Fire Suppression - Water Tank

[Taissa]

Hello,

I'm designing a sprinkler system for a residential building (light hazard). However, this building has an unheated parking (ordinary hazard I). Running the hydraulic calculations, I find out that I don't have enough water to supply my system (the public main only provides me with 500 GPM and I need around 660 GPM - 410GPM for my sprinklers and 250 GPM for the outside hose allowance). So I have to provide a tank, right? How should I size my tank? 660 or 160 GPM for 60 MIN? And Where this supply will be added to my system? Thanks in advance.

 

[EdStainless]

It depends on the local codes how you handle this.

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P.E. Metallurgy, Plymouth Tube

 

[Artisi]

Correct, local code and the underwriters.

It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)

 

[chicopee]

I don't know where the deficiency is occurs, however, you may want to look into a closed water loop to the sprinkler system alarm check valve or a closed main loop feeding the branch lines.