Ventilation Ductwork should be tested for Type A (fire outside) and Type B (fire inside) to BS 476 part 24 for a specified time of Stability, Integrity and Insulation (if required).
Ventilation ducts that cross an escape corridor are deemed escape route ducts and in accordance with BS9999:2008, clause 33.4.2, escape route ventilation ducts must be fire rated.
Ventilation ductwork used as part of a pressurisation system must be fire rated and tested as Type A and Type B. Typically used to protected stairways, lobbies, corridors and firefighting shafts, a pressurisation system will provide a positive pressure in defined compartments to prevent smoke entering from adjacent areas. Pressurisation ducts must be able to maintain an air supply to the defined areas for the specified time limits, as defined in terms of Stability and Integrity.
Air supply must be maintained, fire dampers cannot be used.
Fire resisting ductwork may prove to be a cost effective alternative to fire dampers in general ductwork systems (particularly over the lifetime of a building).
|System Description||Material||Stability & Integrity||Insulation|
|Ventilation / Pressurisation||Galvanised Mild Steel||Up to 4 Hours||Up to 2 Hours*|
*Insulation values are obtained through the application of specific insulation
TRUSTED BY THE INDUSTRY
Our professional approach and continual investment in the training of our staff, technology systems and manufacturing plant ensure you receive the very best product and service. We are ISO 9001:2015 compliant and Investors in People accredited to 2020. Manufacturing to the highest quality control standards. With our internal factory production control (FPC) being maintained by our own skilled and experienced sheet metal fabricators, which is regularly audited by BRE Global and Applus Laboratories.
Considerate to the environment
Non-Coated galvanised fire rated ductwork has significant commercial and environmental savings over systems using intumescent or flame-retardant coatings that require energy and chemicals to degrease, etch, prime, paint and dry. Our systems also alleviate the inherent problems of damaging these coatings during logistics, assembly and installation, which compromises the fire resistance of a secondary coated system.
Supply Only Non Coated Fire Rated Ductwork:
- Rectangular duct up to 3000mm square
- Circular duct up to 1250mm diameter
- Special construction duct up to 8m longest side
- Horizontal and vertical orientations
- Available in Galvanised, Mild & Stainless Steel
- Conventional or Fully Welded construction
- Tested for ‘Fire Outside’ & ‘Fire Inside’ scenarios
- Fire rated Access Doors
- Fire rated Silencers
- Bespoke design for ductwork support systems
All fire rated ducting is manufactured to the CASWELL FIRESAFE® specification. Email us now to obtain a quote for your requirements.
The system was developed and tested in the early 2000’s in accordance with BS476 Part 24 (1987). In recent years further, development and testing in accordance with EN1366 Part 1 (2013) to meet European legalisation including CE marking.
The product is tested to BS 476-24 (1987) and EN 1366-1 (2013) for up to 4 hours stability and integrity and up to 4 hours insulation (fire outside duct) and 2 hours insulation (fire inside duct).
Email us now to obtain a quote for your requirements.