CA1127862A - Method and means for fire-sealing a penetration for a conduit - Google Patents
Method and means for fire-sealing a penetration for a conduitInfo
- Publication number
- CA1127862A CA1127862A CA347,731A CA347731A CA1127862A CA 1127862 A CA1127862 A CA 1127862A CA 347731 A CA347731 A CA 347731A CA 1127862 A CA1127862 A CA 1127862A
- Authority
- CA
- Canada
- Prior art keywords
- conduit
- jacket
- foam material
- fire
- foam
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Abstract
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 The tool is thereafter withdrawn from the foam and opened along an axial slit so that it can be removed transverse to the conduit.
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 The tool is thereafter withdrawn from the foam and opened along an axial slit so that it can be removed transverse to the conduit.
Description
6~2 , A METHOD AND ~ANS FOR ~IRE-SEALING A PENETRATION ~OR A
CONDUIT
The invention relates to a method of fire-sealing a penetration for a conduit such as an electric cable, through a bu~ilelinge5picsr7~ co~prising a cast buiLding member, an ~elastic ~hH~ u~E foam material being arranged in the penetration. The invelltion also relates to a means for carrying out the method.
Penetrations, that is the holes in walls or floors enaLling the passage of electric cables, pipes, vcntilat-ion ducts or other building elements from one room to another, are always a great hazard in connection with fire, since they constitute obvious propagation paths for both smoke and flames. It is therefore of decisive impor-tance for fire safcty that the penetrations are sealed in a way which effectively prevents tlle spread of both smoke and fire. The pelletration is usually provided by arranging a recess in a l~all or the like during pouring or bricklaying etc. Alternatively, a penetration can be cut out in the ready-cast or built-up wall. At a later building stage, conduits are taken tllrough these penetrations and the . . . ~
7~
penetration is fire-sealcd, i.e. ~the free space between the conduits and tl~e wall of the penetration is filled with a fireproof filler.
It is l~nown to fix a clamping frame in the penetration.
This frame is filled with a plurality of parallelepipedic blocks. At least some of these b-locks are parted and have semicircular cavities facing towards each other for accom-modating a conduit. The cylindrical space between thcse block halvcs is fille~ out with a cylinclrical sealing body which can also be removed to make room for a conduit.
By clamping, the frame affords the desired tight engagement between the blocks and the conduits. The disadvantage with SUC]I a clamping frame is, however, that tlle blocks provi- ~;
ded only afford a seal for ccrtain cable or conduit dimen--~ 15 sions and for a certain l~umbe~ of cables. In turn, this e c~S c~ G( J~ ~ Jc~ g 12 has resulted in~that wllell supplementary cables are laid througll such a framc, a complete block is removed so that the seal betweell the cablc and the adjacellt blocksis no longer effective. Furthermore, it has often been observed in conjunction with handling that blocks have been lost and have not been replaced, the ~iresealed penetration tllus llaving through openings which nullify the fire resisting function of the device.
It is also known to utilize ru~ber grom~nets to seal a cable p~netration (cf. British Patent 953,869), a tubu-lar rubber stopper being pressed into the penetra~ion, and a group of cables then being forced through the hole in the stopper. Such a technique is not particularly usable for fire-sealing purposes~ since the cables must usually 1~27~62 be pulled a long distance through the stopper, and a new penetration must be arranged and a new stopper provided if a further cable group is to be taken through the wall.
An in situ moulding teclmique has therefore been adopted, which involves placing the cables or conduits in the penetration and temporarily - sealing the penetration by shuttering, subsequent to which a fire-resistant silicon rubber is foamed on site in the penetration. ~lis technique is accounted for by Studsvik Energiteknik AB under the designation "Fire-sealing system FC-225", utili~ing a silicon foam which is commercially available under the designation Dow Corning 3-6548 RTV. However, if it is subsequently desired to lay a conduit through a wall, for example, a further penetration for it should be made, e.g. in an existing wall and a sealing of the penetration using the FC-225-technique. This is difficult, especially if the wall is concrete, and expensive, not in the least with regard to wall coverings such as panelling and wallpaper, which are often damaged and must be replaced.
Alternatively, a hole can be drillecl in a fire seal in an existing penetration, the annular gap between the hole and cable being sealed aEter laying the cable.
