Revise and replace section R311.2: Egress Doors as follows:
R311.2: Egress Doors: A primary and secondary egress door shall be provided for each dwelling unit and shall be as remote as possible from each other. The primary egress door shall be side-hinged and shall provide a clear width of not less than 32 inches (813 mm) where measured between the face of the door and the stop, with the door open 90 degrees (1.57 rad). The secondary egress door shall be side-hinged or sliding, and for side-hinged secondary egress doors shall provide a clear width of not less than 28 inches (711 mm) where measured between the face of the door and the stop with the door open 90 degrees (1.57 rad). Sliding secondary egress door clear width may be slightly less than 28 inches (711 mm) to conform to industry fabrication standards. The clear height of secondary egress door openings shall not be less than 78 inches (1,981 mm) in height measured from the top of the threshold to the bottom of the stop. Other exterior doors shall not be required to comply with these minimum dimensions. Egress doors shall be capable of being readily opened from the inside of the dwelling without the use of a key or special knowledge or effort. Add section R311.2.1 as follows:
R311.2.1Interior Doors. All doors providing access to habitable rooms shall have a minimum nominal width of 30 inches (762 mm) and a minimum nominal height of 78 inches (1,981 mm). Exceptions:
1. Doors providing access to bathrooms are permitted to be 28 inches (711 mm) in nominal width.2. Doors providing access to bathrooms in existing buildings are permitted to be 24 inches (610 mm) in nominal width. Revise and replace section R311.3.1 Floor elevations at the required egress doors - Exception as follows:
Exception: The landing or floor on the exterior side shall be not more than 8 1/4 inches (210 mm) below the top of the threshold provided that the door does not swing over the landing or floor.
780 CMR, ch. 51, ch. 3, R301, 301.1, 311.2
Amended by Mass Register Issue 1532, eff. 10/11/2024.