The Building Code of Australia in Part C3 Protection of Openings clause, C3.12 ‘Openings in floors and ceilings for services’ and C3.15 ‘Openings for service installations’ sets the parameters for when openings in floors and walls are to be protected and then specifies how these openings are to be protected. Fire dampers are designed to seal penetrations that are used for air movement from a fire resistant shaft or from one fire compartment to another. All fire dampers are nominated as an essential safety measure.
Building Code of Australia
Clause C3.15 (b) Ventilation and air-conditioning requires fire dampers to be installed in accordance with AS/NZS 1668.1:1998 “The use of ventilation and air-conditioning in buildings – Fire and smoke control in multi-compartment buildings under a building permit”.
Fire dampers can either be fully mechanical or composite and constructed with intumescent material. When in contact with heat intumescent swells many times its original thickness to form a solid barrier to fire in the opening containing fire dampers.
The following photographs depict fire dampers installed in a building.