Sprinkler system design
Sprinkler system design
(OP)
I am supervising the specialties designs of a new building and for the srinkler system I would like to know if NFPA 13 incise 11.2.2.5 applies to a single floor of a builing or to all of them? Also how do I select form table 11.2.2.1 the total flow from 500-750 gpm that includes hoses. Is it 750 for 30 minutes and 500 gpm for 60? this is a 14 floors building with a total 1667 ft2 covered area per floor.-





RE: Sprinkler system design
Travis Mack
MFP Design, LLC
www.mfpdesign.com
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RE: Sprinkler system design
RE: Sprinkler system design
This may keep you from using the pipe schedule method. I would say that the calculation method is far more common.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: Sprinkler system design
(3) New systems of 5000 ft2 (465 m2) or less
Per story
But anyway I willl use the hydraulic method, thank you
RE: Sprinkler system design
RE: Sprinkler system design
Not to sound ignorant, but you do realize that not all sprinklers activate at once. It is only the sprinklers where the fusible link has been removed due to heat from a heat source such as a fire. For your 14 story building, you do not need to figure all 14 floors flowing at the same time.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: Sprinkler system design
And no, of course the all at once scenario is not a possibility. Just checking the code .:
RE: Sprinkler system design
I doubt your 5000 sq ft floors have more than one standpipe, so you have a 500 gpm standpipe demand. Due to the height, you will need to deliver 100 psi to the top valve on your standpipe. So, you pump must be designed to handle that pressure and flow. Many falsely put that 100 psi at the hole in the pipe for a standpipe. But, you may lose about 5-7 psi through a hose valve, nipple and welded outlet.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: Sprinkler system design
RE: Sprinkler system design
RE: Sprinkler system design
RE: Sprinkler system design
RE: Sprinkler system design
RE: Sprinkler system design
RE: Sprinkler system design
Also, in the US, you may have an AHJ that does not have significant experience in an area and is reviewing plans for projects. So, it does happen when the less experienced guy is reviewing the more experienced guy. It can get frustrating, but it does happen.
Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...
RE: Sprinkler system design