Extended Coverage in Self-Storage facilities - NFPA 13 (2013) - Figure 8.8.5.2.2

[Luis Bernal]

Hello,
I'm trying to determine the use of extended coverage sprinklers in a self-storage facility. (Ord. Haz 2)
Given that 18" clearance from top of unit partition to top of sprinklers is provided.

Extended coverage sprinklers still need to meet spray pattern in order to get to the other side of obstruction.

Question:
Based on table this only applies to light hazard occupancy.
Does this automatically cancels the use of this table and i need to put a sprinkler in every unit storage?
or another option i was thinking is to show them i the middle of the partitions.

Thanks,

 

[cdafd]

Luis,


Yes I would say for light hazard only.

 

[SprinklerDesigner2]

I think you will discover self storage units are Extra Hazard if you have foam rubber mattress.

And all of them do.

Take a queen mattress on edge and it exceeds the 5' maximum for Group A plastic storage.

 

[SprinklerDesigner2]

Found this on the internet "Fire Retardants in Mattresses

As of 2007, all mattresses are required to contain enough Fire Retardant Chemicals to withstand a 2-foot wide blowtorch open flame for 70 seconds. Nearly 92% of the market, or most major sleep product brands, use a highly controversial fire retardants due to its cost efficiency."

Still seems to me you can't escape the Extra Hazard.

Comments anyone?

 

[TravisMack]

I see most of them done to OH2. I protest loudly to get to EH1 or EH2. If the FPE is willing to put his name on the line and call it OH2 and take all liability then I go with OH2.



Travis Mack, SET, CWBSP, RME-G, CFPS
MFP Design, LLC

http://www.mfpdesign.com

 

[SprinklerDesigner2]

Travis,

I've bid several but got beat badly every time because I refuse to go anything other than EH1. I don't need the work badly enough to sell out my beliefs on what is right.

I wonder how Stookey looks at this from his perspective?