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Retaining Wall Supplies — concrete sleepers and steel posts built for real site conditions

Retaining walls do more than tidy up a yard, they hold back soil, create level ground and help manage sloping blocks. When the wall matters, the right system matters too. 

Steelmart stocks a proven retaining wall setup used across residential and landscaping jobs: precast concrete sleepers, hot dipped galvanised steel posts, and the accessories that make installation cleaner and more consistent 

  • Concrete Sleepers – Block Pattern
  • Concrete Sleepers – Smooth & Plain
  • Concrete Sleepers – Timber Pattern
  • EZY DIY Retaining Wall End Post
  • EZY DIY Retaining Wall H-Post
  • EZY DIY Retaining Wall Corner Post
  • EZY DIY Retaining Post Spade, Post Caps & Sleeper Wedges

If you are building new or replacing a failed wall, start with materials designed to handle soil pressure properly.

Concrete Sleeper Retaining Wall — strong, straight and low maintenance

Concrete sleeper retaining walls use reinforced concrete sleepers installed horizontally between steel posts. They’re one of the most popular choices for residential retaining walls because the system is straight, durable, and built for the job when installed correctly.

Why concrete sleepers are widely used:

  • strong, long service life
  • clean, straight finish (great for boundaries and tight spaces)
  • no rot or termites (unlike timber)
  • flexible look options: block pattern, smooth or timber-style sleepers

Important: installation depth, footing, and drainage behind the wall make a big difference to long-term performance.

Why customers choose Steelmart for retaining wall supplies

  • retaining wall supplies stocked and ready to order online
  • concrete sleepers in multiple finishes (block / smooth / timber pattern)
  • steel post options to suit straight runs and corners
  • accessories to help with alignment and finishing (caps, wedges, spades)

FAQ's

What is a concrete sleeper retaining wall?

A concrete sleeper retaining wall is built using precast concrete sleepers installed horizontally between galvanised steel posts. It’s a popular system for residential and landscaping retaining walls because it’s strong, straight and low maintenance.

Do you sell retaining wall blocks?

Steelmart’s retaining wall range is based around concrete sleepers and steel posts, not standalone “block” retaining wall systems. If you’re after a block look, our block-pattern concrete sleepers give that style in a sleeper system.

What types of concrete sleepers do you stock?

We stock:

  • Block Pattern
  • Smooth & Plain
  • Timber Pattern

What’s the difference between an end post, H-post and corner post?

  • End posts are used to start/finish a run
  • H-posts join sleepers in the middle of a straight run
  • Corner posts are used when the wall changes direction

What is the Australian standard for retaining walls?

Retaining walls must meet relevant building requirements, and walls above certain heights or supporting additional loads often require engineering design and (in some cases) council approval. It’s always best to confirm local requirements for your site and wall height.