Look at it from the perspective of the goal intended of the thermal
barrier then wave that PE wand in discussing equivalencies. To be
honest, I am amazed on the focus and concern about fire extending
into the wall cavity for a life safety system when there is nothing
restricting it from extending into the adjacent OCCUPIED room.
Roland
On Apr 11, 2008, at 2:41 PM, Todd Williams - FPDC wrote:
This is not a fire rating, but a thermal barrier. The question as I
see it is would the mineral wool provide the thermal barrier? The R
value (thermal resistance) for 1/2" sheetrock is 0.30. The R values
for mineral wool is 3.7 per inch. The thickness if the wool will be
3/4" or greater. So my thought is that it would meet the criteria.
Am I out of line here?
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