Statutes, codes, and regulations
Code of Massachusetts Regulations
Department 780 CMR - STATE BOARD OF BUILDING REGULATIONS AND STANDARDSChapter 10 - Means of Egress
Section 1021 - NUMBER OF EXITS AND CONTINUITY
Subsection 1021.2 - Single exits

780 CMR, 1021.2

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Current through Register 1533, October 25, 2024
Subsection 1021.2 - Single exits

Only one exit shall be required from Group R-3 occupancy buildings or from stories of other buildings as indicated in Table 1021.2. Occupancies shall be permitted to have a single exit in buildings otherwise required to have more than one exit if the areas served by the single exit do not exceed the limitations of Table 1021.2. Mixed occupancies shall be permitted to be served by single exits provided each individual occupancy complies with the applicable requirements of Table 1021.2 for that occupancy. Where applicable, cumulative occupant loads from adjacent occupancies shall be considered in accordance with the provisions of Section 1004.1. Basements with a single exit shall not be located more than one story below grade plane.

TABLE 1021.2 STORIES WITH ONE EXIT

STORYOCCUPANCYMAXIMUM OCCUPANTS (OR DWELLING UNITS)
PER FLOOR AND TRAVEL DISTANCE
First story or basementA, Bd, Ee, Fd, M, U, Sd49 occupants and 75 feet travel distance
H-2, H-3 3 occupants and 25 feet travel distance
H-4, H-5, I, R 10 occupants and 75 feet travel distance
Sa29 occupants and 100 feet travel distance
Second story Bb, F, M, Sa29 occupants and 75 feet travel distance
R-2 4 dwelling units and 50 feet travel distance
Third storyR-2c4 dwelling units and 50 feet travel distance

For SI: 1 foot = 304.8 mm.
a. For the required number of exits for parking structures, see Section 1021.1.2.
b. For the required number of exits for air traffic control towers, see Section 412.3.
c. Buildings classified as Group R-2 equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2 and provided with emergency escape and rescue openings in accordance with Section 1029.
d. Group B, F and S occupancies in buildings equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 shall have a maximum travel distance of 100 feet.
e. Day care occupancies shall have a maximum occupant load of 10.

780 CMR, 1021.2