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    Stevejake's Avatar
    Stevejake Posts: 1, Reputation: 1
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    #1

    Oct 24, 2010, 09:28 AM
    What size micolam beams needed so I can remove lally columns in my cellar?
    Hello all,
    I am in the process of finishing my cellar and I would like to remove 2 lally columns that are supporting the 1st floor and 2nd floor in the middle of the house. The beam now is made of 3 2x12's and the span is 18' long supporting 2x8x 12' long on top of the beam. What I would like to do is to leave the beam there and add a microlam to each side and bolt and glue it all together. Would this be enough support without any sagging? What would be the size of the 2 beams needed to support the floor? Any suggestions would be greatly appreciated? Thank you.

    Steve
    joypulv's Avatar
    joypulv Posts: 21,591, Reputation: 2941
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    #2

    Oct 24, 2010, 11:32 AM
    You need to get all the loads speced and don't forget that the concrete has to take the load too - deeper footings under the posts holding up the ends of the new beam.
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #3

    Oct 24, 2010, 11:53 AM
    This is a design engineering question. 3-2X12's is a substantial beam. Adding a glue lam would help but end support is critical too, not just bolts and glue. We just did a job for a family and decided to leave the columns, clad them in 1X6, added trim and dropped 1 outlet down each column.
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