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mgbinspect

2 x 4 window headers?

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Yesterday, during a pre-drywall new construction inspection, I noticed that the framed window opening headers were 2 x 4's instead of 2 x 6's or 2 x 8's. The wall thickness is six inches, so there are three 2 x 4's in each header. 

Since this is the first time I've seen this, I wonder if any of my fellow home inspectors have run across this and found it to be an approved practice?

Thanks in advance for any input.

 

 

IMG_20190922_131722.jpg

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6 minutes ago, Tom Raymond said:

The actual header is likely at the rim joist.

Did you pull back any insulation?

How would the ceiling load be transferred to a rim joist on a TIJ ceiling?

Take a look at Table R 502.5(1).

Edited by Marc

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6 minutes ago, Marc said:

How would the ceiling load be transferred to a rim joist on a TIJ ceiling?

(I was trying to put that together in my head as well...)

Edited by mgbinspect

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Joist hangers. By moving the header into the platform you create room for installation. Especially important if you're going to rely on inefficient fiberglass. 

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Just now, mgbinspect said:

Back to the subject - has anyone run across this? I think it's panelized construction.

I've never seen wall headers any smaller than 2X6 in my 'unsophisticated' area.

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Nothing in the code says that the header has to be at the top of the window. There is no prohibition of placing it in the platform assembly. In fact, the TJI manuals typically detail several options for doing exactly that. 

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Supporting roof, ceiling, and one center bearing floor, the IRC says that 2 2x4's can span 27 inches. with a 50# snow load. Where you are, they can span 32 inches.

 3 2x4's aren't in the chart but they're likely up to that task. Look at the plans. 

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21 hours ago, Chad Fabry said:

3 2x4's aren't in the chart but they're likely up to that task. Look at the plans. 

 

I deduced that was probably the case as well. It was just a first for me, so I thought I'd bounce it off all you braniacs. Thanks for the input.

Edited by mgbinspect

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On 9/23/2019 at 8:35 AM, Marc said:

I've never seen wall headers any smaller than 2X6 in my 'unsophisticated' area.

Me either, which is why this was a curveball.

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