Trapeze Hanger Allowed Through a Wall?

9/13/2019

You are hanging pipe and you need to install a trapeze hanger on a retrofit project (no seismic requirements).

One joist/beam is above and the 2nd is on the other side of a full height wall. Can you penetrate that wall, with your trapeze, to hang off the other beam?

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3 Comments

Wayne Ammons

9/13/2019 07:14:39 am

Interesting question when you think about it. I don't see why not as long a few factors are kept in mind; project specifications don't prohibit penetrations (i.e. foreign materials penetrating from a non-secure room to a secure room), you maintain any rated penetration requirements, and the load of the sprinkler piping is supported by the trapeze member and the structure and not the wall itself. This is just off-the-cuff thinking on my part.

Randy

9/13/2019 10:14:49 am

Yes. Just seal the penetration correctly for the wall in question.

Dan Wilder

9/13/2019 10:19:48 am

I've done this several times without issue. Even through rated wall, I just have the fab shop weld caps onto each end of the pipe along with the ATR piece and just fire caulk the penetration.

I have had arguments with AHJ's when the caps are not welded (or grooved) and were stuffed with fire caulk at the ends because the caulking was not at the actual penetration (most details, outside of an EJ, show the materials at the assembly being penetrated).

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