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A class III commodity is encapsulated and stored on shelves within a large walk-in cooler. A dry system is being designed to serve this hazard. If the storage is anticipated to be 13 ft. in height with a 17 ft. ceiling, determine the required design density with the smallest remote area for high temperature sprinkler protection using the Control Mode Density/Area approach. a. 0.14 gpm/sqft / 2,000 sqft b. 0.14 gpm/sqft / 2,600 sqft c. 0.15 gpm/sqft / 2,600 sqft d. 0.17 gpm/sqft / 2,000 sqft Solution | Posted 06/15/18 
11 Comments
FPE
6/14/2018 08:02:39 am
c. 0.15 gpm/sqft / 2,600 sqft
EwdH
6/14/2018 09:26:08 am
c. Not less than 0.15 gpm/sqft / 2,600 sqft
jakes
6/14/2018 10:45:46 am
the correct answer is not an option, it should be 0.225 gpm/ft2 /3000 ft2
KJK
6/14/2018 05:59:41 pm
Except we aren't using ordinary temp heads, and the question doesn't clarify what type of shelves are used.
jakes
6/15/2018 09:15:42 am
true, but with the assumption of back-to-back storage, this is true even for high temp rated sprinklers
KC
6/14/2018 03:42:11 pm
C
David
6/14/2018 04:08:53 pm
C.
DIAA
6/15/2018 03:37:35 pm
B) 2600 ft2 and denisty 0.14 gpm /ft2 as per NFPA 13 2016 ed. Figure 14.2.4.2 and its modification of caluse no. 14.2.4.3, 14.2.4.5 and figure of no. 14.2.4.3
DIAA
6/15/2018 03:42:10 pm
The correct is C) not B) due to 14..2.4.5
Renardy
9/19/2018 09:20:30 pm
Section 14.2.4.6 says density shall not be less than the density for the corresponding area of operation for OH2, which at 2600 Sq. ft. of Area of operation would be a minimum of 0.17 - 0.18 density. (since storage height is over 12 ft.)
KMAB
10/8/2018 08:40:14 am
I got caught up on this too; though it looks like 0.17 - 0.18 gpm/ft^2 over 2600 ft^2 isn't an option. Does anyone have any ideas as to why this code section isn't used? Leave a Reply. |
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