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Construction supports characteristics
The European standard for fire dampers foresees a precise correlation
between the wall/floor characteristics and the fire resistance class
obtained, as well as the correlation between wall/floor used for the
test and wall/floor used for the actual installation.
The test results obtained on a type of wall/floor are valid also for wal-
ls/floor of the same type but with greater thickness and/or density
than those used in the test.
For plasterboard walls, the test results are also valid for walls with a
greater number of plasterboard layers on each side.
As a result, the indicated thickness and density characteristics are to
be considered as minimum values.
The wall/floor in which the fire dampers are installed must be fire
class certified according to the standards foreseen for the structure.
Rigid walls
Can be made with aerated concrete blocks, poured concrete, concre-
te panels, perforated cell elements in concrete or brick in accordance
with the following characteristics:
• minimum thickness 100 mm;
• minimum density 500 kg/m³.
The use of a reinforcing beam above the opening is recommended
for walls made from concrete blocks, bricks or in concrete cell ele-
ments.
For walls built with perforated elements, it is also recommended that
the area of the opening be made from full elements (for example
aerated concrete blocks) to guarantee the correct adhesion of the
mortar.
1. Reinforcing beam
Light plasterboard vertical walls
During testing, light plasterboard walls have been used with the fol-
lowing characteristics:
• U-shaped horizontal metal frame (50 mm) and C-shaped vertical
frame (49 mm) made from 0,6 mm thick sheet metal;
• Vertical profiles placed with a maximum spacing of 625 mm
between each other;
• Filling made of rock wool with density up to 100 kg/m³ (optional);
• Each side is made from two plasterboard layers 12,5 mm thick, una-
linged to avoid alignment between the joints of the layer above
and below.
The following indications are given for the installation walls:
• metal profiles minimum width: 49 mm;
• metal profiles minimum thickness: 0,6 mm;
• vertical profiles placed with a maximum spacing of 625 mm
between each other;
• vertical profile fixing with selfthreading screws or by clinching to
the bottom horizontal profile and insertion in the top horizontal
profile;
• profiles fixed using self-threading screws or by clinching on every
intersection.
• installation of a frame around the damper with base and height
where shown in the installation instructions;
• Filling made of rock wool with density up to 100 kg/m³ (optional);
• each side is made from two plasterboard layers 12,5 mm minu-
mum thick, unalinged to avoid alignment between the joints of
the layer above and below.
• the front plasterboards layers are fixed using long enough screws
to pass through the lower plasterboard and attach to the steel pro-
file underneath.
1. Plasterboard thickness 12,5 mm
2. Rock wool density up to 100 kg/m³ (optional)
3. Horizontal U-shaped profile
4. Vertical C-shaped profile
5. Self-drilling screw Ø 3,5 X 25 mm
6. Self-drilling screw Ø 3,5 X 35 mm
Light plasterboard vertical walls with steel reinforcement
During testing, light plasterboard walls have been used with the fol-
lowing characteristics:
• U-shaped horizontal metal frame (50 mm) and C-shaped vertical
frame (49 mm) made from 0,6 mm thick sheet metal;
• Vertical profiles placed with a maximum spacing of 312,5 mm
between each other;
• reinforcement sheet;
• Filling made of rock wool with density up to 100 kg/m³ (optional);
• Each side is made from two plasterboard layers 12,5 mm thick, una-
linged to avoid alignment between the joints of the layer above
and below.
The following indications are given for the installation walls:
• metal profiles minimum width: 49 mm;
• metal profiles minimum thickness: 0,6 mm;
• vertical profiles placed with a maximum spacing of 312,5mm
between each other;
• vertical profile fixing with selfthreading screws or by clinching to
the bottom horizontal profile and insertion in the top horizontal
profile;
• profiles fixed using self-threading screws or by clinching on every
intersection.
• installation of a frame around the damper with base and height
where shown in the installation instructions;
• Filling made of rock wool with density up to 100 kg/m³ (optional);
• each side is made from two plasterboard layers 12,5 mm minu-
mum thick, unalinged to avoid alignment between the joints of
the layer above and below.
rev 20-10
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We reserve the right to make changes without prior notice
