Interpretation #8055
Published January 08, 2018
Original Request
- Code Version
- 2014
- Code
- RESIDENT
- Code Description
- Chapter
- 3
- Section
- 302.1
- Topic
- Glass-block in an exterior rated wall
Question
Is it the intent of Table R302.1(1) to not allow glass block with a 1 hour rating in a wall built on a zero lot line? If the structures are separated by eight (8) feet would it be acceptable?
Answer Published 01/08/2018 at 11:15 AM
Section R302 of the 5th Edition was revised by statute to allow zero lot line buildings to have openings and non-rated roof overhangs as follows:
7. For zero lot line developments where permitted by local regulations, openings and roof overhang projections shall be permitted on the exterior wall of a building located on a zero lot line when the building exterior wall is separated from an adjacent building exterior wall by a distance of 6 feet or more, and the roof overhang projection is separated from an adjacent building projection by a distance of 4 feet or more, with 1-hour fire-resistive construction on the underside of the overhang required, unless the separation between projections is 6 feet or more.
Therefore, glass block is permitted on the zero lot line side when there is a fire separation distance of 6'0" or more measured building face to building face.
7. For zero lot line developments where permitted by local regulations, openings and roof overhang projections shall be permitted on the exterior wall of a building located on a zero lot line when the building exterior wall is separated from an adjacent building exterior wall by a distance of 6 feet or more, and the roof overhang projection is separated from an adjacent building projection by a distance of 4 feet or more, with 1-hour fire-resistive construction on the underside of the overhang required, unless the separation between projections is 6 feet or more.
Therefore, glass block is permitted on the zero lot line side when there is a fire separation distance of 6'0" or more measured building face to building face.
Commentary
None.