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  1. #1
    Herb Scott's Avatar
    Herb Scott Guest

    Default Deck ledger fastened through cords of truss joist

    I inspected a house to day that had a deck ledger plate bolted with through bolts through the top and bottom cord of a truss joist that was used for the rim joist. I know that a truss joist can be used as a rim joist but TJI recommends and details a truss joist rim board for when a deck ledger plate is to be fastened to it. Technical help would not say if what I found was acceptable or not. The visible inside web was not beefed up. Does anyone have any info as to weather this is permitted.
    Thanks, Herb

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  2. #2
    Join Date
    Mar 2007
    Location
    Mahtomedi, Minnesota
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    92

    Default Re: Deck ledger fastened through cords of truss joist

    Quote Originally Posted by Herb Scott View Post
    Does anyone have any info as to weather this is permitted.
    Thanks, Herb
    Your description is not precise enough for me to say anything positive. Do you have photos?

    Fred Comb, ACI
    Mahtomedi, MN
    www.homeinspectionsofmn.com

  3. #3
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Deck ledger fastened through cords of truss joist

    The NC required 4 hour CE class on Deck Inspections had that same scenario. They said it required additional support as the I beams are not designed to support a deck bolted to it. I'll see if I can find more info and post it.


  4. #4
    chris mcintyre's Avatar
    chris mcintyre Guest

    Default Re: Deck ledger fastened through cords of truss joist

    Quote Originally Posted by Herb Scott View Post
    ....that had a deck ledger plate bolted with through bolts through the top and bottom cord of a truss joist that was used for the rim joist.

    Top and bottom flanges cannot be cut or drilled.

    Attached picture is from here: http://www.ilevel.com/literature/TJ-9001.pdf

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  5. #5
    chris mcintyre's Avatar
    chris mcintyre Guest

    Default Re: Deck ledger fastened through cords of truss joist

    ....from the same document.

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  6. #6
    Join Date
    Mar 2007
    Location
    New Mexico
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    1,258

    Default Re: Deck ledger fastened through cords of truss joist

    I imagined that the TJI people would want that through bolted. I'm surprised they don't mention that in the diagram.

    Jim Robinson
    New Mexico, USA

  7. #7
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Deck ledger fastened through cords of truss joist

    Here is the NC CE section on decks.....check out page 30 to see if it helps


    http://www.ncdoi.com/OSFM/Engineerin...Update2009.pdf


  8. #8
    Join Date
    Sep 2007
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    Fredericksburg, VA
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    885

    Default Re: Deck ledger fastened through cords of truss joist

    Quote Originally Posted by Herb Scott View Post
    I inspected a house to day that had a deck ledger plate bolted with through bolts through the top and bottom cord of a truss joist that was used for the rim joist. I know that a truss joist can be used as a rim joist but TJI recommends and details a truss joist rim board for when a deck ledger plate is to be fastened to it. Technical help would not say if what I found was acceptable or not. The visible inside web was not beefed up. Does anyone have any info as to weather this is permitted.
    Thanks, Herb
    Unless specifically included in the design, field modifications to the top and bottom chords or webs are expressly forbidden by manufactured truss installation guides. That would include drilled holes.

    As far as I know, standard trusses are designed to support vertical forces not horizontal. Unless the truss was designed and installed specifically for the side load of a deck ledger

    The above statements are expressed solely as my opinion and in all probability will conflict with someone else's.
    Stu, Fredericksburg VA

  9. #9
    Join Date
    Mar 2007
    Location
    Chicago, IL
    Posts
    2,797

    Default Re: Deck ledger fastened through cords of truss joist

    Interesting article about deck ledger and beam attachment:

    Working With the IRC Ledger Bolting Table

    Michael Thomas
    Paragon Property Services Inc., Chicago IL
    http://paragoninspects.com

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