Confusion regarding area of coverage and sprinkler spacing

[kayfactor]

Hi All,
I am a mechanical engineer from Australia, working in Dubai where we US standards. I just moved here few months ago.

I am confused about NFPA 13 8.5.2.1.1 (2015 ed) protection area of coverage

What I want to ask is the areas given in Table 8.6.2.2.1 are they maximum or minimum ?

I am having trouble doing the spacing, I currently have an area which is Ordinary Hazard and I have done spacing as 3.9m x 3.9m, this would give an area of ~15m². Which is more than the 12.1m², would this be ok ?
Since I have not exceeded the maximum spacing limit of 4.6m?

Any advice would be greatly appreciated.
Thanks

 

[TravisMack]

Area is a maximum. 12.1m2 maximum coverage for ordinary hazard. You can space up to 4.6m in one direction, but you have to make sure you don't exceed the total area permitted.

Travis Mack
MFP Design, LLC

http://www.mfpdesign.com

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