Dow Protected Membrane Roof EN - Manual (Page 25)

Assembly #
P-229, P-505, P-507
(New PMR)
®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
§ StrataGuard is a trademark of Owens Corning
§§ DensDeck is a trademark of Georgia-Pacific
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2 4
ULC Hourly Fire
Resistance Ratings for
PMR – Concrete Deck
Rating (hrs)
1, 1-1/2
Description
2' poured gypsum deck
Bar joists
Suspended ceiling
FM Hourly Fire Resistance
Ratings for PMR
FM Class 1 Fire and
Wind Uplift
Note: Current FM wind tests cannot be used to evaluate loose-applied
roofing systems. FM Loss Prevention Guide 1-29 provides accepted
ballasting requirements.
Assembly #
RC-227
(New PMR)
RC-264
(New PMR)
Rating (hrs)
1
1
Description
Steel deck
1/2" Type X gypsum
Gypsum board ceiling
Steel deck
1/2" Type X gypsum
Suspended ceiling
Class
1-60, 1-90
Description
Steel deck
1/2" StrataGuard
§ or 5/8" DensDeck §§
(mechanically fastened)
3-ply BUR
Conditions, Issues and Ratings
F I R E A N D W I N D R A T I N G S