Product · Retaining Wall Steel
Galvanised H Posts, C Posts & Sleeper Retaining Wall Steel
Fabricated H-posts, C-posts and corner posts for sleeper retaining walls — residential, commercial and civil projects across Australia.
Specification & Supply
Hot-dip galvanised universal beam (UB) and parallel flange channel (PFC) sections fabricated into H-posts, C-posts and corner posts for engineered sleeper retaining wall systems. Common stock sizes available cut-to-length, with custom lengths and capping plates available on request. Mill direct options for bulk landscape, civil and government projects — subject to availability.
- Galvanised H-posts fabricated from 100UB, 150UB and 200UB
- C-posts and corner posts fabricated from 75PFC and 100PFC
- Hot-dip galvanised after fabrication to AS/NZS 4680
- Cut to length to engineer's specification
- Suits hardwood, treated pine and concrete sleeper systems
- Bulk and trade quantities for landscapers, civil contractors and councils
Specifications
AS/NZS 3679.1 · AS/NZS 4680| Product Type | H Posts · C Posts · Corner Posts (fabricated from UB & PFC) |
|---|---|
| Steel Grade | 300PLUS structural — available in grades to AS/NZS 3679.1 depending on size and availability |
| Finish | Available in black steel, primed or hot-dip galvanised after fabrication (HDG to AS/NZS 4680) |
| H-Post Sections | 100UB · 150UB · 200UB — sized to wall height and engineer's design |
| C-Post Sections | 75PFC · 100PFC — used at wall ends, returns and corners |
| Standard Lengths | 0.9m · 1.2m · 1.5m · 1.8m · 2.4m · 3.0m — custom lengths available on request |
| Sleeper Compatibility | Hardwood, treated pine and concrete sleepers — typical 75mm and 100mm sleeper widths |
| Applications | Sleeper retaining walls, batters, terraced gardens, civil retaining, landscape walls, council projects |
H-Post Sizing Guide
Indicative · engineer-specified| Section | Typical Wall Height | Typical Use |
|---|---|---|
| 100UB H-Post | Up to 0.9 m exposed | Light residential terraces, low garden walls |
| 150UB H-Post | 0.9 – 1.5 m exposed | Standard residential retaining, raised garden beds |
| 200UB H-Post | 1.5 – 2.0 m exposed | Heavy residential and light civil retaining |
| 250UB H-Post | 2.0 – 2.7 m exposed | Civil and commercial retaining — engineer-designed |
C-Post & Corner Post Guide
PFC sections| Section | Application | Notes |
|---|---|---|
| 75 PFC | End and corner posts (light) | Pairs with 100UB and 150UB H-post walls |
| 100 PFC | End and corner posts (standard) | Pairs with 150UB and 200UB H-post walls |
| 150 PFC | End and corner posts (heavy) | Pairs with 200UB and 250UB H-post walls |
Sleeper Compatibility
Hardwood Sleepers
Standard 200×75mm and 200×100mm hardwood sleepers slot directly into the H-post web.
Treated Pine
200×75mm H4 treated pine — common in residential garden retaining and terracing.
Concrete Sleepers
Pre-cast concrete sleepers (typically 1580–2400mm spans) suit 150UB and 200UB H-post spacing.
Steel Capping
Optional capping plates supplied to protect the top sleeper and provide a finished edge.
Stock, Lengths & Delivery
- Available in common stock lengths including 6.0m, 7.5m and 9.0m depending on product and availability.
- Cut-to-length supply available on request — supply your cutting list with your quote.
- Bulk and project quantities available — mill direct pricing on larger orders, subject to availability.
Why contractors buy steel from us
Trade WholesaleMill direct supply
Sourced direct from Australian and approved overseas mills — bulk pricing without the merchant markup.
AS/NZS compliant
Steel manufactured to recognised Australian Standards. Mill certificates supplied on request for engineered jobs.
Cut to length
Mill lengths, standard fencing lengths or cut-to-size packs — palletised ready for site.
Australia-wide freight
Direct truck loads, part loads and palletised freight to metro, regional and remote project sites.
Bulk & project quantities
From single pack to full mill order — priced for fencing contractors, fabricators and infrastructure programs.
Trade-only pricing
We supply the trade — fencing contractors, fabricators, steel merchants, landscapers and government buyers.
Frequently Asked Questions
What size H-post do I need for my retaining wall?+
As a general guide: 100UB suits walls up to 0.9m exposed, 150UB suits 0.9–1.5m, and 200UB suits 1.5–2.0m. Final sizing must be confirmed by a structural engineer based on soil conditions, surcharge and wall height.
Are your H-posts galvanised?+
Yes — H-posts are fabricated from structural UB sections then hot-dip galvanised after fabrication to AS/NZS 4680 for long-life corrosion protection in ground contact applications.
Can you cut H-posts to a custom length?+
Yes. Custom lengths are available on request — standard stock lengths are 0.9m, 1.2m, 1.5m, 1.8m, 2.4m and 3.0m. Capping plates can be supplied on request.
What sleepers fit your H-posts?+
Our H-posts suit standard 200×75mm and 200×100mm hardwood, treated pine and pre-cast concrete sleepers — the most common sleeper sizes used across Australia.
Do you supply bulk quantities for civil and council projects?+
Yes — bulk and project-based supply is available for landscape contractors, civil contractors and councils, with trade pricing on large orders subject to availability.