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2.6.1.4.(3)
OP1OS1OS3OS3
ObjectiveOS3 Safety in Use
Attribution
Application
Application 1: 
Replacement or repair of chimneys, flues and flue pipes with:
  • any structural deficiency or decay, and
  • abandoned or unused openings which are not effectively sealed in a manner that would prevent the passage of fire or smoke.
This applies to buildings.
Application 2: 
This also applies to vents for quench tanks, as stated in Sentence 5.4.6.2.(1).
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Intent
Intent 1: 
To limit the probability that structural deficiency or decay of chimneys, flues and flue pipes or abandoned or unused openings will lead to the spread of products of combustion from normal operation to other parts of the building, which could lead to harm to persons.
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