For Groups A-1, A-2, and A-3, an automatic sprinkler system is mandated for occupancy exceeding how many people?

The requirement for an automatic sprinkler system in occupancy classifications such as A-1, A-2, and A-3 is based on the threshold of 300 people. This threshold is established to ensure adequate fire safety measures are in place for larger gatherings where the potential risk increases significantly. Sprinkler systems are effective in controlling and extinguishing fires, which is crucial in environments with high occupant loads.

Therefore, when an occupancy reaches or exceeds 300 persons, the installation of an automatic sprinkler system becomes necessary to protect the safety of individuals in the event of a fire. This requirement is specified in various building and fire codes, aligning with life safety provisions to minimize risks in crowded public spaces. The figures for other thresholds (100, 200, or 400) do not align with the established standards that denote when a sprinkler system is mandated for these specific occupancies.