11
（
D=762mm
）
1.2.4
Marking
drilling
position
and
drilling
Determine
the
drilling
position
of
the
buckles
respectively
according
to
the
marked
central
position
in
the
previous
step
(Note
that
there
are
4
buckles
in
total
which
need
8
holes).
Drill
8
holes
with
impact
drill.
1.2.5
Buckle
mounting
Fix
4
buckles
to
the
wall
with
8
setscrews
according
to
the
hole
position
marked
in
the
previous
step.
1.2.6
Hanging
on
the
wall
Lift
the
board,
and
hang
it
on
the
buckle
with
left
side
and
right
side
aligned.
At
same
time,
the
height
of
hook
should
be
a
little
higher
than
the
buckle
(The
following
figure
shows
the
back
side)
Drilling
depth
of
6#
drill
of
percussion
drill
>
80mm
Horizontal
distance
D
from
buckle
center
to
board
center
Horizontal
distance
D
from
buckle
center
to
board
center
Horizontal
distance
D
from
buckle
center
to
board
center
Horizontal
distance
D
from
buckle
center
to
board
center
