Dow Protected Membrane Roof EN - Manual (Page 22)

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2 2
ULI Hourly Fire
Resistance Ratings for
PMR – Concrete Deck
Assembly #
P-904, P-909,
P-912, P-915
(Retrofit PMR)
P-904, P-909,
P-912, P-915
(New PMR)
Rating (hrs)
2
2
Description
Precast concrete units
Mineral fiberboard
Precast concrete units
1" (25 mm) gypsum board
ULI Hourly Fire
Resistance Ratings for
PMR – Other
Assembly #
P-229, P-505, P-507
(New PMR)
Rating (hrs)
1, 1-1/2
Description
2" (50 mm) poured gypsum deck
Bar joists
Suspended ceiling
Conditions, Issues and Ratings
F I R E A N D W I N D R A T I N G S