Abstract: A fire protection collar for one or more conduits penetrating through openings in fireproof partitions such as walls or ceilings. The fire protection collar includes at least two stable, smoke tight, fireproof coverings of a thermally insulating material sealing the space between the outer surfaces of the partition and the exterior surface of the conduit. A filling of either a plurality of sheets or particles of expanded material, with a thermal conductivity of the same order of magnitude as concrete, essentially fills up the space between the coverings, the conduit and the partition. When the fire protection collar is used for heatproof conduits, the filling is in contact with the exterior surface of the conduit. However, when the fire protection collar is used for conduits which are not heatproof, i.e.

Abstract: An apparatus for containment of fire within ventilation ducts in a building. To this end, a lattice consisting of highly thermally conductive material, such as expanded metal, is placed in the cross section of the ventilation duct, the lattice then conducting the heat to the walls of the ventilation duct and is thereby able to prevent or delay the passage of the flames. Since such a lattice becomes fouled during operation of ventilation system, it must be easy to replace and clean. For this reason, it is recommended that the particle filling, in the form of bulk expanded metal balls, be placed on a rigid midplane consisting of transverse supports or perforated plates, etc.