2.4.7.3.(2)

Objective

OS1 Fire Safety

Attribution

(a) and (c)[F81-OS1.1]

Intent

Intent 1:

To limit the probability that inadequate airtightness of manhole covers will lead to the accumulation and subsequent ignition of flammable sewer gases in occupied space, which could lead to harm to persons.

Intent 2:

To limit the probability that inadequate venting will lead to a pressure buildup of flammable sewer gases in manholes, which could lead to ignition of the gases from a nearby ignition source, which could lead to harm to persons.

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