Spacing between fire hydrants

[gradfire]

Dear All,

Is there anywhere in NFPA codes mention of spacing between two respective fire hydrants for different occupancies. I have not been able to find one, so far. If someone can help please.

Cheers Mates.

 

[SprinklerDesigner2]

In the For What Is Worth department there may be more but from the International Fire Code, 2006 Edition, Section 508.5.1

Fire Hydrant Systems: Where a portion of the facility or building hereafter constructed or moved into or within the jurisdiction is more than 400 feet (122m) from a fire hydrant on a fire apparatus access road, as measured by an approved route around the exterior of the facility or building, on-site fire hydrants and mains shall be provided where required by the fire code official. Exception: For buildings equipped throughout with an approved automatic sprinkler system, the distance shall be 600 ft.

From NFPA 24 " Standard for the Installation of Private Fire Service Mains and Their Appurtenances" - 2002 Edition Section 7.2 having to do with number and location of hydrants.

7.2.1* Hydrants shall be provided and spaced in accordance with the requirements of the authority having jurisdiction.

 

[gradfire]

Many Thanks for the reply, mate. cheers

 

[rconner]

Yes, I think NFPA 24 v2010 "mentions", and defers, "spacing" of hydrants basically to the authority having jurisdiction. [That being said, I believe designers are probably increasingly using GIS etc. in fire and other flow analyses and models, and to help in determining "spacing" for hydrants and valves etc. to satisfaction of authority(ie)'s requirements.]

 

[chicopee]

I agree with RCONNER about the NFPA and the local jurisdictions, however, the insurance industry also banks on the number of hose streams which one fire hydrant may be able to provide.

 

[Twinkie]

Most trucks only carry 500' of supply line, the length that the local FD carries is/will come into play.