David, If your an IBC/IFC state then either chapter 4 or chapter 9, will call out a fire alarm system requirement.
As for the strobe, sync is only required where more than two strobes are in the field of view from inside the building per NFPA-72. As for the sync paradigm here’s an interesting discussion https://forums.thefirepanel.com/t/the-mechanics-of-smartsync/1163/3 Hope that helps, John Drucker AHJ Fire and Electrical New Jersey USA John Drucker ________________________________ From: Sprinklerforum <[email protected]> on behalf of BRUCE VERHEI via Sprinklerforum <[email protected]> Sent: Friday, September 17, 2021 9:44:07 PM To: [email protected] <[email protected]> Cc: BRUCE VERHEI <[email protected]>; David Williams <[email protected]> Subject: Re: FA not sprinkler question Gas detection? To me that implies some special former tenant. Or normal CO detection? Are there natural gas fired appliances in the space? Sync. There are more than one options, somewhat dependent on age of system. By servicing, do you mean space is vacant? Unless the jurisdiction is huge the fire plan reviewer can probably answer your questions about why system is in the particular building without any file searching. No sizes, building configuration, occupancy class or so on is provided so I wouldn’t expect even a guess on this forum. In addition fire alarm is one area of the fire codes that quite a few cities customize. Was system installed as part of an alternative methods and materials trade off? Lastly if there was some ability to lessen part of the fire protection system in the end only the owner could request it. If next week a new tenant requires that same feature no plans reviewer is going to count on a spk contractor getting out their checkbook. Best. Bruce Verhei > On 09/17/2021 2:30 PM David Williams via Sprinklerforum > <[email protected]> wrote: > > > I’ve been asked to look at a new industrial building, generally unoccupied > except for servicing, that has a fire and gas detection system and audible > and visual notification devices. > > At this point I’m not sure this facility actually requires a FA system, as it > might just be an owner requirement. The designers used an industrial > hazardous location strobe Crouse-Hinds XB15 (120v) connected to the building > PLC and is having issues with integrity testing of the wiring and with > syncing of the strobes. If it actually has to be a NFPA 72 system then it’s > all going to need to be gutted, but if not can someone explain how “normal” > FA strobe and NAC circuits work to sync? Do they use a sync signal, turn on > and off the power, or by starting at the same time sync that way? > > David Toshio Williams, PE*, FPE – Lead MEP/FP Engineer > (*Registered in MN, WI, MI, IA, IL, IN, ND, VT) > 21 West Superior Street, Suite 500, Duluth, MN 55802 > Direct 218.279.2436 | Cell 218.310.2446 > LHBcorp.com<http://www.lhbcorp.com/> > > LHB, Inc. | PERFORMANCE DRIVEN DESIGN. > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
