Does Proximity Impact NFPA 13 vs. 13R vs. 13D?

10/29/2019

Does the proximity of a residence and the number of windows on that residence make a difference in which system type is used (between NFPA 13, 13R, or 13D)? What are the restrictions that would impact the system type?

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3 Comments

Wayne Ammons

10/29/2019 07:38:19 am

Interesting question, check out one of Joe's recent blog posts:
https://www.meyerfire.com/blog/when-can-i-use-nfpa-13r-part-i

I am not very familiar with exposure protection, but that is what your question made my mind jump to so I immediately thought to reference Section 1.1 - Scope of NFPA 13, 13D, and 13R which explains where each standard is applicable. There is also NFPA 80A, Recommended Practice for Protection of Buildings from Exterior Fire Exposures. You may also want to get the owner and project engineer involved to help decide which standard and method of protection is most appropriate for your scenario.

Pari

10/29/2019 11:36:48 am

in our jurisdiction any single home greater than 10,000 S/F, fire sprinkler design shall be per NFPA13R and attached or detached garage greater than 750 S/F shall be design per NFPA 13.

Also dedicate fire water line required for 13R system , with this requirements the larger houses or garages can have better life safety protection.

Arthur J Tiroly link

10/30/2019 02:44:17 pm

13-D is limited to 1 and 2 family dwellings. Water supply has to supply just two sprinkler for 10 minutes.

13-R is limited to apartments 4 stories or less.
Water supply is required to support 4 sprinkler.
Only the dwelling units and adjacent hallways require sprinklers. None in attics or false spaces.

NFPA 13 also allows that only 4 sprinklers need to be supplied in dwelling units and adjacent corridors. Attics and false spaces require 100% sprinklers.

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