Sentence 3.2.7.10.(1)

Intent 1:

To limit the probability that smoke and toxic gases will accumulate in a fire situation, which could lead to delays or inefficiencies in emergency response operations [e.g. poor visibility], which could lead to the spread of fire to other parts of the building, which could lead to harm to persons, including emergency responders.

Intent 2:

To limit the probability that smoke and toxic gases will accumulate in a fire situation, which could lead to delays in egress by emergency responders [e.g. poor visibility], which could lead to harm to emergency responders.