Looking at building a retaining wall. Basically have 3 options which I need some advice! Basically total length is around 30 meters with high varing from 400mm to 1000mm.
1. Timber sleepers with steel posts - seems like the strongest wall and clean look. Also steel posts create an additional expense, posted at 2.4m intervals.
2. Timber sleepers with timber posts - strong but need more posts at 1.2/1.5m intervals, however come out cheaper then steel. More labour also installing posts and sleepers.
3. Brick product/gravity wall - boral and austral. These look great and not much of a $$$ premium compared to timber. However these just 'sit' on each other. I'm questioning the strength of this wall, expically at 1m high, these blocks will be 5 units high. What reinforcing is available, and what cost?
Comments would be great.