One object of the invention is therefore to provide a new technique for fire-sealing penetrations, where the above-mentioned disadvantages have been considerably reduced or eliminated.
In accordance with the invention, this object is achieved by 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 . ~ .
, ~ :
,~, ..:
,:
~7~
member; and passing the conduit through the foam material such that the compressive forces on the material cause it to sealingly engage the conduit.
The conduit may be passed through the foam material of the cast-in body e.g. by driving a substantially tubular mandrel, with its forward end provided with a conical tip, through the body, exposing the central cavity of the mandrel, e.g. by removing the driving tip, threading the conduit through the mandrel and withdrawing the mandrel from the body so that the foam material resiliently comes into sealing engagement agains the conduit, the tubular wall of the mandrel then being opened to remove the tool from the conduit transversely thereto. A tool for passing the conduit through the body thus comprises, for example, a substantially tubular, axially slit mandrel with a conical driving tip removably Eitted to the forward end of the tool.
In the inventive method it is thus possible to utilize bodies which can be produced in a factory in circumstances where the foaming conditions can be controlled easily and well. The bodies can be produced in lengths corre-sponding to the thickness of the building members ~2~36~
in w}licll thcy ale to be cast, e.g. nerated concrete blocks, such as Siporex ~ blocks, or wall modules, or so-called flooring planks made from concrete or aerated concrete.
Alternativel~, the bodies can be manu:Eactured and supplied in continuous lengths, so that such a length can be sawn on site to a suitable length for placing in a l~all or a floor which is cast in concrete on site.
Ihe inventive means for carrying out the method in-cludes a prefabricated body comprising a tubular jacket filled with an elastic fire-resistant foam material, known per se, and which keeps the foam material compressed t~
,.~ transverse~the longitudinal axis of the jacket, said body heirg intended :Eor casting into the member. A conduit can be passed through the foam material o the cast-in body, e.g. with -the help of the tool described above.
Tlle jacket oE the body is suitably made for form--locked retention in the cast building member, and the jacket wa:lL can the]l be corrugated in th~ longitudinal di-rection of the jacket. rhe jacket can consist o~ a materi-al with low heat conductivity, such as a plasti~ material.
- B)~ tlle invelltive method, and ~ith the aid o~ the in-ventive firesealing body, building parts can be prepared for simplified conduit layilig through the building part.
Accorcling to a irst aspect of the invention, the body can be cast into a building member such as an aerated concrete block. I~1hell n wall is to be buil-t up from SUCll blocks, the wall can be provided at selected places with blocks provided with the inventive bodies. According to a second aspect oE the invention, as previously mentioned, , ;; : ' 78~,~
~j tl~e l-ocly can he placed in a concrcte ~vall before it is conventionally cast in situ.
By means of the technique discussed, the erected building parts will have satisfactorylfire resistance ~no S open penetrations) directly after being finished. The fire-resis-tant foam materials useful for the bodies have high density and a hlgh proportion of closed pores, thereby providing satisfactory sound insulatia--for the penetrat-ions. The cast-in bodies can be easily penctrated, as re-quired, with the aid of thc tool described above, so thata further conduit can easily be laid through the pene-tration in such a way that it will be immediately sealed against :Eire in the penetration.
In the ~ollowing, the invention will be described in the form of an example with reference to the accompanying dra~ing.
Iig. 1 is all end viel~ of a fire-sealing body in accordclnce with the invelltion.
Fig. 2 is a section along the line II-II in Fig. l.
Fig. 3 illustrates a building part in the form of a wall l~hich has been built up l~ith tlle help of building members including a fire-sealing body in accordance with the invention.
lig. 4 is an axial sectioll through the inventive~
bocly, as cast-in in a building member or a building part, the m.lterial surroundillg tlle body formillg a "penetra-tioll"
for a conduit.
Figs. 5 - 8 are sections corresponding to that in Fig. 4, and illustrate the sequence of work oper~tions, using a nenetrating tool Eor laying a conduit through the foam material oF the body cast into the building member.
Figs. 1 and 2 show an axially corrugated jacket 28 made from a thermoplastic~ such as polyethene, for example.
