12 | EN
OBO Bettermann
Selecting the fire protection duct
5 Selecting the fire protection duct
Depending on the required classification, fire protection ducts with differ-
ent wall thicknesses and mounting systems are used.
5 1
Fire protection duct for direct wall/ceiling mounting
Direct wall and ceiling mounting is particularly appropriate when no
pipes need to be refitted, buildings refurbished or surface refinement is
required, in order to integrate the duct visually into the appearance of the
room. The duct covers are screwed to the duct trough.
Fire resist-
ance /
maintenance
of electrical
function class
Duct type
PYROLINE
®
Con D BSK
Internal
dimen-
sions h x
w in mm
External
dimensions
h x w in
mm
Weight/m in kg
without cable
assignment
I90/E30
BSKD09-K0506
50 x 60
110 x 140
11.0
I90/E30
BSKD09-K0511
50 x 110
110 x 190
13.3
I90/E30
BSKD09-K0521
50 x 210
110 x 290
18.8
I90/E30
BSKD09-K1021
105 x 210
165 x 290
22.0
I120/E90
BSKD12-K0506
50 x 60
130 x 180
16.7
I120/E90
BSKD12-K0511
50 x 110
130 x 230
20.0
I120/E90
BSKD12-K0521
50 x 210
130 x 330
26.4
I120/E90
BSKD12-K1021
105 x 210
185 x 330
31.0
Tab 3:
Fire protection ducts for direct wall/ceiling mounting for maintenance of electrical
function/fire resistance classes E30/I90 and E90/I120
5 2
Fire protection duct for mounting with a support system
Mounting with a support system is particularly useful if obstacles such as
heating, ventilation or water pipes or joists must be refitted. The support
system can consist of
– wall supports,
– suspended supports with support brackets and threaded rods,
– or threaded rods and support rails.
With wall supports, it is possible to compensate for greater differences in
uneven walls or avoid vertical cables or pipelines. Support systems with
a suspended support and support bracket are easier to fill with cables.
If suspended with threaded rods, a smaller mounting area under the
ceiling is required. The selection of the support system is aligned to the
local conditions.
The duct covers are not screwed to the duct trough, thus allowing rapid
inspection and refilling.
