89
12.7 Sprinkler water shields
Sprinklers installed in racks or under perforated shelves or platforms or similar locations where
water from a higher sprinkler or sprinklers may cause wetting close to the bulb or fusible element,
shall be fitted with a non combustible water shield.
Water shields and any supports shall be designed so that they:
• do not affect the sprinkler water distribution negatively
• will prevent water from running down to the sprinkler from the underside of the shield.
The water shield can be a metal water shield with a diameter of min. 0,075m.
It shall be designed to ensure an angle of at least 60° between the sprinkler centreline and a line
from the edge of the shield to the lowest visible part of the bulb or fusible element (see figure 12).
F
12.8 Sprinkler escutcheon plates
Escutcheon
plates
shall
be
made
of
metal
or
a
thermosetting
plastic
material. Escutcheon
plates
shall
not
be
used
to
support
ceilings
or
other
structures.
No
part
of
an
escutcheon
plate
shall
project
from
the
ceiling
below
the
top
of
the
visible
portion
of
the
heat sensitive
element
of
the
sprinkler.
12.9 Corrosion protection of sprinklers
Sprinklers
installed
in
premises
where
corrosive
vapours
are
prevalent
shall
be
protected
in
one
of
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