5
3d
max. 3 m
max. 3 m
max. 15 m
max.
7,5 m
max. 3 m
max.
15
mm
ax.
7,5
m
Hallways with a width > 3 m:
Hallways (L/U-shaped) with a width greater than 3 m are
to be visualised extended at the arms of the angle and
viewed as individual rooms. The resulting ‘rooms’ are to be
fitted with smoke alarms accordingly.
4a
> 3 m
> 3 m
4b
>
3m
> 3 m
> 3 m
Note
The requirements apply not only for hallways but also for
rooms with these geometries (for example, corner room).
4.3.5 Rooms with slanted ceilings
•
For peaked roofs with an angle >20°, the smoke alarm
should be installed at a distance of at least 0.5 m and no
more than 1 m from the gable peak; see Figure 5a.
5a
0,5 m
0,5 m
>20°
•
Note the following for rooms with only a partially slanted
ceiling: If the horizontal ceiling is less than 1 m wide, the
smoke alarm should be fitted on the slanted ceiling in
accordance with Figure 5b.
5b
>20°
max. 1 m
0,5
m
0,5
m
•
If the horizontal ceiling is wider than 1 m, the smoke
alarm should be fitted in its centre.
5c
>20°
> 1 m
0,5 m
0,5 m
•
Roofs with angles of ≤ 20° can be handled the same as
horizontal ceilings (see
4.3.3 Standard rooms
).
4.3.6 Raised horizontal surfaces and galleries
If a room is subdivided horizontally, for example, through
a raised horizontal surface or gallery, an additional smoke
alarm is required beneath if:
•
both the area beneath the subdivision (raised horizontal
surface, gallery, etc.) is greater than 16 m²
•
and the length and width each exceed 2 m.
4.3.7 Rooms with joists/beams
For rooms with beams or other joists, the following require-
ments must be observed depending on dimension:
