The relative complexity of any ductwork system passing through different fire compartments and the relevance of the system’s function in ambient
as well as fire conditions can make the selection of a suitable ductwork system difficult.
Fire performance requirements of ductwork and a wide range of solutions for the protection of steel ductwork and for self-supporting systems using
PROMATECT®-H, and PROMATECT®-L500
are provided in this section.
For particularly onerous conditions where high impact strength is required or for use in aggressive environments, Promat has developed a range of
systems using PROMATECT®-S high impact board.
General Design Considerations
Factors which should be considered when determining the correct specification to ensure a ductwork system will provide the required fire performance include:
Required fire exposure
Required fire performance
Supporting structure
Hanger support
Steel ductwork
Penetration through walls/floors
Movement joints
Air flow & leakage
Ductwork functions
Others such as acoustics performance, thermal insulation, water tolerance, strength, etc.
Performance requirements and approvals can be different from country to country. It is therefore strongly advisable that you check with your local
Promat office to ensure an particular system has the relevant approvals in place for your specific location.
Ductwork Category
Most ductwork systems can fall into one or more of the following categories:
Ventilation and air conditioning
Natural smoke extract
Fan assisted smoke extract
Pressurisation of escape routes and fire fighting
lobbies
