Specifications - fire resistant collars
1.
General
Fire resistant collars prohibit the propagation of fire through combustible pipes in walls or floors with
a fire resistance. An aperture may not influence the fire resistance of the structural element,
according the prevailing law. The fire collars are tested according to EN 1366-3 and classified
according to EN 13501-2.
The fire collars may be installed in/on a
- flexible wall  100mm thickness (2x12,5mm GKF + rock wool 40mm  40kg/m³ + 2x12,5mm GKF)
- rigid wall  100mm thickness
- rigid floor  150mm thickness
The classification overview summarizes the approved solutions with indication of the type of
wall/floor, the specifications of the combustible pipe with their wall thickness, and the sealing or
fixation method. The fire resistance of the fire collars (up to 180’) is available on www.rft.be.
2.
Description and functioning
The fire resistant collars are available in both cast-in (MG2), as in surface-mounted version (MG2-A).
In the event of fire, the expanding material inside the collar (graphite based) is activated and
strangles the pipe, thus closing off the apertures and making them fire resistant.
3.
Installation
The MG2 fire collar is cast into the wall/floor thickness around the combustible pipe. Provide an
installation opening that is 50mm larger than the outer diameter of the fire collar and seal with
mortar (floor) or plaster (wall).
The surface-mounted fire collar is installed around the combustible pipe and fixed with universal
screws, or with expander bolts in case of armed concrete. A fire collar is placed on both sides of the
wall. For a ceiling/floor, a single MG2-A is on the bottom side of the floor is sufficient.
4.
Specifications
Cast-in MG2:
-
Aesthetic and invisible finishing
No room is lost at the wall crossing
Simple installation
Standard tools and sealing
“Zero distance” allowed
Extensive field of application
Maintenance-free
Future-proof
Surface-mounted MG2-A:
-
Simple and rapid fixation with standard
screws
Minimal collar height for a superior
flexibility
Standard tools, no sealing
“Zero distance” allowed
Oblique penetration  30° allowed
Extensive field of application
Maintenance-free
Ideal for renovation works
Future-proof
Rf-Technologies N.V./S.A. - Lange Ambachtstraat 40, B-9860 Oosterzele -www.rft.be - info@rft.be