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Fire resisting ductwork - tested to BS 476 Part 24. 3rd edition. Volume 2 of 2 - product data sheets (Blue book) (British Standard version)

Fire resisting ductwork - tested to BS 476 Part 24. 3rd edition. Volume 2 of 2 - product data sheets (Blue book) (British Standard version)

Document Status



Core Supplement


Intended to ensure that fire resisting ductwork (including smoke outlet/extraction ductwork) is correctly designed and installed in accordance with current UK legislative requirements. Provides information on current British Standard fire resistance and reaction-to-fire tests, together with recommended methods for appraisal systems for both direct and extended fields of application, and requirements for duct systems incorporating penetration seals, support systems and ancillary items. Identifies limitations in the scope of the guidance and includes data sheets.


Supersedes Fire resisting ductwork - tested to BS 476 Part 24 (Blue book). British Standard version. 2nd edition (ASFP, 2011). See also, "Fire resisting ductwork - classified according to BS EN 13501 Parts 3 and 4 - European version (Blue book). 1st edition. (ASFP, 2009)".


Publisher History

Formed in 1975, the Association for Specialist Fire Protection currently represents the major U.K. based specialist manufacturers and installers of structural passive fire protection systems. They produce technical information to ensure built in fire protection in buildings.



NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.

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