4
STEP-BY-STEP
GUIDE
0800 003 006
/
boundaryline.co.nz
POST
INSTALLATION
We recommend you plan your wall set out/post
position on a piece of paper first to save unnecessary
digging.
Accurately determine the boundary line to where the
wall will be installed, (in some cases a surveyor may
be required) mark this with a string line as per the
diagram below.
STEP 1 –
DETERMINE THE FENCE LINE, POSTHOLE DEPTHS & CENTRES
NOTE
Postholes can be dug by hand or with a mechanical auger. Use the Footing depth table on page 5 to determine your
posthole depth and diameter.
Recommended footing depths listed here are for wind regions A & B plus terrain categories 2.0, 2.5 & 3. If you are
building your wall in a Cyclonic wind area, on the top of a hill, adjacent to an escarpment, on a ridge, or in terrain
category 1, you will need engineering advice beyond the scope of this publication.
BOUNDARY LINE
POST FACE TO POST FACE
POST FACE
STRING LINE
Position off the
boundary line half
the depth of the post
POST FACE TO POST FACE
Determine your posthole centres using the table
below as a guide and mark out your posthole positions
on the ground with line marking paint.
