Steel Fence to Thwart Fire - Late Reply
I didn’t see rebox’s reply from a couple days ago until just now and I wanted to make sure he/she got the answer to his/her question. That’s a good question. A deck and a roof deck are actually considered very different items and are mentioned in different sections of the code. A roof deck falls…
I didn’t see rebox’s reply from a couple days ago until just now and I wanted to make sure he/she got the answer to his/her question.
That’s a good question. A deck and a roof deck are actually considered very different items and are mentioned in different sections of the code. A roof deck falls under section (Subchapter) 5: FIRE PROTECTION CONSTRUCTION
REQUIREMENTS, Article 4: PREVENTION OF EXTERIOR FIRE SPREAD: 27-338 Roof structures:
(j) Miscellaneous roof structures. – The following roof structures may be constructed of combustible material if
less than twelve feet high above the roof: antenna supports; flagpoles; clothes drying frames; duckboarding or
platforms that do not cover more than twenty per cent of the roof area at that level.
“platforms…” is what refers to roof decks.
The 3 feet doesn’t apply because the roof itself should have fire rated construction within 3 feet of the lot line, or have a 12″ high parapet providing fire separation between buildings.
JH
Since a deck and a platform are two different things the 3 ft. rule automatically doesn’t apply as that is a memo for decks and not for these platforms.
Thanks, jimhill. So what you’re saying is that the deck on this extension roof itelf must be fire-rated (which I would assume it is, as it was built in 2005; it also has a 24-inch parapet). And it can be combustible up to that parapet.