Ed,
adding on to what Travis and Steve have noted, yes, provided you
account for the increased remote area per 11.2.3.2.4, as well as taking
a reduction for quick response per 11.2.3.2.1.
based on the idea that you're protecting a combustible concealed
space with a pitch of 4:12 or greater, take a close look at the
information in 8.6.4.1.4 if you haven't already. It's also worth the
time to make sure you've taken into account the limitations on the
bottom row of Table 8.6.2.2.1(a) for coverage area and maximum spacing,
as Travis noted. Depending on the spacing you end up with 8.6.4.1.4.4
may force you into a 20 psi starting pressure.
*Ken Wagoner, SET
*Parsley Consulting***
*350 West 9th Avenue, Suite 206
*Escondido, California 92025
*****Phone 760-745-6181*
Visit our website <http://www.parsleyconsulting.com/> ***
On 3/16/2015 11:27 AM, Travis Mack wrote:
Yes..QR reduction permitted. We take the height based on the distance
from the lowest ceiling to the peak. Remember to take the 30%
increase for sloped ceilings.
One thing to consider. You are going to be limited to 120 sq ft per
sprinkler. Consider using 4.2k SSU (light hazard wet pipe) as it will
greatly minimize the over-discharge and therefore friction losses in
your system.
Travis Mack, SET
MFP Design, LLC
2508 E Lodgepole Drive
Gilbert, AZ 85298
480-505-9271
fax: 866-430-6107
email:[email protected]
http://www.mfpdesign.com
https://www.facebook.com/pages/MFP-Design-LLC/92218417692
Send large files to us via: https://www.hightail.com/u/MFPDesign
On 3/16/2015 11:26 AM, [email protected] wrote:
Here's one for Y'all.
With a wet-pipe system in an attic, (4/12 pitch) can the area
reduction for quick response sprinklers be used?
If so, how is the ceiling height determined? From the ceiling below
to the highest point of the roof?
Thanks
Bill
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