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Old 09-24-2008, 02:35 PM   #1
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firestopping question


I know I need to firestop penetrations through the top and bottom plates, as well as at any soffits. Do I need to firestop horizontally in stud walls where the wire is running through the studs from box to box? I'm in MA in case that matters.

BTW, this is probably a dumb question but does anyone know if there is any sort of compatiblity issue with Romex SIMpull coating and firecaulk? I know the stuff I'm using (3M CP +25WB Intumescent) is okay with PVC jackets but this SIMpull stuff has a coating over the top of the PVC.

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Old 09-24-2008, 03:31 PM   #2
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firestopping question


I love firestopping!

In a wall, you need to firestop for horizontal movement in 10' increments and vertical 10' increments. Basically, if a fire breaks out in the wall or in the gap between a framed wall and a foundation wall, you have to stop (or slow) its movement to 10' horizontally. Firestopping is less effective at stopping fire than it is at stopping the air that feeds a fire. Fire has a heck of a time proliferating in a properly firestopped space.

I'm unaware of any issue between simpull wire and intumescent caulk. The wire manufacturer might be able to shed some light on that, but firecaulk isn't really evil stuff, and I've never known it to do any sort of damage to plastics.

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Old 09-24-2008, 06:43 PM   #3
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firestopping question


Quote:
Originally Posted by thekctermite View Post
I love firestopping!
LMFAO

That is so far from the truth, if you like fire stopping you have been smoking the happy plant a little to much
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Old 09-24-2008, 07:14 PM   #4
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firestopping question


Okay, that's what I figured. I have one wall where the wire is running horizontally through the studs for over 12' so I'll need it there. All the other boxes are fished up from below so I don't have to worry about those. Thanks for the confirmation.

As for the caulk/wire question, I suspect it's fine but I may shoot an email to the manufacturer just in case.

Thanks for the reply.
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Old 09-30-2008, 01:45 PM   #5
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firestopping question


Just in case anyone searches on this subject in the future, Southwire has told me the firecaulk listed above is compatible with SIMpull coating.
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