Firestop
- Fire stop is a seal provided to close an imperfection of fit or any joint between elements, components or construction in a building so as to prevent and restrict penetration of smoke and flame through that imperfection or joint.
- Fire-stopping. Sealing products that take up imperfections of fit or design tolerance between the fire-resisting fixed elements of a building to restrict the passage of fire and smoke. They continue to take up any imperfections of fit at all times and have the same fire rating as the fixed elements of which they form a part and/ or interface.
- A seal provided to close an imperfection of fit or design tolerance between elements or components, to restrict the passage of fire and smoke.
Materials
Suitable fire stopping materials include:
- Proprietary fire stopping and sealing systems which have been shown by test to maintain the fire resistance of the wall or other element, subject to approval by the Relevant Authority.
- Other fire-stopping materials include:
- Cement mortar
- Gypsum based plaster;
- Cement or gypsum based vermiculite/ perlite mizes;
- Glass fibre, crushed rock, blast furnace slag or ceramic based products (with or without resin binders), and
- Intumescent mastics.
| Types of Openings | Applicable firestop |
| Horizontal cable tray penetration | Mortars, Plugs/ blocks |
| Horizontal pipe penetration | Pipe closures (plastic pipe only)
Sealant (metal pipes only) |
| Sealing of blank opening | Mortars,Plugs/ blocks, Coated batts |
| Horizontal multiple penetration | Mortars, Plugs/ blocks, Coated batts |
| Cable penetration | Mortar, Coated batts, Foam, Sealants |
| Vertical duct penetration | Mortar, Mineral fibre and sealant/ mastic |
| Vertical pipe penetration | Pipe closures (plastic pipes only)
Sealants (metal pipes only) |
| Multiple penetration (vertical and horizontal) | Mortar
Coated batts Pipe closures (plastic pipes only) Plugs/ blocks |
| Vertical and horizontal cable penetration | Mortar
Coated batts |
| Movement joints | Sealants
Preformed elastomeric seals Mineral fibre and sealant/ mastic |
| Horizontal duct penetration | Mortar
Mineral fibre and sealant/ mastic |
| Fire (including cavity) barrier | Coated batts
Mineral wool curtains Woven textiles Boards |
Images
References
- Handbook on Fire Precautions in Buildings by Fire Safety & Shelter Department Singapore Civil Defence Force
- https://en.wikipedia.org/wiki/Firestop
- www.asfp.org.uk
- The Building Regulations 2010 Fire safety https://www.gov.uk/government
