• System Number  Building Element  Product  Max Size  FRL System Detail Approved Reference 
    Ceiling 1 60/60/60 RISF Plasterboard ceiling LVH44 500mm x 500mm  60/60/60
    RISF 60 min
    Lightweight clad plenum box BRANZ 4581
    Ceiling 3 60/60/60 RISF Plasterboard ceiling LVH44C Circular  150mm diameter 60/60/60
    RISF 60 min
    Ceiling installation suitable for in-line fans BRANZ FP5859

    FRL: 60/60/60 RISF 60 min 
    Standard Version: AS1530.4 2014