- Fire Resistance Level ("FRL")
Australian Standard AS 1530.4 defines Fire Resistance Level ("FRL") by three measurements, measured in minutes as;
- structural adequacy is the ability of a structure to maintain its stability and load bearing capacity during a fire;
- integrity is the ability to resist the transfer of flames and hot gases from part to another; and
- insulation is the ability to contain temperatures and stop heat transfer between zones.
FRL is denoted as in the form (Structural Adequacy / Integrity / Insulation) measured in minutes.
For example a wall with a FRL of (90/90/90) has following attributes;
- Structural Adequacy = 90 Minutes
- Integrity = 90 Minutes
- Insulation = 90 minutes