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Old 11-07-2016, 11:56 AM   #1
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Extend header on load bearing wall


Hello,

This is a basement of a two story home. I have a door opening that is currently 36" wide with 3 2x8 header in a 2x6 framed wall and is load bearing.

I want to widen the doorway and make it 62" wide. I am planning on using the same 3 - 2x8 header for this span......sound ok?

I'm in Canada


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Old 11-07-2016, 12:08 PM   #2
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Re: Extend header on load bearing wall


You need to discuss this project with the building inspector. If your floor above has a design load of 40 psf, your factor of safety for a 62 inch opening with (3) 2x8 members may be below code requirements. Unfortunately I am not familiar with Canadian building code, my comments on factor of safety relate to commonly used US building codes.
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Old 11-07-2016, 12:19 PM   #3
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Re: Extend header on load bearing wall


I agree with Daniel on this one.

Because that wall is 6" wide....good chance it's supporting a lot of weight above it.

Not worth taking chances.....talk to your inspector.

If it was me....what ever they said it needed to be with sawn lumber, I'd be using a PSL beam. But that's me.
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Old 11-07-2016, 04:35 PM   #4
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Re: Extend header on load bearing wall


I have a copy of the CDN span Tables in a 2 page PDF, but it is larger than the Forum allows for uploads.

The rating of the Header will depend on the load resting upon it, which is a function of the joist length in this instance.
Can you measure the joist lengths on each side of that wall and post them here?

Thanks.

*EDIT*

Also, single story or two story home?
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Old 11-07-2016, 05:03 PM   #5
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Extend header on load bearing wall


Joist lengths are 11' on each side to the Center of load bearing wall....and it's a 2 storey

Joists are 2x8 16" on centrr


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Old 11-07-2016, 07:05 PM   #6
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Re: Extend header on load bearing wall


Using 12 feet of supported Joists, it looks like a triple 2 x 8 header would work if it is defined as a "Beam" since it is actually a structural lintel holding both joists plus likely the second floor and roof. Use a double Jack under each end to bear the weight as a Beam rather than a Lintel and it should be good.

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Old 11-07-2016, 07:11 PM   #7
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Re: Extend header on load bearing wall


Quote:
Originally Posted by jlhaslip View Post
Using 12 feet of supported Joists, it looks like a triple 2 x 8 header would work if it is defined as a "Beam" since it is actually a structural lintel holding both joists plus likely the second floor and roof. Use a double Jack under each end to bear the weight as a Beam rather than a Lintel and it should be good.

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Thanks for the info....it validates what I found on other spam tables as well


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Old 11-08-2016, 06:26 AM   #8
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Re: Extend header on load bearing wall


Here is the building code for my area so it seems 62" opening will work if I read the tables right.


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Old 11-08-2016, 09:44 AM   #9
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Re: Extend header on load bearing wall


I mentioned it once before....

Instead of using 3 2x8's....I'd use either a gluelam or PSL beam. The cost is not really that much more....just a few $$ more. But that beam would be a lot stiffer....much less likely to ever bend. It will also fill the area much better since it's going to be the exact thickness you want.

3 2x8's is going to be 4 1/2" thick. You're 6x wall is 5.5. You're short an inch.

The PSL will the exact thickness you want. Makes drywalling easier.

And ditto on the double jack....or just use a 4x6 and nail from the king stud side.

Less chance of warping....and with no nails on the 'working' side, makes life a little easier trimming out.
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