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716.3 Fire Window Assemblies

Building Code 2018 of Illinois > 7 Fire and Smoke Protection Features > 716 Opening Protectives > 716.3 Fire Window Assemblies

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Fire window assemblies required by other sections of this code shall comply with the provisions of this section.

716.3.1 Testing Requirements

Fire window assemblies shall be constructed of any material or assembly of component materials that conforms to the test requirements of Sections 716.3.1.1 and 716.3.1.2 and the fire protection rating indicated in Table 716.1(3).

716.3.1.1 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.

716.3.1.2 Nonsymmetrical Glazing Systems

Nonsymmetrical fire-protection-rated glazing systems in fire partitions, fire barriers or in exterior walls with a fire separation distance of 10 feet (3048 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.

716.3.2 Performance Requirements

Fire window assemblies shall be installed in the assemblies and comply with the fire protection rating specified in Table 716.1(3).

716.3.2.1 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.

716.3.2.1.1 Where ³/₄-hour-fire-protection window assemblies permitted

Fire-protection-rated glazing requiring 45-minute opening protection in accordance with Table 716.1(3) 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.

716.3.2.1.2 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.

716.3.2.1.3 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 fire partitions requiring ¹/₃-hour opening protection in accordance with Table 716.1(3).

716.3.3 Fire Window Frames

Fire window frames installed with a fire window assembly shall meet the fire-protection rating indicated in Table 716.1(3).

716.3.3.1 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.

716.3.4 Fire-Protection-Rated Glazing

Glazing in fire window assemblies shall be fire protection rated in accordance with this section and Table 716.1(3). 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. 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 ¹/₂-hour fire-resistance-rated partitions is permitted to have a 20-minute fire protection rating.

716.3.4.1 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.

716.3.5 Labeled Protective Assemblies

Glazing in fire window assemblies shall be labeled by an approved agency. The labels shall comply with NFPA 80 and Section 716.3.5.2.

716.3.5.1 Fire Window Frames

Fire window frames shall be approved for the intended application.

716.3.5.2 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 716.1.2.2.2 and Table 716.1(3) that shall be issued by an approved agency and permanently identified on the glazing.