CEA 4001 - Pipework in Concealed Spaces

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vulnerable to mechanical impact:
- horizontal, pipes less than 0,45m long, feeding individual sprinklers;
- drop or rise pipes less than 0,6m long feeding individual sprinklers.
15.2.3 Design
Pipe supports shall either be approved or designed in accordance with the requirements of Tables 28 and
29.
15.3 Pipework in concealed spaces
Where sprinkler protection is required in concealed spaces such as false ceilings and floors, the
pipework shall be designed as follows:
15.3.1 False ceilings above LH or OH occupancies
Sprinklers above the ceiling may be fed from the same range pipes as the sprinklers below the ceiling.
15.3.2 All other cases
The sprinklers in the concealed space shall be fed from separate range pipes. In the case of pre-
calculated systems,
distribution pipes feeding sprinklers both inside and outside the concealed space
shall be no less than 65mm diameter.
T
Table 28: Design parameters for pipe supports
Nominal pipe diameter
(d)
mm
Minimum load
capacity
at 20°C
(1)
kg
Minimum cross
section
(2)
mm²
Minimum length of
anchor bolt
(3)
mm
d≤50
50 <d≤100
100<d≤150
150<d≤200
200
350
500
850
30 (M8)
50 (M10)
70 (M12)
125 (M16)
30
40
40
50
NOTE 1: when the material is heated to 200°C the load bearing capacity
shall not deteriorate more than 25%.
NOTE
2: the nominal cross section of threaded rods shall be increased so
that
the minimum cross section is still achieved.
NOTE
3: the length of anchor bolts depends on the type used and the
quality
and type of material into which they are to be fixed. The
values
given are for concrete.