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Hi All,
New to this forum and would be interested in your collective professional opinion(s) on what I’d like to do.
I am in the process of refininshing my basement. I would like to remove one (preferably two) lally columns. The foundation measures 24′ x 42′ (exterior), all floor joists are 2×8’s; main beam is 3) 2×8’s spiked together; knee wall is stick built 2×4 construction; lally columns about 6′-11″ apart (5 of them).
My plan is as follows:
1) Have head room to ADD, (plan to leave current beam in place), 2) 16′- 2×12’s to BOTH SIDES of the beam (6′-8″ headroom under).
2) Add bearing wall from 15′-3″ to next post (@ approx. 21′ [CL] point along main beam).
My question(s):
If I were to support gable end of beam by the full foundation thickness (~10″), and leave existing beam in place, bolt through all 7) 2x’s, can I extend new combination beam to about a 15′-9″ span and remove the two columns, (or only the first one) and still maintain the required structural support for the floor above (Split level home).
If my “plan” is not valid as it stands, any other suggestions as to how you may have solved a similar situation?
Thanks in advance,
Cadman
Replies
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Cadman, what is often used in your situation are what some call flitch plates. Your main beam is sandwiched between two steel plates. It works well but I wouldn't even consider doing it without the advice of a qualified engineer. Steel thickness, fasteners (what type, how many and where), unusual floor loads (grand piano?), one or two story house?, ...these are things that need to be considered and a good qualified engineer is the place to start.
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Hi All,
New to this forum and would be interested in your collective professional opinion(s) on what I'd like to do.
I am in the process of refininshing my basement. I would like to remove one (preferably two) lally columns. The foundation measures 24' x 42' (exterior), all floor joists are 2x8's; main beam is 3) 2x8's spiked together; knee wall is stick built 2x4 construction; lally columns about 6'-11" apart (5 of them).
My plan is as follows:
1) Have head room to ADD, (plan to leave current beam in place), 2) 16'- 2x12's to BOTH SIDES of the beam (6'-8" headroom under).
2) Add bearing wall from 15'-3" to next post (@ approx. 21' [CL] point along main beam).
My question(s):
If I were to support gable end of beam by the full foundation thickness (~10"), and leave existing beam in place, bolt through all 7) 2x's, can I extend new combination beam to about a 15'-9" span and remove the two columns, (or only the first one) and still maintain the required structural support for the floor above (Split level home).
If my "plan" is not valid as it stands, any other suggestions as to how you may have solved a similar situation?
Thanks in advance,
Cadman