Andrew Zonenberg3d ago
Firestopping on cable tray penetrations between my lab and house (cc: @whitequark )
Show threadLambda3d ago
@azonenberg @whitequark huh, you just stuff those pillows in there and caulk up the gaps? I don't think that's allowed here - at least I've never seen it for residential/normal business buildings, it's always fully filled up with white firestop compound.
Show threadAndrew Zonenberg

@lambda @whitequark Yeah the pillows are great for cable tray configurations that you modify frequently because you don't need caulk between them (only in small voids around the bottom of the tray where the caulk can't reach). Which makes it super easy to open things up and add more cables or something.

See https://www.3m.com/3M/en_US/p/d/b40070037/ (not the exact part i used but similar)

Apr 12 at 6:47amWeb