The interior of the jacket 28 is filled with a fire-resist-ant silicon foam material, foamed in situ in the jacket so that the cured foam 8 is pre-compressed by the jacket 28.
! In the factory production of building member 7 (see Iig. 3) SUC]I as aerated concrete, the body defined by the jacke~ 28 and Eoam 8 can be cast into such a member.
; Building members 7 provided with such cast-in bodies 8,28 can be utilized together with ordinary building members 7' for constructing a building par-t 27, such as a separating wall in a building. ~ building member 7 with bodies 8, 28 can thus be laid in positions where there is reason to believe that Eireproof penetratio]ls for cables l~ill be neecled in the future.
As indicated in Fig. ~, a body 8, 28, in accordance with the invention, can also be cast~ in building parts on site, such as concrete walls, the peripheral portions o~ the body 8, 28 in the building part 27 defin-ing a penetration 17. The :Eoam 8 is suitably produced by a s:i:l.:i.con :roalll COIIllllCl'Ci.;lll.y ava.ilalllc unclcr ~ c dcsi~llat-iOII l)ow Corning 3-~548 R'rV, this :Eoam suitably being roalllc(l on si-te in tlle jacket 28 while complying Wit]l tlle instructions in the Dow Corning publication FC-225.
Fig. 5 is a section corresponding -to tllat in Fig. 4, bu~ also shows a tool for laying a conduit through the .. .
.
, ' ~ ' :
~, ~
.. . -:
7~ 2 foam ll)aterial 8. 'I'hc tool comprises a substantially tubu-lar mandrel 1 having an axial slit 3. At tlle driving end of the mandrel 1 there is a removable conical driving tip
CONDUIT
The invention relates to a method of fire-sealing a penetration for a conduit such as an electric cable, through a bu~ilelinge5picsr7~ co~prising a cast buiLding member, an ~elastic ~hH~ u~E foam material being arranged in the penetration. The invelltion also relates to a means for carrying out the method.
Penetrations, that is the holes in walls or floors enaLling the passage of electric cables, pipes, vcntilat-ion ducts or other building elements from one room to another, are always a great hazard in connection with fire, since they constitute obvious propagation paths for both smoke and flames. It is therefore of decisive impor-tance for fire safcty that the penetrations are sealed in a way which effectively prevents tlle spread of both smoke and fire. The pelletration is usually provided by arranging a recess in a l~all or the like during pouring or bricklaying etc. Alternatively, a penetration can be cut out in the ready-cast or built-up wall. At a later building stage, conduits are taken tllrough these penetrations and the . . . ~
7~
penetration is fire-sealcd, i.e. ~the free space between the conduits and tl~e wall of the penetration is filled with a fireproof filler.
It is l~nown to fix a clamping frame in the penetration.
This frame is filled with a plurality of parallelepipedic blocks. At least some of these b-locks are parted and have semicircular cavities facing towards each other for accom-modating a conduit. The cylindrical space between thcse block halvcs is fille~ out with a cylinclrical sealing body which can also be removed to make room for a conduit.
By clamping, the frame affords the desired tight engagement between the blocks and the conduits. The disadvantage with SUC]I a clamping frame is, however, that tlle blocks provi- ~;
ded only afford a seal for ccrtain cable or conduit dimen--~ 15 sions and for a certain l~umbe~ of cables. In turn, this e c~S c~ G( J~ ~ Jc~ g 12 has resulted in~that wllell supplementary cables are laid througll such a framc, a complete block is removed so that the seal betweell the cablc and the adjacellt blocksis no longer effective. Furthermore, it has often been observed in conjunction with handling that blocks have been lost and have not been replaced, the ~iresealed penetration tllus llaving through openings which nullify the fire resisting function of the device.
It is also known to utilize ru~ber grom~nets to seal a cable p~netration (cf. British Patent 953,869), a tubu-lar rubber stopper being pressed into the penetra~ion, and a group of cables then being forced through the hole in the stopper. Such a technique is not particularly usable for fire-sealing purposes~ since the cables must usually 1~27~62 be pulled a long distance through the stopper, and a new penetration must be arranged and a new stopper provided if a further cable group is to be taken through the wall.
