Correct - for standpipe calculations purposes, buildings protected with NFPA 13R systems do not meet the requirements to limit the flow to 1,250 GPM

10.6.1.1.6 in NFPA 14 - 2024

John August Denhardt, P.E.
Vice-President Engineering and Technical Services
American Fire Sprinkler Association 
301-343-1457

On Apr 3, 2024, at 09:49, Fpdcdesign <[email protected]> wrote:


13R buildings are not considered to be fully sprinklered. 



On Apr 3, 2024 at 9:45 AM, <Shawn Foor> wrote:

Why would you do 1250 if it’s a fully sprinklered building?  

Shawn Foor, SET

FOOR DESIGN, LLC
10208 E 98TH ST
TULSA, OK 74133
P:918-237-1400


On Wed, Apr 3, 2024 at 08:43 <[email protected]> wrote:

Asking this on behalf of Rowe Sprinkler Systems (Temporally Un-Retired)

 

We have a 4-story modular apartment building sprinklered in accordance with NFPA 13R with allowed exceptions, with 4 standpipes. The standpipes are connected at the 1st floor level. One each at the ends of the L shaped building and two at the approximate mid-point on either side of a 2-hour separation wall with self-closing, rated doors in the corridor.

The question is for purposes of calculating the standpipe can these be treated as two separate buildings? For example, 250 gpm at the far end of the 4th floor, 250 gpm at the far end of the 3rd floor and 250 gpm at the at the connecting point of the middle standpipe, for a total of 750 gpm.

Or do we have to calculate the additional standpipes up to 1250 gpm. Available water is the issue.

 

 

Richard L. Mote CET

Rimrock Design Services, LLC

Middleburg, PA 17842

Mobile 570-541-2685

EMAIL [email protected]

WEB: www.rimrockdesignservicesllc.com

 


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