The 65 psi end head pressure is a bitter pill but NFPA 13 allows them to be 
retained for modifications to existing systems.  That clause is part of the 
current standard so bringing the system up to current standards does not 
exclude it’s application.  Mediocre fire protection at best but allowed.  A 
discussion with the AHJ at the BEGINNING beats a fight after the fact since 
interpretation enters the fray.

Roland


Roland Huggins, PE - VP Engineering
American Fire Sprinkler Assn.       ---      Fire Sprinklers Saves Lives
Dallas, TX
http://www.firesprinkler.org <http://www.firesprinkler.org/>





> On Oct 2, 2015, at 12:41 PM, James Crawford <[email protected]> wrote:
> 
> This is a sprinkler system that was designed to have in-rack sprinklers 
> installed at a future date if required, and for this tenant we were planning 
> on installing two levels of in-racks with a ceiling density of 0.45, this is 
> what is currently in this building.
> 
> I see no need to change the roof system heads if they work.
> 
> 
> 
> Thank you
> 
> 
> James Crawford

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