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What counts as the ground
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A low deck at the top of a retaining wall with no guard.
Every number here is a working estimate. Check it with your building authority.Turn JavaScript on to work the lesson. The drawing shows how it starts.
The rule this lesson teaches
A drop of more than 600 mm (23 9/16 in), or a slope steeper than 1 in 2, within 1.2 m (47 3/16 in) of the edge counts as the ground.