Does this count as a 'leaf' i.e. contribute to a triple leaf system

[peter1908]

I understand that a layer of drywall counts as a leaf....but I can't find clear indication as to whether the floor of the level above (where I want my rehearsal room) - which is a hardwood floor nailed/glued to tongue-groove chipboard flooring - count as a 'leaf' - when
a) it is so heavy
b) it is 10" away from the draywall leaf below it (the current ceiling downstairs)
c) the airspace between the ceilling drywall and this wooden floor is broken up by the joists and cross-pieces.
d) that airspace is full of sound insulation batts

Indeed, if the 'airspace' between two sheets of drywall is full of insulation - do those two sheets counts as 1 leaf or 2?

Thank you

Peter

 

[RICK FITZPATRICK]

.but I can't find clear indication as to whether the floor of the level above (where I want my rehearsal room) - which is a hardwood floor nailed/glued to tongue-groove chipboard flooring - count as a 'leaf' -

Hi Peter. Yes, it does. Any assembly that is a Mass Air Mass system is a 2 leaf system. The floor just doesn't know it is a leaf.