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3.3.1.20.(2)
ApplicationIntent
OS1OP1+
ObjectiveOS1 Fire Safety
Attribution
[F02-OS1.3] Applies to the requirement for explosion-relief devices and vents.
Application
Application 1: 
Design, construction and installation of explosion-relief devices and vents for spaces in which substances or conditions that have the potential to create an explosion hazard are present as a result of the principal use of a building.
This applies to buildings described in Sentence 1.3.3.2.(1) of Division A.
Application 2: 
This also applies to:
  • electrical equipment vaults containing dielectric-liquid-filled electrical equipment, as stated in Sentence 3.6.2.7.(5),
  • transformer vaults in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], as stated in Sentence 9.10.1.2.(1),
  • rooms or spaces intended for the storage, manufacture or use of hazardous or explosive material in buildings to which Part 9 applies [see Sentence 1.3.3.3.(1) of Division A for application of Part 9], as stated in Sentence 9.10.1.2.(4), and
  • tents and air-supported structures, as stated in Sentences 3.1.6.1.(1) and 9.10.1.2.(1).
Exceptions: 
except as stated in:
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Intent
Intent 1: 
To limit the probability that an explosion will cause critical damage [structural or mechanical] to a room or building, which could lead to harm to persons in other parts of the building.
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