In NFPA 13, or any related/referenced standards, is there some guidance on where design criteria originates, and what its limits are?
I thought there was something that addresses the intent of the standard not to address arson, acts of God, etc.
I recall something to that effect but thought it was a jurisdictional requirement. I couldn't find any such thing.
Is there any such verbiage like this?
Thanks in advance.
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8/4/2022 05:52:29 am
8/4/2022 08:08:26 am
Alex is right. 13 indeed states the standard is for protection of a single ignition. There are a lot of engineering reasons for this, but the primary one being each ignition represents a single fire event and the water supply would be too taxed. I once investigated an arson fire with 23 separate ignitions so I understand the spirit of your question.
8/4/2022 08:11:59 am
I would say that most of the NFPA and Building codes out there preface their documents with - "...purpose of this code/standard is to establish the minimum requirements to provide a reasonable level of safety..." or some varied version of that.
8/4/2022 08:22:36 am
Only partially relevant, but I remember being taught by my professor that generally PBD Design Scenario 2 was an arson fire. Just my two cents.
8/4/2022 09:42:00 am
I would add that any presence of accelerants would be outside of the scope of light and ordinary hazard occupancies as an expected event. You may reference the occupancy definitions/examples from NFPA 13.
8/4/2022 10:30:19 am
That's insurance policy nomenclature who would be responsible for paying a claim in the event of a fire.
8/4/2022 12:34:24 pm
As indicated above, the fire protection is designed to be controlled over a designed area, with the assumption that the fire starts at a single point (following a single event) and spread as expected by design.
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