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Australia's Retaining Wall Specialists
Quality concrete sleepers & steel posts delivered Australia-wide
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Melbourne's reactive clay soils demand galvanised steel retaining wall posts engineered for lateral strength and long-term corrosion resistance — and getting the right post series for VIC's variable ground conditions is the single most important structural decision in any retaining wall project. Retaining Walls Direct supplies the full range of hot-dip galvanised H-beam UC and C-channel PFC steel posts to Melbourne builders, engineers, and landscapers, delivered direct to site across metropolitan Melbourne and regional Victoria.
All posts comply with AS/NZS 3678 and AS 4100, hot-dip galvanised to G300 specification for maximum corrosion resistance in Melbourne's wet winters and clay-heavy soils. Available in 100 Series (standard), 150 Series (heavy duty), and 200 Series (premium strength) to suit walls from garden borders to engineer-certified retaining structures.
Melbourne's soil reactivity varies dramatically by region. Inner suburbs on stable fill — 100 Series C-channel suits most standard walls up to 1.0m. Middle-ring eastern suburbs (Doncaster, Box Hill, Ringwood) on Class M/H1 clay — 100 or 150 Series depending on wall height. Outer eastern and western growth corridors (Knox, Maroondah, Wyndham, Melton) on Class H2/E reactive clay — 150 Series minimum, engineer required for walls over 1.0m. Use our Steel Post Sizing Guide for Melbourne-specific recommendations.
Standard spacing 1.8–2.0m centres. Embed to minimum one-third of total wall height below ground — minimum 600mm for any wall. Reactive clay soils in Melbourne's outer suburbs require deeper embedment and may require concrete encasement of post bases — confirm with your structural engineer for walls over 1.0m. VBA building permit required for walls over 1.0m in Victoria.
Pair with concrete sleepers Melbourne and complete every wall with ag pipe drainage and geotextile fabric. See our VIC Engineering & Council Rules guide for permit requirements.
Flat-bed truck delivery to all Melbourne metro suburbs and regional VIC. Request a free Melbourne delivery quote for your project quantities and postcode.