Sorry about not including more information…I was trying to be a bit coy about the situation.
These are petroleum pipeline facilities, designed originally in 2014 and just now being completed. The Electrical buildings were prefab and certified under IBC 2012 as U type buildings. The sync in these is probably okay as internally the buildings have a single strobe per room. The pump house buildings are 70x40, one large hazardous Class I Div II area space, gas alarms are for flammable gases and have separate, but co-located strobes. These facilities have been classified as H buildings in other states, but generally as U in the current location. For sure the owner wants fire detection and alarm, but generally these facilities are unoccupied 24/7 unless there is maintenance to be done. The owners spec allows the gas and fire detection and alarm systems to be run through the facility PLC and not a fire alarm panel (this is a recent change in how they designed things). So now there is a issue with wiring integrity and the strobe says can, plus do you worry about syncing the gas strobes too. (The strobes are needed as the areas are way too loud to be in without hearing protection). UPS is provided to the PLC and 120V circuits. Figuring out how to help the owner sync the hazardous location 120v strobes in my big issue at this point. Any help with some thought now that I’ve actually provided perhaps enough information. All 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 LHB, Inc. | PERFORMANCE DRIVEN DESIGN. ...sent from the cloud through the tubes! ________________________________ From: John Drucker <[email protected]> Sent: Saturday, September 18, 2021 5:33:11 AM To: [email protected] <[email protected]> Cc: BRUCE VERHEI <[email protected]>; David Williams <[email protected]> Subject: Re: FA not sprinkler question 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
