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Australia's Retaining Wall Specialists
Quality concrete sleepers & steel posts delivered Australia-wide
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Retaining Walls Direct supplies concrete sleepers for retaining walls across Adelaide and South Australia — delivered direct to your site across Adelaide metro, the Adelaide Hills, Barossa Valley, Fleurieu Peninsula, and regional SA. Adelaide's unique combination of reactive Keswick Clay in the northern suburbs, sandy loam in the south, and the steep terrain of the Adelaide Hills creates a diverse range of retaining wall challenges — and we have the materials and 40+ years of trade experience to solve all of them.
40MPa concrete sleepers are the standard residential specification for walls under 1.0m in stable, well-drained ground. Suitable for Adelaide's southern coastal suburbs on sandy loam soils.
50MPa concrete sleepers are the recommended specification for the majority of Adelaide retaining wall projects. Reactive Keswick Clay across the northern and central suburbs (Elizabeth, Salisbury, Morphett Vale, Noarlunga) demands 50MPa for long-term structural performance.
60MPa concrete sleepers are the premium specification for walls over 1.5m, heavy surcharge, and all engineer-specified designs requiring maximum compressive strength.
Adelaide's reactive Keswick Clay is widespread across the plains and expands significantly during winter rains, placing cyclic lateral loads on retaining walls. Getting the specification right for your specific Adelaide suburb is critical. See our full guide: Retaining Walls Adelaide — Complete Guide 2026.
Walls over 1.0m require council approval and structural engineer's certification under the Planning, Development and Infrastructure Act 2016. All walls must comply with AS 4678-2002 Earth Retaining Structures. See our Retaining Wall Regulations — State-by-State Guide.
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