Dow Protected Membrane Roof EN - Manual (Page 24)

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2 3
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" gypsum
Beams or bar joists
Suspended ceiling
Steel deck
5/8" gypsum
Spray cementitious mixture
Beams or bar joists
Steel deck
5/8" Type X gypsum
Spray fiber fireproofing
Beam construction
Steel deck
1/2" or 5/8" 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