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Old 09-25-2013, 05:04 PM   #1
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Header size?


Hi guys

I have decided to put a man door in my basement which is. 42" of concrete and 48" of wood knee wall.

Can someone tell me how big (wide) the header needs to be for a 30-32" man door? I was told 1" for every foot of span, so 2x4's would do, I have had others insist I need to use 2x8's or larger, so I would like an answer from someone on here, since guys here seem to REALLY know their stuff (-:

The building above is a single storey wood framed cottage about 800 sq ft. I had planned on using triple 2x8 posts to support the header

ALL input is welcome, Thanks!

Michael

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Old 09-25-2013, 06:42 PM   #2
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Header size?


So what is a "man door?" Are you talking about adding an exterior door in the basement? If so, how do you intend to use 2x8 studs? I can't imagine the framed part of your wall is that thick. Also, if this is indeed to be an exterior door, I believe code requires it to be at least 36" wide. I've also never seen an exterior door header that was less than 2x6.

Forgive the inference, but your questions lead me to suspect you don't know what you're doing.

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Old 09-25-2013, 06:45 PM   #3
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The simple answer is that 2x8 should be fine except if you have high snow loads, in which case go with 2x10. This is assuming you're using #2 or better Southern Yellow Pine. But don't trust me (or anyone else who gives you simple answers on the internet) :-). http://www.southernpine.com/pdf/ref207.pdf
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Old 09-25-2013, 06:46 PM   #4
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Yes, exterior door, doesn't have to be 36" (at least where I am) concrete foundation is 8" thick and knee wall is framed with 2x8's. The door I looked at has a frame and door all together, installed as a unit. Door frame is just over 7" wide .
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Old 09-25-2013, 06:51 PM   #5
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Header size?


Thank you Cortell

That's the answer I was looking for, I had planned on buying the lumber from a big box store. Not sure how good the quality of their wood is? There isn't much in the way of snow loads, it's a peaked steel roof with a significant pitch, should be good with 2x8's

Thanks!
Michael
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Old 09-25-2013, 07:36 PM   #6
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Header size?


you never stated what direction the joists are running. if there are joists bearing on the wall that the door will be in i would be using 2x10 or atleast a triple 2x8.

as for entry door size 32" is the minimum in most areas
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Old 09-25-2013, 07:41 PM   #7
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The floor joists ARE load bearing on the wall I had planned on using triple 2x?'s with a piece of plywood sandwiched between to make up the difference in width. The door I looked at was 30" but I could have misread the label, will call tommorow and ask, the cottage is on an Island and building regs are pretty lax to say the least.
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Old 09-25-2013, 09:56 PM   #8
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I just checked the 2006 IRC. For an opening in an exterior wall that's holding up a roof, ceiling and one clear span floor, a header composed of two 2x8s would safely span 3'6", and that's in the worst case. Worst case means very heavy (70 psf) ground snow load, and a building that's 36' wide. Note that these calculations (and the document I linked) assume the floor joists are bearing on the wall.

Also, you'll need two jack posts under each end of the header.
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Old 09-25-2013, 11:50 PM   #9
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IRC; http://publicecodes.cyberregs.com/ic...9_5_par024.htm figure your local snow load...

Gary
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Old 09-25-2013, 11:52 PM   #10
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Header size?


Thanks for the Input and links, I'm in Ontario, Canada so we get a fair amount of snow, but, not as much as some places!

Thanks Again!
Michael

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