Hi we brought a nice flat block or so we thought we did, (1mtr slope over 30mtrs). Anyway we have our tender letter back and now we find out that we have to retain out the back as they are cutting into the block a bit. What I want to know is how close can i put this new timber retaining wall to the old timber retaining wall before I run into all kinds of problems. We are on the low side. It's approx 20mtrs long and 900 high. Where the builders have placed the wall is so it's far enough away from the footings (1500) BUT I want to know if i can go closer to the old wall say 600mm to give us enough room to put a deck off our bedroom. Where it is at the moment I was going to use 200x50x3.0 sleepers and 100x100 posts at 1500 centres. Am I leaning in the right direction or am I way off base here???. All help is greatly appreciated.
Regards, Rick