Alignment & Steel Post Positioning

Galvanised steel H post used when setting out and positioning retaining wall posts
Installation guide · Step 2 of 7

Place a star picket at both ends of each retaining wall section to ensure you maintain a straight line when you attach a string line between both star pickets at the top and bottom. You will need to do this multiple times if your wall is not a straight wall.

Once you have determined the length of sleepers you are using for the retaining wall (including any cut size sleepers to suit your wall lengths), you will mark the centre posts in the ground at the lengths recommended below:

Sleeper Length (mm) Distance from Centre Post to Centre Post, No Fence (mm) Distance from Centre Post to Centre Post, With Fence (mm)
1480mm 1500mm 1510mm
1980mm 2000mm 2010mm
2380mm 2400mm 2410mm
Custom Length 20mm longer than sleeper length 30mm longer than sleeper length

Ensure that all parts of the retaining wall are within your property boundary, including the entire pier holes.

Shop the materials

Not sure on quantities? Use the wall calculator or request a quote and our team will confirm your list.

Planning a wall?

Send us the length and height. We do the take-off.

A tailored quote including delivery across SEQ and Northern NSW, usually within one business day. Sleepers, posts, drainage and every accessory from one yard.

Request a quote Wall height guide Call (07) 3716 0191

Keep reading

More plain English advice from the people who supply the materials.