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i want to remove two walls that run along stairs north to south that divide my kitchen and dining room(wall 1 and 2). i will take the stairs and run them west to east at northwest corner of dining room then close in the hole and make kitchen and dining room one big room with an island in the middle for base cabinets and stove. my attic has rafters that are 2x6 that run east west and run all the way with no break. if i take out the walls should i support the ceiling joists in the attic to the rafters and if so how?


 

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The pictures seems oriented correctly to me. Are you absolutely sure that you have a 2x6's spanning the entire width??? That is severely undersized. You are in SE Michigan? Detroit area? Snow load is 20-25 psf live?
 

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Wether it is exposed or not I would put a beam of at least double 2x 8 header going north south onto load bearing points half way over exterior wall and hall wall but it all depends on your framing load points from below
 

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With the joist only being 2x6's, I would say that they are likely load bearing. Are there 2 walls (or beams) in the basement directly under the 2 walls you want to remove? If so, that is more evidence they are load bearing as they will be carring the weight down to the footings.
 

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a lot of answers depends on what your building code is. the information I'm listing is based upon the 2009 International Residential Code (your code may vary, and needs to be verified by the building department).

if you have fixed stairs to the attic then attic joists must be able to support 30 pounds per square foot live load plus the weight of building materials (typically around 5-10 psf). These shall be treated as floor joists. if accessed by scuttle or pull down stairs then 20 psf, if no storage storage (areas you won't be walking around) then 10 psf. You can view the ceiling joist span tables from this code here http://publicecodes.cyberregs.com/icod/irc/2009/icod_irc_2009_8_sec002.htm

I agree with Brock, wall #2 appears to be load bearing since a 2x6 ceiling joist cannot span 22' to 23'. I'd expect the joist to be able to span around 12' to 13' (depending on species and grade of 2x6) based upon a live load of 20 psf. Also because of the location of wall #2 in regards to the basement stairs. Is there a beam in the basement under wall #2? Is there a beam under wall #1?

if you remove a load bearing wall without proper support of the attic/ceiling joists then you could experience excessive deflection of the joist which could cause cracking of the drywall/plaster ceiling and potential damage to the joists themselves (depending on actual loads).

Post back with answers to the questions and I'm sure you'll get responses.

Good luck!
 

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then I'd have to say it is load bearing. It can be removed but would need a beam to be able to support the load of the joists. ends of the beam would have to be supported by walls or columns so that loads are transferred to the ground.
 
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