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What will your 200mm high wall be retaining?
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Old railway sleepers?
See if you can find something else. They’re toxic! -
My dad built a cool wall from sleepers by concreting some i-beams and c-beams into the ground vertically, with the gap between them the length of the sleepers, then slotting the sleepers down into them.
Like this when viewed from the top:
[SLEEPER][SLEEPER][SLEEPER]
The beams were sunk about a foot down and it didn't need any further foundation along the length of the sleepers, just some damp proof membrane.
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@root
Has anybody built a retaining wall from sleepers? I need to build a perimeter wall 4x3m square 200mm high. I was wondering what kind of foundation I needed.