We have a residential project using NFPA 13 and are trying to determine whether the 8-residential sprinkler increase (or 3,000 sqft increase) applies.
Does this project require the sprinkler design below the ceiling using I-joists with sprinklers omitted from the concealed spaces, which are allowed under NFPA 13-2022 Section 9.2.1.6, if the I-joists defining the 160 ft³ compartments are not lined with a minimum 1/2" thick GWB adjacent to the web? The designer is using NFPA 13 Section 9.2.1.6 to omit sprinklers in the concealed space. Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
2 Comments
Dan Wilder
2/4/2025 08:17:01 am
For this specific section 9.2.1.6, you do not need the insulation nor 1/2" gyp board, just "materials equivalent to the web construction" if installed tight to the bottom of the TJI's. If there is any metal channel, then the batt insulation requirement gets triggered. Both instances still require the volumes of the channel to be <160 ft³.
Reply
Jack G
2/4/2025 09:44:41 am
TGI s ( strand board “ I beams “ with top and bottom chords made from “ stressed” wood, already form panels. ( 160 cubic feet- do the math)
Reply
Leave a Reply. |
ALL-ACCESSSUBSCRIBESubscribe and learn something new each day:
COMMUNITYTop January '25 Contributors
YOUR POSTPE EXAMGet 100 Days of Free Sample Questions right to you!
FILTERS
All
ARCHIVES
February 2025
PE PREP SERIES |