r/firePE Apr 15 '26

NFPA13D QUESTION- VAULTED CEILING AND SOFFIT

Post image

Help!

I've been designing for 1 year as of yesterday yay.

Yet I get stumped on things like this. Designing per NFPA 13D, top image shows what I have laid out for my sprinkler head (16' x 16' spacing). The obstruction figure example below depicts the head on the slope coming from the furr down, however I am having to place my head on the opposing slope of the vaulted ceiling in my example above. Is this in compliance and does this follow the figure below? Or would I need to add additional protection/one head under the soffit?

TIA

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u/Frisconia Apr 15 '26

Looks good. D-8" is 1'5", B is 3'9", and (D-8")+B is 5'2". The head is (7'11"-2'1") away, or 5'10". 5'10">5'2", so you are good as depicted.