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Australia's Retaining Wall Specialists
Quality concrete sleepers & steel posts delivered Australia-wide
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The 100 Series galvanised steel posts are the standard choice for residential concrete sleeper retaining walls across Melbourne's inner and middle-ring suburbs, where stable soils and walls up to 1.0m suit this proven, cost-effective post series. Retaining Walls Direct supplies 100 UC H-beam and 100 PFC C-channel posts to Melbourne homeowners, landscapers, and fencing contractors, delivered direct to site.
All 100 Series posts comply with AS/NZS 3678 and AS 4100, hot-dip galvanised to G300 specification. The 100 UC 14.8 H-beam provides superior lateral strength for walls subject to higher soil pressure, while the 100 PFC C-channel suits standard residential applications and DIY installations where sleepers are slid in from the side.
100 Series posts are appropriate for Melbourne walls up to approximately 1.0m on stable, well-drained soils — inner suburbs (Fitzroy, Richmond, Hawthorn, St Kilda), bayside suburbs (Brighton, Sandringham, Mentone), and Mornington Peninsula coastal sites. For Melbourne's outer eastern and western suburbs with reactive Class H or E clays, or for walls approaching 1.2m, upgrade to 150 Series heavy duty posts.
Space at 1.8–2.0m centres. Embed minimum 600mm below ground, or one-third of total wall height — whichever is greater. For walls over 1.0m in Victoria, a VBA building permit and engineer's certificate are required. See our Steel Post Sizing Guide for full selection guidance.
Pair with 40MPa concrete sleepers Melbourne for standard applications, and always install ag pipe drainage and geotextile fabric behind the wall. Get a free Melbourne delivery quote today.