13R 2019 states "6.6.9.2 Sprinklers shall not be required underneath stair risers in dwelling units where the walls and ceilings are surfaced with noncombustible or limited-combustible finishes."
I do not see a similar statute in 13D. Is there a reason for this? What is your practice for addressing sprinklers under the stair risers in 13D systems? Thanks, Anthony
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