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Discussion Starter · #1 · (Edited)
I am replacing some subfloor and realized I have a situation.
What do I do about ducting?

Span is 13”, and the clearance is a little over 1 1/2”.

This is where the cabinet is going so the foot of it would be sitting about 3/4 from the left.

Was thinking of using a 2x4 like normal and cutting out to fit around it.

Any other ideas? Are there rules about clearance of wood and ducting?

Moving or lowering the ducting is not possible

Edit, the picture is sideways
 

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Amateur. I think there is some rule about a clearance in case flame goes through the duct. But many houses I saw, in nj and every little town with an inspector, all duct looked like the photo. If not sure, ask this again in hvac section of the forum.
 

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What does have anything to do with what is on the living space side of the subfloor? The pipe is between the joists. The cabinet will be on the top side of the floor. That duct was there before you cut the subfloor, wasn't it?
If anything, I would use insulated ducts. Or wrap that one with insulation.
 

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retired framer
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I am replacing some subfloor and realized I have a situation.
What do I do about ducting?

Span is 13”, and the clearance is a little over 1 1/2”.

This is where the cabinet is going so the foot of it would be sitting about 3/4 from the left.

Was thinking of using a 2x4 like normal and cutting out to fit around it.

Any other ideas? Are there rules about clearance of wood and ducting?

Moving or lowering the ducting is not possible

Edit, the picture is sideways
Are you talking about the solid blocking to join new sub floor to old?

Use 3x4" plywood for that spot.
 
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