More questions

[Paul2012]

1. I'm going to build a 1 m high retaining wall using sleepers 200X50X2400
I m wondering what is the minimum length size I can use for the posts.


2. I need to cover an area of 4x4 M with 75 MM of roadbase and 25 MM sand, can someone calculate how much of each i would need to order...


thanks paul