Page 172 - 2015_Bldg Code

FIRE AND SMOKE PROTECTION FEATURES

the assigned fire protection rating shall be the shortest 716.6.7.2 Area limitations. The total area of the glaz-
duration obtained from the two tests conducted in compli- ing in fire-protection-rated window assemblies shall
ance with NFPA 257 or UL 9. not exceed 25 percent of the area of a common wall
with any room.
716.6.3 Safety glazing. Fire-protection-rated glazing and
fire-resistance-rated glazing installed in fire window 716.6.7.3 Where 1/3-hour fire-protection window
assemblies shall comply with the safety glazing require- assemblies permitted. Fire-protection-rated glazing
ments of Chapter 24 where applicable. shall be permitted in window assemblies tested to
NFPA 257 or UL 9 in smoke barriers and fire parti-
716.6.4 Glass and glazing. Glazing in fire window assem- tions requiring 1/3-hour opening protection in accor-
blies shall be fire-protection-rated glazing installed in dance with Table 716.6.
accordance with and complying with the size limitations
set forth in NFPA 80. 716.6.8 Labeling requirements. Fire-protection-rated
glazing shall bear a label or other identification showing
716.6.5 Installation. Fire-protection-rated glazing shall be the name of the manufacturer, the test standard and infor-
in the fixed position or be automatic-closing and shall be mation required in Section 716.3.2 and Table 716.6 that
installed in approved frames. shall be issued by an approved agency and permanently
identified on the glazing.
716.6.6 Window mullions. Metal mullions that exceed a
nominal height of 12 feet (3658 mm) shall be protected SECTION 717
with materials to afford the same fire-resistance rating as DUCTS AND AIR TRANSFER OPENINGS
required for the wall construction in which the protective
is located. 717.1 General. The provisions of this section shall govern
the protection of duct penetrations and air transfer openings
716.6.7 Interior fire window assemblies. Fire-protec- in assemblies required to be protected and duct penetrations
tion-rated glazing used in fire window assemblies located in nonfire-resistance-rated floor assemblies.
in fire partitions and fire barriers shall be limited to use in
assemblies with a maximum fire-resistance rating of 1 717.1.1 Ducts and air transfer openings. Ducts transi-
hour in accordance with this section. tioning horizontally between shafts shall not require a
shaft enclosure provided that the duct penetration into
716.6.7.1 Where 3/4-hour fire protection window each associated shaft is protected with dampers complying
assemblies permitted. Fire-protection-rated glazing with this section.
requiring 45-minute opening protection in accordance
with Table 716.6 shall be limited to fire partitions 717.1.2 Ducts that penetrate fire-resistance-rated
designed in accordance with Section 708 and fire barri- assemblies without dampers. Ducts that penetrate fire-
ers utilized in the applications set forth in Sections resistance-rated assemblies and are not required by this
707.3.6, 707.3.7 and 707.3.9 where the fire-resistance section to have dampers shall comply with the require-
rating does not exceed 1 hour. Fire-resistance-rated ments of Sections 714.2 through 714.3.3. Ducts that pene-
glazing assemblies tested in accordance with ASTM trate horizontal assemblies not required to be contained
E119 or UL 263 shall not be subject to the limitations within a shaft and not required by this section to have
of this section.

TABLE 716.6
FIRE WINDOW ASSEMBLY FIRE PROTECTION RATINGS

TYPE OF WALL REQUIRED WALL MINIMUM FIRE FIRE-RATED
ASSEMBLY ASSEMBLY RATING WINDOW ASSEMBLY GLAZING MARKING

Interior walls (hours) RATING (hours) W-XXXb
Fire walls W-XXXb
All NPa W-XXXb
Fire barriers >1 NPa OH-45 or W-60
1 NPa
Incidental use areas (Section 707.3.7), 1 3/4 OH-45 or W-60
Mixed occupancy separations (Section 707.3.9) OH-20 or W-30
1 3/4 OH-45 or W-60
Fire partitions 0.5 1/3 OH-90 or W-XXXb
1 3/4 OH-45 or W-60
Smoke barriers >1 11/2 OH-20 or W-30
1 3/4 Not Applicable
Exterior walls 0.5 1/3
All NP
Party wall

NP = Not Permitted.
a. Not permitted except fire-resistance-rated glazing assemblies tested to ASTM E119 or UL 263, as specified in Section 716.2.
b. XXX = The fire rating duration period in minutes, which shall be equal to the fire-resistance rating required for the wall assembly.

2015 INTERNATIONAL BUILDING CODE® 143

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