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  1. #1
    Join Date
    Mar 2007
    Location
    Spring City/Surrounding Philadelphia area
    Posts
    3,473

    Default New Joists with Mortise and Tenon Joinery

    On top of the many inadequate structural repairs in the basement/crawlspace of this house, the workers made a mortise and tenon joint when a joist hanger would have been so much easier. I can't see there being much strength left in this tenon as it looks to have been cut too small. I still see many houses with the method of construction and I have the same in my own house but there's just better ways to do this now.

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    "It takes a big man to cry. It takes an even bigger man to laugh at that man". - Jack Handey

  2. #2
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,248

    Default Re: New Joists with Mortise and Tenon Joinery

    Yep, they need to add hangers now (and should have added them even at the start).

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  3. #3
    Join Date
    Feb 2009
    Location
    Southern Vancouver Island
    Posts
    4,546

    Default Re: New Joists with Mortise and Tenon Joinery

    It looks like the mortise hole was there, and the urge to poke a new tenon in there was just too strong.

    John Kogel, RHI, BC HI Lic #47455
    www.allsafehome.ca

  4. #4
    Join Date
    Aug 2011
    Location
    Hercules, CA
    Posts
    158

    Default Re: New Joists with Mortise and Tenon Joinery

    Bending moment strength of a double 2x12, shear strength of a double 2x4....

    Thom Huggett, PE, SE, CBO

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