patch a double sheetrock ceiling

[walkerj]

Also note the Exception.

That is where you got tricked because that box is likely not tested in that ceiling assembly.

Good luck and I hope your fire marshall isn't the same one from Opelousas, LA :roll:

 

[iwire]

The cut-in box may have a 2-hr rating, but it still needs to be secured to a framing member.

You do not know why do you?

The listing of a fire rated assembly requires it.

This info can be found in the UL 'Orange book'

 

[Ravenvalor]

Support

Support

Thanks for the heads up, I appreciate the help.

 

[Ravenvalor]

Sheetmetal medallion

Sheetmetal medallion

Hi Folks,

I called T&B about the 30809 and it looks like it would not work due to its proximity to another box (minimum 6'). I was wondering if I can cut a piece of thick sheetmetal and put it over the hole.

Thank you for the good replies.

Jim

 

[Ravenvalor]

What about a 1 hour ceiling

What about a 1 hour ceiling

Keep in mind a 2-hr rated wall must have overlapping seams.

I have just learned that the ceiling is not 2 but 1 - hour rated. Do I still have to overlap them? I actually need a 1 - hour plug that I can remove. I wonder if I can put a puddy pad on the back of a pop in gangable metal box.

Thank you,

Jim

 

[Ravenvalor]

rated box.

rated box.

Why not put in a rated box with a blank cover? you are going to cover it anyway.

Do you know of a 1 - hour rated box that will pop into a ceiling? Another issue is that there are 55 - of these I will have to make and one sheetrock installer is saying that there will be too many plugs in a rated ceiling.


Thanks,

 

[Lavenburg]

It really sounds like the Fire inspector is pushing your buttons for some reason. How about installing a metel barrier between the two layers. Like previously stated before, on the interior side layer make it a couple of inches bigger and line it with a thin layer of sheet metal. Then apply the second layer of drywall. That should do it for you.

 

[jmellc]

CES use to sell fire caulk in flat patch form, seems like about 6" by 6". They quit selling it and I haven't seen in anywhere else. Seems like that would be excellent for a good fireproof patch. Overlay a few of them side by side over seams and place another piece of drywall on top.