NFPA 72, 2016 Edition uses the phrase "2-hour fire-rated construction" in a few places; what does this refer to?
It's confusing to me since a variety of elements within the building could be 2-hour rated. For example, NFPA 72-2016 Section 18.104.22.168 states:
"Two-way in-building wired emergency communication systems shall have a pathway survivability of Level 2 or Level 3. Exception: Level 1 shall be permitted where the building is less than 2-hour fire-rated construction."
Buildings are not designated with a fire-rating, elements are. How do you interpret this?
Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
5/20/2021 08:42:54 am
SFPE has an article that talks about fire ratings/enclosures and pathway circuit survivability requirements. Not sure if this helps provide a little bit of clarification regarding a specific construction types.
Todd E Wyatt
5/20/2021 08:53:50 am
5/20/2021 08:57:53 am
Under that premise of a "building" being less than 2-hour, would a Type II-B building, without any rated partitions or barriers, be considered having 2-hour fire-resistance-rated construction?
Todd E Wyatt
5/21/2021 08:27:33 am
I neglected to include Type IIA (1-Hour) and Type IIB (0-Hour) with the above Type III, IV or V Types of Construction that would be less than 2-hours.
5/21/2021 07:46:21 pm
easiest way it that it is contained and isolated from the rest of the building, think shaft, stairways, mechanical / electrical rooms that are stacked
8/3/2021 08:52:35 am
The facts that have been discussed here are really important. Thank you so much for sharing a great post.
Leave a Reply.
Subscribe and learn something new each day:
Top May 2023 Contributors
Get 100 Days of Free Sample Questions right to you!
PE PREP SERIES