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// CODE SNIPPET

716.6 Fire-Protection-Rated Glazing

Building Code 2015 of Utah > 7 Fire and Smoke Protection Features > 716 Opening Protectives > 716.6 Fire-Protection-Rated Glazing
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Glazing in fire window assemblies shall be fire protection rated in accordance with this section and Table 716.6. Glazing in fire door assemblies shall comply with Section 716.5.8. Fire-protection-rated glazing in fire window assemblies shall be tested in accordance with and shall meet the acceptance criteria of NFPA 257 or UL 9. Fire-protection-rated glazing shall comply with NFPA 80. Openings in nonfire-resistance-rated exterior wall assemblies that require protection in accordance with Section 705.3, 705.8, 705.8.5 or 705.8.6 shall have a fire protection rating of not less than 3/4 hour. Fire-protection-rated glazing in 0.5-hour fire-resistance-rated partitions is permitted to have an 0.33-hour fire protection rating.

TABLE 716.6 FIRE WINDOW ASSEMBLY FIRE PROTECTION RATINGS

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

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.

716.6.1 Testing Under Positive Pressure

NFPA 257 or UL 9 shall evaluate fire-protection-rated glazing under positive pressure. Within the first 10 minutes of a test, the pressure in the furnace shall be adjusted so not less than two-thirds of the test specimen is above the neutral pressure plane, and the neutral pressure plane shall be maintained at that height for the balance of the test.

716.6.2 Nonsymmetrical Glazing Systems

Nonsymmetrical fire-protection-rated glazing systems in fire partitions, fire barriers or in exterior walls with a fire separation distance of 5 feet (1524 mm) or less pursuant to Section 705 shall be tested with both faces exposed to the furnace, and the assigned fire protection rating shall be the shortest duration obtained from the two tests conducted in compliance with NFPA 257 or UL 9.

716.6.3 Safety Glazing

Fire-protection-rated glazing and fire-resistance-rated glazing installed in fire window assemblies shall comply with the safety glazing requirements of Chapter 24 where applicable.

716.6.4 Glass and Glazing

Glazing in fire window assemblies shall be fire-protection-rated glazing installed in accordance with and complying with the size limitations set forth in NFPA 80.

716.6.5 Installation

Fire-protection-rated glazing shall be in the fixed position or be automatic-closing and shall be installed in approved frames.

716.6.6 Window Mullions

Metal mullions that exceed a nominal height of 12 feet (3658 mm) shall be protected with materials to afford the same fire-resistance rating as required for the wall construction in which the protective is located.

716.6.7 Interior Fire Window Assemblies

Fire-protection-rated glazing used in fire window assemblies located in fire partitions and fire barriers shall be limited to use in assemblies with a maximum fire-resistance rating of 1 hour in accordance with this section.

716.6.7.1 Where 3⁄4-Hour Fire Protection Window Assemblies Permitted

Fire-protection-rated glazing requiring 45-minute opening protection in accordance with Table 716.6 shall be limited to fire partitions designed in accordance with Section 708 and fire barriers utilized in the applications set forth in Sections 707.3.6, 707.3.7 and 707.3.9 where the fire-resistance rating does not exceed 1 hour. Fire-resistance-rated glazing assemblies tested in accordance with ASTM E119 or UL 263 shall not be subject to the limitations of this section.

716.6.7.2 Area Limitations

The total area of the glazing in fire-protection-rated window assemblies shall not exceed 25 percent of the area of a common wall with any room.

716.6.7.3 Where 1⁄3-Hour Fire-Protection Window Assemblies Permitted

Fire-protection-rated glazing shall be permitted in window assemblies tested to NFPA 257 or UL 9 in smoke barriers and fire partitions requiring 1/3-hour opening protection in accordance with Table 716.6.

716.6.8 Labeling Requirements

Fire-protection-rated glazing shall bear a label or other identification showing the name of the manufacturer, the test standard and information required in Section 716.3.2 and Table 716.6 that shall be issued by an approved agency and permanently identified on the glazing.
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