An in situ moulding teclmique has therefore been adopted, which involves placing the cables or conduits in the penetration and temporarily - sealing the penetration by shuttering, subsequent to which a fire-resistant silicon rubber is foamed on site in the penetration. ~lis technique is accounted for by Studsvik Energiteknik AB under the designation "Fire-sealing system FC-225", utili~ing a silicon foam which is commercially available under the designation Dow Corning 3-6548 RTV. However, if it is subsequently desired to lay a conduit through a wall, for example, a further penetration for it should be made, e.g. in an existing wall and a sealing of the penetration using the FC-225-technique. This is difficult, especially if the wall is concrete, and expensive, not in the least with regard to wall coverings such as panelling and wallpaper, which are often damaged and must be replaced.
Alternatively, a hole can be drillecl in a fire seal in an existing penetration, the annular gap between the hole and cable being sealed aEter laying the cable.
One object of the invention is therefore to provide a new technique for fire-sealing penetrations, where the above-mentioned disadvantages have been considerably reduced or eliminated.
In accordance with the invention, this object is achieved by 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 . ~ .
, ~ :
,~, ..:
,:
~7~
member; and passing the conduit through the foam material such that the compressive forces on the material cause it to sealingly engage the conduit.
The conduit may be passed through the foam material of the cast-in body e.g. by driving a substantially tubular mandrel, with its forward end provided with a conical tip, through the body, exposing the central cavity of the mandrel, e.g. by removing the driving tip, threading the conduit through the mandrel and withdrawing the mandrel from the body so that the foam material resiliently comes into sealing engagement agains the conduit, the tubular wall of the mandrel then being opened to remove the tool from the conduit transversely thereto. A tool for passing the conduit through the body thus comprises, for example, a substantially tubular, axially slit mandrel with a conical driving tip removably Eitted to the forward end of the tool.
In the inventive method it is thus possible to utilize bodies which can be produced in a factory in circumstances where the foaming conditions can be controlled easily and well. The bodies can be produced in lengths corre-sponding to the thickness of the building members ~2~36~
in w}licll thcy ale to be cast, e.g. nerated concrete blocks, such as Siporex ~ blocks, or wall modules, or so-called flooring planks made from concrete or aerated concrete.
Alternativel~, the bodies can be manu:Eactured and supplied in continuous lengths, so that such a length can be sawn on site to a suitable length for placing in a l~all or a floor which is cast in concrete on site.
Ihe inventive means for carrying out the method in-cludes a prefabricated body comprising a tubular jacket filled with an elastic fire-resistant foam material, known per se, and which keeps the foam material compressed t~
,.~ transverse~the longitudinal axis of the jacket, said body heirg intended :Eor casting into the member. A conduit can be passed through the foam material o the cast-in body, e.g. with -the help of the tool described above.
Tlle jacket oE the body is suitably made for form--locked retention in the cast building member, and the jacket wa:lL can the]l be corrugated in th~ longitudinal di-rection of the jacket. rhe jacket can consist o~ a materi-al with low heat conductivity, such as a plasti~ material.
- B)~ tlle invelltive method, and ~ith the aid o~ the in-ventive firesealing body, building parts can be prepared for simplified conduit layilig through the building part.
Accorcling to a irst aspect of the invention, the body can be cast into a building member such as an aerated concrete block. I~1hell n wall is to be buil-t up from SUCll blocks, the wall can be provided at selected places with blocks provided with the inventive bodies. According to a second aspect oE the invention, as previously mentioned, , ;; : ' 78~,~
~j tl~e l-ocly can he placed in a concrcte ~vall before it is conventionally cast in situ.
By means of the technique discussed, the erected building parts will have satisfactorylfire resistance ~no S open penetrations) directly after being finished. The fire-resis-tant foam materials useful for the bodies have high density and a hlgh proportion of closed pores, thereby providing satisfactory sound insulatia--for the penetrat-ions. The cast-in bodies can be easily penctrated, as re-quired, with the aid of thc tool described above, so thata further conduit can easily be laid through the pene-tration in such a way that it will be immediately sealed against :Eire in the penetration.
In the ~ollowing, the invention will be described in the form of an example with reference to the accompanying dra~ing.
Iig. 1 is all end viel~ of a fire-sealing body in accordclnce with the invelltion.
