8.2 Buildings with Mezzanine Floors

8.2.1 Where reservoir limitations are required below
the mezzanine as part of the design, the
parameters given in 8.1 above should be applied.
When the design philosophy applied is to allow
the smoke to spill into an adjoining area, care
must be taken not to exceed the total reservoir
size of 2000 to 3000m² maximum.
The size of the reservoir is the combined total
of the under mezzanine floor smoke control zone
plus the area of the smoke control zone into
which the smoke is designed to flow.