780 CMR, 1009.8
Current through Register 1533, October 25, 2024
Curved stairways with winder treads shall have treads and risers in accordance with Section 1009.4 and the smallest radius shall not be less than twice the required width of the stairway.
Exception: The radius restriction shall not apply to curved stairways for occupancies in Group R-3 and within individual dwelling units in occupancies in Group R-2.
780 CMR, 1009.8