Hide Pipe Support in Lower Suspended Ceiling?

10/18/2019

I'm designing a system with sprinklers at the ceiling of a large open space. There is a vestibule within this space that has a lower ceiling that requires 3 sprinklers. The client does not want pipe drops or hangers above the vestibule to be visible from the rest of the open space.

The proposed solution is to run a branchline down the wall and horizontal tight to the ceiling. Is there a good way to support this that meets the requirements of NFPA 13 chapter 9? The vestibule has CMU walls and metal stud ceiling.

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1 Comment

Anon.

10/18/2019 10:47:19 am

IF I am picturing this correctly, I just had one similar, a fancy lobby with a low lobby with lid. We ran the pipe concealed within the interior wall, then popped back out, just over the top of the lid where the horizontal pipe would NOT be visible. You are supplying more than one sprinkler, so you may have to incorporate flexible couplings and aux drain. To secure to framing, depending on the situation, I have rested on top with short clips, or strut with u-clamps, or a FEW of the CPVC stand-off hangers are listed for steel for smaller sizes. Would the piping be visible if you ran that low? Or if it is possible to suspend below the steel framing, perhaps side beam bracket or Sammy/Elco sidewinder probably with backing nut. If you must be visible tight to the ceiling below, then I dunno… Standard rings or 138R split rings and Sammy/Elco or ATR nut and washer? assume you can’t cover the space with sidewalls. Does the steel framing have openings through the webs?

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Hide Pipe Support in Lower Suspended Ceiling?

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