Fig. 2 is a section along the line II-II in Fig. l.
Fig. 3 illustrates a building part in the form of a wall l~hich has been built up l~ith tlle help of building members including a fire-sealing body in accordance with the invention.
lig. 4 is an axial sectioll through the inventive~
bocly, as cast-in in a building member or a building part, the m.lterial surroundillg tlle body formillg a "penetra-tioll"
for a conduit.
Figs. 5 - 8 are sections corresponding to that in Fig. 4, and illustrate the sequence of work oper~tions, using a nenetrating tool Eor laying a conduit through the foam material oF the body cast into the building member.
Figs. 1 and 2 show an axially corrugated jacket 28 made from a thermoplastic~ such as polyethene, for example.
The interior of the jacket 28 is filled with a fire-resist-ant silicon foam material, foamed in situ in the jacket so that the cured foam 8 is pre-compressed by the jacket 28.
! In the factory production of building member 7 (see Iig. 3) SUC]I as aerated concrete, the body defined by the jacke~ 28 and Eoam 8 can be cast into such a member.
; Building members 7 provided with such cast-in bodies 8,28 can be utilized together with ordinary building members 7' for constructing a building par-t 27, such as a separating wall in a building. ~ building member 7 with bodies 8, 28 can thus be laid in positions where there is reason to believe that Eireproof penetratio]ls for cables l~ill be neecled in the future.
As indicated in Fig. ~, a body 8, 28, in accordance with the invention, can also be cast~ in building parts on site, such as concrete walls, the peripheral portions o~ the body 8, 28 in the building part 27 defin-ing a penetration 17. The :Eoam 8 is suitably produced by a s:i:l.:i.con :roalll COIIllllCl'Ci.;lll.y ava.ilalllc unclcr ~ c dcsi~llat-iOII l)ow Corning 3-~548 R'rV, this :Eoam suitably being roalllc(l on si-te in tlle jacket 28 while complying Wit]l tlle instructions in the Dow Corning publication FC-225.
Fig. 5 is a section corresponding -to tllat in Fig. 4, bu~ also shows a tool for laying a conduit through the .. .
.
, ' ~ ' :
~, ~
.. . -:
7~ 2 foam ll)aterial 8. 'I'hc tool comprises a substantially tubu-lar mandrel 1 having an axial slit 3. At tlle driving end of the mandrel 1 there is a removable conical driving tip
2, and at it~ rear end there are radial flange elements 6.
The tool is driven througll the body 8 in the direction indicated by the arrow, until the tip 2 has come outside the foam material 8. A conduit 9 can thereaEter be passed througll the central cavity of the portion l as inclicated ~ ig. 6, tlle removable tip 2 being knocked from the end of the portion l by means of the conduit 9. The conduit 9 can thereafter be passed through for a desired length, the radial flange elements 6 preventing the portion 1 from beir.g pulled through the foam body 8 by friction against the conduit 9.
I`he portion l is then l~ithdrawn, as inclicated in Fig. 7, the foam material 8 resiliently returning to seal-ing engagement against the conduit 9. I~llen the portion l is completely removed :Erom tlle ~oam bocly 8, the axial slit 3 oE the portion can be widened manualLy so that the portion can be removed from the conduit transverse to the conduit, as indicated in Fig. 8. The portion 1 preferably has a hinge 4 opposite the slit 3 to facilita~e opening it.
By "conduit" is here intended an electric cable, a pipC, a VCllti l;lt:iOlI duct or tlle li~e. Ille e~l~re~sio "conduit'l can naturally also embrace a group of said members, e.g. a gl'OUp Or elCCtl`iC C.ll)1CS.
The tool is suitably made from an electrically in-U1atillg Illaterial such as a plastic~ material, ancl pre-ferably one having low friction against the silicon foam ;
~27~
.
body 8, polytetrafluo-roethylene conceivably being a suitable material for the portion 1 of the tool.
The inventive fire-sealin~ body can have substantial ly optional cross sectional shape. The cross section of the body is preferably circular, but s~uare, rectangular or oval shapes are also conceivable, for example.
