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fentec.co.nz
STEP 1 -
MARKING OUT POST HOLES
STEP 2 -
INSTALLING POSTS
A STEP-BY-STEP GUIDE
TO INSTALLATION
Soil Type
Minimum Hole Depth
Approximate Concrete Required
Clay / Firm Earth
600mm
2 bags per hole (20Kg bag)
Sand / Loose Fill
900mm
3 bags per hole (20Kg bag)
If it isn’t possible to fix posts as
proposed here, please contact us for
further information.
Start post may
be existing or
temporary peg
Dig holes
according to
depth chart
below
All holes should be straight
(i.e. Sides parallel or wider
at the bottom than the top
Diameter of all holes is
250mm minimum.
Marker pegs
Mark out post c
entr
es
IMPOR
TANT
IMPOR
TANT
2 .1
2 .2
Fastening posts together
Fixing posts in ground
Approx.
40mm
2 Fasteners approx.
60mm from top of
post
Maximum screw spacing
300mm centres
10 - 16 x 16mm
self-drilling screw
placings.
Screws to conform to
AS3566 Class 3.
-
Place first post in hole
-
Adjust to correct height
-
Support post with temporary brace
-
Fill hole with fully mixed, wet concrete
-
Vibrate and compact the concrete to remove voids.
Align vertically with
spirit level in both
directions
Do not allow soil,
garden fill and/or dirt
to come in contact with
posts as this may cause
the post to corrode
Slop top of
concrete away
from post (to drain
away water)
Bottom
rail approx.
50mm
above
ground
Nominal
30mm
1800mm = 1830mm
