Rytons A1® Fire-rated Compartment Ducts
Non-combustible sleeves for fire-separating elements
Compartment (fire): A building or part of a building, comprising one or more rooms, spaces or storeys, that is constructed to prevent the spread of fire to or from another part of the same building or an adjoining building. NOTE: A roof space above the top storey of a compartment is included in that compartment.
Fire-separating element: A compartment wall, compartment floor, cavity barrier and construction that encloses a protected escape route and/or a place of
special fire hazard.
Approved Document B: Fire safety (Volume 1: Dwellings)
Air circulation systems
2.9 b. Any duct passing through the stair enclosure should be rigid steel.
NOTE: Ventilation ducts passing through compartment walls should comply with the guidance in Section 9.
Openings in other compartment walls, or in compartment floors
7.20 Openings should be limited to those for any of the following …
b. Pipes, ventilation ducts, service cables, chimneys, appliance ventilation ducts or ducts encasing one or more flue pipes, complying with the provisions in Section 9.
Sleeves for pipes passing through a fire-separating element
9.5 A pipe with a maximum nominal internal diameter of 160mm may be used with a sleeve made out of a high melting point metal. A high melting point metal means any metal (such as cast iron, copper or steel) which, if exposed to a temperature of 800°C, will not soften or fracture to the extent that flame or hot gas will pass through the wall of the pipe.
As a leading manufacturer of A1 fire-rated ventilation products, including a range of compartment ducts, here are the questions we are most frequently asked about ducting compartments and fire-separating elements.
1) Does the compartment duct have to be metal? A compartment should be constructed of fire resistant materials, including ducting.
2) Can plastic ducting be connected to metal compartment ducting? Plastic ducting can be connected to metal compartment ducting clear of the compartment area.
3) Can an intumescent block be installed in a metal compartment duct? We do not recommend the installation of an intumescent fire block in a Rytons galvanised steel compartment duct. We recommend installing intumescent fire blocks/pipe wraps on plastic ductwork that is clear of the compartment area.
- Fire resistant ducting for safe zones and hazardous areas e.g., corridors, lift shafts and plant rooms.
- Round and rectangular options – 110mm x 54mm, 204mm x 60mm, 220mm x 90mm, 100mm diameter, 125mm diameter and 150mm diameter.
- Made from A1 classified, non-combustible, rigid galvanised steel.
- Available with or without plastic ducting connectors.
- No limits – bespoke size compartment ducts available via Rytons A1SPECIAL service.
- No on-site assembly required.
- Duct supplied with factory fixed joints and seals.
Galvanised steel. Maintains structural integrity when exposed to a temperature of 800ºC.
Easy to specify with NBS Source.
Easy to order.
Easy to handle on site.
A requirement for high-rise relevant buildings over 18m high (11m in Scotland) and buildings undergoing unsafe cladding remediation work.
For further information, or to discuss Rytons A1® Fire-rated Compartment Ducts, please do not hesitate to call our technical sales office on 01536 511874 or email admin@rytons.com.
