CEA 4001 - Page 80

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Table 23: Sprinkler location relative to beams
Minimum horizontal
dista
nce from
sprinkler
vertical axis to
side of
beam or joist (a in
figure 8)
Maximum height of sprinkler deflector (d) above (+) or below (-) bottom of
beamor joist (b in figure 8) (m)
Conventional sprinkler
Spray sprinkler
m
Upright
Pendent
Upright
Pendent
0,20
0,40
0,60
0,80
1,00
1,20
1,40
1,60
1,80
-0,20
0,00
0,03
0,06
0,10
0,14
0,19
0,26
0,39
not allowed
not
allowed
not
allowed
not
allowed
-0,20
-0,17
-0,12
-0,03
0,17
-0.02
0,00
0,02
0,03
0,05
0,10
0,13
0,16
0,18
-0.02
0,00
0,06
0,12
0,20
0,28
0,36
0,47
0,67
NOTE : dimensions may be interpolated
11.4.9 Platforms, ducts etc.
Sprinklers shall be provided under platforms, ducts, heating panels, galleries, walkways etc. which are:
a) rectangular, more than 0,8m wide and less than 0,15m from adjacent
walls or partitions;
b) rectangular and more than 1,0m wide;
c) circular, more than 1,0m in diameter and less than 0,15m from adjacent
walls or partitions;
d) circular and more than 1,2m in diameter.
11.4.10 Escalators and stair wells
The number of sprinklers shall be increased around the ceiling opening formed by escalators,
stairs etc. Sprinklers shall not be more than 2m nor less than 1,5m away from each other. If, owing to
the design of the structure, e.g. girders, the minimum distance of 1,5m cannot be maintained,
smaller spacing may be used provided adjacent sprinklers are not able to wet each other.
The horizontal distance between the sprinklers and the opening in the ceiling shall not exceed 0,5m.