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I would like replace a 64" section of a load bearing wall with a beam and 2 support posts. The current wall is 2x4 pressure treated sill plate on top of poured concrete, 5 2x4 vertical supports and double 2x4 header. enter image description here

I am looking for advice on materials to use. I am thinking about using 4x4 p/t supports, and doubled 2x8 for the beam. On one the left end of the new beam I would probably just nail the support beam the existing 2x4 on the other end I'm not really sure, but it will be perpendicular to a another wall that will be built (see proposed design below). Will this work?

If there are any major structural concerns, I could make the span shorter, but I would like to keep it as wide as possible. How should the beam be attached to the supports? Finally, any considerations for distributing the weight at the base? Thanks!

enter image description here

  • "64' section" - did you really mean 64 feet, or 64 inches? – mbeckish Nov 11 '14 at 16:40
  • oh man..inches. pretty big detail to miss, thanks for the notice – jriggs Nov 11 '14 at 16:49
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    I'd call in an engineer on any substantial change to loadbearing structures. They can suggest best/least-cost solutions and materials (in my case, that involved sistering a joist with a steel C-beam). And given the consequences of getting this wrong... – keshlam Nov 11 '14 at 16:52
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    Not saying this isn't load bearing but how are you sure it is? It isn't normal for a small section of basement to have a framed load bearing section. Also if it was load bearing I would think it would extend to the wall. – DMoore Nov 11 '14 at 17:09
  • DMoore, it is my understanding that most load bearing walls will have the doubled header. House is 2 story and directly above this is a wall that extends to the 2nd level which would definitely be supporting 2nd floor joists. Directly above is the base of the stairs to the 2nd floor. If not load bearing, it certainly provides stability. doesnt support the roof trusses though. – jriggs Nov 11 '14 at 17:29

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