CEA 4001 - Spacing and location of sprinklers

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temperature ovens or stoves.
10.5.2 Sprinkler orientation
Sprinklers in a subsidiary shall be fitted in the up-right position where there is a possibility of frost damage,
except
where dry pendent pattern sprinklers are used.
10.5.3 Size of subsidiary extensions
The number of sprinklers on any subsidiary extension shall not exceed 100. Where more than two subsidiary
extensions
are controlled by one installation control valve set, the total number of sprinklers in the subsidiary
extensions
shall not exceed 250.
10.6 Subsidiary multiple control valve
Sprinkler system extension controlled by multiple control valve utilising sprinklers or sprayers connected to a
sprinkler installation via their own actuation valve (or multiple control valve).
Water spray extensions may be connected to a sprinkler installation, provided that the connection is
no greater than 80mm and that the additional water demand is taken into consideration when
designing the water supplies (see clause7).
These
installations are installed where there are expected to be intensive fires with a very fast rate of fire
spread
and where it is desirable to apply water over a complete area in which a fire may originate and
spread.
11 Spacing and location of sprinklers
11.1 General
11.1.1
All measurements of sprinkler spacing shall be taken in the horizontal plane except where otherwise
specified
in these rules.
11.1.2
A clear space shall always be maintained below the deflector of roof and ceiling sprinklers of
at least:
- 0,5m for LH and OH except for suspended open ceilings;
- 0,8m for suspended open ceilings;
- 1,0m for HHP and HHS.
11.1.3
Sprinklers shall be installed upright, pendent or horizontal as specified by the manufacturer.
11.2 Maximum area per sprinkler
The maximum area of coverage per sprinkler shall be as given in Table 21 for sprinklers other than sidewall
and
in Table 22 for sidewall sprinklers.
Table 21: Maximum coverage and spacing for sprinklers other than sidewall