Page 55 - ICC IEBC 2018
P. 55
ALTERATIONS—LEVEL 2
required exit capacity pro- exceeding three stories in the following loca-
vided by an exit or exits tions:
leading directly out of that 10.1. Buildings protected throughout by an
level without having to tra- approved automatic sprinkler system.
verse another communicat-
ing floor level or be 10.2. Buildings with less than 25 dwelling
exposed to the smoke or units or sleeping units where every
fire spreading from another sleeping room above the second floor
communicating floor level. is provided with direct access to a fire
escape or other approved second exit
4. In Group A occupancies, a minimum 30-minute by means of an approved exterior door
enclosure shall be provided to protect all verti- or window having a sill height of not
cal openings not exceeding three stories. greater than 44 inches (1118 mm) and
5. In Group B occupancies, a minimum 30-minute where both of the following conditions
enclosure shall be provided to protect all verti- are met:
cal openings not exceeding three stories. This 10.2.1. Any exit access corridor
enclosure, or the enclosure specified in Section exceeding 8 feet (2438 mm)
802.2.1, shall not be required in the following in length that serves two
locations:
means of egress, one of
5.1. Buildings not exceeding 3,000 square which is an unprotected
2
feet (279 m ) per floor. vertical opening, shall have
not fewer than one of the
5.2. Buildings protected throughout by an
approved automatic fire sprinkler sys- means of egress separated
tem. from the vertical opening
by a 1-hour fire barrier.
6. In Group E occupancies, the enclosure shall not
be required for vertical openings not exceeding 10.2.2. The building is protected
three stories where the building is protected throughout by an automatic
throughout by an approved automatic fire sprin- fire alarm system, installed
kler system. and supervised in accor-
dance with the Interna-
7. In Group F occupancies, the enclosure shall not tional Building Code.
be required in the following locations:
11. In Group R-2 occupancies, a minimum 30-min-
7.1. Vertical openings not exceeding three ute enclosure shall be provided to protect all
stories.
vertical openings not exceeding three stories.
7.2. Special-purpose occupancies where This enclosure, or the enclosure specified in
necessary for manufacturing opera- Section 802.2.1, shall not be required in the fol-
tions and direct access is provided to lowing locations:
not fewer than one protected stairway.
11.1. Vertical openings not exceeding two
7.3. Buildings protected throughout by an stories with not more than four dwell-
approved automatic sprinkler system. ing units per floor.
8. In Group H occupancies, the enclosure shall not 11.2. Buildings protected throughout by an
be required for vertical openings not exceeding approved automatic sprinkler system.
three stories where necessary for manufacturing 11.3. Buildings with not more than four
operations and every floor level has direct dwelling units per floor where every
access to not fewer than two remote enclosed
stairways or other approved exits. sleeping room above the second floor
is provided with direct access to a fire
9. In Group M occupancies, a minimum 30-minute escape or other approved second exit
enclosure shall be provided to protect all verti- by means of an approved exterior door
cal openings not exceeding three stories. This or window having a sill height of not
enclosure, or the enclosure specified in Section greater than 44 inches (1118 mm) and
802.2.1, shall not be required in the following the building is protected throughout by
locations:
an automatic fire alarm system com-
9.1. Openings connecting only two floor plying with Section 803.4.
levels. 12. One- and two-family dwellings.
9.2. Occupancies protected throughout by 13. Group S occupancies where connecting not
an approved automatic sprinkler sys- more than two floor levels or where connecting
tem.
not more than three floor levels and the struc-
10. In Group R-1 occupancies, the enclosure shall ture is equipped throughout with an approved
not be required for vertical openings not automatic sprinkler system.
36 2018 INTERNATIONAL EXISTING BUILDING CODE ®
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