Installation in a structural floor
Installation of dampers in a structural floor should be done according to figures no. 12, 13. The minimum
thickness of the horizontal floor partition is 150 mm. The following guidelines should be noted each time:
• the dampers should be installed in the embedded ventilation ducts, previously set in the ceiling opening
with a dimension 50 mm greater than the nominal diameter of the duct;
• the sealing of the duct-floor joint must be made with fire resistant materials (e.g. concrete, mortar) and
it must be tight, without any gaps, etc. When installing the duct, care must be taken not to deform it so
that it retains its nominal size at each point;
• plan the damper installation in the duct in such a way that the fire-protection blade of the damper in its
closed position be located as close to the floor symmetry axis as possible;
• the direction of installation of the fire damper is not important;
• special care should be taken not to deform the fire dampers duct and to ensure correct operation, both,
before and after installation of the dampers;
Fig. 12 FDA-BU, fire damper. - dimensions of the sealing of the duct-partition system.
1 - Steel ventilation duct; 2 - Concrete, mortar or fireproof gypsum;
3 - FDA-BU fire damper; 4 - Concrete floor with a density of 2200±200kg/m
3
or above.
Fig. 13. Installation of the FDA-BU damper in the floor.
27
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FDA-BU