.50 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel H Beam 150 UC (30kg/m)
Price range: $348.50 through $652.50 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel H Beam 150 UC (37kg/m)
Price range: $426.50 through $1,099.50 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel H Beam 200 UC (46kg/m)
Price range: $523.50 through $1,330.00 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel H Beam 200 UC (59kg/m)
Price range: $699.40 through $2,098.20 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel H Beam 250 UC (73kg/m)
Price range: $1,210.50 through $2,377.50 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanised Steel H Beam 250 UC (89.5kg/m)
Price range: $1,943.30 through $3,886.50 This product has multiple variants. The options may be chosen on the product page -
Hot Dipped Galvanized Steel 90° Corner 150 x 75 (35.4kg/m)
Price range: $519.00 through $1,248.00 This product has multiple variants. The options may be chosen on the product page
What Makes Our Retaining Wall Posts The Better Choice?
- Engineered for maximum strength and support
Our retaining wall posts are manufactured using premium steel designed to support heavy loads and high retaining walls. Perfect for steep blocks, clay soils and areas with high water exposure. - Hot-dipped galvanised for extreme durability.
All galvanised retaining wall posts are treated to resist corrosion, rust and moisture, ensuring long-term performance even in coastal Sydney suburbs. - Designed for all concrete sleeper systems
Our sleeper retaining wall posts are precision-made to hold sleepers tightly in place, ensuring straight, rigid walls that do not bow or shift over time. - Perfect for residential, commercial & civil projects
Whether you’re supporting driveways, garden beds, fences or large retaining structures, our retaining wall post solutions in Sydney deliver long-lasting stability.
Stronger, Safer & Longer-Lasting Steel Post Retaining Walls
A steel post retaining wall is the strongest retaining wall system currently used in Australia. It combines reinforced concrete sleepers with galvanised retaining wall posts to create a structure that can support heavy loads, resist soil movement and withstand decades of exposure to the elements.
Steel posts offer several advantages:
- They do not rot, warp or break down
- They maintain their shape under pressure
- They last far longer than timber
- They hold sleepers securely in place
- They are compliant with engineering standards
- They are suitable for walls over 600mm requiring certification
This makes sleeper retaining wall posts the preferred choice for builders, landscapers and homeowners seeking durability and long-term reliability.
Explore More Products
- Concrete Sleepers
High-strength concrete sleepers are designed for durable retaining walls across Sydney’s varied soil and weather conditions. - Sandstone Concrete Sleepers
Natural-style sleepers offering the look of real sandstone with the durability of reinforced concrete for premium landscapes. - Charcoal Concrete Sleepers
Modern, dark-toned sleepers are ideal for contemporary retaining walls and stylish outdoor designs. - Colorbond Fence Panels
Durable steel fence panels used for boundary fencing, privacy screening and installations above retaining walls.
Warranty & Returns
All products come with a comprehensive warranty. As trusted suppliers of retaining wall posts in Sydney, we ensure every post meets Australian standards for durability, safety and engineering performance.
Shipping & Delivery
We offer fast Sydney-wide delivery for all sleeper retaining wall posts, C-Channels, H-Beams and complete retaining wall systems. Orders are packed securely and delivered on time to keep your project running smoothly.
Frequently Asked Questions
How deep should the post holes be?
Post holes should be dug to a depth of equal height to the wall to ensure proper structural support. For example, if your retaining wall is 1m high, your posts will need to go 2m into the ground. Deeper holes are generally required for higher walls, clay soils and sites with heavy soil movement.
What is the best type of post for a retaining wall in Sydney?
The best option for Sydney is galvanised retaining wall posts because they offer superior resistance to rust, moisture and soil pressure. Sydney has a mix of clay, coastal and sandy soils, making galvanised steel the most reliable long-term material. These posts maintain their shape, support heavy concrete sleepers and withstand decades of outdoor exposure.
Do I need council approval for my retaining wall?
Most councils in NSW require approval for retaining walls over 600mm high. Approval may also be needed if the wall supports a driveway, fence or building load, or if it sits on a boundary line. Larger engineered walls often require certification by a structural engineer. It’s still important to check local council guidelines because rules vary between suburbs.
What are the benefits of installing steel retaining wall posts?
Steel retaining wall posts are incredibly strong and designed to safely support heavy concrete sleepers. They do not rot, warp or break down like timber, making them ideal for long-term outdoor use. Hot-dipped galvanising protects them from rust and moisture damage, especially in Sydney’s variable climate.
Are sleeper retaining wall posts suitable for DIY installation?
Yes, sleeper retaining wall posts are suitable for DIY projects, especially for low retaining walls under 600mm. Their consistent sizing makes installation straightforward for beginners. However, taller or load-bearing retaining walls require deeper footings and careful structural planning.
How long do galvanised retaining wall posts last?
High-quality retaining wall posts typically last 40-60 years, depending on soil conditions and drainage. The galvanised coating prevents rust and corrosion, even in wet or clay-heavy areas. Proper installation with adequate drainage gravel can extend the lifespan even further.