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A single exit or access to a single exit shall be permitted from spaces, any story or any occupied roof where one of the following conditions exists:
  1. The occupant load, number of dwelling units and exit access travel distance do not exceed the values in Table 804.4.1.1(1) or Table 804.4.1.1(2).
  2. In Group R-1 or R-2, buildings without an approved automatic sprinkler system, individual single-story or multiple-story dwelling or sleeping units shall be permitted to have a single exit or access to a single exit from the dwelling or sleeping unit provided one of the following criteria are met:
    2.1.  The occupant load is not greater than 10 and the exit access travel distance within the unit does not exceed 75 feet (22 860 mm).
    2.2.  The building is not more than three stories in height; all third-story space is part of dwelling with an exit access doorway on the second story; and the portion of the exit access travel distance from the door to any habitable room within any such unit to the unit entrance doors does not exceed 50 feet (15 240 mm).
  3. In buildings of Group R-2 occupancy of any number of stories with not more than four dwelling units per floor served by an interior exit stairway; with a smokeproof enclosure in accordance with Sections 909.20 and 1023.12 of the International Building Code or an exterior stairway as an exit; and where the portion of the exit access travel distance from the dwelling unit entrance door to the exit is not greater than 20 feet (6096 mm).
STORIES WITH ONE EXIT OR ACCESS TO ONE EXIT FOR R-2 OCCUPANCIES
STORY OCCUPANCY MAXIMUM NUMBER OF DWELLING UNITS MAXIMUM EXIT ACCESS TRAVEL DISTANCE (feet)
Basement, first or second story above grade plane R-2a 4 dwelling units 50
Third story above grade plane and higher NP NA NA
For SI: 1 foot = 304.8 mm.
NP = Not Permitted.
NA = Not Applicable.
  1. Group R-2, without an approved automatic sprinkler system and provided with emergency escape and rescue openings in accordance with Section 1031 of the International Building Code.
STORIES WITH ONE EXIT OR ACCESS TO ONE EXIT FOR OTHER OCCUPANCIES
STORY OCCUPANCY MAXIMUM OCCUPANT LOAD PER STORY MAXIMUM EXIT ACCESS TRAVEL DISTANCE (feet)
First story above or below grade plane B, F-2, S-2a 35 75
Second story above grade plane B, F-2, S-2a 35 75
Third story above grade plane and higher NP NA NA
For SI: 1 foot = 304.8 mm.
NP = Not Permitted.
NA = Not Applicable.
  1. The length of exit access travel distance in a Group S-2 open parking garage shall be not more than 100 feet.

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