Would a mechanical penthouse be considered a “story” in terms of the 30-ft. standpipe threshold?
If the mechanical penthouse is not occupied, does it still apply for the 30-ft limit? Although that would be logical, I can’t the word “occupied” used anywhere except related to high-rise. I suppose a mechanical penthouse could be considered a mezzanine, I see some commentary that a mezzanine should be no more than 1/3 of the related floor.
The project has three floors where the top classroom floor is 28 feet above fire department access. But, there’s a mechanical level above that is much higher. It’s accessible, is it a “story” in terms of standpipe? It would seem logical that this penthouse doesn’t count. But I’m not 100% sure code backs me up on this.
Of course the thing that bites us, is whether or not the standpipe is manual or automatic – we have fond this to be totally up to the discretion (sometimes whim), of the AHJ. Sometimes based on good reasoning, sometimes it has causes the unnecessary (IMHO) requirement for a fire pump.
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