Page 235 - 2018_IFC

CONSTRUCTION REQUIREMENTS FOR EXISTING BUILDINGS

installed in accordance with Section 903.3, and 2110 of the International Build-
3
all of the following conditions are met: ing Code and having a / -hour
4
fire protection rating is pro-
2.1. For other than existing approved atriums
with a smoke control system, where the vided.
atrium was constructed and is maintained 2.3. Where doors are provided in the glass
in accordance with the code in effect at wall, they shall be either self-closing or
the time the atrium was created, the automatic-closing and shall be con-
atrium shall have a smoke control system structed to resist the passage of smoke.
that is in compliance with Section 909.
3. In Group I-3 occupancies, exit stairways or
2.2. Glass walls forming a smoke partition or ramps and exit access stairways or ramps con-
a glass-block wall assembly shall be per- structed in accordance with Section 408 in the
mitted where in compliance with Condi- International Building Code.
tion 2.2.1 or 2.2.2.
1103.4.2 Three to five stories. In other than Group I-2
2.2.1. Glass walls forming a smoke and I-3 occupancies, interior vertical openings connecting
partition shall be permitted three to five stories shall be protected by either 1-hour fire-
where all of the following condi- resistance-rated construction or an automatic sprinkler
tions are met: system shall be installed throughout the building in accor-
dance with Section 903.3.1.1 or 903.3.1.2.
2.2.1.1. Automatic sprinklers
are provided along Exceptions:
both sides of the sep- 1. Vertical opening protection is not required for
aration wall and Group R-3 occupancies.
doors, or on the room
side only if there is 2. Vertical opening protection is not required for
not a walkway or open parking garages.
occupied space on the 3. Vertical opening protection for escalators shall be
atrium side. in accordance with Section 1103.4.5, 1103.4.6 or
1103.4.7.
2.2.1.2. The sprinklers shall
be not more than 12 4. Exit access stairways and ramps shall be in
inches (305 mm) accordance with Section 1103.4.8.
away from the face 1103.4.3 More than five stories. In other than Group I-2
of the glass and at and I-3 occupancies, interior vertical openings connecting
intervals along the more than five stories shall be protected by 1-hour fire-
glass of not greater resistance-rated construction.
than 72 inches (1829
mm). Exceptions:
1. Vertical opening protection is not required for
2.2.1.3. Windows in the glass
wall shall be non- Group R-3 occupancies.
operating type. 2. Vertical opening protection is not required for
open parking garages.
2.2.1.4. The glass wall and win-
dows shall be installed 3. Vertical opening protection for escalators shall be
in a gasketed frame in a in accordance with Section 1103.4.5, 1103.4.6 or
manner that the fram- 1103.4.7.
ing system deflects 4. Exit access stairways and ramps shall be in
without breaking (load- accordance with Section 1103.4.8.
ing) the glass before the
sprinkler system oper- 1103.4.4 Atriums and covered malls. In other than
ates. Group I-2 and I-3 occupancies, interior vertical openings
in a covered mall building or a building with an atrium
2.2.1.5. The sprinkler system shall be protected by either 1-hour fire-resistance-rated
shall be designed so construction or an automatic sprinkler system shall be
that the entire surface installed throughout the building in accordance with Sec-
of the glass is wet tion 903.3.1.1 or 903.3.1.2.
upon activation of the
sprinkler system Exceptions:
without obstruction. 1. Vertical opening protection is not required for
Group R-3 occupancies.
2.2.2. A fire barrier is not required
where a glass-block wall assem- 2. Vertical opening protection is not required for
bly complying with Section open parking garages.

202 2018 INTERNATIONAL FIRE CODE ®
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