What is required for a door in a smoke barrier partition?

The primary function of a smoke barrier is to limit the passage of smoke from one area to another. For a door opening within this barrier to be effective, it must be closed during a fire event. Building codes mandate that doors in smoke barriers achieve this by being either self-closing (equipped with a device that closes the door after each use) or automatic-closing (held open by a device that releases and allows the door to close upon activation of a smoke detector). This ensures the integrity of the smoke barrier is maintained when it is most needed.

A. Panic door hardware: This hardware is required based on the calculated occupant load of a space and its use (e.g., assembly or educational occupancies), not by the door's location in a smoke barrier.

C. Class C fire protection rating: A fire-protection rating (like Class C, 20-minute) is only required if the smoke barrier is also required to have a fire-resistance rating. The fundamental requirement for a smoke barrier door is smoke control, not necessarily fire resistance.

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1. International Code Council. (2021). International Building Code (IBC). Section 712.4.3

"Doors in smoke barriers." This section states

"Doors in smoke barriers shall be self- or automatic-closing in accordance with Section 716.2.6."

2. National Fire Protection Association. (2021). NFPA 101: Life Safety Code. Section 8.5.4.2. This section specifies that doors in smoke barriers must be self-closing or automatic-closing upon detection of smoke.

3. Harmon

S. K.

& Kennon

K. E. (2018). The Codes Guidebook for Interiors (7th ed.). Wiley. In Chapter 4

"Fire- and Smoke-Resistant Assemblies

" the text clarifies that doors in smoke barriers "must be self-closing or automatic-closing" to maintain the barrier's effectiveness (p. 141). This is a standard textbook in accredited interior design university programs.