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// CODE SNIPPET

404.6 Enclosure of Atriums

Building Code 2018 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 404 Atriums > 404.6 Enclosure of Atriums
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Atrium spaces shall be separated from adjacent spaces by a 1-hour fire barrier constructed in accordance with Section 707 or a horizontal assembly constructed in accordance with Section 711, or both.
Exceptions:
  1. A fire barrier is not required where a glass wall forming a smoke partition is provided. The glass wall shall comply with all of the following:
    1. Automatic sprinklers are provided along both sides of the separation wall and doors, or on the room side only if there is not a walkway on the atrium side. The sprinklers shall be located between 4 inches and 12 inches (102 mm and 305 mm) away from the glass and at intervals along the glass not greater than 6 feet (1829 mm). The sprinkler system shall be designed so that the entire surface of the glass is wet upon activation of the sprinkler system without obstruction;
    2. The glass wall shall be installed in a gasketed frame in a manner that the framing system deflects without breaking (loading) the glass before the sprinkler system operates; and
    3. Where glass doors are provided in the glass wall, they shall be either self-closing or automatic-closing.
  2. A fire barrier is not required where a glass-block wall assembly complying with Section 2110 and having a 3/4-hour fire protection rating is provided.
  3. A fire barrier is not required between the atrium and the adjoining spaces of up to three floors of the atrium provided that such spaces are accounted for in the design of the smoke control system.
  4. A fire barrier is not required between the atrium and the adjoining spaces where the atrium is not required to be provided with a smoke control system.

Related Code Sections


404.6 Special Detailed Requirements Based on Occupancy and Use, Enclosure of Atriums
Atrium spaces shall be separated from adjacent spaces by a 1-hour fire barrier constructed in accordance with Section 707 or a horizontal ...
Building Code 2018 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 404 Atriums > 404.6 Enclosure of Atriums
404.6 Special Detailed Requirements Based on Occupancy and Use, Enclosure of Atriums
Atrium spaces shall be separated from adjacent spaces by a 1-hour fire barrier constructed in accordance with Section 707 or a horizontal ...
Building Code 2021 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 404 Atriums > 404.6 Enclosure of Atriums
715.1 Fire and Smoke Protection Features, General
dwelling unit . Floors where the joint is protected by a shaft enclosure in accordance with Section 713. Floors within atriums where the space ...
Building Code 2018 of Illinois > 7 Fire and Smoke Protection Features > 715 Fire-Resistant Joint Systems > 715.1 General
1017.3.2 Means of Egress, Atriums
Exit access travel distance for areas open to an atrium shall comply with the requirements of Sections 1017.3.2.1 through 1017.3.2.3 ...
Building Code 2021 of Illinois > 10 Means of Egress > 1017 Exit Access Travel Distance > 1017.3 Measurement > 1017.3.2 Atriums
707.3.6 Fire and Smoke Protection Features, Atriums
The fire-resistance rating of the fire barrier separating atriums shall comply with Section 404.6 ...
Building Code 2021 of Illinois > 7 Fire and Smoke Protection Features > 707 Fire Barriers > 707.3 Fire-Resistance Rating > 707.3.6 Atriums
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