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The 150UC 23.4 galvanised H post is the heavy-duty middle post for taller and higher-load retaining walls — a deeper, stronger section than the 100 series. Hot-dip galvanised to AS/NZS 4680, in lengths from 2400 to 5600mm. Australian-made, delivered Australia-wide by Retaining Walls Direct.
Written and product-checked by the Retaining Walls Direct team — supplying steel-post retaining wall systems across Australia. Last updated: June 2026.
Step up to the 150 series for taller walls, reactive clay, surcharge loads or wider post spacing. The H-beam accepts concrete sleepers on both sides; pair with 150-series C and corner posts from the steel post range.
Post length = retained height above ground plus embedment. Taller walls need proportionally more embedment — always have post size, spacing and footing designed by an engineer for walls in this range (engineered walls over 1 metre, post sizing guide).
| Section | 150UC 23.4 (Universal Column), H-beam |
|---|---|
| Role | Heavy-duty middle post — sleepers both sides |
| Lengths | 2400 – 5600mm |
| Galvanising | Hot-dip galvanised to AS/NZS 4680 |
| Compliance | AS 4678-2002 Earth-retaining structures |
| Brand | Retaining Walls Direct (Australian-made) |
Add caps, brackets & hardware and drainage — a drainage kit, ag pipe and geo matting. See how to build a concrete sleeper retaining wall.
Send your postcode and quantities for a freight quote, or contact the team.
When do I need 150 series instead of 100?
For taller walls, reactive clay, surcharge loads or wider post spacing — confirm by engineering.
What lengths are available?
2400 to 5600mm.
Will it rust?
No — hot-dip galvanised to AS/NZS 4680.
Can you deliver to me?
We deliver across most of Australia. Send your postcode and quantities for a freight estimate.
