I have dug a trench and I am going to put 9" deep footings that are 415mm wide and 14.5m long. Can someone help with how much ballast and cement required?
What ratio ballast to cement for a 600mm high retaining wall would be ok?
I am laying my blocks flat over a 10m run holding back roughly 300mm of soil.
How deep should my trench be and how deep should my concrete base be?
On the width I have gone for 415mm in the base.
Thanks