The provisions of Section 1027 of IBC are adopted by reference with the following modifications:
1. Revise Section 1027.2 to read:
"1027.2 Use in a means of egress.
Exterior exit stairways shall not be used as an element of a required means of egress for Group I-2 occupancies. For occupancies in other than Group I-2, exterior exit stairways and exterior exit ramps shall be permitted as an element of a required means of egress for levels not more than 45 feet (13.7 m) above grade adjacent to the exterior exit stairway.
1027.2.1 Limitation.
Not more than 50 percent of the number and minimum width or required capacity of means of egress components shall be provided using exterior exit stairways or exterior exit ramps.
Exceptions:
1. Means of egress components only serving an occupiable rooftop.
2. Means of egress components only serving occupancies that are open to the atmosphere, such as open parking garages or Group A-5 occupancies.
3. Means of egress components serving a single basement, the first story above grade plane, or the second story above grade plane."
2. Revise Section 1027.5 to read:
"1027.5 Location.
Exterior exit stairways and exterior exit ramps shall have a minimum separation distance of 10 feet (3048 mm) measured at right angles from the exterior edge of the stairway or ramps, including landings, to:
1. The closest abutting property line.
2. The far side of a public way.
3. The exterior walls of other buildings on the same lot with openings that are not protected in accordance with Section 705 based on fire separation distance.
Exceptions:
1. Exterior exit stairways, porches and exterior exit ramps serving not more than 4 stories or occupiable rooftops in Group R-2, R-3 and R-5 occupancies shall have a minimum separation distance of 3 feet (914 mm) if constructed of combustible materials; a separation distance is not required for exterior exit stairways, porches and exterior exit ramps constructed of entirely noncombustible materials.
2. On any side of an exterior exit stairway or exterior exit ramp protected by a solid wall with a fire- resistance rating of at least one hour that extends at least 3 feet (914 mm) beyond the exterior edge of adjacent sides and 8 feet (2438 mm) above the highest landing, the separation distance may be reduced to 3 feet (914 mm).
3. Exterior exit stairways and exterior exit ramps serving occupiable rooftops above portions of buildings not more than two stories above grade plane shall have a minimum separation distance of 5 feet (1525 mm).
4. Exterior exit stairways and ramps serving occupiable rooftops above portions of buildings not more than one story above grade plane and not more than 15 feet (4572 mm) above adjoining grade are not required to have a separation distance."
3. Revise exception 1 to Section 1027.6 to read:
"1. Separation from the interior of the building is not required for occupancies, other than Group R-1, in buildings that are not more than two stories above grade plane where a level of exit discharge serving such occupancies is the first story above grade plane.
4. Revise exception 2 to Section 1027.6 by deleting "approved."
5. Revise exception 4 to Section 1027.6 to read:
"4. In Group R-2, R-3, and R-5 occupancies not more than four stories above grade plane, exterior exit stairways and exterior exit ramps are not required to be separated from the interior of the building and openings are not limited where the exterior exit stairway or exterior exit ramp discharges directly to grade."
(Amend Coun. J. 2-19-20, p. 14473, Art. II, § 51; Amend Coun. J. 1-26-22, p. 43756, Art. II, § 10)