Evan at 900 sq ft, you still need to get 5 sprinklers.
You may be able to use 2.8k or 4.2k sprinklers in the closets and
bathrooms. That way, the 900 sq ft may not be too bad.
I would just throw on several remote areas and see what one is the most
demanding. Do 5 ex cov sprinklers as you originally stated.
22.4.6.2 says you can eliminate those sprinklers in small rooms if you
do 1500 sq ft.
You just have several different options. See which one is the most
demanding.
Travis Mack, SET
MFP Design, LLC
2508 E Lodgepole Drive
Gilbert, AZ 85298
480-505-9271
fax: 866-430-6107
email:[email protected]
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On 7/13/2016 8:14 AM, Art Tiroly wrote:
What state are you in?
Can I assume you are planning quick response sprinklers.
Then why not 900 SF area of application allowance?
What part of the code is AHJ using for this requirement.
There are residential rules in 13.
Use residential heads with .10 density
Art Tiroly
Tiroly and Associates
*From:*Sprinklerforum
[mailto:[email protected]] *On Behalf Of
*Jay Stough
*Sent:* Wednesday, July 13, 2016 10:51 AM
*To:* Sprinkler Forum <[email protected]>
*Subject:* Calculating extended coverage
I have a nursing care facility that I am trying to calc. Must be 13
(2007) light. Can not use room design or residential method per state
AHJ. The building is shaped like an upper case H with the bottom legs
cut off. There are 4 rooms on one side of the corridor and 3 rooms on
the other side of the corridor in each upper leg that use extended
coverage sprinkler in each room. Also 1 standard spray sprinkler in a
closet and one standard spray sprinkler in a bathroom in each room.
Sprinklers in the corridor are standard spray also. Since I am using
extended coverage sprinklers, I need to calculate 5 minimum. The
sprinklers cover 16'3 X 14', so need to calc at the 18' X 18' rate.
22.4.6.2 allows me in "rooms like closets, washrooms and similar small
compartments requiring only one sprinkler shall be permitted to be
omitted from calculations within the area of application". Can I
calculate 6 extended coverage sprinklers, without the corridor or
"small rooms or compartments" for my 1500 sq ft? Or should I calc 5
extended coverage and the hallway sprinklers in the 1500 sq ft?
/Jay Stough/
NICET IV LAYOUT
NICET III ITM
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