Interpretation #9089
Published August 13, 2025
Original Request
- Code Version
- 2023
- Code
- MECHANIC
- Code Description
- Chapter
- 6
- Section
- 607.5.4
- Topic
- 607.5.4 Corridors/smoke barriers.
Question
Is it the intent of Section 607.5.4 to only apply the exemptions of this section to the duct penetrating the corridor wall or is it the intent to apply to the main duct run on the building.
Answer Published 08/06/2025 at 10:33 AM
The section noted requires a listed smoke damper if the duct penetrates the smoke barrier wall or corridor enclosure required to have smoke and draft control doors in accordance with the FBC. If the building meets one of the outlined exceptions, then the smoke damper can be eliminated.
Commentary
None.