I have always found 8" centerline above finished ceiling to work well. This usually keeps us below the bulk of the ductwork but high enough that the lights can be installed as long as the sprinkler pipe is not run over the center of the light fixture. You must avoid can lights, but otherwise it works out well. Of course, each project is different so it doesn't always work, but this is my ideal setup.
Seismic bracing will change this. If there is a lot of space between the ceiling and the structure, I will run the pipe at the structure to make the bracing work out better and drop to the heads. Just my two cents. I'm sure others have a different perspective, but this has worked out well in many different types of projects with and without BIM coordination. ________________________________ From: Sprinklerforum <[email protected]> on behalf of Joseph Meyer <[email protected]> Sent: Monday, June 26, 2017 10:35 AM To: [email protected] Subject: Pipe Height Above Ceiling What is your preferred (ideal) height to run sprinkler pipe above suspended ceilings? Is your preference to run as low as possible above the depth of the lights to save on pipe, to run a fixed height above the ceiling (ie: 8", 12", 14") to simplify cut lengths, just run anywhere in between the lights and ductwork, or something else? I've heard a few different approaches to this question and was curious what considerations our experts here make when determining how high to run. Thanks in advance. -- Joseph Meyer, P.E. Fire Protection Engineer [SSC Engineering] 18207 Edison Avenue Chesterfield, MO 63005 Phone: (636) 530-7770 x 149 Fax: (636) 530-7877 [email protected]<mailto:[email protected]> SSC is now providing FULLY ENGINEERED Fire Protection services
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