Our 100mm heavy duty charcoal concrete sleeper is the structural specification for retaining walls over 1.2m, driveway walls with vehicle surcharge, and all engineer-specified designs across Australia. Where a 75mm sleeper reaches its structural limit, the 100mm steps in — delivering the additional section depth and mass needed to handle the higher lateral earth pressures that taller walls and surcharge loads impose.
With 40+ years of hands-on retaining wall experience across Australia, we supply 100mm charcoal sleepers that meet AS 4678-2002 Earth Retaining Structures requirements. Delivered direct to your site, Australia-wide.
100mm sleepers require posts with a wider channel to accommodate the increased thickness. Always pair with H-Beam (UC) steel posts — C-Channel posts are not appropriate for 100mm sleepers or walls over 1.2m. See our full guide: H-Beam vs C-Channel — Which Do You Need?
75mm sleepers are the standard residential thickness for walls up to approximately 1.2m with no surcharge load. Specify 100mm for walls over 1.2m, driveway walls, or any engineer-specified design. See our full guide: 75mm vs 100mm Concrete Sleepers — Which Should You Choose?
Walls over 1.0m require approval in most Australian states. All walls must comply with AS 4678-2002. See our Retaining Wall Regulations — State-by-State Guide.
Delivered direct to your site across Sydney, Melbourne, Brisbane, Perth, Adelaide, Canberra, Gold Coast, and regional Australia. Get a free quote with delivery cost to your address.
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