By keeping the foam compressed in the jacket two ad-vantages are l~on, namely that the foam expands and fills out the penetration, should the jacket be destroyed by fire or should the penetration cross-section be enlarged due to e.g. heat expansion, and that the foam offers a good grip against the conduits, preventing easy pull-out of the concluits from the penetration.
~ ' . ' ; ' ~; ~ `
The tool is driven througll the body 8 in the direction indicated by the arrow, until the tip 2 has come outside the foam material 8. A conduit 9 can thereaEter be passed througll the central cavity of the portion l as inclicated ~ ig. 6, tlle removable tip 2 being knocked from the end of the portion l by means of the conduit 9. The conduit 9 can thereafter be passed through for a desired length, the radial flange elements 6 preventing the portion 1 from beir.g pulled through the foam body 8 by friction against the conduit 9.
I`he portion l is then l~ithdrawn, as inclicated in Fig. 7, the foam material 8 resiliently returning to seal-ing engagement against the conduit 9. I~llen the portion l is completely removed :Erom tlle ~oam bocly 8, the axial slit 3 oE the portion can be widened manualLy so that the portion can be removed from the conduit transverse to the conduit, as indicated in Fig. 8. The portion 1 preferably has a hinge 4 opposite the slit 3 to facilita~e opening it.
By "conduit" is here intended an electric cable, a pipC, a VCllti l;lt:iOlI duct or tlle li~e. Ille e~l~re~sio "conduit'l can naturally also embrace a group of said members, e.g. a gl'OUp Or elCCtl`iC C.ll)1CS.
The tool is suitably made from an electrically in-U1atillg Illaterial such as a plastic~ material, ancl pre-ferably one having low friction against the silicon foam ;
~27~
.
body 8, polytetrafluo-roethylene conceivably being a suitable material for the portion 1 of the tool.
The inventive fire-sealin~ body can have substantial ly optional cross sectional shape. The cross section of the body is preferably circular, but s~uare, rectangular or oval shapes are also conceivable, for example.
By keeping the foam compressed in the jacket two ad-vantages are l~on, namely that the foam expands and fills out the penetration, should the jacket be destroyed by fire or should the penetration cross-section be enlarged due to e.g. heat expansion, and that the foam offers a good grip against the conduits, preventing easy pull-out of the concluits from the penetration.
~ ' . ' ; ' ~; ~ `
Claims (9)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. 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.
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.
2. The method of claim 1 wherein the step of passing the conduit through the foam material comprises:
inserting a tubular mandrel through the foam material to thereby provide a passage therethrough;
passing the conduit through the mandrel; and removing the mandrel from the foam material to thereby allow the foam material to come into sealing engagement with the conduit
inserting a tubular mandrel through the foam material to thereby provide a passage therethrough;
passing the conduit through the mandrel; and removing the mandrel from the foam material to thereby allow the foam material to come into sealing engagement with the conduit
3. A method as claimed in claim 1, characterized in that the body is cut off in a length corresponding to the thickness of the building member before it is cast into said member.
4. 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.
5. A means as claimed in claim 4, characterized in that the jacket is designed for form-locked retention when cast in the member.
6. A means as claimed in claim 5, characterized in that the jacket wall is corrugated in the longitudinal direction of the jacket.
7. A means as claimed in claim 4, characterized in that the jacket consists of a material having low heat conductivity.
8. A means as claimed in claim 4, characterized in that the body has a circular cross sectional shape.
9. A means as claimed in claim 4, characterized in that the body has a rectangular cross sectional shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA347,731A CA1127862A (en) | 1980-03-14 | 1980-03-14 | Method and means for fire-sealing a penetration for a conduit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA347,731A CA1127862A (en) | 1980-03-14 | 1980-03-14 | Method and means for fire-sealing a penetration for a conduit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1127862A true CA1127862A (en) | 1982-07-20 |
Family
ID=4116479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA347,731A Expired CA1127862A (en) | 1980-03-14 | 1980-03-14 | Method and means for fire-sealing a penetration for a conduit |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1127862A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2489659A (en) * | 2011-01-28 | 2012-10-10 | David John Penrose | Cable feeder through cavity wall |
-
1980
- 1980-03-14 CA CA347,731A patent/CA1127862A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2489659A (en) * | 2011-01-28 | 2012-10-10 | David John Penrose | Cable feeder through cavity wall |
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