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kneewall

04:57AM | 06/19/03
Member Since: 06/18/03
4 lifetime posts
Bvtools
I'm looking to insert a chest of drawers into the attic kneewall space. In order to do so, I'll have to cut through several supporting studs. Can someone please advise me on the header design needed to proxy for the removed studs? If there's a rule of thumb used to determine such things, I'd appreciate that as well.

Thanks in advance for your help.

Altereagle

06:51AM | 06/19/03
Member Since: 12/27/02
543 lifetime posts
If it's just a knee wall all it may be doing is acting as a perlin for the rafter span.. I even doubt that, but over kill would be 2 2x6 (4x6) as the header, for a regular chest of what 3'. That would easily handle that span (unless you have a tile roof)... I'm treating it as if it were an exterior door, so without seeing the project that would only be a guess.

Alter Eagle Construction & Design

kneewall

07:08AM | 06/19/03
Member Since: 06/18/03
4 lifetime posts
If it is "a perlin for the rafter span", is a header even needed? I guess I'm not sure how to tell if a wall is a load-bearing one. There is about 5 feet of "attic space" behind this kneewall before the roof slants down to meet the exterior wall.

Thanks for you reply.

Altereagle

09:28AM | 06/20/03
Member Since: 12/27/02
543 lifetime posts
What is the size, species & span of the rafters?

kneewall

02:22AM | 06/23/03
Member Since: 06/18/03
4 lifetime posts
The span is about 15 feet between the front exterior wall and the back kneewall, 20 feet between the front exterior and back exterior walls.
The rafters are 2X6's spaced 16 inches on center.
The species I'm not sure of, but I'm in the Atlanta, GA area if there's a "typical" species used for this area. My first guess is pine, but I couldn't be sure.

Altereagle

08:10AM | 06/23/03
Member Since: 12/27/02
543 lifetime posts
You can span 12'10 with 2x6 @ 16 o/c without a ceiling (drywall) on them with a light roofing 11'10 with drywall, #2 or better doug fir / larch.

If the house is 20' I'm going to assume the ridge line is at 10' and that would be the span, so you won't need support at the kneewall.

If the ridge isn't in the center but offset, the calc would be a little different... but if it is the way I'm assuming it looks like you'll be fine to take out 3' of knee wall.

Alter Eagle Construction & Design

kneewall

08:35AM | 06/23/03
Member Since: 06/18/03
4 lifetime posts
Thanks for your help!
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