Dow Protected Membrane Roof EN - Manual (Page 23)

§ StrataGuard is a trademark of Owens Corning
§§ DensDeck is a trademark of Georgia-Pacific
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ULC Hourly Fire Resistance Ratings for PMR –
Metal Deck
Assembly #
R-202, R-217
(New PMR)
R-702, R-703
(New PMR)
R-804
(New PMR)
R-805, R-806
(New PMR)
Rating (hrs)
1
1, 1-1/2
3/4, 1, 1-1/2,
2, 3
1
Description
Steel deck
1/2" (13 mm) gypsum
Beams or bar joists
Suspended ceiling
Steel deck
5/8" (16 mm) gypsum
Spray cementitious mixture
Beams or bar joists
Steel deck
5/8" (16 mm) Type X gypsum
Spray fiber fireproofing
Beam construction
Steel deck
1/2" or 5/8" (13 mm or 16 mm)
Type X gypsum (varies)
Spray fiber fireproofing
Beams or bar joists
Conditions, Issues and Ratings
F I R E A N D W I N D R A T I N G S
Assembly #
P-229, P-505, P-507
(New PMR)
ULC Hourly Fire Resistance Ratings for PMR –
Concrete Deck
Rating (hrs)
1, 1-1/2
Description
2" (50 mm) 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" (13 mm) Type X gypsum
Gypsum board ceiling
Steel deck
1/2" (13 mm) Type X gypsum
Suspended ceiling
Class
1-60, 1-90
Description
Steel deck
1/2" (13 mm) StrataGuard
§ or 5/8" (16 mm)
DensDeck §§
(mechanically fastened)
3-ply BUR