Tom,
I have a building which has a 260 sqft area which requires 0.5 gpm/sqft
over 2,500 sqft due to storage commodity and height. The unrated walls
separating the storage area from the sales area extend a foot above the
11'-0" ceiling in the sales area, while the storage area is open to the
16'-0" roof deck. Total suite area is only 1,300 ft2.
Do I have to extend the 0.5 density to the entire rest of the space
above the ceiling which is adjacent and open to the storage room? Or do
I simply extend it 150'-0" past the room, based on Section and Table
A.12.3 ('10 edition of -13)?
My interpretation of those sections, along with 12.3(1) is that I'd have
to provide 0.5 gpm/sqft over the storage area, plus 15'-0", while the
remainder of the space would only require 0.10 gpm density for light
hazard. The high temp sprinklers would have to extend beyond the
storage area by 30', but only the first 15' require the higher density.
Does that line up with your thinking?
--
PARSLEY CONSULTING
Ken Wagoner, SET
760.745.6181 voice
760.745.0537 fax
[email protected] <mailto:[email protected]> e-mail
www.ParsleyConsulting.com <http://www.ParsleyConsulting.com> website
tom poisal wrote:
> Russell, the latter is correct, .3 over the area plus 15' border. the
> balance is .2. The size of the of the operating area is determined by the
> higher hazard. A.11.2.3.1.1 (02 handbook)
>
> On Fri, Jul 16, 2010 at 11:10 AM, Russell <[email protected]>wrote:
>
>
>> Please bear with me for not letting this topic go but I need to confirm
>> something. I cannot remember the last time I dealt with adjacent hazards
>> that were not separated by a partion.
>> NFPA 13 '10 A11.1.2 leads me to believe that if a .3 density hazard
>> requires 2500 s.f. then the remote area for that hazard would take in that
>> area and as much of the .2 density hazard area as necessary to fulfill the
>> 2500 s.f. (understanding that the .3 would not be required for the .2 area).
>> That doesn't seem just to me. If the .3 area plus the 15' border doesn't
>> cover enough area to attain 2500 s.f. then use only all the area it does
>> involve plus the border because the .2 occupany isn't the same fire threat.
>> Does that make any sense?
>>
>> Russell
>>
>>
>>
>>
>>
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>
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