1018.2 Buildings With One Exit

  1. Buildings described in Table 1018.2, provided that the building has not more than one level below the first story above grade plane.

  2. Buildings of Group R-3 occupancy.

  3. Single-level buildings with the occupied space at the level of exit discharge provided that the story or space complies with Section 1014.1 as a space with one means of egress.

  4. Buildings of Group R-2 occupancy where all of the following conditions are met:

  4.1. The building does not exceed four stories;

  4.2. The building contains not more than three dwelling units per story;

  4.3. The building is of construction Type I or II;

  4.4. The building does not exceed 2,500 square feet (232 m²) per story;   4.5. Each dwelling unit has at least one window facing the street, or facing a lawful yard with open, unobstructed, and direct access to the street;

  4.6. The stairway extends to the roof surface through a stairway bulkhead complying with Section 1509.2 provided the roof has a slope not steeper than 20 degrees. In lieu of the stairway bulkhead, the stair may be constructed against the street wall with one window facing the street at every landing and access to the roof is provided via a scuttle with a stationary, noncombustible access ladder;

  4.7. The stairway is enclosed in two-hour fire-rated walls with all exit doors leading into the stairway having at least 1¹/₂ hour fire-rating; and

  4.8 The building shall be equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.2.

  5. Buildings of Group R-2 occupancy of construction Type I or II not exceeding six stories and not exceeding 2,000 square feet (186 m²) per story.