Method and means for fire-sealing a penetration for a conduit
AssigneeTelefonaktiebolaget L M Ericsson
InventorsLeif A. Fermvik, Bo E. Ohlsson, Aage E. Skinstad
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Abstract
A fire-seal for a cable penetration is provided with a pre-fabricated fire-sealing body comprising a corrugated tubular casing filled with a pre-compressed fire resisting elastic silicon foam. The body is placed in a site-poured concrete wall before pouring, or in an aerated concrete block from which a fire wall is then built. A tubular tool with a removable tip is driven through the foam so that one or more conduits can be threaded through the tool and foam. The tool is thereafter withdrawn from the foam and opened along an axial slit so that it can be removed transverse to the conduit.
Claims9
A means for fire-sealing a penetration for a conduit through a building part, comprising a cast building member having a prefabricated body comprising a tubular jacket filled with a resilient, fire-resistant foam material, said jacket keeping the foam material compressed transverse to the longitudinal axis of the jacket, said body being intended for placing in the member in conjunction with casting the latter, so that a conduit can be passed through the foam material of the cast-in body.
A method for passing a conduit through a structural member in a manner which inhibits the spreading of fire, comprising the steps of:
- filling a tubular jacket with a resilient fire-resistant foam material such that the foam material is compressed in a direction transverse to the longitudinal axis of the jacket;
- casting the foam-filled jacket in the structural member with its longitudinal axis approximately perpendicular to the opposing surfaces of the structural member;
- and
- passing the conduit through the foam material such that the compressive forces on the material cause it to sealingly engage the conduit.
Dependencies are inferred from the claim text.