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3.1.9.2.(1)
OS1+OP1
Application
Application 1: 
Combustibility of pipes, ducts, electrical outlet boxes, totally enclosed raceways or other similar service equipment that penetrate an assembly required to have a fire-resistance rating and that have been incorporated in the assembly at the time of testing, in buildings described in Sentence 1.3.3.2.(1) of Division A.
Exceptions: 
except:
  • as stated in Article 3.1.9.3., which applies to certain wires and cables in noncombustible raceways or embedded in a concrete floor slab, certain cables of limited diameter, certain ungrouped cables, and combustible outlet boxes, and
  • as stated in Article 3.1.9.4., which applies to combustible sprinkler, water distribution, drain, waste and vent piping.
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Intent
Intent 1: 
To exempt service equipment from the requirement to be noncombustible if certain testing has been conducted on the assemblies with the equipment installed, on the basis that the testing demonstrates that combustible service equipment will not reduce the structural integrity of the assembly in a fire condition.
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