One Hour Rated Wall

baccel

Any drywall contractors out there? I have a question about a one hour separation wall. Can you get a one hour rated wall with bar joists passing thru the top of the wall @ 24in. centers by piecing in around the joists and fire taping it up really tight. The wall is 3 5/8 metal studs with 5/8 both sides. Thanks, Mike

Brockster

One hour rating can vary a lot so it's best to contact either the architect or the local building inspector.

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player2watch

These days they make chaulk or stuff and spray around those pentrations. thats why the ul manual has head of wall and pentrations in them. fire tape is the past and is no longer accepted in the states that i have worked in. some companies sent the inspector to free class to show them how it should be done.

PrecisionTaping

I dont really see a problem if there's no gaps.
If you've flat tape tight to it on either side you should be good.
As an extra precaution though you can always buy some fire proof caulking.
Like this for example: http://www.firesealants.com/?a=prod
One of the features of that caulking is it "expands when heated to seal voids created when substrate items are consumed by fire."

Like Brockster said though, you can always contact your local building inspector and ask a few questions.

griz

No plans or specs to refer to?

Speak with the Bldg. Inspector or Fire Marshall.

PrecisionTaping

Agreed.