PCD
Concrete Sleeper Retaining Wall FAQ's
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How heavy are PCD concrete sleepers?
1.6m – 60kgs
2.0m – 70kgs
2.4m – 80kgs
What spacing should I use for setting steel posts?
1.6m – 1.6m
2.0m – 2.0m
2.4m – 2.4m
If you are placing a colourbond or timber fence on top of the retaining wall you will need an extra 10mm on each side to allow space for the fence bracket, M12 nut and bolt.
What size post length should I use for a retaining wall over 1000mm high?
For all walls over 1000mm you must engage a Structural Engineer and organize development approval from
your local council. In some cases, you may require approval from a Structural Engineer for retaining walls under
1000mm high pending on what the wall is retaining.
Other Regulations
Other regulations may also need to be considered, such as:
- Minimum distances to a neighbouring property
- Planning scheme overlays (heritage, flood, acid sulphate soil etc)
- They must not divert water to a neighbouring property
- Minimum distances to easements, sewerage pipes and water mains
- Minimum distances to bodies of water such as lakes, dams, creeks and rivers.
- In some cases, a retaining wall may be needed instead of a fence between properties.
- It is the responsibility of both homeowners to build the retaining wall according to Australian Standards
“Retaining walls can become a matter of dispute if a neighbour experiences unwanted effects from the
construction of a retaining wall. They may experience water coming into their yard or other effects from the
construction of a retaining wall. If that is the case, they may lodge a complaint to council and the builder of the
retaining wall will have to tear it down or make adjustments to the retaining wall to be sure it doesn’t have an effect
on a neighbouring property.”
How do I create a corner or angle post for a retaining wall?
You can use 2 x C posts to create corners and angles by placing them back-to-back, clamping them together
and removing the clamp after the concrete has set. In some cases, the corners will need to be tack welded
depending on the weight of the retaining wall.
How long will the Optimum Seal last and what can I use to touch up concrete sleepers?
PCD Optimum Seal will last up to 5 years if they are looked after, to touch up the concrete sleepers you can purchase our Optimum sealer from PCD in 1, 5 and 10 litre drums. Apply this sealer using a paint roller to roll over the top of your concrete sleepers.
What does 40MPa mean?
This is the strength of the concrete used. All PCD concrete sleepers reach 55-60MPa which surpasses the
Australian standard of 40MPa.
What is the life span of PCD concrete sleepers?
PCD concrete sleepers carry a 60-year design life if handled and correctly installed.
For drainage gravel, geo textile fabric and agi drain coil application.
Please refer to our retaining wall installation guide