A couple of points here:
1. You do not say where the demand points are located. I have to make assumptions that the garage is probably at the dry valve or whatever system control. Is the 7th floor demand taken at the floor control on the 7th floor? What is the actual demand at the BoR or location close the garage connection? 2. Are the sprinklers fed from a separate riser or a combination sprinkler/standpipe? 3. If you install a 350 gpm pump on the system, is that going to impact the fire department’s ability to pump to the standpipe demand? 4. 7 floors seems like a tall building for a manual wet standpipe. I assume there are at least 2. Todd G Williams, PE Fire Protection Design/Consulting Stonington, CT 860-535-2080 (tel:860-535-2080) (ofc) 860-554-7054 (tel:860-554-7054) (fax) 860-608-4559 (tel:860-608-4559) (cell) > > On Nov 19, 2024 at 9:06 AM, <Jeff Brickell (mailto:[email protected])> > wrote: > > > > > > I have a situation that’s unique to me and am looking for some guidance. > > > > > > > > I have a 7-story building. The first level contains a parking garage with > a demand of 635 GPM @ 61 PSI. The municipal supply can meet this demand. > > > > > > > > The 7th floor has a remote area with a demand of 285 GPM @ 66 PSI, which the > municipal supply cannot meet. > > > > > > > > NFPA 20 says to size a fire pump to meet the greatest demand. If I can > meet the level 1 demand without a pump, why would I need to size a fire pump > for it? There would be a drastic size reduction if I only had to meet the > 7th floor demand. > > > > > > > > I have reached out to a couple other people, and they have all said I need to > size the pump to the garage demand, I am just curious as to why. > > > > > > > > If the contractor were to tee the underground and bring up a second supply > for the first floor only would that be acceptable to then not use a pump? > Maybe there is something I’m not considering or thinking of since this is new > to me. > > > > > > > > Any advice, comments welcome, thank you. > > > > > > > > > > > > Jeff Brickell, CET > > > > Senior Estimator/Designer > > > > NICET III CERTIFIED > > > > CERT #147245 > > > > > > > > OREGON CERTIFIED COBID FIRM #13272 > > > > (EMERGING SMALL BUSINESS) > > > > > > > > TRIAD FIRE PROTECTION > > > > > > > > OREGON . WASHINGTON . ARIZONA > > > > > > > > OFFICE 503.856.6333 > > > > CELL 602.550.4292 > > > > FAX 866.766.8862 > > > > > > > _________________________________________________________ SprinklerForum > mailing list: > https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org > To unsubscribe send an email to [email protected] >
_________________________________________________________ SprinklerForum mailing list: https://lists.firesprinkler.org/list/sprinklerforum.lists.firesprinkler.org To unsubscribe send an email to [email protected]
