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 [cid:[email protected]] 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]
