Fire Resistance Level (FRL) is defined in the Building Code of Australia (BCA) now National Construction Code (NCC) is the grading period in minutes for three criteria in accordance with AS1530.4
- Structural adequacy – The time that a structure must be able to with stand during a fire.
- Integrity – The time that a barrier must prevent fire and gases spreading into another compartment.
- Insulation – The time that a service must stop heat transfer through a barrier. Without these criteria being met, combustible materials on the outside of a barrier may ignite and continue the spread of fire.
