// DEFINITION

Atrium

Building Code 2021 of Illinois > 2 Definitions > 202 Definitions

[BG] ATRIUM. A vertical space that is closed at the top, connecting two or more stories in Group I-2 and I-3 occupancies or three or more stories in all other occupancies.

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Related Code Sections

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

Section 404 Special Detailed Requirements Based on Occupancy and Use, Atriums

or structures containing vertical openings defined as "Atriums ...

Building Code 2018 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 404 Atriums

Section 404 Special Detailed Requirements Based on Occupancy and Use, Atriums

The provisions of Sections 404.1 through 404.11 shall apply to buildings containing atriums. Atriums are not permitted in buildings ...

Building Code 2021 of Illinois > 4 Special Detailed Requirements Based on Occupancy and Use > 404 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

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 2018 of Illinois > 7 Fire and Smoke Protection Features > 707 Fire Barriers > 707.3 Fire-Resistance Rating > 707.3.6 Atriums