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A person searching a zone for a fire should not have to travel more than 60m
from the entrance of a zone to identify the source of a fire. Particular attention
is required when sighting the detectors LED to minimise the search.
SEARCH DISTANCE
The centre of the element of the manual call point should be positioned 1.4m
(+/-200mm) from floor level (unless a wheelchair user is likely to be the first
person to raise the alarm, when this is applicable it should be noted on any
certification). All manual call points should be fitted with a protective cover,
which is moved to gain access to the frangible element.
MANUAL CALL POINTS (MCP)
A person should not have to travel more than 45m along an escape route
to reach a manual call point (25m if disabled person to operate, or rapid fire
development is likely). Manual call points should be sited at all stairwells and
exits from the building.
Less than 300m2 can be covered by a single zone. When the total floor area
exceeds 300m2, each floor would require a zone (or zones if the floor area
exceeds 2000m2 ). Stairwells, liftwells or similar should be separate zones.
Zones should not cross floors.
SECOND
FIRST
GROUND
ZONE 3
ZONE 2
ZONE 1
1.4m +/- 200mm
60m MAX
45m MAX
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