If a stair structure is supporting the fire barriers that enclose the exit enclosure, does the stair structure have to be fire rated as well?
Looking specifically at IBC 2018 Section 707.5.1 and NFPA 101 (2018) Section 188.8.131.52.
If there is a fire inside a stair, the means of egress is no longer usable and at that point are you protecting the interior of the building from the fire inside the exit enclosure?
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