notches and holes in floor joist

Discussion in 'Remodel Forum & Blog' started by plaza500, Aug 31, 2010.

  1. plaza500

    plaza500 DIY Member

    Messages:
    35
    Location:
    Canada
    hey there folks

    i thought i had a leak in my ceiling, the plaster was cracking a bit, so today i took a knife to it can cut out a section to take a peek.

    here is what i found - now there is nothing below this, it is my dining room. no support beam whatsoever and the nearest wall is probably 3', 4' and 6' away in either direction.

    the beam has three holers drilled in it, and notch cut out of the top.

    the beam is almost 6.75" long, and the notch is 2.75" deep.

    do i now have a structural problem and what can be done to correct this?

    attached pics

    [​IMG]

    [​IMG]

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    here is where it is

    [​IMG]
    Last edited: Aug 31, 2010
  2. dlarrivee

    dlarrivee New Member

    Messages:
    1,172
    Location:
    Canada
    The notch in the top is a problem.

    Is it a 2x8, or 4x8 beam?
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,058
    Location:
    New England
    Notches are never good. Holes in the middle, not so bad. A joist gets much of its strength from compressive strength on the top edge, and tensil strength on the bottom edge (sort of like an I-beam or truss that could be mostly hollow in the middle). Cutting it there significantly decreases it's overall strength. Cracks in the plaster show movement.
  4. dlarrivee

    dlarrivee New Member

    Messages:
    1,172
    Location:
    Canada
    As far as repairing that notch, I would be tempted to pull the entire ceiling and making sure this isn't a typical practice of whoever may have worked on the home at one time.
  5. Ian Gills

    Ian Gills Senior Robin Hood Guy

    Messages:
    2,777
    Location:
    USA
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