No Diving or Jumping.
Observe all Safety Rules.
Additional crushed
limestone (or equivalent)
j. Carefully
dig out
each patio
stone
trench.
Measure
from the
centreline
painted on
the ground
and the
line be-
tween the
stakes.
Do
not
dig the trenches too large
or too deep; the ground
around the edges of each
trench must
remain firm and
undisturbed.
k. Temporarily replace the
strings removed in step (i) to
check that the trenches are
exactly parallel
. Remove the
strings again when you are
finished.
l. Spread a layer of crushed
limestone (or equivalent) 1"
(25 mm) thick into the bottom
of the of each trench. Pack
firmly.
m.Place a concrete patio stone
12" x 12" square x 2" thick (30 x
30 x 5 cm) into each trench,
on top of the limestone layer. Make sure
it is level
and positioned correctly.
n. Fill the trenches in with crushed limestone (or
equivalent). Fill them up to the top edges of the
patio stones. If the limestone is dry spray it with
some water to help with the compaction. Stand on the patio stone
and tamp down the limestone until a solid base is achieved (stand-
ing on the patio stone helps prevent the stone from moving). Add
additional limestone as required. Do not tamp too hard or the patio
stone will move.
o. Recheck the distances between the patio stone and make any ad-
justments you need to make sure the spacing is
exactly
right. Refer
to page 1-10, Step 6 for measurements.
• See the drawing on the next page for an overview of all the
parts used to install the buttresses, verticals and base rails.
1-11
20" (51 cm)
20" (51 cm)
3" (8 cm)
26“ (66 cm) to face
of patio stone
Pool Wall Line
String line between
stakes D and E
or F and G
(N.B. the pool wall
will lie on this line)
Painted centreline
of trench
Concrete
patio stone
12" (30 cm)
square
22" (56 cm)
26
Concrete patio
stone
Trench
Concrete patio stone
Crushed limestone (or equivalent) base
1“ (25 mm) in bottom of trench
Crushed limestone (or equivalent) base
1“ (25 mm) in bottom of trench
27
28
Caution:
Make sure there is
adequate drain-
age
in the bottom
of each trench
and along the
sides of the pool
area. There
must
be adequate
drainage for a
safe and secure
pool foundation.
29
!
Hint:
Crushed lime-
stone
or equiva-
lent
must
be used
instead of brick
sand or
vermiculite to
backfill the patio
stone trenches.
The level of
compaction
achieved by using
crushed limestone
or equivalent is
superior to that of
brick sand or
vermiculite.
Caution:
Brick sand or
vermiculite
cannot
be used on any
part of the buttress
installation proc-
ess. These materi-
als have poor
compaction prop-
erties that can
cause problems
with the buttresses
after the pool has
been filled with
water.
