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CONSTRUCTION REQUIREMENTS FOR EXISTING BUILDINGS

2. Twenty-three inches (584 mm) between a 1105.4 Incidental uses in existing Group I-2. Incidental
stepped aisle handrail and seating where a uses associated with and located within existing single-occu-
stepped aisle does not serve more than five pancy or mixed-occupancy Group I-2 buildings and that gen-
rows on one side. erally pose a greater level of risk to such occupancies shall
3. Twenty inches (508 mm) between a stepped aisle hand- comply with the provisions of Sections 1105.4.1 through
rail or guard and seating where the aisle is subdivided 1105.4.3.2.1. Incidental uses in Group I-2 occupancies are
by a mid-aisle handrail. limited to those listed in Table 1105.4.
4. Forty-two inches (1067 mm) for level or ramped aisles 1105.4.1 Occupancy classification. Incidental uses shall
having seating on both sides. not be individually classified in accordance with Section
302.1 of the International Building Code. Incidental uses
Exceptions:
shall be included in the building occupancies within which
1. Thirty-six inches (914 mm) where the aisle they are located.
serves fewer than 50 seats.
1105.4.2 Area limitations. Incidental uses shall not
2. Thirty inches (760 mm) where the aisle serves occupy more than 10 percent of the building area of the
fewer than 15 seats and does not serve as part story in which they are located.
of an accessible route.
1105.4.3 Separation and protection. The incidental uses
5. Thirty-six inches (914 mm) for level or ramped aisles listed in Table 1105.4 shall be separated from the remain-
having seating on only one side. der of the building or equipped with an automatic sprin-
Exception: Thirty inches (760 mm) for catchment kler system, or both, in accordance with the provisions of
areas serving not more than 60 seats and not serving that table.
as part of an accessible route. 1105.4.3.1 Separation. Where Table 1105.4 specifies a
6. In Group I-2, where aisles are used for movement of fire-resistance-rated separation, the incidental uses
patients in beds, aisles shall comply with Section shall be separated from the remainder of the building in
1105.6.7. accordance with Section 509.4.1 of the International
Building Code.
1104.24 Stairway floor number signs. Existing stairways
shall be marked in accordance with Section 1023.9. 1105.4.3.2 Protection. Where Table 1105.4 permits an
automatic sprinkler system without a fire-resistance-
1104.25 Egress path markings. Existing high-rise buildings
of Group A, B, E, I, M and R-1 occupancies shall be provided rated separation, the incidental uses shall be separated
with luminous egress path markings in accordance with Sec- from the remainder of the building by construction
tion 1025. capable of resisting the passage of smoke in accordance
with Section 509.4.2 of the International Building
Exception: Open, unenclosed stairwells in historic build- Code.
ings designated as historic under a state or local historic
preservation program. 1105.4.3.2.1 Protection limitation. Except as other-
wise specified in Table 1105.4 for certain incidental
uses, where an automatic sprinkler system is pro-
SECTION 1105 vided in accordance with Table 1105.4, only the
CONSTRUCTION REQUIREMENTS space occupied by the incidental use need be
FOR EXISTING GROUP I-2 equipped with such a system.
1105.1 General. Existing Group I-2 shall meet all of the fol- 1105.5 Corridor construction. In Group I-2, in areas hous-
lowing requirements: ing patient sleeping or care rooms, corridor walls and the
opening protectives therein shall provide a barrier designed to
1. The minimum fire safety requirements in Section 1103.
resist the passage of smoke in accordance with Sections
2. The minimum mean of egress requirements in Section 1105.5.1 through 1105.5.7.
1104.
1105.5.1 Materials. The walls shall be of materials per-
3. The additional egress and construction requirements in mitted by the building type of construction.
Section 1105.
1105.5.2 Fire-resistance rating. Unless required else-
Where the provisions of this chapter conflict with the con- where in this code, corridor walls are not required to have
struction requirements that applied at the time of construc- a fire-resistance rating. Corridor walls that were installed
tion, the most restrictive provision shall apply. as fire-resistance-rated assemblies in accordance with the
1105.2 Applicability. The provisions of Sections 1105.3 applicable codes under which the building was con-
through 1105.8, 1105.10 and 1105.11 shall apply to the exist- structed, remodeled or altered shall be maintained unless
ing Group I-2 fire area. modified in accordance with the International Existing
Building Code.
1105.3 Construction. Group I-2, Condition 2 shall not be
located on a floor level higher than the floor level limitation
in Table 1105.3 based on the type of construction.

2018 INTERNATIONAL FIRE CODE ® 211
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