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.
Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe
Subscribe and learn something new each day:
Thank You to Our Top
August 2020 Contributors!
Sprinkler Designer or Engineer?
Get all of our tools, including the Sprinkler Database, Friction Loss Calculator, Fire Pump Analyzer and more:
Daily discussions are open-ended fire protection, fire alarm, and life safety questions submitted anonymously for the benefit of sharing expertise and learning from other perspectives. Anyone can submit a question here:
2020 PE Prep Guide
PE Prep Series
2020 PE Prep Series
(Click to enlarge)
Visit July-October for daily Fire Protection PE Exam sample questions.
Solutions are posted the day after posting.
Comment with your solutions, questions or clarifications.
Please note that questions posted are unofficial and in accordance with NCEES rules are intended to be similar to actual exam questions, not actual exam questions themselves.