08/05/2025
Personally I would never advise using treated pine Sleepers for a retaining wall.
Even more so when there is no machine access to repair it as it will always most certainly need after 10 years(that's only it was built correctly the first time).
This wall was built by the developers and had collapsed in places.
Due to budget constraints, the owners of the wall went with sleepers again.
Engineering required posts to be increased to 200mm,sleepers 75mm thick and doubled original embedment depth .
So holes were jackhammered, and the scissor shovelled to 1.5m.
Don't know that I would take another one on like this, but everyone is pleased with the result(at least for another 10 years)